<PAGE>   1
 
   
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH 15, 2000
    
 
                                                      REGISTRATION NO. 333-95093
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                              WASHINGTON, DC 20549
                            ------------------------
 
   
                                AMENDMENT NO. 2
    
                                       TO
 
                                    FORM S-1
                             REGISTRATION STATEMENT
                                   UNDER THE
                             SECURITIES ACT OF 1933
                            ------------------------
 
                       CABOT MICROELECTRONICS CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 

<TABLE>
<S>                                 <C>                                 <C>
             DELAWARE                              3291                             36-4324765
  (STATE OR OTHER JURISDICTION OF      (PRIMARY STANDARD INDUSTRIAL              (I.R.S. EMPLOYER
  INCORPORATION OR ORGANIZATION)        CLASSIFICATION CODE NUMBER)           IDENTIFICATION NUMBER)
</TABLE>

 
                            ------------------------
 
                            870 NORTH COMMONS DRIVE
                             AURORA, ILLINOIS 60504
                                 (630) 375-6631
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                                MATTHEW NEVILLE
                       CABOT MICROELECTRONICS CORPORATION
                            CHIEF EXECUTIVE OFFICER
                            870 NORTH COMMONS DRIVE
                             AURORA, ILLINOIS 60504
                                 (630) 375-6631
 (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
                            ------------------------
 
                                   COPIES TO:
 

<TABLE>
<S>                                                  <C>
            THOMAS W. CHRISTOPHER, ESQ.                           DUNCAN C. MCCURRACH, ESQ.
      FRIED, FRANK, HARRIS, SHRIVER & JACOBSON                       SULLIVAN & CROMWELL
                 ONE NEW YORK PLAZA                                    125 BROAD STREET
              NEW YORK, NEW YORK 10004                             NEW YORK, NEW YORK 10004
                   (212) 859-8000                                       (212) 558-4000
</TABLE>

 
                            ------------------------
 
    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this Registration Statement becomes effective.
                            ------------------------
 
    If any of the securities being registered on this form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act,
check the following box.  [ ]
 
    If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [ ] ----------
 
    If this form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ] ----------
 
   
    If this form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the registration statement for the same
offering. [ ] ----------
    
 
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
check the following box. [ ] ----------
                            ------------------------
 

                        CALCULATION OF REGISTRATION FEE
 
   

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------
                                              NUMBER OF         PROPOSED MAXIMUM       PROPOSED MAXIMUM
        TITLE OF EACH CLASS OF               SECURITIES        AGGREGATE OFFERING         AGGREGATE              AMOUNT OF
      SECURITIES TO BE REGISTERED         TO BE REGISTERED     PRICE PER SHARE(1)     OFFERING PRICE(1)     REGISTRATION FEE(2)
---------------------------------------------------------------------------------------------------------------------------------
<S>                                      <C>                 <C>                    <C>                    <C>
Common Stock, par value $.001 per
  share................................       4,600,000              $17.00              $78,200,000              $20,645
---------------------------------------------------------------------------------------------------------------------------------
Preferred Share Purchase Rights(3).....       4,600,000                --                     --                     --
---------------------------------------------------------------------------------------------------------------------------------
Total..................................       9,200,000                --                $78,200,000              $20,645
---------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------
</TABLE>

    
 
   
(1) Estimated solely for the purpose of calculating the registration fee
    pursuant to Rule 457(a) under the Securities Act of 1933.
    
 
   
(2) The Registrant previously paid a fee of $19,800 in connection with the
    initial filing of the Registration Statement. An additional fee of $845 is
    being paid in connection with the filing of this Amendment No. 2.
    
 
   
(3) The rights will initially trade together with the common stock. The value
    attributable to the rights, if any, is reflected in the market price of the
    common stock.
    
                            ------------------------
 
    THE REGISTRANT HEREBY AMENDS THE REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.
 
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

<PAGE>   2
 
       THE INFORMATION IN THIS PRELIMINARY PROSPECTUS IS NOT COMPLETE AND MAY BE
       CHANGED. THESE SECURITIES MAY NOT BE SOLD UNTIL THE REGISTRATION
       STATEMENT FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE.
       THIS PRELIMINARY PROSPECTUS IS NOT AN OFFER TO SELL NOR DOES IT SEEK AN
       OFFER TO BUY THESE SECURITIES IN ANY JURISDICTION WHERE THE OFFER OR SALE
       IS NOT PERMITTED.
 
   
                  SUBJECT TO COMPLETION. DATED MARCH 15, 2000.
    
 
   
                                4,000,000 Shares
    
                       CABOT MICROELECTRONICS CORPORATION
                                  Common Stock
[CABOT MICROELECTRONICS LOGO]
                            ------------------------
 
   
     This is an initial public offering of shares of common stock of Cabot
Microelectronics Corporation. All of the 4,000,000 shares of common stock are
being sold by Cabot Microelectronics. We expect that all or substantially all of
the net proceeds of this offering will be paid to Cabot Corporation, our parent
corporation, in the form of a dividend.
    
 
   
     Prior to this offering, there has been no public market for the common
stock. It is currently estimated that the initial public offering price per
share will be between $15.00 and $17.00. We have applied to list our common
stock on the Nasdaq National Market under the symbol "CCMP".
    
 
     Upon completion of this offering, Cabot Corporation will directly own at
least 80% of our outstanding common stock and will continue to control us.
 
   
     SEE "RISK FACTORS" BEGINNING ON PAGE 7 TO READ ABOUT FACTORS YOU SHOULD
CONSIDER BEFORE BUYING SHARES OF THE COMMON STOCK.
    
 
                            ------------------------
 
    NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY OTHER REGULATORY BODY
HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
 
                            ------------------------
 

<TABLE>
<CAPTION>
                                                            PER SHARE       TOTAL
                                                            ---------       -----
<S>                                                         <C>           <C>
Initial public offering price.............................  $             $
Underwriting discount.....................................  $             $
Proceeds, before expenses, to Cabot Microelectronics......  $             $
</TABLE>

 
   
     To the extent that the underwriters sell more than 4,000,000 shares of
common stock, the underwriters have the option to purchase up to an additional
600,000 shares from us at the initial public offering price less the
underwriting discount.
    
 
                            ------------------------
 
     The underwriters expect to deliver the shares on               , 2000.
 
GOLDMAN, SACHS & CO.
 
                               MERRILL LYNCH & CO.
                                                   ROBERTSON STEPHENS
 
                            ------------------------
 
                     Prospectus dated               , 2000.

<PAGE>   3
 
                               INSIDE FRONT COVER
   
 
OUTSIDE PORTION OF GATEFOLD:
 
[Graphical depiction of the role of our CMP products in the microchip
manufacturing process and the applications in which microchips are used.]
 
Our products are an increasingly important part of the microchip manufacturing
process.
 
Our products play an important part in the manufacture of advanced integrated
circuit (IC) devices, which have become critical components in a wide variety of
products and applications -- computers, wireless communications,
telecommunications switches, personal data assistants, internet servers and many
more.
 
While we do not make the electronic products shown above, our CMP slurries play
a key role in manufacturing the IC devices used in those products.
 
LEFT-HAND PAGE OF GATEFOLD:
 
[Graphical depiction of cross-sections of IC devices, as taken from a silicon
wafer, with, and without, the chemical mechanical planarization process.]

We supply sophisticated polishing slurries that play a critical role in our
customers' manufacturing processes. Our products enable:
 
     -- IC manufacturers to make smaller, faster and more complex devices and
        improve their production processes
 
     -- Hard disk drive manufacturers to significantly increase the storage
        capacity and improve the speed and reliability of information exchange
 
CHEMICAL MECHANICAL PLANARIZATION -
 
Our polishing slurries are used in a process known as chemical mechanical
planarization (CMP). Using our slurries, manufacturers planarize, or level and
smooth, many of the multiple layers that are built upon silicon wafers to
produce IC devices. CMP is also used to remove excess materials that are
deposited on layers. Hard disk drive manufacturers use a similar process to
smooth the surface of the coatings on hard disks before depositing magnetic
media.
 
RIGHT-HAND PAGE OF GATEFOLD:
 
[Graphical depiction of CMP polishing process and example of Epic polishing
pad.]
 
CMP SLURRY -
 
CMP slurries are liquid compounds composed of high-purity deionized water,
chemical additives and abrasive agents that chemically interact with the surface
material at an atomic level. Our Semi-Sperse(R) and Lustra(TM) slurries are
formulated specifically for the particular surface to be polished.

 
CMP POLISHING PAD -
 
While we have not yet commenced commercial production, our Epic(TM) pads have
been designed to be used in conjunction with a CMP slurry to optimize the
polishing process. These pads play a critical role in achieving planarity and in
providing highly consistent and reliable CMP process results.
    


<PAGE>   4
 

                               PROSPECTUS SUMMARY
 
     You should read the following summary together with the more detailed
information about our company and common stock and our financial statements and
the notes to those statements appearing elsewhere in this prospectus.
 
   
     The information in this prospectus assumes that the initial public offering
price will be $16.00 per share, the midpoint of the range disclosed on the cover
of this prospectus.
    
 
   
     Unless otherwise indicated, all references in this prospectus to us are to
Cabot Microelectronics, to Cabot Corporation are to Cabot and its subsidiaries
other than us, and to years are to our fiscal years ended September 30 of the
year indicated.
    
 
   
     Unless otherwise indicated, all references in this prospectus to the number
of outstanding shares of our common stock give effect to an increase in the
number of our authorized shares of common stock from 5,000 shares to 200,000,000
shares and an 18,989.744 to 1 stock split, both of which will be effected prior
to the completion of this offering.
    
 
     Unless otherwise indicated, all information in this prospectus assumes the
underwriters' option to purchase additional shares in this offering will not be
exercised.
 
                                  OUR BUSINESS
 
     We are the leading supplier of slurries used in chemical mechanical
planarization, or CMP, a polishing process used in the manufacturing of
integrated circuit, or IC, devices. CMP is an increasingly important part of the
IC device manufacturing process because it helps manufacturers make smaller,
faster and more complex IC devices and improves their production efficiency. CMP
slurries are liquids containing abrasives and chemicals that facilitate and
enhance the CMP polishing process. We believe that we sell approximately 80% of
all CMP slurries sold to IC device manufacturers worldwide.
 
   
     For the fiscal year ended September 30, 1999, our sales increased 68% over
the prior year to approximately $98.7 million and our net income increased 190%
over the prior year to approximately $12.3 million. On a pro forma basis, for
the fiscal year ended September 30, 1999, our sales would have been
approximately $97.7 million and our net income would have been approximately
$7.9 million. For the three months ended December 31, 1999, our sales increased
68% over the same period in the prior year to approximately $35.0 million and
our net income increased 142% over the same period in the prior year to
approximately $5.7 million. On a pro forma basis, for the three months ended
December 31, 1999, our sales would have been approximately $34.8 million and our
net income would have been approximately $4.7 million. For a discussion of the
pro forma adjustments, see "Unaudited Pro Forma Combined Statements of Income".
    
 
   
     Since the first significant commercial sales of CMP slurries to the
semiconductor industry in the early 1990s, use of CMP in the production of IC
devices has grown rapidly. We estimate that sales of CMP slurries have grown at
an average annual compound rate of 60% since 1997 and increased to a total of
approximately $120 million for 1999.
    
 
   
     CMP is used in the production of a wide variety of IC devices, including
logic devices, such as microprocessors, and memory chips that store computer
data. The benefits of CMP become increasingly important to IC device
manufacturers as the size of the devices shrink and their complexity increases.
By reducing the size of IC devices, manufacturers increase their throughput, or
the number of IC devices that they manufacture in a given time period. CMP also
helps reduce the number of defective or substandard IC devices produced, which
increases the device yield. Improvements in throughput and yield reduce an IC
device manufacturer's total production costs. Based on existing technology, we
believe that CMP is required for the efficient manufacturing of today's advanced
IC devices.
    
 
   
     We have developed several different types and generations of slurries for
polishing
    
 
                                        3

<PAGE>   5
 
   
the insulating layers of IC devices, historically the most common use of CMP. We
developed and introduced in 1994 a CMP slurry for polishing the tungsten plugs
used to connect the multiple wiring layers of IC devices. In 1999, sales of CMP
slurries for polishing insulating layers represented approximately two-thirds of
our total sales and sales of CMP slurries for polishing tungsten plugs
represented almost all of the balance.
    
 
   
     We have also begun selling new slurries for CMP polishing of the magnetic
heads and the coating on hard disks in hard disk drives. In addition, we
recently began limited production of CMP polishing pads for customer evaluation
and qualification.
    
 
   
                                INDUSTRY TRENDS
    
 
   
     The rapid growth of the CMP slurry market has been driven in large part by
the significant growth and technological advances the semiconductor industry has
experienced over the past decade. IC devices have become critical components in
an increasingly wide variety of products and applications and the use of IC
devices in these products and applications has grown significantly in recent
years. According to industry sources, the worldwide semiconductor market as
measured by total sales grew at an average annual compound rate of 11% in the
period from 1988 through 1998. We believe that worldwide revenues from the sale
of CMP slurries to IC device manufacturers grew to approximately $120 million in
1999. Industry surveys project that annual worldwide revenues in this market
will grow to between approximately $300 and $400 million by 2003.
    
 
   
                                    STRATEGY
    
 
   
     Our objective is to maximize our profitability and stockholder value by
maintaining and leveraging our leading position in the CMP slurry market. We
will pursue the following strategies to achieve our objective:
    
 
   
- remain the technology leader in CMP slurries;
    
 
   
- build and maintain customer intimacy;
    
 
   
- expand globally;
    
 
   
- attract and retain top quality personnel;
    
   
- maintain top quality products and supply; and
    
 
   
- expand into new applications and products.
    
 
                      RELATIONSHIP WITH CABOT CORPORATION
 
   
     We are a wholly owned subsidiary of Cabot Corporation, a global chemical
manufacturing company based in Boston, Massachusetts. Prior to the transfer to
us of the assets and liabilities relating to our business, our business was
operated as a division of Cabot. After this offering, we will continue to be
controlled by Cabot, which will own at least 80% of the outstanding shares of
our common stock. As our controlling stockholder, Cabot will be able to approve
or reject major corporate transactions without the support of any other
stockholder, including a merger, consolidation or sale of substantially all our
assets.
    
 
   
     Cabot has indicated that, following this offering, it intends to divest its
remaining equity interest in us by means of a distribution to its stockholders
within six to twelve months after the date of a private letter ruling from the
IRS confirming that the spin-off is tax-free to Cabot. This transaction is
sometimes referred to in this prospectus as the spin-off. Cabot may not complete
its divestiture of its remaining equity interest in us in this time frame or at
all.
    
 
   
     We will enter into agreements with Cabot governing various interim and
ongoing relationships between us and Cabot. For a further discussion of these
agreements, see "Relationships Between Our Company and Cabot Corporation".
    
 
                                        4

<PAGE>   6
 
                                  THE OFFERING
 
   

<TABLE>
<S>                                            <C>
Common stock offered by us...................  4,000,000 shares
Common stock to be outstanding after this
  offering...................................  22,989,744 shares or 23,589,744 shares if the
                                               underwriters exercise their over-allotment option in
                                               full. These shares do not include 3,500,000 shares
                                               reserved for issuance pursuant to options that we may
                                               issue in the future pursuant to our stock option
                                               plan. In addition, these shares do not include
                                               475,000 shares available for purchase under our
                                               employee stock purchase plan.
Use of proceeds..............................  We expect that all or substantially all of the net
                                               proceeds of this offering will be paid to Cabot in
                                               the form of a dividend.
Proposed Nasdaq symbol.......................  CCMP
</TABLE>

    
 
                             ----------------------
 
     We were incorporated in Delaware in October 1999.  Our principal executive
offices are located at 870 North Commons Drive, Aurora, Illinois, 60504. Our
telephone number at that location is (630) 375-6631.
 
                                        5

<PAGE>   7
 
                      SUMMARY AND PRO FORMA FINANCIAL DATA
 
   
     The following table presents our summary and pro forma condensed combined
financial data and has been derived from our audited financial statements for
the fiscal years ended September 30, 1997, 1998 and 1999 and from our unaudited
financial statements for the three months ended December 31, 1998 and 1999, each
of which are included elsewhere in this prospectus, and from our unaudited
financial statements for the fiscal years ended September 30, 1995 and 1996. The
unaudited interim financial information for the three month periods ended
December 31, 1998 and 1999 has been prepared on the same basis as the annual
financial statements and includes all adjustments, consisting only of normal
recurring adjustments, which management considers necessary for the fair
presentation of that financial information. The unaudited results for interim
periods are not necessarily indicative of results to be expected for any other
interim period or the full year. The unaudited pro forma combined statement of
operations data give effect to our new fumed metal oxide supply agreement and
new dispersion services agreement with Cabot, each of which will become
effective upon completion of this offering, as if they had been in effect since
October 1, 1998 and do not purport to represent our results of operations for
any future period. Because we began to operate as a separate division of Cabot
in July 1995, the statement of operations data for 1995 include only three
months of activity. As adjusted balance sheet data give effect to the proceeds
from the sale of 4,000,000 shares of common stock in this offering, the
dividends to Cabot and the transfer of our business from Cabot to us. The data
below should be read in conjunction with "Selected Financial Data", "Unaudited
Pro Forma Combined Statements of Income", "Management's Discussion and Analysis
of Financial Condition and Results of Operations" and our combined financial
statements and the notes to our combined financial statements, each of which is
included elsewhere in this prospectus.
    
 
     An income tax benefit was recorded in 1997 as a result of a tax credit for
research and development activities that exceeded our statutory taxes for that
period.
 
   

<TABLE>
<CAPTION>
                                                                                                 THREE MONTHS ENDED
                                                    YEAR ENDED SEPTEMBER 30,                        DECEMBER 31,
                       THREE MONTHS    ---------------------------------------------------   ---------------------------
                           ENDED                                                   PRO                             PRO
                       SEPTEMBER 30,                                              FORMA                           FORMA
                           1995         1996      1997      1998      1999        1999        1998      1999      1999
                       -------------    ----      ----      ----      ----        -----       ----      ----      -----
                                                                (in thousands)
<S>                    <C>             <C>       <C>       <C>       <C>       <C>           <C>       <C>       <C>
COMBINED STATEMENT OF
  OPERATIONS DATA:
Total revenue........     $5,003       $24,334   $35,211   $58,831   $98,690     $97,695     $20,875   $35,046   $34,804
Gross profit.........      1,978        10,987    15,290    29,176    50,799      45,223      10,839    18,858    17,554
Income (loss) before
  income taxes.......        577        (1,513)      663     6,448    19,076      12,287       3,690     9,048     7,428
Net income (loss)....        355          (866)      708     4,237    12,280       7,910       2,377     5,748     4,719
</TABLE>

    
 
   

<TABLE>
<CAPTION>
                                                              AS OF DECEMBER 31, 1999
                                                              ------------------------
                                                                           PRO FORMA
                                                               ACTUAL     AS ADJUSTED
                                                               ------     -----------
                                                                   (in thousands)
<S>                                                           <C>         <C>
COMBINED BALANCE SHEET DATA:
Cash........................................................  $   103       $ 5,303
Working capital.............................................   25,293        29,480
Total assets................................................   82,986        84,386
Current liabilities.........................................    7,402         8,415
Total liabilities...........................................    7,930        24,930
Division equity.............................................   75,056        59,456
Total liabilities and division equity.......................   82,986        84,386
</TABLE>

    
 
                                        6

<PAGE>   8
 

                                  RISK FACTORS
 
     You should carefully consider the risks described below before you decide
to buy our common stock. If any of the following risks were to occur, our
business, financial condition or results of operations could suffer. In that
event, the trading price of our common stock could decline, and you may lose all
or part of your investment.
 
     This prospectus contains forward-looking statements based on our current
expectations, assumptions, estimates and projections about our company and our
industry. These forward-looking statements involve risks and uncertainties. Our
actual results could differ materially from those anticipated in these
forward-looking statements as a result of various factors, as more fully
described below and elsewhere in this prospectus.
 
                         RISKS RELATING TO OUR BUSINESS
 
WE HAVE NEVER OPERATED AS A STAND-ALONE ENTITY AND OUR BUSINESS COULD SUFFER IF
WE FAIL TO DEVELOP THE SYSTEMS AND INFRASTRUCTURE NECESSARY TO SUPPORT OUR
BUSINESS AS A STAND-ALONE ENTITY
 
   
     Following this offering, we will operate as a stand-alone entity and,
accordingly, must develop and implement the systems and infrastructure necessary
to support our current and future business. If we fail to develop these systems
and infrastructure, our business will suffer. We have been a part of Cabot since
we began developing CMP slurries in 1985. We were organized as a separate
division of Cabot in July 1995. Cabot has historically provided us with
operational, financial and other support. Although Cabot will provide us with
the various interim and ongoing services described in "Relationships Between Our
Company and Cabot Corporation", these arrangements will terminate upon the
spin-off. After the expiration of these various arrangements, we may not be able
to replace the interim and ongoing services on terms and conditions, including
costs, as favorable as those that we had as a division of Cabot or pursuant to
these arrangements. We also may not be able to develop the necessary systems and
infrastructure to operate as a stand-alone entity. Any failure to do so could
seriously harm our business, results of operations and financial condition.
    
 
   
BECAUSE OUR HISTORICAL FINANCIAL INFORMATION MAY NOT BE REPRESENTATIVE OF OUR
RESULTS AS A SEPARATE COMPANY, YOU HAVE LIMITED FINANCIAL INFORMATION ON WHICH
TO EVALUATE OUR BUSINESS AND YOUR INVESTMENT DECISION
    
 
   
     The historical financial information we have included in this prospectus
may not reflect what our results of operations, financial position and cash
flows would have been had we been a separate, stand-alone entity during the
periods presented and may not be indicative of what our results of operations,
financial position and cash flows will be in the future. As a result, you have
limited information on which to evaluate our business and your investment
decision. This is because:
    
 
- as a division of Cabot, Cabot provided us with various services and allocated
  expenses for these services to us in amounts that may not have been the same
  as the expenses we would have incurred had we performed or acquired these
  services ourselves;
 
   
- we are changing our fumed metal oxide supply and dispersion services
  arrangements with Cabot and the prices that we will pay under our new
  agreements will be higher than the prices we paid in the past; and
    
 
- the information does not reflect other events and changes that will occur as a
  result of our separation from Cabot, including the establishment of our
  capital structure, the incurrence of debt and changes in our expenses as a
  result of new employee, tax and other structures and matters.
 
WE HAVE A NARROW PRODUCT RANGE AND OUR PRODUCTS MAY BECOME OBSOLETE, OR
TECHNOLOGICAL CHANGES MAY REDUCE OR LIMIT INCREASES IN CMP CONSUMPTION
 
   
     Our business is substantially dependent on a single class of products, CMP
slurries, which accounted for almost all of our revenue in 1999. Our business
would suffer if these products became obsolete or if consumption of these
products decreased. Our success depends on our ability to keep pace with
    
 
                                        7

<PAGE>   9
 
technological changes and advances in the semiconductor industry and to adapt
and improve our products in response to evolving customer needs and industry
trends. Since its inception the semiconductor industry has experienced rapid
technological changes and advances in the design, manufacture, performance and
application of IC devices and these changes and advances are expected to
continue in the future. One or more developments in the semiconductor industry
may render our products obsolete or less important to the IC device
manufacturing process, including:
 
- increased competition from new or existing producers of CMP slurries,
  including the introduction of new or substitute products;
 
- a shift toward recycling slurries;
 
   
- the adoption of a new process to create the wiring in IC devices, known as
  dual damascene, which may reduce the number of CMP steps required to produce
  an IC device and which we expect will become predominant in IC device
  manufacturing in the next five to ten years; and
    
 
- advances in CMP technology that make it possible to perform CMP without a
  slurry.
 
   
There may also be physical and other limits on the ability of IC device
manufacturers to continue to shrink the size and increase the density of IC
devices, which are trends currently driving the growth in CMP. Any of the
foregoing developments could cause a decline in the CMP slurry market in general
or seriously harm our business, financial condition and results of operations in
particular.
    
 
   
A SIGNIFICANT AMOUNT OF OUR BUSINESS COMES FROM A LIMITED NUMBER OF LARGE
CUSTOMERS AND OUR REVENUE AND PROFITS COULD DECREASE SIGNIFICANTLY IF WE LOST
ONE OR MORE OF THEM AS CUSTOMERS
    
 
   
     Our customer base is concentrated among a limited number of large
customers. One or more of these principal customers may stop buying CMP slurries
from us or may substantially reduce the quantity of CMP slurries they purchase
from us. Any cancellation, deferral or significant reduction in CMP slurries
sold to these principal customers or a significant number of smaller customers
could seriously harm our business, financial condition and results of
operations.
    
 
   
     For 1999, our five largest customers accounted for approximately 58% of our
revenue, with Intel accounting for approximately 22% of our revenue, Marketech
accounting for approximately 15% of our revenue, and Takasago accounting for
approximately 10% of our revenue. Marketech and Takasago are distributors. We
believe that in the same year sales of our products to our five largest end user
customers accounted for approximately 45% of our revenue. For the three months
ended December 31, 1999, our five largest customers accounted for approximately
53% of our revenue, with Intel accounting for approximately 14% of our revenue,
Marketech accounting for approximately 15% of our revenue, and Takasago
accounting for approximately 11% of our revenue. The decline in the percentage
of our total revenue attributable to sales to Intel resulted from, among other
things, Intel's decision to significantly reduce purchases of one type of CMP
slurry from us. See "Business -- Customers, Sales and Marketing" for more
information relating to our customers.
    
 
   
IF WE LOSE PENDING OR FUTURE INTELLECTUAL PROPERTY LAWSUITS RELATING TO OUR
BUSINESS, WE COULD BE LIABLE FOR SIGNIFICANT DAMAGES AND LEGAL EXPENSES AND
COULD BE ENJOINED FROM MANUFACTURING OUR SLURRY PRODUCTS
    
 
   
     Cabot is currently the subject of two lawsuits against it involving
infringement claims relating to our business. If Cabot or we were to lose these
or future lawsuits, we could be liable for significant damages and legal
expenses and could be enjoined from manufacturing our slurry products.
    
 
   
     In June 1998, Rodel, Inc. commenced a lawsuit against Cabot in the United
States District Court for the District of Delaware seeking injunctive relief and
damages relating to allegations that Cabot is infringing a United States patent
owned by an affiliate of Rodel that relates to polishing metal surfaces. In
April 1999, Rodel commenced a second lawsuit against Cabot in the same court
seeking injunctive relief and damages relating to alle-
    
 
                                        8

<PAGE>   10
 
   
gations that Cabot is infringing two other United States patents owned by an
affiliate of Rodel. Rodel may claim that many of our products infringe its
patents. Although Cabot is the only named defendant in these lawsuits, we will
agree to indemnify Cabot for any and all losses and expenses arising out of this
litigation as well as any other litigation arising out of our business. The
defense of these claims may not be successful. If Rodel wins either of these
cases, we may have to pay damages and, in the future, may be prohibited from
producing any products found to infringe those patents or required to pay Rodel
royalty and licensing fees with respect to sales of those products. For a
further description of these lawsuits, see "Business -- Legal Proceedings".
    
 
   
     In addition, we may be subject to future infringement claims by Rodel or
others with respect to our products and processes. These claims, even if they
are without merit, could be expensive and time consuming to defend and if we
were to lose any future infringement claims we could be subject to injunctions,
damages and/or royalty or licensing agreements. Royalty or licensing agreements,
if required as a result of any pending or future claims, may not be available to
us on acceptable terms or at all.
    
 
ANY PROBLEM OR INTERRUPTION IN OUR SUPPLY FROM CABOT OF FUMED METAL OXIDES, OUR
MOST IMPORTANT RAW MATERIALS, COULD DELAY OUR SLURRY PRODUCTION AND ADVERSELY
AFFECT OUR SALES
 
   
     Fumed metal oxides are the primary raw materials we use in many of our CMP
slurries. These slurries represented approximately 97% of our revenue in 1999.
Our business would suffer from any problem or interruption in our supply of
fumed metal oxides.
    
 
     Cabot is currently our exclusive supplier of fumed metal oxides. We have
entered into a fumed metal oxide supply agreement with Cabot, which will be
effective upon completion of this offering and under which Cabot will continue
to be our exclusive supplier of fumed metal oxides for our current slurry
products. Although the agreement does not require us to purchase from Cabot
fumed metal oxides for slurry products that we develop in the future, we expect
that Cabot will be our primary supplier of fumed metal oxides for these products
as well. Over 80% of the fumed metal oxides that we currently purchase from
Cabot are manufactured at its facility in Tuscola, Illinois. Our continued
supply of fumed metal oxides from Cabot is subject to a number of risks,
including:
 
- the destruction of one of Cabot's fumed metal oxides manufacturing facilities,
  particularly its Tuscola facility, or its distribution infrastructure;
 
- a work stoppage or strike by Cabot employees who manufacture fumed metal
  oxides;
 
- the failure of Cabot to provide fumed metal oxides of the requisite quality
  for production of our various CMP slurries;
 
- the failure of essential fumed metal oxides manufacturing equipment at a Cabot
  plant;
 
- the failure or shortage of supply of raw materials to Cabot; and
 
- contractual amendments and disputes with Cabot, including those relating to
  the fumed metal oxide supply agreement.
 
   
     A significant reduction in the amount of fumed metal oxides supplied by
Cabot, a problem with the quality of those fumed metal oxides or a prolonged
interruption in their supply by Cabot could interfere with our ability to
produce our CMP slurries in the quantities and of the quality required by our
customers and in accordance with their delivery schedules. It may also be
difficult to secure alternative sources of fumed metal oxides in the event Cabot
encounters supply problems.
    
 
     Prior to introducing a new CMP slurry into its manufacturing process, an IC
device manufacturer generally requires that the slurry be qualified through a
series of tests and evaluations intended to ensure that the slurry will function
properly in the manufacturing process and to optimize its application. Our
customers would have to requalify our CMP slurries if we changed the supplier or
type of fumed metal oxides we use to make them. A
 
                                        9

<PAGE>   11
 
   
requalification might also be required if we were to purchase fumed metal oxides
from a different Cabot manufacturing facility. The requalification process would
likely take a significant amount of time to complete, during which our sales of
CMP slurries to these customers could be interrupted or reduced.
    
 
   
     We have also specifically engineered our slurry chemistries with the fumed
metal oxides currently used in the production of our CMP products. A change in
the fumed metal oxides we use to make our slurry products could require us to
modify our chemistries. This modification may involve a significant amount of
time and cost to complete.
    
 
   
     Any of these problems with, or interruptions to, our supply of fumed metal
oxides could seriously harm our business, financial condition and results of
operations.
    
 
   
OUR BUSINESS COULD BE SERIOUSLY HARMED IF OUR EXISTING OR FUTURE COMPETITORS
DEVELOP SUPERIOR SLURRY PRODUCTS OR OFFER BETTER PRICING TERMS OR SERVICE, OR IF
ANY OF OUR MAJOR CUSTOMERS DEVELOP IN-HOUSE SLURRY MANUFACTURING CAPABILITY
    
 
   
     Increased competition from current CMP slurry manufacturers, new entrants
to the CMP slurry market or a decision by any of our major customers to produce
slurry products in-house could seriously harm our business and results of
operations. We are aware of only four other manufacturers of CMP slurries
currently selling significant volumes to IC device manufacturers. Opportunities
exist for companies with sufficient financial or technological resources to
emerge as potential competitors by developing their own CMP slurry products.
Some of our major customers, and some potential customers, currently manufacture
slurries in-house and others have the financial and technological capability to
do so. The existence or threat of increased competition and in-house production
could limit or reduce the prices we are able to charge for our slurry products.
In addition, our competitors may have or obtain intellectual property rights
which may restrict our ability to market our existing products and/or to
innovate and develop new products.
    
 
OUR INABILITY TO ATTRACT AND RETAIN KEY MANAGEMENT PERSONNEL OR TECHNICAL
EMPLOYEES COULD CAUSE OUR BUSINESS TO SUFFER
 
   
     If we fail to recruit and retain the necessary management personnel, our
business and our ability to maintain existing and obtain new customers, develop
new products and provide acceptable levels of customer service could suffer. The
success of our business is also heavily dependent on the leadership of our key
management personnel, all of whom are employees-at-will. We have no key man
insurance on any of our personnel. The loss of any number of our key management
personnel could harm our business and results of operations.
    
 
   
     Our success also depends on our ability to recruit, retain and motivate
technical personnel for our research and development activities. Competition for
qualified personnel, particularly those with significant experience in the CMP
and IC device industries, is intense, and we may not be able to successfully
recruit, train or retain these employees. The loss of the services of any key
technical employee could harm our business generally as well as our ability to
research and develop new and existing products and to provide technical support
and service to our customers.
    
 
   
     After indicating his desire to leave our company in January 2000, Chris Yu,
our former Director of Research and Technology, decided to resign from that
position but to remain with our company and focus on product development of CMP
slurries for copper-based applications and technology-based applications for
customers.
    
 
   
BECAUSE WE HAVE LIMITED EXPERIENCE IN MANUFACTURING AND SELLING CMP POLISHING
PADS AND SLURRIES FOR CMP POLISHING OF THE MAGNETIC HEADS AND THE COATING ON
HARD DISKS IN HARD DISK DRIVES, EXPANSION OF OUR BUSINESS INTO THESE AREAS AND
APPLICATIONS MAY NOT BE SUCCESSFUL
    
 
   
     An element of our strategy is to leverage our current customer
relationships and technological expertise to expand our business into new
product areas and applications, including manufacturing CMP polishing pads
    
 
                                       10

<PAGE>   12
 
   
and slurries for CMP polishing of the magnetic heads and the coating on hard
disks in hard disk drives. We have had limited experience in developing and
marketing these products, particularly polishing pads, which involve
technologies and production processes that are new to us. For this reason, the
expansion of our business into these new product areas or applications may not
be successful.
    
 
   
BECAUSE WE RELY HEAVILY ON OUR INTELLECTUAL PROPERTY, OUR FAILURE TO ADEQUATELY
PROTECT IT COULD SERIOUSLY HARM OUR BUSINESS
    
 
   
     Protection of intellectual property is particularly important in our
industry because CMP slurry manufacturers develop complex and technical formulas
for CMP slurries which are proprietary in nature and differentiate their
products from those of competitors. Our intellectual property is important to
our success and ability to compete. We attempt to protect our intellectual
property rights through a combination of patent, trademark, copyright and trade
secret laws, as well as employee and third-party nondisclosure and assignment
agreements. Our failure to obtain or maintain adequate protection of our
intellectual property rights for any reason could seriously harm our business.
    
 
   
     Policing the unauthorized use of our intellectual property is difficult,
and the steps we have taken may not detect or prevent the misappropriation or
unauthorized use of our technologies. In addition, other parties may
independently develop or otherwise acquire the same or substantially equivalent
technologies to ours.
    
 
WE ARE SUBJECT TO SOME RISKS ASSOCIATED WITH OUR FOREIGN OPERATIONS
 
   
     We currently have operations and a large customer base outside the United
States. For 1999, approximately 46% of our revenue was generated by sales to
customers outside the United States. For the three months ended December 31,
1999, approximately 50% of our revenue was generated by sales to customers
outside the United States. We encounter potential risks in doing business in
foreign countries, including:
    
 
- the difficulty of enforcing agreements and collecting receivables through some
  foreign legal systems;
 
- foreign customers may have longer payment cycles than customers in the United
  States;
 
- tax rates in some foreign countries may exceed those of the United States and
  foreign earnings may be subject to withholding requirements or the imposition
  of tariffs, exchange controls or other restrictions;
 
- general economic and political conditions in the countries where we operate
  may have an adverse effect on our operations in those countries;
 
- the difficulties associated with managing a large organization spread
  throughout various countries; and
 
- the potential difficulty in enforcing intellectual property rights in some
  foreign countries.
 
   
As we continue to expand our business globally, our success will depend, in
part, on our ability to anticipate and effectively manage these and other risks.
    
 
EXCHANGE RATE FLUCTUATIONS COULD ADVERSELY AFFECT OUR FINANCIAL RESULTS
 
   
     As a result of our international operations, we expect to generate an
increasing portion of our revenue and incur a significant portion of our
expenses in currencies other than U.S. dollars. To the extent we are unable to
match revenue received in foreign currencies with costs paid in the same
currency, exchange rate fluctuations in any foreign currency could have a
negative impact on our financial condition or results of operations.
    
 
     The financial condition and results of operations of some of our operating
entities are reported in various foreign currencies and then translated into
U.S. dollars at the applicable exchange rate for inclusion in our consolidated
financial statements. As a result, appreciation of the U.S. dollar against these
 
                                       11

<PAGE>   13
 
   
foreign currencies will have a negative impact on our reported revenue and
operating profits. For information about the impact of foreign currency
translation on our financial condition, see "Management's Discussion and
Analysis of Financial Condition and Results of Operations -- Effect of Currency
Exchange Rate and Exchange Rate Risk Management" and "-- Market Risk and
Sensitivity Analysis".
    
 
   
OUR ABILITY TO RAISE CAPITAL IN THE FUTURE MAY BE LIMITED AND THIS MAY LIMIT OUR
ABILITY TO EXPAND OUR BUSINESS AND IMPROVE OUR TECHNOLOGY
    
 
   
     We plan to expand our business and continue to improve our technology. To
do so we may be required to raise additional funds in the future through public
or private equity or debt financing, strategic relationships or other
arrangements. Financing may not be available on acceptable terms, or at all, and
our failure to raise capital when needed could negatively impact our financial
condition or results of operations. Because we will agree with Cabot that we
will not issue any securities if doing so would reduce Cabot's ownership of us
to less than 80.5% prior to the spin-off, our ability to raise capital through
further sales of equity securities will be limited until the spin-off occurs.
Additional equity financing may be dilutive to the holders of our common stock
and debt financing, if available, may involve restrictive covenants. For a
discussion of our liquidity and capital resources, see "Management's Discussion
and Analysis of Financial Condition and Results of Operations -- Liquidity and
Capital Resources".
    
 
   
                  RISKS RELATING TO OUR SEPARATION FROM CABOT
    
 
WE WILL BE CONTROLLED BY CABOT AS LONG AS IT OWNS A MAJORITY OF OUR COMMON STOCK
AND OUR OTHER STOCKHOLDERS WILL BE UNABLE TO AFFECT THE OUTCOME OF STOCKHOLDER
VOTING DURING THAT TIME
 
   
     After the completion of this offering, Cabot will beneficially own
approximately 82.6% of our outstanding shares of common stock, or 80.5% if the
underwriters exercise their over-allotment option in full. Under the initial
public offering and distribution agreement, Cabot will have the right to
maintain an 80.5% ownership of our common stock until the spin-off. As long as
Cabot owns a majority of our outstanding common stock, Cabot will continue to be
able to elect our entire board of directors and generally to determine the
outcome of all corporate actions requiring stockholder approval. As a result,
Cabot will be in a position to continue to control all matters affecting our
company, including:
    
 
- a change of control of our company, including a merger;
 
- the acquisition or disposition of assets by our company;
 
- future issuances of common stock or other securities of our company;
 
- the incurrence of debt by our company;
 
- amendments, waivers and modifications to our fumed metal oxide supply
  agreement with Cabot and the other interim and ongoing agreements we have
  entered into with Cabot;
 
- the payment of dividends on our common stock; and
 
- some determinations with respect to treatment of items in our tax returns
  which are consolidated or combined with Cabot's tax returns.
 
   
     Cabot has indicated that it intends to divest its remaining equity interest
in us within six to twelve months after the date of a private letter ruling from
the IRS confirming that the spin-off is tax-free to Cabot. However, Cabot may
not complete a divestiture of its remaining equity interest in us in this time
frame or at all.
    
 
A NUMBER OF OUR DIRECTORS MAY HAVE CONFLICTS OF INTEREST BECAUSE THEY ARE ALSO
DIRECTORS OR EXECUTIVE OFFICERS OF CABOT OR OWN CABOT STOCK
 
   
     Three members of our board of directors are directors or executive officers
of Cabot. Our directors who are also directors or executive officers of Cabot
will have obligations to both companies and may have conflicts of interest with
respect to matters involving or affecting us, such as acquisitions and other
    
 
                                       12

<PAGE>   14
 
   
corporate opportunities that may be suitable for both us and Cabot. In addition,
after this offering and the spin-off, a number of our directors and executive
officers will continue to own Cabot stock and options on Cabot stock they
acquired as directors or employees of Cabot. This ownership could create, or
appear to create, potential conflicts of interest when these directors and
officers are faced with decisions that could have different implications for our
company and Cabot. While there are provisions in our certificate of
incorporation designed to resolve these conflicts between us and Cabot fairly,
these conflicts may not ultimately be resolved in a fair manner to both parties.
See "Description of Capital Stock".
    
 
   
WE MAY HAVE CONFLICTS WITH CABOT WITH RESPECT TO OUR PAST AND ONGOING
RELATIONSHIPS
    
 
   
     We may have conflicts with Cabot after this offering that we cannot resolve
and, even if we are able to do so, the resolution of these conflicts may not be
as favorable as if we were dealing with an unaffiliated party. Upon the
completion of this offering, Cabot will continue to be our exclusive supplier of
fumed metal oxides for our existing slurries under a fumed metal oxide supply
agreement between Cabot and our company. While we are not required to do so
under the terms of that agreement, we expect we also will purchase from Cabot
most of the fumed metal oxides we require for any new slurries we develop.
Furthermore, we currently have and, after this offering and the spin-off will
continue to have, contractual arrangements with Cabot requiring Cabot and its
affiliates to provide us with various interim, ongoing and other services. As a
result, conflicts of interest may arise between Cabot and us in a number of
areas relating to our past and ongoing relationships, including:
    
 
- the terms of our fumed metal oxide supply agreement and other interim and
  ongoing agreements with Cabot;
 
- Cabot's ability to control our management and affairs;
 
- the nature, quality and pricing of transitional services Cabot has agreed to
  provide us;
 
- business opportunities that may be attractive to both Cabot and us;
 
- litigation, labor, tax, employee benefit and other matters arising from our
  separation from Cabot;
 
- the incurrence of debt and major business combinations by us; and
 
- sales or distributions by Cabot of all or any portion of its ownership
  interest in us.
 
   
     In addition, the contractual agreements we have with Cabot may be amended
from time to time upon agreement between the parties and, as long as Cabot is
our controlling stockholder, it will have the ability to require us to agree to
any such amendments. These agreements were made in the context of an affiliated
relationship and were negotiated in the overall context of our separation from
Cabot. The prices and other terms under these agreements may be less favorable
to us than what we could have obtained in arm's-length negotiations with
unaffiliated third parties for similar services or under similar leases. It is
particularly difficult to assess whether the price for fumed metal oxides
provided for under our fumed metal oxide supply agreement with Cabot is the same
as or different than the price we could have obtained in arm's-length
negotiations with an unaffiliated third party in light of the long-term nature
of the contract, the volumes provided for under the agreement and our particular
quality requirements. For more information about these arrangements, see
"Business -- Cabot as Our Raw Materials Supplier", "Business -- Dispersion
Services Agreement with Cabot" and "Relationships Between Our Company and Cabot
Corporation".
    
 
WE FACE RISKS ASSOCIATED WITH BEING A MEMBER OF CABOT'S CONSOLIDATED GROUP FOR
FEDERAL INCOME TAX PURPOSES
 
   
     For so long as Cabot continues to own 80% of the vote and value of our
capital stock, we will be included in Cabot's consolidated group for federal
income tax purposes. Under a tax sharing agreement with Cabot that will become
effective upon completion of this offering, we will pay Cabot the amount of
    
 
                                       13

<PAGE>   15
 
federal, state and local income taxes that we would be required to pay to the
relevant taxing authorities if we were a separate taxpayer not included in
Cabot's consolidated or combined returns. In addition, by virtue of its
controlling ownership and the tax sharing agreement, Cabot will effectively
control substantially all of our tax decisions. Under the tax sharing agreement,
Cabot will have sole authority to respond to and conduct all tax proceedings
including tax audits relating to Cabot consolidated or combined income tax
returns in which we are included. Moreover, notwithstanding the tax sharing
agreement, federal law provides that each member of a consolidated group is
liable for the group's entire tax obligation. Thus, to the extent Cabot or other
members of the group fail to make any federal income tax payments required of
them by law, we could be liable for the shortfall. Similar principles may apply
for state income tax purposes in many states.
 
   
IF THE ANTICIPATED SPIN-OFF IS NOT TAX-FREE, WE COULD BE LIABLE TO CABOT FOR THE
RESULTING TAXES
    
 
   
     As described above under "Prospectus Summary -- Relationship with Cabot
Corporation", we will, after this offering, continue to be controlled by Cabot
and Cabot intends to divest itself of its remaining equity interest in us by
means of a tax-free spin-off. We will agree to indemnify Cabot in the event that
the spin-off is not tax-free to Cabot as a result of various actions taken by or
with respect to us or our failure to take various actions, all as to be set
forth in our tax sharing agreement with Cabot. We may not be able to control
some of the events that could trigger this liability. In particular, any
acquisition of us by a third party within two years of the spin-off could result
in the spin-off becoming a taxable transaction and give rise to our obligation
to indemnify Cabot for any resulting tax liability.
    
 
                        RISKS RELATING TO THIS OFFERING
 
SINCE OUR COMMON STOCK HAS NOT TRADED PUBLICLY, THE INITIAL PUBLIC OFFERING
PRICE MAY NOT BE INDICATIVE OF THE MARKET PRICE OF OUR COMMON STOCK AFTER THIS
OFFERING, AND THE MARKET PRICE OF OUR COMMON STOCK MAY FLUCTUATE WIDELY AND
RAPIDLY
 
   
     There is currently no public market for our common stock, and an active
trading market may not develop or be sustained after this offering. The initial
public offering price has been determined through negotiation between us and
representatives of the underwriters and may not be indicative of the market
price for our common stock after this offering.
    
 
     The market price of our common stock could fluctuate significantly as a
result of:
 
- economic and stock market conditions generally and specifically as they may
  impact participants in the semiconductor industry;
 
- changes in financial estimates and recommendations by securities analysts
  following our stock;
 
- earnings and other announcements by, and changes in market evaluations of,
  participants in the semiconductor industry;
 
- changes in business or regulatory conditions affecting participants in the
  semiconductor industry;
 
- announcements or implementation by us or our competitors of technological
  innovations or new products; and
 
- trading volume of our common stock.
 
     The securities of many companies have experienced extreme price and volume
fluctuations in recent years, often unrelated to the companies' operating
performance. Specifically, market prices for securities of technology related
companies have frequently reached elevated levels, often following their initial
public offerings. These levels may not be sustainable and may not bear any
relationship to these companies' operating performances. If the market price of
our common stock reaches an elevated level following this offering, it may
materially and rapidly decline. In the past, following periods of volatility in
 
                                       14

<PAGE>   16
 
   
the market price of a company's securities, stockholders have often instituted
securities class action litigation against the company. If we were involved in a
class action suit, it could divert the attention of senior management, and, if
adversely determined, have a negative impact on our business, results of
operations and financial condition.
    
 
   
THE ACTUAL OR POSSIBLE SALE OF OUR SHARES BY CABOT, WHICH WILL OWN MORE THAN 80%
OF OUR OUTSTANDING SHARES, COULD DEPRESS OR REDUCE THE MARKET PRICE OF OUR
COMMON STOCK OR CAUSE OUR SHARES TO TRADE BELOW THE PRICES AT WHICH THEY WOULD
OTHERWISE TRADE
    
 
     The market price of our common stock could drop as a result of sales of a
large number of shares of our common stock in the market after this offering or
the perception that these sales could occur. These factors also could make it
more difficult for us to raise funds through future offerings of our common
stock.
 
   
     Upon the completion of this offering, there will be 22,989,744 shares of
our common stock outstanding, assuming the underwriters do not exercise their
option to purchase additional shares from us. Based on the same assumption,
after this offering Cabot will beneficially own 82.6% of our outstanding common
stock. The shares of our common stock sold in this offering will be freely
tradable without restriction, except for any shares acquired by an affiliate of
our company (which can be sold under Rule 144 under the Securities Act, subject
to various volume and other limitations). Cabot is not obligated to retain these
shares, except that subject to limited exceptions, it has agreed not to sell or
otherwise dispose of any shares of common stock for 180 days after the
completion of this offering without the consent of our underwriters. After the
expiration of this 180 day period, Cabot could dispose of its shares of our
common stock through a public offering, spin-off or other transaction and has
indicated its intention to do so through a spin-off.
    
 
   
ANTI-TAKEOVER PROVISIONS OF DELAWARE'S GENERAL CORPORATION LAW AND OUR
CERTIFICATE OF INCORPORATION AND BYLAWS, AS WELL AS OUR RIGHTS PLAN, COULD DELAY
OR DETER A CHANGE IN CONTROL OF OUR COMPANY
    
 
   
     Amendments we intend to make to our certificate of incorporation and our
bylaws, as well as our rights plan and various provisions of the Delaware
General Corporation Law, may make it more difficult to effect a change in
control of our company. These amendments, our rights plan and the various
provisions of Delaware General Corporate Law may adversely affect the price of
our common stock, discourage third parties from making a bid for our company or
reduce any premiums paid to our stockholders for their common stock. For
example, we intend to amend our certificate of incorporation to authorize our
board of directors to issue up to 20 million shares of blank check preferred
stock and to attach special rights and preferences to this preferred stock. The
issuance of this preferred stock may make it more difficult for a third party to
acquire control of us. We also intend to amend our certificate of incorporation
to provide for the division of our board of directors into three classes as
nearly equal in size as possible with staggered three-year terms. This
classification of our board of directors could have the effect of making it more
difficult for a third party to acquire our company, or of discouraging a third
party from acquiring control of our company. In addition, the rights issued to
our stockholders under our rights plan may make it more difficult or expensive
for another person or entity to acquire control of us without the consent of our
board of directors. See "Description of Capital Stock -- Preferred Stock",
"-- Anti-takeover Effects of Our Certificate of Incorporation and Bylaws and
Provisions of Delaware Law" and "-- Rights Plan" for a more complete description
of our capital stock, our certificate of incorporation, our rights plan and the
effects of the Delaware General Corporation Law that could hinder a third
party's attempts to acquire control of us.
    
 
                                       15

<PAGE>   17
 
   
INVESTORS IN THIS OFFERING WILL EXPERIENCE IMMEDIATE AND SUBSTANTIAL DILUTION
    
 
   
     If you purchase common stock in this offering, you will pay more for your
shares than the amounts paid by Cabot for its shares. As a result, you will
experience immediate and substantial dilution of approximately $13.58 per share,
representing the difference between the assumed initial public offering price of
$16.00 per share and our net tangible book value per share as of December 31,
1999 after giving effect to this offering. In addition, you may experience
further dilution to the extent that shares of our common stock are issued upon
the exercise of stock options or under our employee stock purchase plan. The
shares initially issuable under our employee stock purchase plan will be issued
at a purchase price less than the public offering price per share in this
offering. In addition, some of the stock options we may issue in the future may
have exercise prices below the initial public offering price. See "Dilution" for
a more complete description of how the value of your investment in our common
stock will be diluted upon the completion of this offering.
    
 

                                USE OF PROCEEDS
 
   
     We estimate the net proceeds from our sale of 4,000,000 shares of common
stock will be $57.2 million, after deducting the underwriting discount and
estimated expenses of this offering and of the asset transfer. If the
underwriters' over-allotment option is exercised in full, we estimate the net
proceeds will be $66.1 million.
    
 
   
     We intend to use all of the net proceeds from this offering to pay a
dividend to Cabot in an amount equal to the lesser of the amount of the net
proceeds and Cabot's tax basis in us as of the completion of this offering. Any
net proceeds not used for this purpose will be used for general working capital
purposes.
    
 

                                DIVIDEND POLICY
 
   
     Except for the $17.0 million dividend that we expect to pay to Cabot prior
to the completion of this offering using borrowings under our term credit
facility and the dividend that we expect to pay to Cabot immediately following
the completion of this offering, we have never declared or paid any cash
dividends on our capital stock. We presently intend to retain future earnings,
if any, to finance the expansion of our business and do not expect to pay any
cash dividends in the foreseeable future. Payment of future cash dividends, if
any, will be at the discretion of our board of directors after taking into
account various factors, including our financial condition, operating results,
current and anticipated cash needs and plans for expansion.
    
 
                                       16

<PAGE>   18
 

                                 CAPITALIZATION
 
   
     Prior to the completion of this offering, we expect to borrow $17.0 million
under our new term credit facility and to pay the proceeds of this borrowing to
Cabot as a dividend. We also intend to pay a subsequent dividend to Cabot at the
completion of this offering in an amount equal to the lesser of the net proceeds
of this offering and Cabot's estimated tax basis in us as of the completion
date.
    
 
   
     Cabot's estimated tax basis in us was approximately $69.0 million at
December 31, 1999. This estimated tax basis is expected to increase as a result
of our earnings and any capital contributions made by Cabot after December 31,
1999 and will decrease by the $17.0 million that we will pay to Cabot as a
dividend from borrowings under our term credit facility. After payment of this
dividend, Cabot estimates that its tax basis in us as of the completion date
will be approximately $64.0 million.
    
 
   
     The following table sets forth, as of December 31, 1999, our capitalization
on an actual basis and on a pro forma as adjusted basis to give effect to:
    
 
   
- our borrowing of $17.0 million under our term credit facility;
    
 
   
- our payment to Cabot of a cash dividend of $17.0 million from the borrowing
  under our term credit facility;
    
 
   
- our receipt of net proceeds from this offering equal to $57.2 million, which
  is based on an assumed initial public offering price of $16.00 per share,
  estimated underwriting discounts and expenses of $6.8 million and the
  assumption that the underwriters do not exercise their option to acquire
  additional shares from us;
    
 
   
- our payment to Cabot of a cash dividend of $52.0 million, which represents
  Cabot's estimated tax basis in us at December 31, 1999 ($69.0 million) minus
  the $17.0 million dividend we intend to pay to Cabot from the borrowing under
  our term credit facility; and
    
   
- the retention by Cabot of the fumed alumina plant in Tuscola, Illinois and the
  real property, building and other improvements and fixtures in Barry, Wales
  (the total value of all of these assets was approximately $3.8 million at
  December 31, 1999).
    
 
   
     The foregoing adjustments are based on Cabot's estimated tax basis in us at
December 31, 1999 of $69.0 million. While we expect that Cabot's estimated tax
basis in us will increase prior to the completion date of this offering as a
result of our earnings and any capital contributions made by Cabot after
December 31, 1999, these earnings and capital contributions will increase our
Division equity by about the same amount. As noted above, Cabot estimates that
its tax basis in us as of the completion date after payment of the $17.0 million
dividend referred to above will be approximately $64.0 million. If we had used
this estimated tax basis in the foregoing adjustments, then the amount of the
second dividend to Cabot would have been $57.2 million, the total assumed net
proceeds of this offering (because they are less than the $64.0 million
estimated tax basis).
    
 
     This table should be read in conjunction with "Selected Financial Data",
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and our combined financial statements and the notes to our combined
financial statements, each of which is included in this prospectus.
 
   

<TABLE>
<CAPTION>
                                                              AS OF DECEMBER 31, 1999
                                                              ------------------------
                                                                           PRO FORMA
                                                               ACTUAL     AS ADJUSTED
                                                               ------     -----------
                                                                   (in thousands)
<S>                                                           <C>         <C>
Total long term debt, less current portion of $1,013........       --        15,987
Division equity.............................................   75,056        59,456
                                                              -------       -------
          Total capitalization..............................  $75,056       $75,443
                                                              =======       =======
</TABLE>

    
 
                                       17

<PAGE>   19
 
                                    DILUTION
 
   
     Our net tangible book value as of December 31, 1999 was approximately $71.2
million, or $3.75 per share. Net tangible book value per share is equal to our
total tangible assets minus our total liabilities divided by the number of
shares of our common stock outstanding. Assuming we had sold the 4,000,000
shares of common stock offered by this prospectus at an assumed initial public
offering price of $16.00 per share, and after deducting discounts and
commissions and estimated offering expenses payable by us and the two dividend
payments to Cabot referred to above under "Capitalization" totaling $69.0
million, our pro forma net tangible book value at December 31, 1999 would have
been approximately $55.6 million, or $2.42 per share. This represents an
immediate decrease in net tangible book value of $1.33 per share to Cabot and an
immediate dilution of $13.58 per share to new investors. Dilution is determined
by subtracting net tangible book value per share after the offering from the
amount of cash paid by a new investor for a share of common stock. The following
table illustrates the substantial and immediate per share dilution to new
investors:
    
 
   

<TABLE>
<CAPTION>
                                                                 PER SHARE
                                                              ----------------
<S>                                                           <C>       <C>
Assumed initial public offering price.......................            $16.00
  Net tangible book value as of December 31, 1999...........  $ 3.75
  Dividend payments to Cabot................................   (3.63)
  Increase in pro forma net tangible book value attributable
     to new investors.......................................    2.30
                                                              ------
Pro forma net tangible book value after this offering.......              2.42
                                                                        ------
Dilution to new investors...................................            $13.58
                                                                        ======
</TABLE>

    
 
   
     The following table summarizes as of December 31, 1999 the number of shares
of common stock purchased from us, the total consideration paid to us and the
average price per share paid by Cabot and by new investors at an assumed initial
public offering price of $16.00 per share and without giving effect to the
underwriting discount and assumed offering expenses:
    
 
   

<TABLE>
<CAPTION>
                                  SHARES PURCHASED        TOTAL CONSIDERATION
                                ---------------------    ----------------------    AVERAGE PRICE
                                  NUMBER      PERCENT      AMOUNT       PERCENT      PER SHARE
                                  ------      -------      ------       -------    -------------
<S>                             <C>           <C>        <C>            <C>        <C>
Existing stockholders.........  18,989,744      82.6%    $ 7,070,000       9.9%       $ 0.37
New investors.................   4,000,000      17.4      64,000,000      90.1         16.00
                                ----------     -----     -----------    ------
  Total.......................  22,989,744     100.0%    $71,070,000     100.0%
                                ==========     =====     ===========    ======
</TABLE>

    
 
   
     If the underwriters exercise their over-allotment option in full, the net
tangible book value per share of common stock as of December 31, 1999 would have
been $2.73 per share, which would result in dilution to the new investors of
$13.27 per share, and the number of shares held by the new investors will
increase to 4,600,000, or 19.5% of the total number of shares to be outstanding
after this offering, and the number of shares held by Cabot will be 18,989,744
shares, or 80.5% of the total number of shares to be outstanding after this
offering.
    
 
                                       18

<PAGE>   20
 
                            SELECTED FINANCIAL DATA
 
   
     The following selected financial data should be read in conjunction with,
and are qualified by reference to, "Management's Discussion and Analysis of
Financial Condition and Results of Operations" and our combined financial
statements and the notes to our combined financial statements, each of which is
included elsewhere in this prospectus. The selected financial data presented is
for the five-year period ended September 30, 1999 and for the three months ended
December 31, 1998 and 1999. The statement of operations data for the fiscal
years ended September 30, 1997, 1998 and 1999 and the balance sheet data as of
September 30, 1998 and 1999 are derived from our combined financial statements,
which have been audited by PricewaterhouseCoopers LLP, independent public
accountants, and are included elsewhere in this prospectus. The statement of
operations data for the fiscal years ended September 30, 1995 and 1996 and the
balance sheet information as of September 30, 1995, 1996 and 1997 are derived
from our unaudited combined financial statements, which are not included in this
prospectus. The statements of operations data for the three months ended
December 31, 1998 and 1999 and the balance sheet information as of December 31,
1999 are derived from our unaudited financial statements, which are included
elsewhere in this prospectus. Because we began to operate as a separate division
of Cabot in July 1995, the statement of operations data for 1995 includes only
three months of activity.
    
 
   
     The unaudited interim financial information for the three months ended
December 31, 1998 and 1999 has been prepared on the same basis as the annual
financial statements and includes all adjustments, consisting only of normal
recurring adjustments, which management considers necessary for the fair
presentation of that financial information. The unaudited results for interim
periods are not necessarily indicative of results to be expected for any other
interim period or the full year.
    
 
   
     Unaudited pro forma net income per share has been calculated using the
18,989,744 shares that will be owned by Cabot at the completion of this offering
and the number of shares that we would have been required to issue to fund a
dividend to Cabot in an amount equal to Cabot's tax basis in us at each period
end minus the earnings from that period at an issue price per share equal to
$14.30, which is the assumed initial public offering price of $16.00 per share
less the estimated underwriting discounts and offering expenses.
    
 
     An income tax benefit was recorded in 1997 as a result of a tax credit for
research and development activities that exceeded our statutory taxes for that
period.
 
                                       19

<PAGE>   21
 
   

<TABLE>
<CAPTION>
                                                                                                 THREE MONTHS
                                     THREE MONTHS                                                    ENDED
                                         ENDED              YEAR ENDED SEPTEMBER 30,             DECEMBER 31,
                                     SEPTEMBER 30,   ---------------------------------------   -----------------
                                         1995         1996        1997      1998      1999      1998      1999
                                     -------------   -------     -------   -------   -------   -------   -------
                                                        (in thousands, except per share data)
<S>                                  <C>             <C>         <C>       <C>       <C>       <C>       <C>
COMBINED STATEMENT OF OPERATIONS
  DATA:
Revenue -- external................     $4,242       $23,373     $33,851   $56,862   $95,701   $20,325   $34,230
Revenue -- related party...........        761           961       1,360     1,969     2,989       550       816
                                        ------       -------     -------   -------   -------   -------   -------
Total revenue......................      5,003        24,334      35,211    58,831    98,690    20,875    35,046
                                        ------       -------     -------   -------   -------   -------   -------
Cost of goods sold -- external.....      2,264        12,386      18,561    27,686    44,902     9,486    15,372
Cost of goods sold -- related
  party............................        761           961       1,360     1,969     2,989       550       816
                                        ------       -------     -------   -------   -------   -------   -------
Total cost of goods sold...........      3,025        13,347      19,921    29,655    47,891    10,036    16,188
                                        ------       -------     -------   -------   -------   -------   -------
    Gross profit...................      1,978        10,987      15,290    29,176    50,799    10,839    18,858
Operating expenses:
  Research and development.........         27         6,984       8,411    10,139    14,551     3,445     4,484
  Selling and marketing............        591           674       1,028     3,293     4,572       954     1,250
  General and administrative.......        604         4,122       4,468     8,576    11,880     2,570     3,896
  Amortization of goodwill and
    other intangibles..............        179           720         720       720       720       180       180
                                        ------       -------     -------   -------   -------   -------   -------
    Total operating expenses.......      1,401        12,500      14,627    22,728    31,723     7,149     9,810
                                        ------       -------     -------   -------   -------   -------   -------
Income (loss) before income
  taxes............................        577        (1,513)        663     6,448    19,076     3,690     9,048
Provision for (benefit from) income
  taxes............................        222          (647)        (45)    2,211     6,796     1,313     3,300
                                        ------       -------     -------   -------   -------   -------   -------
    Net income (loss)..............     $  355       $  (866)    $   708   $ 4,237   $12,280   $ 2,377   $ 5,748
                                        ======       =======     =======   =======   =======   =======   =======
Unaudited pro forma net income per
  share............................                                                  $  0.58             $  0.26
                                                                                     =======             =======
Unaudited pro forma shares
  outstanding......................                                                   21,126              22,224
                                                                                     =======             =======
</TABLE>

    
 
   

<TABLE>
<CAPTION>
                                                                                      AS OF DECEMBER 31,
                                                AS OF SEPTEMBER 30,                 -----------------------
                                  -----------------------------------------------                 PRO FORMA
                                   1995      1996      1997      1998      1999        1999         1999
                                   ----      ----      ----      ----      ----        ----       ---------
                                                               (in thousands)
<S>                               <C>       <C>       <C>       <C>       <C>       <C>           <C>
COMBINED BALANCE SHEET DATA:
Current assets..................  $ 3,957   $ 5,817   $ 8,781   $15,581   $26,120     $32,695      $32,695
Property, plant and equipment,
  net...........................    4,045    16,797    17,195    24,713    40,031      46,400       42,600
Other assets....................    6,928     6,284     5,547     4,837     4,123       3,891        3,891
                                  -------   -------   -------   -------   -------     -------      -------
Total assets....................  $14,930   $28,898   $31,523   $45,131   $70,274     $82,986      $79,186
                                  =======   =======   =======   =======   =======     =======      =======
Current liabilities.............  $   651   $ 2,649   $ 2,980   $ 4,870   $ 7,775     $ 7,402      $76,402
Long-term liabilities...........       61        40       119       233       422         528          528
                                  -------   -------   -------   -------   -------     -------      -------
Total liabilities...............      712     2,689     3,099     5,103     8,197       7,930       76,930
Division equity.................   14,218    26,209    28,424    40,028    62,077      75,056        2,256
                                  -------   -------   -------   -------   -------     -------      -------
Total liabilities and division
  equity........................  $14,930   $28,898   $31,523   $45,131   $70,274     $82,986      $79,186
                                  =======   =======   =======   =======   =======     =======      =======
</TABLE>

    
 
                                       20

<PAGE>   22
 
   
               UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME
    
 
   
     The following unaudited pro forma combined statements of income have been
prepared to reflect adjustments to our historical results of operations to give
effect to various transactions as if those transactions had been consummated at
earlier dates, as described in this prospectus.
    
 
   
     We historically sold various dispersion products to Cabot at our cost of
manufacturing. We have entered into a new dispersion services agreement with
Cabot, which will become effective upon the completion of this offering, under
which we will provide dispersion products to Cabot at our cost plus a standard
margin. Under the new agreement, Cabot will supply us with the fumed metal oxide
raw materials for these dispersions at no cost to us, which will reduce both our
cost of goods sold and revenue for these dispersions. The unaudited pro forma
combined statements of income have been adjusted to reflect the reduction in
revenue and related cost of goods sold which would have resulted had the
dispersion services agreement been in effect for the year ended September 30,
1999.
    
 
   
     We historically purchased fumed metal oxides, critical raw materials for
our slurries, from Cabot at Cabot's budgeted standard cost. We have entered into
a new fumed metal oxide supply agreement with Cabot which will become effective
upon the completion of this offering under which we will purchase fumed metal
oxides at a contractually agreed upon price. The agreement provides for fixed
price increases each year and other price increases if Cabot's cost of producing
fumed metal oxides increases. The unaudited pro forma combined statements of
income have been adjusted to reflect the additional costs that we would have
incurred based on the initial contractual price if the fumed metal oxide supply
agreement had been in effect for the year ended September 30, 1999.
    
 
   
     The unaudited pro forma combined statements of income should be read in
connection with, and are qualified by reference to, our combined financial
statements and related notes, as well as "Management's Discussion and Analysis
of Financial Condition and Results of Operations", included elsewhere in this
prospectus. We believe that the assumptions used provide a reasonable basis for
presenting the significant effects directly attributable to the transactions
discussed above. The unaudited pro forma combined statements of income are not
necessarily indicative of the results that would have been reported had such
events actually occurred on the dates specified, nor are they indicative of our
future results.
    
 
                                       21

<PAGE>   23
 
   

<TABLE>
<CAPTION>
                                                              FOR THE THREE MONTHS ENDED
                                                                  DECEMBER 31, 1999
                                                       ----------------------------------------
                                                                      PRO FORMA
                                                       HISTORICAL    ADJUSTMENTS      PRO FORMA
                                                       ----------    -----------      ---------
                                                        (in thousands, except per share data)
                                                                     (unaudited)
<S>                                                    <C>           <C>              <C>
Revenue -- external..................................   $34,230        $    --         $34,230
Revenue -- related party.............................       816           (242)(a)         574
                                                        -------        -------         -------
Total revenue........................................    35,046           (242)         34,804
                                                        -------        -------         -------
 
Cost of goods sold -- external.......................    15,372          1,388(b)       16,760
Cost of goods sold -- related party..................       816           (326)(a)         490
                                                        -------        -------         -------
Total cost of goods sold.............................    16,188          1,062          17,250
                                                        -------        -------         -------
     Gross profit....................................    18,858         (1,304)         17,554
Operating expenses:
  Research and development...........................     4,484                          4,484
  Selling and marketing..............................     1,250                          1,250
  General and administrative.........................     3,896             --(c)        3,896
  Amortization of goodwill and other intangibles.....       180                            180
                                                        -------                        -------
     Total operating expenses........................     9,810                          9,810
                                                        -------        -------         -------
Operating income.....................................     9,048         (1,304)          7,744
Interest expense.....................................        --           (316)(d)        (316)
                                                        -------        -------
Income before income taxes...........................     9,048        (1,620)           7,428
Provision for income taxes...........................     3,300           (591)(e)       2,709
                                                        -------        -------         -------
     Net income......................................   $ 5,748        (1,029)         $ 4,719
                                                        =======        =======         =======
Pro forma net income per share(f)....................   $  0.26                        $  0.21
                                                        =======                        =======
Pro forma weighted average shares outstanding(f).....    22,224                         22,224
                                                        =======                        =======
</TABLE>

    
 
                                       22

<PAGE>   24
 
   

<TABLE>
<CAPTION>
                                                  FOR THE YEAR ENDED SEPTEMBER 30, 1999
                                                 ----------------------------------------
                                                                PRO FORMA
                                                 HISTORICAL    ADJUSTMENTS      PRO FORMA
                                                 ----------    -----------      ---------
                                                  (in thousands, except per share data)
                                                               (unaudited)
<S>                                              <C>           <C>              <C>
Revenue -- external............................   $95,701       $     --         $95,701
Revenue -- related party.......................     2,989           (995)(a)       1,994
                                                  -------       --------         -------
Total revenue..................................    98,690           (995)         97,695
                                                  -------       --------         -------
Cost of goods sold -- external.................    44,902          5,925(b)       50,827
Cost of goods sold -- related party............     2,989         (1,344)(a)       1,645
                                                  -------       --------         -------
Total cost of goods sold.......................    47,891          4,581          52,472
                                                  -------       --------         -------
     Gross profit..............................    50,799         (5,576)         45,223
Operating expenses:
  Research and development.....................    14,551                         14,551
  Selling and marketing........................     4,572                          4,572
  General and administrative...................    11,880             --(c)       11,880
  Amortization of goodwill and other
     intangibles...............................       720                            720
                                                  -------                        -------
     Total operating expenses..................    31,723                         31,723
                                                  -------       --------         -------
Operating income...............................    19,076         (5,576)         13,500
Interest expense...............................        --         (1,213)(d)      (1,213)
                                                  -------       --------         -------
Income before income taxes.....................    19,076         (6,789)         12,287
Provision for income taxes.....................     6,796         (2,419)(e)       4,377
                                                  -------       --------         -------
     Net income................................   $12,280       $ (4,370)        $ 7,910
                                                  =======       ========         =======
Pro forma net income per share(f)..............   $  0.58                        $  0.37
                                                  =======                        =======
Pro forma weighted average shares
  outstanding(f)...............................    21,126                         21,126
                                                  =======                        =======
</TABLE>

    
 
                                       23

<PAGE>   25
 
   
           NOTES TO UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME
    
   
                 (dollars in thousands, except per share data)
    
 
   
(a) Reflects the reduction in revenue and related cost of goods sold which would
    have resulted if our new dispersion services agreement had been in effect
    for the year ended September 30, 1999 and the three months ended December
    31, 1999. Upon completion of this offering, a new dispersion services
    agreement will be in effect under which we will sell various dispersion
    products to Cabot at our cost plus an agreed upon margin. We have
    historically sold these dispersion products to Cabot at cost. In addition,
    we have historically purchased from Cabot the fumed metal oxide raw
    materials we use to produce these dispersion products. Under the new
    agreement, Cabot will supply us with these fumed metal oxide raw materials
    at no cost to us. The pro forma effect of receiving these fumed metal oxide
    raw materials at no cost to us decreases related party revenue and related
    party cost of goods sold by $1,344 for the year ended September 30, 1999 and
    $326 for the three months ended December 31, 1999. The pro forma effect of
    selling products at our cost plus an agreed upon margin increases related
    party revenue and gross profit by $349 for the year ended September 30, 1999
    and $84 for the three months ended December 31, 1999.
    
 
   
(b) Reflects the additional costs that would have been incurred if our new fumed
    metal oxide supply agreement with Cabot had been in effect for the year
    ended September 30, 1999 and the three months ended December 31, 1999. We
    have historically purchased fumed metal oxides, our primary raw materials
    for CMP slurries, from Cabot at Cabot's budgeted standard cost. Upon the
    completion of this offering, a new fumed metal oxide supply agreement will
    be in effect with Cabot under which we will purchase fumed metal oxides at
    contractually agreed upon prices, which are higher than prices we
    historically paid and which will increase over the term of this agreement.
    
 
   
(c) We have operated as a wholly owned subsidiary of Cabot and as a result have
    not incurred all costs necessary to operate on a stand-alone basis. While we
    believe that our general and administrative costs could increase as a result
    of being a stand-alone entity primarily for incremental legal, audit, risk
    management and administrative costs, we are unable to quantify the potential
    increase but do not expect it to be material.
    
 
   
(d) Reflects the interest expense associated with $17,000 in borrowings we
    expect to incur to finance the dividend to Cabot. Under the facilities lease
    arrangements expected to be entered into between Cabot and us, we are
    expected to incur approximately $2,200 in capital lease obligations which
    would result in additional interest expense. As this agreement has not been
    finalized and signed, the pro forma effect on interest expense has not been
    considered.
    
 
   
(e) The effective tax rate derived from our income tax expense for the year
    ended September 30, 1999 and three months ended December 31, 1999 were
    applied to the pro forma adjustments to determine the income tax expense or
    benefit associated with pro forma adjustments.
    
 
   
(f) Unaudited pro forma net income per share has been calculated using the
    18,989,744 shares that will be owned by Cabot at the completion of this
    offering and the number of shares that we would have been required to issue
    to fund a dividend to Cabot in an amount equal to Cabot's tax basis in us at
    each period end minus the earnings from that period at an issue price per
    share equal to $14.30, which is the assumed initial public offering price of
    $16.00 per share less the estimated underwriting discounts and offering
    expenses.
    
 
                                       24

<PAGE>   26
 

                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
   
     The following discussion and analysis should be read in conjunction with
our historical combined financial statements and the notes to those financial
statements and our unaudited pro forma combined statement of income, which are
included in this prospectus. This prospectus contains forward-looking statements
relating to future events and our future financial performance. Actual results
could be significantly different from those discussed in this prospectus.
Factors that could cause or contribute to such differences include those set
forth in the section entitled "Risk Factors".
    
 
                                    OVERVIEW
 
   
     We develop, manufacture and supply CMP slurries to the semiconductor
industry. Our revenue consists of:
    
 
   
-  external sales of CMP slurries; and
    
 
   
-  related party revenue from fumed metal oxide dispersions sold to Cabot.
    
 
   
We derive substantially all of our revenue from external sales of CMP slurries.
These sales accounted for more than 96% of our total revenue in each of the
three years ended September 30, 1999 and for the three months ended December 31,
1999. We recognize revenue and accrue for anticipated warranty costs upon
delivery of products.
    
 
   
     The primary factors affecting our revenue are sales volumes, average
selling prices and foreign currency effects. In recent years, sales volumes have
been positively impacted by the growth of the semiconductor industry, increased
demand for smaller, faster and more complex IC devices, pressure on IC device
manufacturers to reduce costs and successful new product introductions.
    
 
   
     For 1999, our five largest customers accounted for approximately 58% of our
revenue, with Intel accounting for approximately 22% of our revenue, Marketech
accounting for approximately 15% of our revenue, and Takasago accounting for
approximately 10% of our revenue. Marketech and Takasago are distributors. For
the three months ended December 31, 1999, our five largest customers accounted
for approximately 53% of our revenue, with Intel accounting for approximately
14% of our revenue, Marketech accounting for approximately 15% of our revenue,
and Takasago accounting for approximately 11% of our revenue. The decline in the
percentage of our total revenue attributable to sales to Intel resulted from,
among other things, Intel's decision to significantly reduce purchases of one
type of CMP slurry from us. We believe that in the same year sales of our
products to our five largest end user customers accounted for approximately 45%
of our revenue.
    
 
   
     A portion of our revenue is derived from sales in international markets.
Revenue from sales in Europe was 10% of our total revenue for the three months
ended December 31, 1999, 10% of our total revenue in 1999, 8% of our total
revenue in 1998 and 6% of our total revenue in 1997. Revenue from sales in Asia
was 40% of our total revenue for the three months ended December 31, 1999, 35%
of our total revenue in 1999, 23% of our total revenue in 1998 and 17% of our
total revenue in 1997. We expect our sales in Asia to continue to increase
significantly in the future as IC device manufacturers increase production in
Asia and we increase our marketing and distribution capabilities there. We
intend to use our Geino, Japan facility to support these sales.
    
 
   
     Our revenue from Cabot was $0.8 million for the three months ended December
31, 1999, $3.0 million in 1999, $2.0 million in 1998 and $1.4 million in 1997.
In the past we sold fumed metal oxide dispersions to Cabot on a cost basis which
included the cost of the fumed metal oxide raw materials we purchased from
Cabot. We have entered into a new dispersion services agreement with Cabot which
will be effective upon the completion of this offering. Under the new agreement
with Cabot, Cabot will supply the fumed metal oxide raw materials for these
dispersions to us at no cost. Because the cost of the fumed metal oxide raw
materials will not be included in our cost of goods sold, it will also not be
included in the price we charge to Cabot for our dispersion services. Conse-
    
 
                                       25

<PAGE>   27
 
quently, we expect our revenue from Cabot and our cost of goods sold
attributable to this revenue to decrease in the future.
 
   
     Fumed metal oxides are the primary raw materials used in the manufacture of
most of our CMP slurries and account for a significant portion of our cost of
goods sold. We have entered into a fumed metal oxide supply agreement with
Cabot, effective as of the completion of this offering, pursuant to which Cabot
will continue to be our exclusive supplier of fumed metal oxides for our
currently existing CMP slurries. Although the agreement does not require us to
purchase from Cabot fumed metal oxides for CMP slurries that we develop in the
future, we expect that Cabot will be our primary supplier of fumed metal oxides
for these products as well. Under the new agreement, the prices we will pay to
Cabot in the future for fumed metal oxides will be higher than we have paid in
the past and will increase each year. See "Business -- Cabot as Our Raw
Materials Supplier".
    
 
   
     We currently pay a royalty to Rippey Corporation in connection with our
acquisition of selected assets from Rippey in July 1995. This royalty is equal
to approximately 2.5% of all revenue derived from the sale of our CMP slurries.
This obligation will expire in the third quarter of 2002.
    
 
   
     We will enter into a management services agreement with Cabot, to be
effective as of the date of this offering, pursuant to which Cabot will provide
administrative and corporate support services to us on an interim or
transitional basis. These services will be similar in scope to what Cabot
provided to us prior to this offering. Cabot will charge us for these services
at a price that reflects its cost to provide these services. We expect that the
cost to us will be similar to what our corporate charges were prior to this
offering.
    
 
   
     We are, and, after this offering but prior to the spin-off, will continue
to be, included in Cabot's consolidated federal income tax group, and our
federal income tax liability will be included in the consolidated federal income
tax liability of Cabot. We will enter into a tax sharing agreement with Cabot
under which we will pay Cabot an amount equal to our income tax liability
calculated as if we were an independent company. Under the terms of the tax
sharing agreement, Cabot will not be required to make any payment to us for the
use of our tax attributes that come into existence prior to the spin-off until
the time that we would otherwise be able to utilize those attributes.
    
 
     We have been a part of Cabot since we began developing CMP slurries in
1985. We were organized as a separate division of Cabot in July 1995. Our
financial statements reflect our historical results of operations, financial
position and cash flows. These financial statements have been carved out from
the financial statements and records of Cabot using the historical results of
operations and cash flows and historical basis of the assets and liabilities of
our business, as adjusted to reflect allocations of certain corporate charges
that our management believes are reasonable. Our historical financial
information may not necessarily reflect the results of our operations, financial
position and cash flows in the future or what the results of operations,
financial position and cash flows would have been had we been a separate,
stand-alone entity during those periods.
 
                                       26

<PAGE>   28
 
                             RESULTS OF OPERATIONS
 
   
     The following table sets forth, for the periods indicated, the percentage
of revenue of certain line items included in our combined statement of
operations data and our unaudited pro forma combined statements of income:
    
 
   

<TABLE>
<CAPTION>
                                                YEAR ENDED             THREE MONTHS ENDED
                                              SEPTEMBER 30,               DECEMBER 31,
                                        --------------------------   -----------------------
                                                              PRO                       PRO
                                                             FORMA                     FORMA
                                        1997   1998   1999   1999     1998     1999    1999
                                        ----   ----   ----   -----    ----     ----    -----
<S>                                     <C>    <C>    <C>    <C>     <C>      <C>      <C>
Total revenue.........................  100%   100%   100%    100%    100%     100%     100%
Cost of goods sold....................   56     50     49      54      48       46       50
                                        ---    ---    ---     ---     ---      ---      ---
Gross profit..........................   44     50     51      46      52       54       50
  Research and development............   24     17     15      15      17       13       13
  Selling and marketing...............    3      6      4       4       5        3        3
  General and administrative..........   13     15     12      12      12       11       11
  Amortization of goodwill and other
     intangibles......................    2      1      1       1       1        1        1
                                        ---    ---    ---     ---     ---      ---      ---
Operating income......................    2     11     19      14      17       26       22
Interest expense......................    0      0      0       1       0        0        1
                                        ---    ---    ---     ---     ---      ---      ---
Income before income taxes............    2     11     19      13      17       26       21
Provision for income taxes............    0      4      7       5       6       10        8
                                        ---    ---    ---     ---     ---      ---      ---
Net income............................    2%     7%    12%      8%     11%      16%      13%
                                        ===    ===    ===     ===     ===      ===      ===
</TABLE>

    
 
   
THREE MONTHS ENDED DECEMBER 31, 1999 VERSUS THREE MONTHS ENDED DECEMBER 31, 1998
    
 
   
REVENUE
    
   
    
 
   
     Total revenue was $35.0 million for the three months ended December 31,
1999, which represented a 68%, or $14.2 million, increase from the three months
ended December 31, 1998. Revenue from external sales was $34.2 million for the
three months ended December 31, 1999, which represented an increase of 68%, or
$13.9 million, from the three months ended December 31, 1998. Of this increase,
$9.8 million was due to a 48% increase in volume and $4.1 million was due to
increased weighted average selling prices. The volume growth was driven by the
increased use of CMP slurries in the manufacture of IC devices, and temporary
inventory build-up by some customers for year 2000 rollover concerns. The growth
was especially strong with respect to sales of CMP slurries for polishing
tungsten, which increased 77% in volume terms. Sales of slurries for hard disk
drives contributed $2.0 million to the growth as compared to the three months
ended December 31, 1998. Weighted average selling prices rose due to the sale of
higher performance products which had higher average selling prices. Also, we
shifted some of our sales in Japan from sales to distributors to sales directly
to customers, which resulted in an increased weighted average selling price.
    
 
   
     Related party revenue was $0.8 million for the three months ended December
31, 1999, which represented an increase of 48%, or $0.3 million, from the three
months ended December 31, 1998. This increase was due to higher volumes sold. On
a pro forma basis, for the three months ended December 31, 1999, related party
revenue would have been $0.6 million. This decrease reflects the fact that under
our existing arrangement with Cabot, we purchase from Cabot the fumed metal
oxide raw materials required to make the dispersions that we sell to Cabot and
the cost of these raw materials is included in the price we charge to Cabot,
while under our new dispersion services agreement Cabot will provide these raw
materials to us at no cost. As a result, our revenue and cost of goods
    
 
                                       27

<PAGE>   29
 
   
sold will decrease as a result of the new arrangements.
    
 
   
COST OF GOODS SOLD
    
 
   
     Total cost of goods sold was $16.2 million for the three months ended
December 31, 1999, which represented an increase of 61% or $6.2 million from the
three months ended December 31, 1998. Cost of goods sold related to external
sales was $15.4 million for the three months ended December 31, 1999, which
represented an increase of 62%, or $5.9 million, from the three months ended
December 31, 1998. Of this increase, $4.6 million was due to higher sales volume
and $1.3 million was due to higher weighted average costs per gallon. These
higher costs resulted from higher distribution costs resulting from the shift of
some sales to distributors to sales directly to customers in Japan and for raw
materials shipped to our manufacturing plant in Japan. Higher manufacturing
costs associated with improved quality requirements also contributed to this
increase. Because we sell products to Cabot at cost, our cost of goods sold for
these sales is equal to our related party revenue. On a pro forma basis, total
cost of goods sold would have been $17.3 million, which reflects a $1.4 million
increase for the fumed metal oxides we purchase from Cabot to produce our
slurries, partially offset by a $0.3 million decrease in the cost of goods sold
attributable to our new dispersion services agreement with Cabot, in each case
for the reasons described above.
    
 
   
GROSS PROFIT
    
 
   
     Our gross profit as a percentage of net revenue was 54% for the three
months ended December 31, 1999 as compared to 52% for the three months ended
December 31, 1998. Higher weighted average margins for new products, a higher
percentage of direct sales to customers and higher utilization of manufacturing
capacity contributed to the margin improvement. On a pro forma basis, for the
three months ended December 31, 1999, gross profit as a percentage of revenue
was 50%.
    
 
   
RESEARCH AND DEVELOPMENT
    
 
   
     Research and development expenses were $4.5 million in the three months
ended December 31, 1999, which represented an increase of 30%, or $1.0 million,
from the three months ended December 31, 1998. Of this increase, $0.6 million
was due to higher laboratory supply costs and other operating expenses
associated with the clean room. Increased staffing in other research and
development activities added $0.4 million to the increase in expenses.
    
 
   
     Key activities during the three months ended December 31, 1999 involved the
development of advanced particle technology, new and enhanced slurry products
and new CMP polishing pad technology.
    
 
   
SELLING AND MARKETING
    
 
   
     Selling and marketing expenses were $1.3 million in the three months ended
December 31, 1999, which represented an increase of 31%, or $0.3 million, for
the three months ended December 31, 1998. The increase was primarily due to the
hiring of additional customer support personnel in our North America, Japan and
Taiwan offices.
    
 
   
GENERAL AND ADMINISTRATIVE
    
 
   
     General and administrative expenses were $3.9 million in the three months
ended December 31, 1999, which represented an increase of 52%, or $1.3 million,
from the three months ended December 31, 1998. The increase was primarily due to
$0.7 million of additional personnel costs needed to support the general growth
of our business and a $0.3 million increase in legal costs incurred in
connection with patent litigation.
    
 
   
AMORTIZATION OF GOODWILL AND OTHER INTANGIBLES
    
 
   
     Amortization of goodwill and other intangibles was $0.2 million in the
three months ended December 31, 1999 and the three months ended December 31,
1998 and related to goodwill and other intangible assets associated with the
acquisition of selected distributor assets from a third party in 1995.
    
 
                                       28

<PAGE>   30
 
   
PROVISION FOR INCOME TAXES
    
 
   
     The effective tax rate on income from operations was 36% in the three
months ended December 31, 1999 and the three months ended December 31, 1998.
    
 
   
NET INCOME
    
 
   
     Net income was $5.7 million in the three months ended December 31, 1999,
which represented an increase of 142%, or $3.4 million, from the three months
ended December 31, 1998 as a result of the factors discussed above.
    
 
   
YEAR ENDED SEPTEMBER 30, 1999 VERSUS YEAR ENDED SEPTEMBER 30, 1998
    
 
REVENUE
 
   
     Total revenue was $98.7 million in 1999, which represented an increase of
68%, or $39.9 million, over 1998. Revenue from external sales was $95.7 million
in 1999, which represented an increase of 68%, or $38.8 million, from 1998. The
increase in external revenue was primarily due to a 53% increase in volume and,
to a lesser extent, a 10% increase in weighted average selling prices. The
volume growth was driven by the increased use of CMP slurries in the manufacture
of IC devices. This growth was especially strong in Asia, where volumes across
all slurry product lines increased by 114% and we began to recognize revenue
from the sale of CMP slurries used to polish the magnetic heads and the coating
on hard disks in hard disk drives. Weighted average selling prices rose from
1998 to 1999 due to the sale of higher performance products which had higher
weighted average selling prices, particularly our CMP slurries for polishing
tungsten.
    
 
   
     Related party revenue was $3.0 million in 1999, which represented an
increase of 52%, or $1.0 million, from 1998. This increase was due to higher
volumes sold. On a pro forma basis, for the fiscal year ended September 30,
1999, related party revenue would have been $2.0 million. This decrease reflects
the fact that under our existing arrangement with Cabot, we purchase from Cabot
the fumed metal oxide raw materials required to make the dispersions that we
sell to Cabot and the cost of these raw materials is included in the price we
charge to Cabot, while under our new dispersion services agreement Cabot will
provide these raw materials to us at no cost. As a result, our revenue and cost
of goods sold will decrease as a result of the new arrangements.
    
 
COST OF GOODS SOLD
 
   
     Total cost of goods sold was $47.9 million in 1999, which represented an
increase of 61%, or $18.2 million, from 1998. Cost of goods sold related to
external sales was $44.9 million in 1999, which represented an increase of 62%,
or $17.2 million, from 1998. Of that increase, $14.6 million was due to higher
sales volume and the remainder was primarily due to higher manufacturing costs
associated with improved quality requirements and start up costs of our Geino,
Japan facility. On a pro forma basis, for the year ended September 30, 1999,
total cost of goods sold would have been $52.5 million, which reflects a $5.9
million increase for the fumed metal oxides we purchase from Cabot to produce
our slurries, partially offset by a $1.3 million decrease in the cost of goods
sold attributable to our new dispersion services agreement with Cabot, in each
case for the reasons described above.
    
 
GROSS PROFIT
 
     Our gross profit as a percentage of revenue was 51% for 1999 and 50% for
1998. Higher margins from new products in 1999 were offset by increased spending
for expanded capacity and support capabilities. On a pro forma basis, for the
year ended September 30, 1999, gross profit as a percentage of revenue was 46%.
 
RESEARCH AND DEVELOPMENT
 
   
     Research and development expenses were $14.6 million in 1999, which
represented an increase of 44%, or $4.4 million, from 1998. Of this increase,
$2.3 million was due to higher laboratory supply costs and other operating
expenses associated with the clean room. Increased staffing related to other
research and development activities accounted for an additional $1.5 million of
the increase and consumption of supplies in research and development activities
contributed the rest of the increase. Key activities during 1999 involved the
development of advanced particle
    
 
                                       29

<PAGE>   31
 
technology, new or enhanced slurry products and new CMP polishing pad products.
 
SELLING AND MARKETING
 
   
     Selling and marketing expenses were $4.6 million in 1999, which represented
an increase of 39%, or $1.3 million, from 1998. Of this increase, $0.4 million
was due to the hiring of additional customer support personnel in the United
States, $0.4 million was due to increased selling costs in Japan and the rest
was due to increased production of product literature, costs relating to
industry trade shows and marketing consulting costs.
    
 
GENERAL AND ADMINISTRATIVE
 
   
     General and administrative expenses were $11.9 million in 1999, which
represented an increase of 39%, or $3.3 million, from 1998. Charges for
corporate services provided by Cabot increased $1.8 million from 1998 to 1999 to
keep pace with the growth of our business. Of the remaining increase, $1.2
million was due to additional administrative personnel as a result of general
business growth and $0.3 million was due to outside legal fees incurred in
connection with patent litigation.
    
 
AMORTIZATION OF GOODWILL AND OTHER INTANGIBLES
 
   
     Amortization of goodwill and other intangibles was $0.7 million in 1999 and
1998 and related to goodwill and other intangible assets associated with the
acquisition of selected assets from a third party in 1995.
    
 
PROVISION FOR INCOME TAXES
 
     The effective tax rate on income from operations was 36% in 1999 and 34% in
1998.
 
NET INCOME
 
     Net income was $12.3 million in 1999, which represented an increase of
190%, or $8.0 million, from 1998 as a result of the factors discussed above.
 
   
YEAR ENDED SEPTEMBER 30, 1998 VERSUS YEAR ENDED SEPTEMBER 30, 1997
    
 
REVENUE
 
   
     Total revenue was $58.8 million in 1998, which represented an increase of
67%, or $23.6 million, over 1997. Revenue from external sales was $56.9 million
in 1998, which represented an increase of 68%, or $23.0 million, from 1997. The
increase in external revenue was primarily due to a 61% increase in volume and,
to a lesser extent, a 4% increase in weighted average selling prices. The volume
growth was driven by the increased use of CMP slurries in the manufacture of IC
devices. Weighted average selling prices rose due to the sale of higher
performance products which had higher weighted average selling prices,
particularly our CMP slurries for polishing tungsten plugs.
    
 
     Related party revenue was $2.0 million in 1998, an increase of 45% from
$1.4 million in 1997, and increased due to higher volumes sold.
 
COST OF GOODS SOLD
 
   
     Total cost of goods sold was $29.7 million in 1998, which represented an
increase of 49%, or $9.7 million, from 1997. Cost of goods sold related to
external sales was $27.7 million, which represented an increase of 49%, or $9.1
million, from 1997. This increase was primarily due to higher sales volume.
    
 
GROSS PROFIT
 
   
     Our gross profit as a percentage of revenue increased to 50% in 1998 from
44% in 1997. The improvement was primarily the result of higher volumes and
improved operating efficiencies, as well as a greater percentage of higher
margin new products, particularly our CMP slurries for polishing tungsten plugs.
    
 
RESEARCH AND DEVELOPMENT
 
   
     Research and development expenses were $10.1 million in 1998, which
represented an increase of 21%, or $1.7 million, from 1997. The increase was due
to approximately $0.7 million of increased personnel costs, including increased
salary, fringe benefit, travel, recruiting and relocation expenses relating to
our development program teams. Approximately $0.4 million of the increase was
due to higher laboratory supply costs due to the increased size of the
development staff. Key activities during 1998 involved the
    
 
                                       30

<PAGE>   32
 
development of new CMP slurry and polishing pad products.
 
SELLING AND MARKETING
 
   
     Selling and marketing expenses were $3.3 million in 1998, which represented
an increase of 220%, or $2.3 million, from 1997. Approximately $1.9 million of
the $2.3 million increase was due to increased staffing and travel expenses for
global customer support, including in North America, Asia and Europe. The
increase was also due to increased spending to perform market research and
conduct promotional activities such as participation in trade shows and creation
and distribution of product literature.
    
 
GENERAL AND ADMINISTRATIVE
 
   
     General and administrative expenses were $8.6 million in 1998, which
represented an increase of 92%, or $4.1 million, from 1997. The increase in 1998
was primarily due to $2.0 million of increased legal expenses relating to patent
litigation. Approximately $0.8 million of the increase related to higher charges
for corporate services provided by Cabot and $0.4 million of the increase was
due to increased staffing expenses to support our overall business growth.
    
 
AMORTIZATION OF GOODWILL AND OTHER INTANGIBLES
 
   
     Amortization of goodwill and other intangibles was $0.7 million in 1998 and
1997 related to goodwill and other intangible assets associated with the
acquisition of selected assets from a third party in 1995.
    
PROVISION FOR INCOME TAXES
 
     The effective tax rate on income from operations was 34% in 1998 as
compared to a tax benefit of 7% in 1997. An income tax benefit was recorded in
1997 as a result of a tax credit for research and development activities that
exceeded our statutory taxes for that period.
 
NET INCOME
     Net income was $4.2 million in 1998, which represented an increase of 498%,
or $3.5 million, from 1997 as a result of the factors discussed above.
 
                      SELECTED QUARTERLY OPERATING RESULTS
 
   
     The following table presents our unaudited financial information for the
eight quarters ended December 31, 1999. This unaudited financial information has
been prepared in accordance with generally accepted accounting principles
applied on a basis consistent with the annual audited financial statements and
in the opinion of management, they include all necessary adjustments, which
consist only of normal recurring adjustments necessary to present fairly the
financial results for the periods. The results for any quarter are not
necessarily indicative of results for any future period.
    
 
   

<TABLE>
<CAPTION>
                                                                              QUARTER ENDED
                                        -----------------------------------------------------------------------------------------
                                        MARCH 31,   JUNE 30,   SEPT. 30,   DEC. 31,   MARCH 31,   JUNE 30,   SEPT. 30,   DEC. 31,
                                          1998        1998       1998        1998       1999        1999       1999        1999
                                        ---------   --------   ---------   --------   ---------   --------   ---------   --------
                                                                   (in thousands, except percentages)
<S>                                     <C>         <C>        <C>         <C>        <C>         <C>        <C>         <C>
Total revenue.........................   $14,001    $15,120     $17,620    $20,875     $21,867    $22,864     $33,084    $35,046
Cost of goods sold....................     7,343      7,554       8,435     10,036      10,177     11,007      16,671     16,188
                                         -------    -------     -------    -------     -------    -------     -------    -------
Gross profit..........................     6,658      7,566       9,185     10,839      11,690     11,857      16,413     18,858
                                            47.5%      50.0%       52.1%      51.9%       53.5%      51.9%       49.6%      53.8%
Operating expenses:
  Research and development............     2,501      2,455       2,900      3,445       3,067      3,669       4,370      4,484
  Selling and marketing...............     1,077      1,013         554        954       1,083      1,108       1,427      1,250
  General and administrative..........     1,869      2,106       2,832      2,570       2,989      3,232       3,089      3,896
  Amortization of goodwill and other
    intangible assets.................       180        180         180        180         180        180         180        180
                                         -------    -------     -------    -------     -------    -------     -------    -------
Total operating expenses..............     5,627      5,754       6,466      7,149       7,319      8,189       9,066      9,810
                                         -------    -------     -------    -------     -------    -------     -------    -------
Income before income taxes............     1,031      1,812       2,719      3,690       4,371      3,668       7,347      9,048
Provision for income taxes............       353        622         932      1,313       1,559      1,307       2,617      3,300
                                         -------    -------     -------    -------     -------    -------     -------    -------
Net income............................   $   678    $ 1,190     $ 1,787    $ 2,377     $ 2,812    $ 2,361     $ 4,730    $ 5,748
                                         =======    =======     =======    =======     =======    =======     =======    =======
</TABLE>

    
 
                                       31

<PAGE>   33
 
                        LIQUIDITY AND CAPITAL RESOURCES
 
   
     We had cash flows from operating activities of $0.3 million in the three
months ended December 31, 1999 and $2.1 million in the three months ended
December 31, 1998. We had cash flows from operating activities of $9.0 million
in 1999, $2.3 million in 1998 and $0.4 million in 1997. Our principal capital
requirements have been to fund working capital needs that support the expansion
of our business. For the three months ended December 31, 1999, inventory was
also increased to prepare for any supply chain interruptions that might have
occurred due to the year 2000 date change.
    
 
   
     In the three months ended December 31, 1999, cash flows used in investing
activities were $7.2 million, primarily due to the construction of our Aurora,
Illinois manufacturing building, the purchase of land in Korea for a new
distribution facility and the purchase of research and development equipment. In
the three months ended December 31, 1998, cash flows used in investing
activities were $6.8 million due to manufacturing capacity increases, the
acquisition of research and development equipment and land and construction of
our new headquarters building in Aurora, Illinois.
    
 
   
     In 1999, cash flows used in investing activities were $17.1 million,
primarily due to the completion of our Geino, Japan facility and construction of
our Aurora, Illinois headquarters building. In 1998, cash flows used in
investing activities were $9.3 million due to manufacturing capacity increases
and the acquisition of research and development equipment. In 1997, cash flows
used in investing activities were $1.7 million, primarily related to additions
for the purchase of machinery and equipment used in production and research and
development.
    
 
   
     We had cash flows from financing activities of $6.9 million for the three
months ended December 31, 1999 and $4.8 million for the three months ended
December 31, 1998, resulting from capital contributions from Cabot. We had cash
flows from financing activities of $8.1 million in 1999, $6.8 million in 1998,
and $1.2 million in 1997 resulting from capital contributions from Cabot.
    
 
   
     Upon completion of this offering, we will have a $25 million unsecured
revolving credit facility with Fleet National Bank. Loans under this facility
will be used primarily for general corporate purposes, including working capital
and capital expenditures. There is a sublimit for letters of credit of $5
million. We may elect to borrow at either:
    
 
   
- the higher of Fleet National Bank's base rate as announced from time to time
  or the federal funds rate plus a margin of up to 0.50%; or
    
 
- the LIBOR rate plus a margin of between 1.5% and 2.0%, determined quarterly.
 
   
     Interest on base rate loans will be payable at the end of each calendar
quarter, and on LIBOR loans at the earlier of the end of each interest period or
quarterly.
    
 
   
All borrowings under our revolving credit facility will become due and payable
in April 2003. Borrowings under this credit facility may be prepaid at any time,
subject to payment of normal breakage costs, if any, in the case of LIBOR loans.
    
 
   
     We would breach our revolving credit facility if we were to incur losses
greater than $7.5 million in a single fiscal quarter or greater than $10 million
in two consecutive quarters. In addition to customary covenants, this credit
facility contains certain restrictions on our ability to incur additional
indebtedness, create liens, make certain investments, pay dividends or make
certain distributions on our stock, merge, consolidate, make certain
acquisitions or dispositions and enter into transactions with affiliates.
    
 
   
     Upon the completion of this offering, we will also have an unsecured term
credit facility, consisting of a $3.5 million term loan and a $13.5 million term
loan, with LaSalle Bank National Association. We expect that all $17.0 million
of borrowings under this facility will be used to fund a dividend to Cabot.
    
 
   
     The $3.5 million term loan will be funded on the basis of the State of
Illinois State Treasurers Economic Program. During the
    
 
                                       32

<PAGE>   34
 
   
period that we remain eligible for this program and the State of Illinois
maintains appropriate funds to cover the $3.5 million term loan, the outstanding
amount will bear interest at a rate equal to 1.75% plus:
    
 
   
- until the second anniversary of the closing date of the loan, 70% of the two
  year treasury rate; and
    
 
   
- after the second anniversary of the closing date and until the termination
  date of this credit facility, which will be five years from the closing date
  of the credit facility, 70% of the three year treasury rate.
    
 
   
     During any period in which we are ineligible for this program or the State
of Illinois removes funds on deposit with the lender for purposes of funding
this loan, the outstanding amount will bear interest at the rate applicable to
the $13.5 million term loan described below.
    
 
   
     With respect to the $13.5 million term loan, we may elect to borrow at
either LaSalle Bank's base rate or the Eurodollar rate plus an applicable
margin, which will vary between 1.5% and 2.0% depending on our ratio of funded
debt to EBITDA.
    
 
   
     Interest on the $3.5 million term loan and each base rate loan will be
payable quarterly. Interest on each Eurodollar loan will be payable on the last
day of the applicable interest period, which will be a one, two or three month
period.
    
 
   
     During the existence of any event of default under the term credit
facility, the applicable interest rate on each type of loan will be increased
2.0%.
    
 
   
     The total principal amount of the $3.5 million term loan will be payable
upon the termination date of the credit facility, which will be five years from
the closing date of this credit facility. Principal on the $13.5 million term
loan will be payable in quarterly installments of $337,500, with the balance
payable upon the termination date. Subject to specified minimum amounts, we can
convert base rate loans and Eurodollar loans into loans of the other type.
    
 
   
     During the term of this facility, we will be subject to prepayment
provisions, financial ratios, default provisions and restrictive covenants
similar to those described with respect to our $25 million revolving credit
facility.
    
 
   
     Under both our $25.0 million revolving credit facility and our $17.0
million term credit facility, we will be required to maintain the following
financial ratios:
    
 
   
- a ratio of (A) cash plus short-term investments plus net accounts receivable
  to (B) total current liabilities equal or above 1.25 to 1. The actual ratio as
  of December 31, 1999 was 3.06 to 1. Assuming the $25.0 million of revolving
  loans under our revolving credit facility and the $17.0 million of term loans
  under our term credit facility had been outstanding on December 31, 1999, and
  we had used all $17.0 million of borrowings under our term credit facility to
  fund a dividend to Cabot as of that date, the ratio would have been 1.84 to 1;
    
 
   
- a leverage ratio of (A) total funded indebtedness to (B) EBITDA below 2.25 to
  1. This ratio would have been satisfied as of December 31, 1999 because we had
  no funded indebtedness as of that date. Assuming the $25.0 million of
  revolving loans under our revolving credit facility and the $17.0 million of
  term loans under our term credit facility had been outstanding during the
  three month period ended December 31, 1999, the ratio would have been 1.52 to
  1; and
    
 
   
- a minimum coverage ratio of (A) EBIT to (B) interest expense greater than 3.0
  to 1. This ratio would have been satisfied as of December 31, 1999 because we
  had no interest expense as of that date. Assuming the $25.0 million of
  revolving loans under our revolving credit facility and the $17.0 million of
  the term loans under our term credit facility had been outstanding during the
  three month period ended December 31, 1999, the ratio would have been 7.40 to
  1.
    
 
     EBITDA is our net income before taxes plus interest expense, depreciation
and amortization. EBIT would take into account depreciation and amortization.
 
   
     We estimate that our total capital expenditures in 2000 will be
approximately $32.5 mil-
    
 
                                       33

<PAGE>   35
 
lion, approximately $7.2 million of which we have already spent. Our major
capital expenditures in 2000 are expected to be:
 
- approximately $20.4 million to expand our existing North American
  manufacturing facilities and build and equip a new slurry manufacturing
  facility adjacent to our current facility in Aurora, Illinois;
 
   
- approximately $8.1 million to expand our existing manufacturing facility in
  Geino, Japan and establish new distribution facilities in Asia;
    
 
- approximately $0.7 million to expand and improve our Barry, Wales facility;
  and
 
- approximately $3.4 million for polishing and other equipment used in our
  research and development activities.
 
   
     We believe that cash generated by our operations and borrowings under our
revolving credit facility will be sufficient to fund our operations and expected
capital expenditures for the next 24 months. However, we plan to expand our
business and continue to improve our technology and, to do so, we may be
required to raise additional funds in the future through public or private
equity or debt financing, strategic relationships or other arrangements.
Financing may not be available on acceptable terms, or at all, and our failure
to raise capital when needed could negatively impact our business, financial
condition or results of operations. Because we will agree with Cabot that we
will not issue any securities if doing so would reduce Cabot's ownership of us
to less than 80% prior to the spin-off, our ability to raise capital through
further sales of equity securities is limited until the spin-off occurs.
Additional equity financing could be dilutive to the holders of our common stock
and debt financing, if available, may involve restrictive covenants. See "Risk
Factors -- Risks Relating to Our Business -- Our ability to raise capital in the
future may be limited and this may limit our ability to expand our business and
improve our technology".
    
 
   
     Cabot is currently a defendant in two lawsuits involving Rodel. We will
agree to indemnify Cabot for any liabilities or damages resulting from these
lawsuits. See "Business -- Legal Proceedings".
    
 
      EFFECT OF CURRENCY EXCHANGE RATES AND EXCHANGE RATE RISK MANAGEMENT
 
   
     We conduct business operations outside of the United States through our
foreign operations. Our foreign operations maintain their accounting records in
their local currencies. Consequently, period to period comparability of results
of operations is affected by fluctuations in exchange rates. The primary
currencies to which we have exposure are the Japanese Yen and the British Pound.
Our exposure to foreign currency exchange risks has not been significant because
a significant portion of our foreign sales are denominated in U.S. dollars. As
foreign markets become a more significant portion of our business, we may enter
into forward contracts in an effort to manage foreign currency exchange
exposure.
    
 
                      MARKET RISK AND SENSITIVITY ANALYSIS
 
FOREIGN EXCHANGE RATE RISK
 
   
     During 1999, less than 10% of our revenue was transacted in currencies
other than the U.S. dollar. We generally do not enter into forward exchange
contracts as a hedge against foreign currency exchange risk on transactions
denominated in foreign currencies or for speculative or trading purposes. We
have performed a sensitivity analysis assuming a hypothetical 10% adverse
movement in foreign exchange rates. As of September 30, 1999, the analysis
demonstrated that such market movements would not have a material adverse effect
on our consolidated financial position, results of operations or cash flows.
Actual gains and losses in the future may differ materially from this analysis
based on changes in the timing and amount of foreign currency rate movements and
our actual exposures. We believe that our exposure to foreign currency exchange
rate risk at September 30, 1999 was not material.
    
 
   
     There have been no material changes in market risk exposures through
December 31, 1999.
    
 
                                       34

<PAGE>   36
 
   
                            NEW ACCOUNTING STANDARDS
    
 
     In April 1998, the American Institute of Certified Public Accountants
issued Statement of Position 98-1, "Accounting for the Costs of Computer
Software Developed or Obtained for Internal Use". Statement of Position 98-1
provides guidance regarding whether computer software is internal-use software,
the capitalization of costs incurred for computer software developed or obtained
for internal use and accounting for the proceeds of computer software originally
developed or obtained for internal use and then subsequently sold to the public.
We do not expect the impact of adopting Statement of Position 98-1, which will
be effective for us in fiscal 2000, to be material to our financial condition or
results of operations.
 
     In April 1998, the American Institute of Certified Public Accountants
issued Statement of Position 98-5, "Reporting on the Costs of Start-Up
Activities". Statement of Position 98-5 requires companies to expense start-up
and organization costs as incurred. Statement of Position 98-5 broadly defines
start-up activities and provides examples to help entities determine costs that
are and are not within the scope of Statement of Position 98-5. Statement of
Position 98-5 will be effective for us in fiscal 2000, and its initial
application is to be reported as the cumulative effect of a change in accounting
principle. We do not expect the impact of adopting Statement of Position 98-5 to
be material to our financial condition or results of operations.
 
     In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 133, "Accounting for Derivative Instruments
and Hedging Activities". Statement of Financial Accounting Standards No. 133
establishes new standards of accounting and reporting for derivative instruments
and hedging activities. Statement of Financial Accounting Standards No. 133
requires all derivatives be recognized at fair value in the statement of
financial position, and the corresponding gains or losses be reported either in
the statement of operations or as a component of comprehensive income, depending
on the type of hedging relationship that exists. We do not expect the impact of
adopting Statement of Financial Accounting Standards No. 133, which will apply
to us in 2001, to be material to our financial condition or results of
operations.
 
   
     In December 1999, the SEC released Staff Accounting Bulletin No. 101, which
provides guidance on the recognition, presentation and disclosure of revenue in
financial statements filed with the SEC. We are required to be in conformity
with the provisions of Staff Accounting Bulletin No. 101 no later than October
1, 2000 and do not expect a material change in our financial condition or
results of operations as a result of Staff Accounting Bulletin 101.
    
 
                                       35

<PAGE>   37
 

 
                                   BUSINESS
 
                                  OUR COMPANY
 
   
     We are the leading supplier of slurries used in chemical mechanical
planarization, or CMP. We believe that we have an approximately 80% share of the
slurries sold to IC device manufacturers worldwide. CMP is a polishing process
used by IC device manufacturers to planarize many of the multiple layers of
material that are built upon silicon wafers to produce advanced IC devices.
Planarization is a polishing process that levels and smooths, and removes the
excess material from, the surfaces of these layers. CMP slurries are liquids
containing abrasives and chemicals that facilitate and enhance this polishing
process. CMP assists IC device manufacturers in producing smaller, faster and
more complex IC devices with fewer defects. We believe CMP will become
increasingly important in the future as manufacturers seek to further shrink the
size of these devices and improve their performance. Most of our CMP slurries
are used to polish insulating layers and the tungsten plugs that go through the
insulating layers and connect the multiple wiring layers of IC devices. We have
developed and have begun limited sales of new CMP slurries that our customers
use for polishing the coating on the hard disks and the magnetic heads in hard
disk drives, although in 1999 revenue from sales of these CMP slurries accounted
for less than 2.0% of our total revenue. We continue to develop slurries for
additional new applications. In addition, we have recently begun producing and
selling polishing pads used in the CMP process.
    
 
                            IC DEVICE MANUFACTURING
 
     Today's advanced IC devices are composed of millions of transistors and
other electronic components connected by miles of wiring. The wiring, composed
primarily of aluminum and tungsten, carries electric signals through the
multiple layers of the IC device. Insulating material is used throughout the IC
device to isolate the electronic components and wiring to prevent short
circuiting and to improve the efficiency of electric signal travel within the
device. To increase performance, IC device manufacturers have progressively
increased the number, or density, of transistors and other electronic components
in each IC device.
 
     The manufacturing process for IC devices typically begins with a circular
wafer of pure silicon. A large number of identical IC devices are manufactured
on each wafer at the same time, and at the end of the process, the wafer is cut
into the individual devices. The first step in the manufacturing process is to
build transistors and other electronic components on the silicon wafer. These
components are then wired together in a particular sequence to produce an IC
device with the desired characteristics. Once the transistors and other
electronic components are in place on the silicon wafer, they are usually
covered with a layer of insulating material, most often silicon dioxide.
 
     CMP is used to planarize the insulating layers of an IC device and prepare
them for a process known as metallization. During metallization, wiring is added
to the surface of the insulating layer through a series of steps involving:
 
- depositing metal, usually aluminum, onto the surface of the layer;
 
- projecting an image of the desired wiring pattern on the layer using a process
  known as photolithography; and
 
- removing the excess deposited metal from the surface of the insulating layer
  using a process known as etching, which leaves behind the desired wiring
  pattern.
 
When the wiring is finished, another layer of insulating material is added and
planarized using CMP. This process of alternating insulating and wiring layers
is repeated until the IC device is completed. The electronic components and
wiring layers are connected by conductive plugs that are formed by making holes
in the insulating layers and filling those holes with metal, usually tungsten.
After these holes have been filled with tungsten, CMP is used to remove all the
excess tungsten above the surface of the insulating layer so that the top of the
plug is level with the surface of the
 
                                       36

<PAGE>   38
 
insulating layer before the next wiring layer is built. Manufacturing IC devices
requires precision processing in ultra clean, controlled environments.
 
     The semiconductor industry has a generally accepted set of design rules
that describe current and projected feature size and spacing of electronic
components and wiring in IC devices. The feature size and spacing in these
design rules have been progressively decreasing to accommodate the demand for
increased circuit density and miniaturization. As the density of IC devices
increases, the amount of wiring needed to connect the transistors and other
electronic components to each other also increases. As IC devices become
smaller, this increase in wiring requires tighter and more precise spacing of
the wiring and has led to an increase in the layers of IC devices.
 
   
     According to the Semiconductor Industry Association's National Technology
Roadmap for Semiconductors (1998 and 1999 Editions), the trends toward increased
density and miniaturization of IC devices are expected to continue. While the
number of layers varies by IC device type, an advanced logic device built with
today's common 0.25 micron feature size has approximately seven insulating and
six wiring layers and a typical memory device built with the same feature size
has approximately three insulating and two wiring layers. By 2001, the
Semiconductor Industry Association predicts that advanced IC devices will be
manufactured with a 0.15 micron feature size and that advanced logic devices
will have approximately eight insulating and seven wiring layers and advanced
memory devices will have approximately four insulating and three wiring layers.
CMP is currently used to polish both the insulating layers and the tungsten
plugs in IC devices in separate steps. As a result, even though CMP is not
currently used to polish the wiring layers, the number of CMP steps used to
produce an IC device is typically at least equal to the total number of
insulating and wiring layers in the device. While CMP is currently used more in
the manufacture of logic devices than memory devices, we believe that the use of
CMP in the manufacture of memory devices will increase in the future as the
feature size and spacing of these devices decreases and the number of layers in
the device increases.
    
 
     The increased density and miniaturization of IC devices has also resulted
in an increased emphasis on reduction of defects and residue remaining after the
CMP process. A defect is any imperfection on a layer of an IC device that causes
a short circuit or other problem with the performance of the device. Residue
from the CMP process consists of particle and chemical residue left on the layer
surface as a result of the CMP process. The likelihood that a defect or residue
of a given size will negatively effect the performance of an IC device increases
as the density and miniaturization of the device increase. IC device
manufacturers are requiring that the number of defects per given area decline
and that the residues from the CMP process be reduced.
 
                       CHEMICAL MECHANICAL PLANARIZATION
 
     The CMP process involves both chemical reactions and physical means to
planarize the insulating layers of an IC device that are built upon a silicon
wafer and the conductive tungsten plugs that go through the insulating layers
and connect the multiple wiring layers of IC devices. The wafer is typically
held on a rotating carrier which is spun at high speeds and pressed against a
rotating, polishing table. The portion of the table that comes in contact with
the wafer is covered by a textured, polishing pad. A CMP slurry is continuously
applied to the polishing pad during the CMP process to facilitate and enhance
the polishing process. CMP slurries are liquid compounds composed of high purity
deionized water, chemical additives and abrasive agents that chemically interact
with the surface material of the IC device at an atomic level.
 
                                       37

<PAGE>   39
 
     The following diagram demonstrates the CMP process as applied to the
insulating layers of an IC device:
 
                    [CMP OF OXIDE INSULATING LAYER GRAPHIC]
 
     The following diagram demonstrates the CMP process as applied to the
conductive tungsten plugs of an IC device:
 
                     [CMP OF OXIDE TUNGSTEN PLUGS GRAPHIC]
 
                                BENEFITS OF CMP
 
   
     CMP provides IC device manufacturers with a number of advantages. CMP
enables IC device manufacturers to produce smaller IC devices with greater
density, both of which improve the performance of the device. As IC devices
shrink and become more dense, they require smaller feature sizes and tighter
spacing between the wiring of the device. If the surface is not level, the
smaller feature size and tighter spacing make it more difficult for the
photolithography equipment to focus accurately and create the desired wiring
pattern. In addition, because today's smaller, denser IC devices have more
layers, any uneveness of a layer at or near the bottom of an IC device will get
magnified in the additional layers that are added to the device. Defects caused
by problems in the photolithography process or uneveness in the layers can lead
to:
    
 
   
- short circuits;
    
 
   
- reduced performance; and
    
 
   
- at worst, failure of the IC device.
    
 
                                       38

<PAGE>   40
 
By using CMP, IC device manufacturers can eliminate or minimize these problems.
 
     By enabling IC device manufacturers to make smaller IC devices, CMP allows
them to increase their throughput, or the number of IC devices that they can
manufacture in a given time period. CMP also helps reduce the number of
defective or substandard IC devices produced, which increases the device yield.
Improvements in throughput and yield reduce an IC device manufacturer's total
production costs. Manufacturers can achieve further improvements in throughput
and yield through improvements in the CMP process that reduce defectivity rates
and decrease the amount of time required for the polishing process.
 
                                  CMP SLURRIES
 
     The characteristics that make an effective CMP slurry include:
 
- high polishing rates, which increase productivity and throughput;
 
- high selectivity, which means enhancing the polishing of specific materials
  while inhibiting polishing of other materials;
 
- uniform polishing of different surface materials at the same time, which
  avoids problems such as dishing and erosion;
 
- low levels of chemical and physical impurities, which reduce defects and
  residues on the polished surface that can adversely affect IC device
  performance; and
 
- colloidal stability, which means the abrasive particles within the slurry do
  not settle, which is important for uniform polishing with minimum defects.
 
     Most of the foregoing qualities of CMP slurries affect and enhance not only
the performance of the IC devices but can also positively impact the cost of
ownership of the CMP process. Cost of ownership is a calculation by which IC
device manufacturers evaluate the benefits and costs of each production step by
analyzing the impact of that step on throughput and yield and the costs of the
production inputs of that step. This calculation allows IC device manufacturers
to compare competing production processes and inputs. An input that improves
throughput and yield may reduce the cost of ownership even though it costs more.
 
     Prior to introducing a new or different CMP slurry into its manufacturing
process, an IC device manufacturer generally requires that the slurry be
qualified at each of its plants through a series of tests and evaluations
intended to ensure that the slurry will function properly in the manufacturing
process and to optimize the slurry's application. These tests may require
changes to the CMP process, the CMP slurry and/or the CMP polishing pad. While
this qualification process varies depending on numerous factors, it is not
unusual for this process to be very expensive and take six months or more to
complete. IC device manufacturers must take the cost, time delay and impact on
production into account when they consider switching to a new CMP slurry.
 
                                INDUSTRY TRENDS
 
     The rapid growth of the CMP slurry market has been driven in large part by
the significant growth and technological advances the semiconductor industry has
experienced over the past decade. IC devices are critical components in an
increasingly wide variety of products and applications, including computers,
data processing, communications, telecommunications, the Internet, automobiles
and consumer and industrial electronics. As the performance of IC devices has
increased and their size and cost have decreased, the use of IC devices in these
applications has grown significantly. According to industry sources, the
worldwide semiconductor market as measured by total sales grew at an average
annual compound rate of 11% in the period from 1988 through 1998. Dataquest and
other industry sources project continued growth at similar rates in the future.
 
     The rapid growth in the semiconductor industry, increasing demand for
smaller, higher performance and more complex IC devices and pressure on IC
device manufacturers to reduce their costs have led to increased use of CMP and
consumption of CMP slurries and polishing pads. We believe that worldwide
revenues from the sale of
 
                                       39

<PAGE>   41
 
   
CMP slurries to IC device manufacturers grew to approximately $120 million in
1999. Industry surveys project that annual worldwide revenues in this market
will grow to between approximately $300 and $400 million by 2003. This projected
growth assumes increases in the number of IC devices produced, the percentage of
IC devices that are produced using CMP and the number of polishing steps used to
produce each device.
    
 
     Although some sectors of the semiconductor industry have been highly
cyclical, sales of CMP slurries and polishing pads have not been adversely
affected by these trends. We believe this is because sales of CMP slurries and
polishing pads are driven primarily by the number of IC devices sold, which has
been much less cyclical than the prices of IC devices. In addition, we believe
that IC manufacturers have continued to increase their use of CMP because the
CMP process represents only a small percentage of the total production cost of
an IC device and is very important to the continued improvement of IC device
performance.
 
                        OTHER APPLICATIONS OF CMP IN THE
                        IC DEVICE MANUFACTURING PROCESS
 
   
     CMP is primarily used today for polishing the insulating layers and
tungsten plugs in IC devices. However, we believe there are a number of other
applications for CMP in the IC device manufacturing process. We have undertaken
research, developed and successfully tested slurries for some of these
applications that we expect to be able to commercialize in the next three years.
We have developed CMP slurries for polishing copper because we believe copper
will increasingly be used in the future for both wiring and conductive plugs
because it conducts electricity better than aluminum and tungsten. However,
there are significant technological challenges and operating issues that must be
addressed before IC device manufacturers switch to copper from aluminum and
tungsten. To date, only a very limited number of IC device manufacturers have
switched to copper and their production using copper is very limited.
    
 
     CMP is currently being used by some of the leading IC device manufacturers
in connection with a process known as shallow trench isolation. Shallow trench
isolation is a relatively new method of isolating the electronic components
built on silicon wafers of an IC device to prevent short circuits and other
electrical interference. Shallow trench isolation uses CMP before the first
insulating layer is put down on the wafer. Isolation methods used prior to
shallow trench isolation did not use CMP. By using CMP in conjunction with
shallow trench isolation, IC device manufacturers can achieve greater
miniaturization and density of their IC devices.
 
     An additional application of CMP in the IC device manufacturing process
includes planarizing the polysilicon material often used to build the electronic
components of both logic and memory devices. As the number of these electronic
components per IC device increases, we believe that the use of polysilicon CMP
will increase.
 
                                    STRATEGY
 
   
     Our objective is to maximize our profitability and stockholder value by
maintaining and leveraging our leading position in the CMP slurry market. Our
proven track record increases the propensity for IC device manufacturers to work
with us in the early stages of product development for their next generation IC
devices. In addition, IC device manufacturers would likely incur significant
evaluation and qualification costs if they switch to a new CMP slurry.
    
 
   
     We will pursue the following strategies to achieve our objective:
    
 
REMAIN THE TECHNOLOGY LEADER IN CMP SLURRIES
 
     We believe that technology is key to success in the CMP slurry market and
we plan to continue to devote significant resources to research and development.
We need to keep pace with the rapid technological advances in the semiconductor
industry so we can continue to deliver products that meet our customers'
evolving needs. We intend to use our advanced research and
 
                                       40

<PAGE>   42
 
development, polishing and metrology capabilities to:
 
- advance our understanding of our customers' technology, processes, and
  performance requirements for qualified products;
 
- further improve the chemical and mechanical qualities of our CMP products; and
 
- demonstrate and deliver advanced CMP solutions to the semiconductor industry.
 
BUILD AND MAINTAIN CUSTOMER INTIMACY
 
     We believe that building close relationships with our customers is another
key to success in the CMP slurry market. We work closely with our customers to
research and develop new and better CMP slurries, to integrate our slurries into
their manufacturing processes and to assist them with supply, warehousing,
packaging and inventory management. We plan to continue to devote significant
resources to enhancing our close customer relationships.
 
EXPAND GLOBALLY
 
     We believe that having production facilities and personnel and other
resources in strategic locations around the world is key to the success of our
business, particularly in light of increased IC device manufacturing in Asia.
Accordingly, we have established a global presence by opening production
facilities in Barry, Wales and Geino, Japan. We also have assembled a team of
account managers and independent distributors strategically located in Europe,
Taiwan, Singapore, Japan and Korea and technical support and sales personnel
throughout the United States and in Europe and Asia. We intend to expand our
production capacity, technical support and sales in many of the locations around
the world where IC device production is concentrated.
 
ATTRACT AND RETAIN TOP QUALITY PERSONNEL
 
     We have assembled a highly skilled and dedicated workforce that includes a
wide range of scientists and applications specialists, many of whom have
significant experience in the semiconductor industry. We plan to continue to
attract and retain experienced personnel committed to providing high performance
products and strong customer and applications support.
 
MAINTAIN TOP QUALITY PRODUCTS AND SUPPLY
 
     Our customers demand consistent high quality products and a reliable source
of supply. We will continually advance our strict quality controls to improve
the uniformity and consistency of performance of our CMP products. The capacity
and location of our production facilities throughout the United States and in
Europe and Asia allow us to provide a reliable supply chain to meet our
customers' CMP slurry requirements in a consistent, timely manner.
 
EXPAND INTO NEW APPLICATIONS AND PRODUCTS
 
   
     We intend to leverage our CMP experience and technology into new
applications and products. Starting from our core CMP slurries designed for
polishing the insulating layers of IC devices, we have developed and introduced
new slurries for CMP polishing of the tungsten plugs currently used to connect
the wiring between multiple layers of IC devices and for CMP polishing of the
magnetic heads and the coating on hard disks in hard disk drives. We have also
developed CMP slurries for polishing the aluminum and copper wiring layers of IC
devices. Additionally, we are using our knowledge of CMP materials to expand
into the production of CMP polishing pads so that we can provide our customers
with a broader range of applications and materials used in the CMP process.
    
 
                                    PRODUCTS
 
CMP SLURRIES FOR IC DEVICES
 
     We produce CMP slurries of various formulations for polishing a wide
variety of materials. We have developed new, improved generations of each of our
slurries as well as new slurries to keep pace with our customers' evolving
needs. We currently produce more than ten slurries for polishing the oxide
insulating layers of IC devices, which is the most common use of CMP in the IC
device manufacturing process. We have introduced
 
                                       41

<PAGE>   43
 
new generations of oxide slurries that reduce both defectivity in IC devices and
the required polishing time. While our oxide CMP slurries are also used to
polish poly-silicon material, we have developed a CMP slurry specifically
engineered to polish this material which offers improved selectivity to
poly-silicon and fine poly-silicon surface finish.
 
     We also manufacture more than seven slurry products for polishing tungsten.
As with our oxide slurries, we have introduced new generations of slurries for
polishing tungsten that offer improvements in polishing performance. These
improvements include faster polishing rates, greater polishing uniformity and
reduced defectivity.
 
   
     The following table shows our primary products and the surfaces polished,
primary features and end uses:
    
 
   

<TABLE>
<CAPTION>
PRODUCT            SURFACE POLISHED            PRIMARY FEATURES           END USES
<S>                <C>                         <C>                        <C>
SC112              Oxide                       Original formulation       IC devices
SC1                Oxide                       Concentrate form of SC112  IC devices
Semi-Sperse(R)12   Oxide                       High polishing rate        IC devices
Semi-Sperse(R)25   Oxide                       High polishing rate        IC devices
                                               concentrate
Semi-Sperse(R)AM100 Oxide                      High purity                IC devices
Semi-Sperse(R)AM100C Oxide                     High purity                IC devices
Semi-Sperse(R)D7000 Oxide                      Low defectivity            IC devices
Semi-Sperse(R)P1000 Polysilicon                High selectivity           IC devices
Semi-Sperse(R)FE400* Tungsten                  Low erosion                IC devices
Semi-Sperse(R)WA400* Tungsten                  Low erosion                IC devices
Semi-Sperse(R)W2000 Tungsten                   High performance           IC devices
Semi-Sperse(R)W2585 Tungsten                   Low dishing, erosion       IC devices
Lustra(TM)2090     Coating on hard disks       Low defectivity            Hard disk drives
</TABLE>

    
 
---------------
   
* These two products are sold together as a package.
    
 
CMP SLURRIES FOR HARD DISK DRIVES
 
   
     In 1998 we introduced CMP slurries for CMP polishing of the magnetic heads
and the coating on hard disks in hard disk drives. We believe this CMP
application can significantly improve the surface finish of these coatings,
resulting in greater storage capacity of the substrates. We also believe that
this CMP application will improve the speed and reliability of information
exchange between the hard disks and the magnetic heads in hard disk drives. In
addition, we believe that, as with IC device manufacturers, CMP can also improve
the production efficiency of manufacturers of hard disk drives by helping them
increase their throughput and yield.
    
 
     We developed our CMP slurries for hard disk drives by leveraging our core
slurry technology and manufacturing capacity and hiring personnel directly from
the industry who understand the needs of hard disk drive manufacturers. We also
established a dedicated research and development team and an applications
support team who employ a process solution approach similar to what we use for
our other slurry products. We believe that these markets offer significant
potential and that our products in this area offer superior performance over
currently used materials. We began commercial sale of these products in 1999. We
have generated more than $1.5 million of sales from these products during 1999.
 
                                       42

<PAGE>   44
 
POLISHING PADS
 
   
     CMP polishing pads are consumable materials used in the CMP process that
work in conjunction with the CMP slurry to facilitate the polishing process.
There are two principal types of CMP polishing pads used with CMP slurries:
    
 
   
- a round pad that is designed to be affixed to a platform which moves in a
  rotary or orbital motion; and
    
 
   
- a developing technology in which a belt, roll or web polishing pad is affixed
  to a platform that moves in a linear motion.
    
 
Both types of polishing pads are consumed during the CMP process as their
surface becomes worn by the polishing action.
 
   
     The CMP polishing pad market is currently led by one principal supplier,
Rodel, which we believe has an approximately 90% share of the CMP polishing pad
market. Based on discussions with our customers as well as our own examination
of the CMP polishing pad market, we identified demand for higher quality, more
reliable and consistent polishing pads and the opportunity to jointly market our
CMP slurries and polishing pads to our existing customers.
    
 
     Our first series of polishing pads, which was introduced in July 1999, is
designed for tungsten applications. In early 2000, our tungsten pad was
qualified by a major semiconductor manufacturer's process and we made our first
commercial sales of CMP polishing pads to this customer. We expect to introduce
an extended line of polishing pads in 2000. We believe that our CMP polishing
pads offer advantages over currently available CMP polishing pads, including
higher removal rates, longer life and more uniform polishing, and that our new
pad production technology provides fundamental improvements over existing
manufacturing methods that will result in increased pad consistency and
reliability. We further believe the compatibility of our CMP polishing pads and
slurries will enhance our ability to jointly market these products to our
existing and future customers.
 
                         CUSTOMERS, SALES AND MARKETING
 
   
     We primarily market our products directly to IC device manufacturers. For
the three months ended December 31, 1999, our five largest customers accounted
for approximately 53% of our revenue, with Intel accounting for approximately
14% of our revenue, Marketech accounting for approximately 15% of our revenue,
and Takasago accounting for approximately 11% of our revenue. For 1999, our five
largest customers accounted for approximately 58% of our revenue, with Intel
accounting for approximately 22% of our revenue, Marketech accounting for
approximately 15% of our revenue, and Takasago accounting for approximately 10%
of our revenue. Marketech and Takasago are distributors. We believe that in the
same year sales of our products to our five largest end user customers accounted
for approximately 45% of our revenue. We currently have a supply contract with
Intel for the supply of CMP slurry products over the three year period beginning
in January 1999 at specified prices.
    
 
     Our marketing begins with development teams who work closely with our
customers, using our research and development facilities, to design CMP slurry
products tailored to our customers needs. We then employ our applications teams
who work with customers to integrate our slurry products into customers'
manufacturing processes. Finally, we utilize our logistics and sales personnel
to ensure reliable supply, warehousing, packaging and inventory management.
Through our interactive approach, we build close relationships with our
customers across a variety of areas.
 
     We also market our products through independent distributors and other
industry suppliers. We currently utilize independent distributors in Europe,
Taiwan and Singapore, who add to our global presence by complementing our
support personnel already located in those regions. By using our relationships
with other suppliers in the CMP industry, such as suppliers of polishing
equipment, we obtain client leads and recommendations of our products.
 
                                       43

<PAGE>   45
 
     The IC device manufacturing industry is currently experiencing significant
growth in Asia. As a result, we have increased our focus on markets in Asia over
the last few years by increasing the number of account managers and applications
and customer support personnel present in this region. By building this regional
infrastructure, we have demonstrated a commitment to the Asian marketplace and
global expansion generally. We intend to make additional concentrated
investments in this region over the next few years.
 
                      CABOT AS OUR RAW MATERIALS SUPPLIER
 
   
     The base ingredients for most of our slurries are fumed metal oxides,
primarily fumed silica, which is an ultra-fine, high purity silica produced by a
flame process, and, to a much lesser extent, fumed alumina. Cabot is currently
our exclusive supplier of fumed metal oxides. Under our new fumed metal oxide
supply agreement with Cabot, which will become effective upon completion of this
offering, Cabot will continue to be our exclusive supplier of fumed metal
oxides, including fumed silica, for our existing slurry products. Although the
agreement does not require us to purchase fumed metal oxides from Cabot for
slurry products that we develop in the future, we expect that Cabot will be our
primary supplier of fumed metal oxides for these products as well.
    
 
     It is difficult to assess whether the prices we will pay to Cabot for fumed
metal oxides under our new agreement with Cabot are the same as or different
than the prices we could have obtained in arm's-length negotiations with an
unaffiliated third party in light of the long-term nature of the contract, the
volumes provided for under the agreement and our particular quality
requirements.
 
     Our agreement with Cabot contains the following terms with respect to fumed
silica:
 
   
- provisions for a fixed annual increase in the price of fumed silica of
  approximately 2% of the initial price and additional increases if Cabot's raw
  material costs increase;
    
 
   
- provisions requiring Cabot to supply us with fumed silica in volumes specified
  by us;
    
 
   
- provisions limiting Cabot's obligation to supply us with fumed metal oxides
  from each of its Tuscola, Illinois and Barry, Wales facilities to specified
  volumes from each facility;
    
 
   
- provisions requiring us to supply Cabot with quarterly, six-month, annual and
  18-month forecasts of our expected fumed silica purchases and limiting Cabot's
  obligations to provide us with fumed silica to specified percentages in excess
  of these forecasted volumes;
    
 
   
- provisions that limit the amount we can forecast for any month to an amount no
  greater than 20% of the forecasted amount for the previous month;
    
 
   
- provisions requiring us to purchase at least 90% of the six-month volume
  forecast and to pay specified damages to Cabot if we purchase less than that
  amount;
    
 
   
- provisions obligating us to pay all reasonable costs incurred by Cabot to
  provide quality control testing at levels greater than Cabot provides to its
  other customers; and
    
 
   
- provisions that generally prohibit us from reselling any fumed silica
  purchased from Cabot.
    
 
Under the new agreement, Cabot will also supply us with fumed alumina on terms
generally similar to those described above, except that the forecast
requirements do not apply to fumed alumina. The new agreement prohibits Cabot
from selling fumed metal oxides to third parties for use in CMP applications.
 
     Under the new agreement, Cabot warrants that its products will meet our
agreed upon product specifications. We have no right to any consequential,
special or incidental damages for breach of that warranty or any other provision
of the agreement. Cabot will be obligated to replace noncompliant products with
products that meet the agreed upon specifications. The new agreement also
provides that any change to product specifications for fumed metal oxides must
be by
 
                                       44

<PAGE>   46
 
mutual agreement. Any increased costs due to product specification changes will
be paid by us. If we require product specification changes that Cabot cannot
meet, we will have the right to purchase products meeting those specifications
from other suppliers.
 
     Historically, we did not provide detailed product specifications to Cabot
and Cabot permitted us to return some products even if they met our
specifications. Under our new agreement, we will provide detailed specifications
to Cabot and will have no contractual right to return products that meet these
specifications.
 
     The agreement has an initial term that expires in June 2005. Thereafter,
the agreement may be terminated by either party on June 30 or December 31 in any
year with at least 18 months prior written notice.
 
   
     It may be difficult to secure alternative sources of fumed metal oxides in
the event Cabot encounters supply or production problems or terminates or
breaches its agreement with us. A significant reduction in the amount of fumed
metal oxides supplied by Cabot, a problem with the quality of those fumed metal
oxides or a prolonged interruption in their supply by Cabot could interfere with
our ability to produce our CMP slurries in the quantities and of the quality
required by our customers and in accordance with their delivery schedules. See
"Risk Factors -- Risks Relating to Our Business -- Any problem or interruption
in our supply from Cabot of fumed metal oxides, our most important raw
materials, could delay our slurry production and adversely affect our sales".
    
 
DISPERSIONS SERVICES AGREEMENT WITH DAVIES
 
     Cabot has assigned to us a dispersions services agreement with Davies
Imperial Coatings, Inc. pursuant to which Davies produces slurries for us. Under
this agreement, we provide raw materials, primarily fumed silica, to Davies and
it performs dispersion services. The price for these services is set at a
negotiated price, subject to increases. We have agreed to purchase minimum
amounts of services for each year of the agreement. If Davies fails to supply us
with required dispersions services, we have the right to provide these services
for ourselves or purchase them from third parties. The agreement provides for
renegotiation of the price paid for dispersions services on each two-year
anniversary of the agreement in order to reflect changes in Davies'
manufacturing costs. We have also agreed to invest during each year $150,000 in
capital improvements, capacity expansions and other expenditures to maintain
capacity at the Davies dispersions facility in Hammond, Indiana. We own most of
the dispersions equipment at the Davies facility.
 
     Under the agreement, we must give Davies the opportunity to bid to provide
dispersion services for some of our products. Davies and its controlling
stockholders agree that, during the term of the agreement and for a period after
the termination of the agreement, they will not provide, nor assist any other
person or entity in providing, metal oxide dispersion services to any of our
competitors. Under some circumstances, we must pay these individuals
noncompetition payments on the date of the termination of the agreement and on
the first anniversary of the termination.
 
     The agreement has an initial term that expires in October, 2004, and is
automatically renewed for one-year periods thereafter, unless either party gives
written notice to the other of its intention to terminate the agreement at least
90 days prior to the expiration of the term.
 
                              DISPERSIONS SERVICES
   
                              AGREEMENT WITH CABOT
    
 
   
     Dispersions of fumed metal oxides are used in a variety of applications in
addition to CMP. These applications include paper applications and coatings such
as paints. In the past, Cabot has developed and sold fumed metal oxides
dispersions for these non-CMP applications, and intends to continue this
business after this offering and the expected spin-off. We performed dispersion
services for Cabot prior to our incorporation and Cabot intends to continue to
rely on us for these services in the future. Accordingly, we have entered into a
dispersions services agreement with Cabot, which will become effective upon
completion of this offering,
    
 
                                       45

<PAGE>   47
 
under which we will continue to offer fumed metal oxide dispersions services to
Cabot, including the manufacturing, packaging and testing of dispersions. Less
than 10% of our current dispersions capacity will be devoted to Cabot. The
agreement provides that some dispersion services may be subcontracted by us to
Davies but we will remain liable for these services. The dispersions services
that we will provide to Cabot must be performed at our facilities in Aurora,
Illinois and Barry, Wales or at the Davies facility. Under the agreement, Cabot
will supply us with the fumed metal oxide particles necessary for the
manufacture of the dispersions.
 
     Our agreement with Cabot contains the following terms:
 
   
- provisions for the pricing of dispersions services to be determined pursuant
  to a cost-plus formula;
    
 
   
- provisions limiting our obligation to provide Cabot with dispersions to stated
  maximum annual volumes for each of the three facilities;
    
 
   
- provisions requiring Cabot to supply us with quarterly, six-month, annual and
  18-month forecasts of their expected dispersions purchases and limiting our
  obligation to provide Cabot with dispersions to specified percentages in
  excess of these forecasted volumes;
    
 
   
- provisions that provide that if we develop any intellectual property in the
  course of performing dispersion services for Cabot, that intellectual property
  will be jointly owned by us and Cabot;
    
 
   
- provisions that provide that if we develop any intellectual property outside
  of performing dispersion services for Cabot and use that intellectual property
  in performing dispersion services for Cabot, then we are obligated to license
  Cabot that intellectual property in exchange for a royalty payment;
    
 
   
- provisions that generally prohibit Cabot from engaging a third party to
  provide dispersion services unless we are unable to supply the requested or
  agreed upon services, although Cabot retains the right to manufacture fumed
  metal oxide dispersions itself or have Davies provide these services; and
    
 
   
- provisions that generally prohibit us from performing dispersion services for
  third parties whose products compete with any Cabot product or from selling
  dispersion products in applications, other than CMP, that compete with any
  Cabot product.
    
 
   
     The agreement has an initial term that expires in June, 2005. Thereafter,
the agreement may be terminated by either party on June 30 or December 31 in any
year with at least 18 months prior written notice. If Cabot terminates the
agreement, Cabot cannot purchase fumed metal oxides dispersion services from one
of our competitors. If we terminate the agreement, Cabot may purchase fumed
metal oxide dispersions services from any party without restriction.
    
 
   
                            NEGOTIATIONS WITH CABOT
    
   
                   REGARDING FUMED ALUMINA SUPPLY ARRANGEMENT
    
 
   
     We have experienced increased demand for one of our CMP slurries for
polishing tungsten plugs and expect to experience in the future increased demand
for our CMP slurries for polishing copper wiring and conductive plugs. Fumed
alumina is an essential raw material for these slurries. We currently purchase
our fumed alumina from Cabot and expect to continue to do so after this offering
and the spin-off. In order to meet our anticipated future needs for fumed
alumina, Cabot needs to construct a new facility for the manufacture of fumed
alumina. We are currently in negotiations with Cabot regarding changes to our
fumed alumina supply arrangements. We have not reached final agreement with
Cabot on any of the terms of a new arrangement. Based on our negotiations to
date with Cabot, however, we expect that the price Cabot will charge us for
fumed alumina will be based on its fixed and variable costs for producing the
fumed alumina plus its capital costs for constructing the new facility plus an
agreed upon percentage of those costs. The payments in respect of the capital
costs will be amortized over a ten year period. Cabot estimates that the new
facility will cost between $4.5 million and $6.0 million. In addition, based on
our negotiations with
    
 
                                       46

<PAGE>   48
 
   
Cabot, we would expect that the new plant would be dedicated to satisfying our
fumed alumina requirements and that we would have a right of first option on all
production and capacity at the plant.
    
 
                            RESEARCH AND DEVELOPMENT
 
     We believe our future competitive position depends in part on our ability
to develop CMP applications tailored to our customers' needs. To this end, we
have established a technology center at our Aurora facility to provide
applications and product support to customers and to develop new products to
meet the needs of the semiconductor industry. The technology center is staffed
by a team that includes experts from the semiconductor industry and scientists
from key disciplines required for the development of high-performance CMP
products. The technology center is equipped with an advanced polishing and
metrology lab in a Class 10 clean room, a polishing lab in a Class 1000 clean
room, laboratories for product development and dispersion technology, and a
dispersions pilot plant. In our product development and dispersion technology
laboratory, our skilled technical personnel conduct kinetic studies of the
chemical reactions on the surface of the wafer. These kinetic data allow us to
adjust the composition of our slurries to avoid, among other things, non-uniform
polishing patterns. Understanding the chemical processes on the surface of the
polished wafer allows us to compose slurries specifically tailored to interact
with one element and to slow or essentially stop planarization as soon as this
particular element has been polished. We have also assembled dedicated
development teams that work closely with customers to identify their specific
technology and manufacturing challenges and to translate these challenges into
viable CMP process solutions.
 
     We have historically purchased most of the equipment we use for research
and development. In September 1998, we entered into an agreement with a customer
under which we lease some CMP equipment in exchange for CMP slurries. This
equipment includes five IC polishing machines, one hard disk drive polishing
machine and various metrology equipment. The cost of this equipment can be
significant and we need to upgrade our equipment periodically to keep pace with
equipment developments in the semiconductor industry.
 
     We expensed approximately $14.6 million for research and development in
1999. Investments in research and development equipment are capitalized over
their useful life and depreciated.
 
                             INTELLECTUAL PROPERTY
 
   
     Our intellectual property is important to our success and ability to
compete. We currently have ten U.S. patents and 31 pending U.S. patent
applications covering CMP products and processes. In most cases we file
counterpart foreign patent applications. Many of these patents are important to
our continued development of new and innovative CMP products. We attempt to
protect our intellectual property rights through a combination of patent,
trademark, copyright and trade secret laws, as well as employee and third-party
nondisclosure and assignment agreements. Our failure to obtain or maintain
adequate protection of our intellectual property rights for any reason could
have a material adverse effect on our business, results of operations and
financial condition.
    
 
   
     Significant litigation regarding intellectual property rights exists in our
industry. Cabot is currently involved in two separate legal actions brought
against it by Rodel alleging that Cabot is infringing some of Rodel's patents.
Although Cabot is the only named defendant in these lawsuits, we will agree to
indemnify Cabot for any and all losses and expenses arising out of this
litigation. For a further discussion of this litigation, see "-- Legal
Proceedings".
    
 
     We cannot be certain that other third parties will not make a claim of
infringement against us. Any claims, even those without merit, could be time
consuming to defend, result in costly litigation and/or require us to enter into
royalty or licensing agreements. These royalty or licensing agreements, if
required, may not be available to us on acceptable terms or at all. A successful
claim of infringement against us could adversely
 
                                       47

<PAGE>   49
 
affect our business, results of operations and financial conditions. See "--
Legal Proceedings".
 
     In addition, we have obtained a patent license from a third party covering
a polishing process used in the manufacturing of non-IC devices. Although we
expect to independently develop a new technology which will eliminate our need
for this licensed technology, there is no assurance that we will be successful
in doing so or that we will be able to continue to license this technology
beyond the eight years currently provided for in our license agreement.
 
                                  COMPETITION
 
   
     We are aware of only four other manufacturers with significant commercial
sales of CMP slurries for IC devices. We expect the competition to continue to
intensify. These manufacturers include Rodel, Fujimi, ChemFirst and Clariant. We
are aware of only three manufacturers with significant commercial sales of CMP
slurries for polishing the magnetic heads and the coating on the hard disks in
hard disk drives. These manufacturers include Rodel, Fujimi and Praxair. We may
also face competition from:
    
 
- other companies that develop CMP products;
 
- customers that currently have, or that may develop, in-house capacity to
  produce their own CMP products; and
 
- the development of polishing pads containing abrasives or other significant
  changes in technology.
 
   
     We compete primarily on the basis of our product design, level of service
and, to a lesser extent, price. We believe that we presently compete favorably
with respect to each of these factors. CMP products are evolving, however, and
we cannot give you any assurance that we will compete successfully in the
future. For a discussion of our market share of CMP slurries sold to IC device
manufacturers worldwide, see "-- Our Company".
    
 

                                   PROPERTIES
 
     Our principal U.S. facilities consist of:
 
   
- our global headquarters in Aurora, Illinois, comprising approximately 65,000
  square feet; and
    
 
   
- a commercial dispersions plant and technical center in Aurora, Illinois,
  comprising approximately 44,000 square feet.
    
 
     We are in the process of constructing an additional manufacturing and
distribution center in Aurora, Illinois. The initial phase of this construction
is planned to provide a facility of approximately 170,000 square feet that is
scheduled to be in operation by our third fiscal quarter of 2000.
 
   
     We also have a commercial dispersions plant in Geino, Japan, comprising
approximately 40,000 square feet. In addition, we will lease or sublease from
Cabot a dispersions facility in Barry, Wales. We are in the process of
constructing a distribution center in Ansung, South Korea. This approximately
16,000 square foot facility is scheduled for completion by the end of 2000.
    
 
     We believe that our current facilities are suitable and adequate for their
intended purposes and, together with our facilities under construction, provide
us with sufficient capacity to meet our current and expected demand in the
foreseeable future. However, if we were to encounter delays in the construction
of our new facilities, we may face capacity constraints.
 
                             ENVIRONMENTAL MATTERS
 
     Our facilities are subject to various environmental laws and regulations,
including those relating to air emissions, wastewater discharges, the handling
and disposal of solid and hazardous wastes, and occupational safety and health.
We believe that our facilities are in substantial compliance with applicable
environmental laws and regulations. Our facilities have incurred, and will
continue to incur, capital and operating expenditures and other costs in
complying with these laws and regulations in both the United States and abroad.
However, we do not anticipate that the future costs of environmental compliance
 
                                       48

<PAGE>   50
 
will have a material adverse effect on our business, financial condition or
results of operations.
 
                                   EMPLOYEES
 
   
     As of March 6, 2000, we employed a total of 269 individuals, including 24
in sales and marketing, 79 in research and development, 27 in administration and
139 in operations. None of our employees are covered by collective bargaining
agreements. We have not experienced any work stoppages and consider our
relations with our employees to be satisfactory.
    
 
                               LEGAL PROCEEDINGS
 
   
     In June 1998, one of our major competitors, Rodel Inc., filed a lawsuit
against Cabot in the United States District Court for the District of Delaware
entitled Rodel, Inc. v. Cabot Corporation (Civil Action No. 98-352). In this
lawsuit, Rodel has requested a jury trial and is seeking a permanent injunction
and an award of compensatory, punitive, and other damages relating to
allegations that Cabot is infringing United States Patent No. 4,959,113
(entitled "Method and Composition for Polishing Metal Surfaces"), which is owned
by an affiliate of Rodel. We refer to this patent as the Roberts patent and this
lawsuit as the Roberts lawsuit. Cabot filed an answer and counterclaim seeking
dismissal of the Roberts lawsuit with prejudice, a judgment that Cabot is not
infringing the Roberts patent and/or that the Roberts patent is invalid, and
other relief. Cabot subsequently filed a motion for a summary judgment that the
Rodel patent is invalid because all of the claims contained in the patent were
not sufficiently different under applicable patent law from subject matter
contained in previously granted patents, specifically United States Patents Nos.
4,705,566, 4,956,015 and 4,929,257, each of which is owned by a third party not
affiliated with Rodel or us. This motion was denied on September 30, 1999 based
on the court's finding that there were genuine issues of material fact to be
determined at trial. Although the Roberts lawsuit is presently in the discovery
stage and trial is scheduled to begin in November 2000, the trial date has not
yet been scheduled. After the ruling on the summary judgment motion, Rodel filed
a request for reexamination of the Roberts patent with the United States Patent
and Trademark Office, which was granted on November 12, 1999.
    
 
   
     In April 1999, Rodel commenced a second lawsuit against Cabot in the United
States District Court for the District of Delaware entitled Rodel, Inc. v. Cabot
Corporation (Civil Action No. 99-256). In this lawsuit, Rodel has requested a
jury trial and is seeking a permanent injunction and an award of compensatory,
punitive, and other damages relating to allegations that Cabot is infringing two
other patents owned by an affiliate of Rodel. These two patents are United
States Patent No. 5,391,258 (entitled "Compositions and Methods for Polishing")
and United States Patent No. 5,476,606 (entitled "Compositions and Methods for
Polishing"). We refer to these patents as the Brancaleoni patents and this
lawsuit as the Brancaleoni lawsuit. Cabot has filed an answer and counterclaim
to the complaint seeking dismissal of the complaint with prejudice, a judgment
that Cabot is not infringing the Brancaleoni patents and/or that the Brancaleoni
patents are invalid, and other relief. The Brancaleoni lawsuit is presently in
the discovery stage which is currently scheduled to be completed by February 25,
2000. Trial is presently scheduled to commence on December 4, 2000. The parties
have jointly requested that the court extend these dates.
    
 
     In the Roberts lawsuit, the only product that Rodel to date has alleged
infringes the Roberts patent is our W2000 slurry, which is used to polish
tungsten and which currently accounts for a significant portion of our total
revenue. In the Brancaleoni lawsuit, Rodel has not alleged that any specific
product infringes the Brancaleoni patents; instead, Rodel alleges that our
United States Patent No. 5,858,813 (entitled "Chemical Mechanical Polishing
Slurry for Metal Layers and Films" and which relates to a CMP polishing slurry
for metal surfaces including, among other things, aluminum and copper) is
evidence that Cabot is infringing the Brancaleoni patents through the
manufacture and sales of unspecified products. At this stage, we cannot predict
whether or to what extent Rodel will
 
                                       49

<PAGE>   51
 
make specific infringement claims with respect to any of our products other than
W2000 in these or any future proceedings. It is possible that Rodel will claim
that many of our products infringe its patents.
 
   
     Although Cabot is the only named defendant in these lawsuits, we will agree
to indemnify Cabot for any and all losses and expenses arising out of this
litigation as well as any other litigation arising out of our business. While we
believe there are meritorious defenses to the pending actions and intend to
defend them vigorously, these defenses may not be successful. If Rodel wins
either of these cases, we may have to pay damages and, in the future, may be
prohibited from producing any products found to infringe or required to pay
Rodel royalty and licensing fees with respect to sales of those products. In
addition, we may be subject to future infringement claims by Rodel or others
with respect to our products and processes. Such claims, even if they are
without merit, could be expensive and time consuming to defend and if we were to
lose any future infringement claims we could be subject to injunctions, damages
and/or royalty or licensing agreements. Royalty or licensing agreements, if
required as a result of any pending or future claims, may not be available to
use on acceptable terms or at all. Successful claims of infringement against us
could adversely affect our business, financial condition and results of
operations.
    
 
                                       50

<PAGE>   52
 

                                   MANAGEMENT
                        DIRECTORS AND EXECUTIVE OFFICERS
 
     The following table contains information regarding our executive officers
and directors.
 
   

<TABLE>
<CAPTION>
                    NAME                   AGE                         POSITIONS
    -------------------------------------  ---      -----------------------------------------------
    <S>                                    <C>      <C>
    Kennett F. Burnes                      56       Chairman of the Board
    Samuel W. Bodman                       61       Director
    William P. Noglows                     41       Director
    Juan Enriquez-Cabot                    40       Director designee
    John P. Frazee, Jr.                    55       Director designee
    Steven V. Wilkinson                    58       Director designee
    Matthew Neville                        46       President and Chief Executive Officer, Director
    William C. McCarthy                    56       Vice President and Chief Financial Officer
    Daniel J. Pike                         36       Vice President of Operations
    J. Michael Jenkins                     46       Vice President of Human Resources
    Bruce M. Zwicker                       47       Vice President of Sales and Marketing
    Chris C. Yu                            41       Technology and marketing specialist
</TABLE>

    
 
                            ------------------------
 
   
     KENNETT F. BURNES was elected Chairman of the Board of our company in
December 1999. He has served as Cabot's Chief Operating Officer since 1996 and
Cabot's President since 1995. He was elected a director of Cabot in 1992. Before
joining Cabot in 1987, Mr. Burnes was a partner at Choate, Hall & Stewart, a
Boston-based law firm, where he practiced corporate and business law for nearly
20 years. He received both his bachelor and law degrees from Harvard University.
    
 
     SAMUEL W. BODMAN was elected a director of our company in December 1999. He
has served as Cabot's Chairman and Chief Executive Officer since 1988. Before
joining Cabot, Mr. Bodman was President, Chief Operating Officer and a director
of FMR Corp., the holding company overseeing all activities of Fidelity
Investments. Mr. Bodman received his Ph.D. in chemical engineering from
Massachusetts Institute of Technology. In addition to serving on Cabot's board,
Mr. Bodman serves on the boards of John Hancock Mutual Life Insurance Company,
Security Capital Group Incorporated, Thermo Electron Corporation and Westvaco
Corporation.
 
   
     WILLIAM P. NOGLOWS was elected a director of our company in January 2000.
He has served as an Executive Vice President of Cabot since 1998 and serves as
Director of Global Manufacturing and General Manager of Carbon Black. From 1984
to 1998, he held various positions at Cabot, including General Manager of
Cabot's Cab-O-Sil Division and Managing Director of Cabot Australasia. Mr.
Noglows received his BS from Georgia Institute of Technology.
    
 
   
     JUAN ENRIQUEZ-CABOT will become a director of our company prior to the
closing of this offering. Since August 1997 Mr. Enriquez has been a researcher
at Harvard University's David Rockefeller Center. From August 1996 to August
1997 he was a senior researcher at Harvard Business School. From June 1996 to
August 1997 he was a fellow at Harvard University's Center for International
Affairs. From June 1994 through June 1996 he was a director of Democracy and
Development, a research institution in Mexico City, Mexico. He received both his
bachelor and MBA degrees from Harvard University.
    
 
   
     JOHN P. FRAZEE, JR. will become a director of our company prior to the
closing of this offering. Since June 1999 he has served as Chairman and Chief
Executive Officer of Paging Network, Inc. From August 1997 to June 1999 he
served as Chairman, President and Chief Executive Officer of Paging Network.
From September 1993 until August 1997 Mr. Frazee managed investments as a
private investor. From March 1993 until September 1993 he was President and
Chief Operating
    
 
                                       51

<PAGE>   53
 
   
Officer of Sprint Communications. In addition to serving on our board, Mr.
Frazee serves on the boards of Dean Foods Company, Homestead Village, Inc.,
Paging Network, Security Capital Group Incorporated and Vast Wireless Solutions.
Mr. Frazee received his bachelor degree in political science from Randolph-Macon
College.
    
 
   
     STEVEN V. WILKINSON will become a director of our company prior to the
completion of this offering. He has been retired since September 1998. Prior to
retirement, he worked for Arthur Andersen LLP, where he became a partner in
April 1974. Mr. Wilkinson received his BA in economics from DePauw University
and his MBA from the University of Chicago.
    
 
     MATTHEW NEVILLE has served as our President and Chief Executive Officer
since December 1999. He was elected a director of our company in December 1999.
Mr. Neville has served as a Vice President of Cabot since 1997 and as General
Manager of our company since 1996. From 1983 to 1996, Mr. Neville held various
positions at Cabot, including Director of Research and Development for the
Cabot's Cab-O-Sil Division. Mr. Neville received his Ph.D. in chemical
engineering from Massachusetts Institute of Technology.
 
   
     WILLIAM C. MCCARTHY has served as our Vice President and Chief Financial
Officer since December 1999. Mr. McCarthy has served as Chief Financial Officer
since February 1999. From August 1998 to February 1999, Mr. McCarthy was
pursuing personal interests and was not employed. From February 1976 to August
1998, Mr. McCarthy held various positions at Texas Instruments, including
controller of Texas Instruments' Corporate Services division. Mr. McCarthy
received his BS in business and his MBA from Texas A&M University.
    
 
   
     DANIEL J. PIKE has served as our Vice President of Operations since
December 1999. Mr. Pike served as our Director of Global Operations from August
1996 to December 1999. From June 1992 until August 1996, Mr. Pike worked for FMC
Corporation as a marketing manager for the Pharmaceutical Division. Mr. Pike
received his BS in chemical engineering from the University of Buffalo and his
MBA from Wharton School of Business of University of Pennsylvania.
    
 
   
     J. MICHAEL JENKINS has served as our Vice President of Human Resources
since December 1999. Mr. Jenkins has served as our Director of Human Resources
since May 1999. From August 1984 until May 1999, Mr. Jenkins was employed for 15
years by Gas Chromatography Division of Hewlett-Packard holding various
positions, including Human Resources and Quality Manager. Mr. Jenkins received
his MA in human resources from Lincoln University.
    
 
   
     BRUCE M. ZWICKER has served as our Vice President of Sales and Marketing
since December 1999. Mr. Zwicker has served as our Director, Global Business and
Sales from 1997 to December 1999. Since February 1988, Mr. Zwicker has held
various positions with Cabot, including Dispersion Products Line Manager. Prior
to joining Cabot, Mr. Zwicker worked for Unocal Corporation. Mr. Zwicker
received his BS in microbiology from Purdue University.
    
 
   
     CHRIS C. YU has served as a technology and marketing specialist since
January 2000. From December 1999 until January 2000, Mr. Yu served as our
Director of Research and Technology. After indicating his desire to leave our
company in January 2000, Mr. Yu decided to resign from that position but to
remain with our company and focus on product development of CMP slurries for
copper-based applications and technology-based applications for customers. From
1996 to December 1999, Mr. Yu served as our Director of Interconnect Technology.
From 1994 to 1996, Mr. Yu was employed by Rockwell International as Advanced
Process Methods principal engineer leading the development of planarization
technologies. Mr. Yu has also held various positions with Motorola and Micron
Technology. Mr. Yu received his Ph.D. in physics from Pennsylvania State
University.
    
 
                               BOARD OF DIRECTORS
 
     Our board of directors is currently composed of four directors. Prior to
the completion of this offering, we will increase our
 
                                       52

<PAGE>   54
 
board of directors to include three independent directors.
 
   
     We intend to amend our certificate of incorporation to divide the board of
directors into three classes: Class I, whose terms will expire at the annual
meeting of stockholders to be held in 2001, Class II, whose terms will expire at
the annual meeting of stockholders to be held in 2002, and Class III, whose
terms will expire at the annual meeting of stockholders to be held in 2003.
Messrs. Noglows and Enriquez-Cabot are or, upon their appointment, will be in
Class I. Messrs. Wilkinson and Burnes are or, upon their appointment, will be in
Class II. Messrs. Bodman, Frazee, and Neville are or, upon their appointment,
will be in Class III. At each annual meeting of stockholders beginning in 2001,
the successors to directors whose terms will then expire will be elected to
serve from the time of election and qualification until the third annual meeting
following election.
    
 
     In addition, our certificate of incorporation will provide that the
authorized number of directors may be changed only by resolution of the board of
directors. Any additional directorships resulting from an increase in the number
of directors will be distributed among the three classes so that, as nearly as
possible, each class will consist of one-third of the total number of directors.
 
                      COMMITTEES OF THE BOARD OF DIRECTORS
 
   
     The committees of our board of directors consist of an audit committee and
a compensation committee. The audit committee recommends the annual appointment
of our auditors with whom the audit committee reviews the scope of audit and
non-audit assignments and related fees, accounting principles we use in
financial reporting, internal auditing procedures and the adequacy of our
internal control procedures. The audit committee, which is a three member
committee, consists of Messrs. Enriquez-Cabot, Frazee, and Wilkinson. The
compensation committee reviews and approves the compensation and benefits for
our employees, directors and consultants, administers our employee benefit
plans, authorizes and ratifies stock option grants and other incentive
arrangements and authorizes employment and related agreements. The compensation
committee, which also has three members, consists of Messrs. Burnes, Frazee and
Wilkinson.
    
 
                           COMPENSATION OF DIRECTORS
 
   
     Directors who are also our employees receive no additional compensation for
their services as directors. Except as set forth below, each of our directors
who is not an employee of ours will receive:
    
 
   
- upon his original appointment or election as a director, options to purchase
  15,000 shares of our common stock which will vest over a three year period;
    
 
   
- on an annual basis, options to purchase 5,000 shares of our common stock which
  will vest over a four year period;
    
 
   
- a $10,000 annual fee;
    
 
   
- a $1,000 fee for attendance at each meeting of our board of directors or a
  committee of the board; and
    
 
   
- reimbursement of travel and other out-of-pocket costs incurred in attending
  meetings.
    
 
   
As long as Cabot controls us, any director who is also an employee of Cabot will
not be entitled to the $10,000 annual fee or the $1,000 fee for attendance at
board and committee meetings.
    
 
                               EXECUTIVE OFFICERS
 
     Our board of directors appoints our executive officers. Our executive
officers serve at the discretion of our board of directors.
 
                       COMPENSATION COMMITTEE INTERLOCKS
                           AND INSIDER PARTICIPATION
 
     In our fiscal year ended September 30, 1999, we did not have a compensation
committee or any other committee serving a similar function. Decisions as to the
compensation of executive officers were made by Cabot.
 

                             EXECUTIVE COMPENSATION
 
     The following table sets forth certain compensation information for the
Chief Executive Officer and our four other executive officers who, based on
employment with
 
                                       53

<PAGE>   55
 
Cabot, were the most highly compensated for the fiscal year ended September 30,
1999. All of the information in this table reflects compensation earned by the
listed individuals for services rendered to Cabot. In connection with this
offering, we have established employee benefit plans and arrangements so that,
following this offering, the compensation and employee benefits of our executive
officers and all of our other employees will be provided primarily by us. See
"--Compensation and Employee Benefit Plans" and "Relationships Between Our
Company and Cabot Corporation -- Employee Matters Agreement".
 
    SUMMARY COMPENSATION TABLE FOR THE FISCAL YEAR ENDED SEPTEMBER 30, 1999
 
   

<TABLE>
<CAPTION>
                                                                                LONG TERM
                                                                               COMPENSATION
                                               ANNUAL COMPENSATION             ------------
                                      --------------------------------------    RESTRICTED
                                                                OTHER ANNUAL      STOCK        ALL OTHER
NAME AND                                                        COMPENSATION     AWARD(S)     COMPENSATION
PRINCIPAL POSITIONS            YEAR   SALARY($)    BONUS($)         ($)           ($)(1)         ($)(2)
-------------------            ----   ----------   ---------    ------------   ------------   ------------
<S>                            <C>    <C>          <C>          <C>            <C>            <C>
Matthew Neville..............  1999    190,000      100,000                      378,000          28,929
  President and Chief
  Executive Officer
William C. McCarthy..........  1999    106,250       53,000(3)      82,711(4)    190,350(5)       10,102
  Vice President and Chief
  Financial Officer
Daniel J. Pike...............  1999    146,250       60,000                      170,100          18,453
  Vice President of
  Operations
Chris C. Yu..................  1999    162,637       65,000         45,000(6)    344,475(5)       21,078
  Former Director of Research
  and Technology
Bruce M. Zwicker.............  1999    132,728       48,000                       94,500          15,642
  Vice President of Sales and
  Marketing
</TABLE>

    
 
---------------
(1) The value of the shares of Cabot restricted stock set forth in the table was
    determined by subtracting the amount paid by the named executive officer to
    Cabot for the shares from the fair market value of the shares on the date of
    grant. The following named executive officers were granted the following
    shares of Cabot restricted stock in the fiscal year ended September 30, 1999
    under an equity incentive plan of Cabot: Mr. Neville, 20,000 shares; Mr.
    McCarthy, 7,500 shares; Mr. Pike, 9,000 shares; Mr. Yu, 15,000 shares; and
    Mr. Zwicker, 5,000 shares.
 
    The number of shares and value (calculated at fair market value as of
    September 30, 1999 ($23.75 per share), less the amount paid by the named
    executive officer for the shares) of all shares of Cabot restricted stock
    held by the named executive officers on September 30, 1999 (including the
    shares referred to in the column of the Table headed "Restricted Stock
    Award(s)"), were as follows: Mr. Neville, 44,000 shares ($589,750); Mr.
    McCarthy, 5,500 shares ($118,475); Mr. Pike, 15,500 shares ($210,275); Mr.
    Yu, 14,500 shares ($247,600); and Mr. Zwicker, 11,500 shares ($154,538).
 
    Except for a portion of the shares of Cabot restricted stock granted to Mr.
    McCarthy and Mr. Yu (see note 5 below), the restricted stock set forth in
    the table vests, in whole, three years from the date of grant. In accordance
    with Cabot's long-term incentive compensation program under its equity
    incentive plans, each of the named individuals paid to Cabot 30-40% of the
    fair market value of the shares of stock listed in this footnote on the date
    of grant. Some of the funds for the payment for this restricted stock were
    borrowed from Merrill Lynch Bank & Trust Co. by all of the named executive
    officers under a loan facility available to all recipients of restricted
    stock grants under this program. The recipients (including the named
    executive officers) borrowing funds from Merrill Lynch Bank & Trust are
    obligated to pay interest on the loans at the prime rate and to repay the
    funds borrowed. Shares purchased with borrowed funds must be pledged to
    Merrill Lynch Bank & Trust as collateral for the loans when the restrictions
    lapse. Cabot also guarantees payment of the loans in the event the
    recipients fail to honor their obligations. The loans are full recourse.
    Dividends are paid on the shares of restricted stock. In 1999, Cabot ceased
    using the loan facility, purchased the outstanding loan
 
                                       54

<PAGE>   56
 
   
    balance from Merrill Lynch Bank & Trust, and commenced to make loans under
    the program bearing interest at 6% per annum and otherwise on terms
    substantially identical to the bank loans.
    
 
(2) The information in the column headed "All Other Compensation" includes (a)
    matching contributions to Cabot's tax-qualified savings plan and accruals
    under a non-qualified supplemental savings plan, or CRISP, for the fiscal
    year ended September 30, 1999 and (b) contributions to Cabot's tax-qualified
    employee stock ownership plan and accruals under a supplemental employee
    stock ownership plan, or ESOP, for the fiscal year ended September 30, 1999
    on behalf of the named executive officers in the following amounts:
 

<TABLE>
<CAPTION>
             NAME                 CRISP      ESOP
             ----                 -----      ----
<S>                              <C>        <C>
Mr. Neville....................  $ 15,763   $13,166
Mr. McCarthy...................  $  5,180   $ 4,337
Mr. Pike.......................  $ 11,039   $ 6,723
Mr. Yu.........................  $ 11,961   $ 8,288
Mr. Zwicker....................  $  9,435   $ 5,572
</TABLE>

 
     Cabot provides Mr. Neville (but none of our other named executive officers)
     with death benefit protection in the amount of three times his salary,
     including $50,000 of group life insurance coverage. No amount has been
     included in the column headed "All Other Compensation" for this benefit
     because Cabot accrued no amount for the benefit and the benefit, other than
     the group life insurance (which is available to all Cabot employees in
     amounts determined by the level of their salaries), is not funded by
     insurance on Mr. Neville's life. Cabot funds the cost of the program
     generally by insurance on the lives of various other present and former
     Cabot employees. The value of this benefit, based upon the taxable income
     it would constitute if it were insurance, does not exceed approximately
     $1,500 per year for Mr. Neville. Cabot also provides our other named
     executive officers with death benefit protection in the amount of one times
     their salary. The value of this benefit to each of our named executive
     officers other than Mr. Neville (Mr. McCarthy, $585; Mr. Pike, $691; Mr.
     Yu, $829; and Mr. Zwicker, $636) is reflected in the column headed "All
     Other Compensation".
 
(3) This figure reflects a $10,000 sign-on bonus paid to Mr. McCarthy. Mr.
    McCarthy's hire date was February 2, 1999.
 
(4) This figure reflects reimbursement of relocation expenses.
 
(5) 6,000 of the 7,500 shares of Cabot restricted stock Mr. McCarthy received,
    and 6,000 of the 15,000 shares of Cabot restricted stock Mr. Yu received,
    were granted for no cash purchase price; Mr. McCarthy's 6,000 shares vest in
    equal increments in June, 1999, February, 2000 and February, 2001; Mr. Yu's
    6,000 shares vest annually as follows: one-half in November, 1998,
    one-quarter on November 15, 1999 and one-quarter on November 15, 2000.
 
   
(6) This figure reflects a reimbursement to Mr. Yu for income tax obligations on
    shares of restricted stock awarded to him.
    
 
  AGGREGATE OPTION EXERCISES FOR THE FISCAL YEAR ENDED SEPTEMBER 30, 1999 AND
                         FISCAL YEAR-END OPTION VALUES
 
     The following table sets forth information with respect to the exercise of
Cabot stock options by our named executive officers during 1999, the number of
unexercised Cabot stock options held by named executive officers on September
30, 1999, and the value of the unexercised in-the-money Cabot stock options on
that date.
 
   

<TABLE>
<CAPTION>
                                                           SECURITIES UNDERLYING         VALUE OF UNEXERCISED
                                                            UNEXERCISED OPTIONS         IN-THE-MONEY OPTIONS AT
                                                           AT FISCAL YEAR-END(#)         FISCAL YEAR-END($)(1)
                        SHARES ACQUIRED      VALUE      ---------------------------   ---------------------------
NAME                    ON EXERCISE(#)    REALIZED($)   EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
----                    ---------------   -----------   -----------   -------------   -----------   -------------
<S>                     <C>               <C>           <C>           <C>             <C>           <C>
Matthew Neville.......       2,400          37,275         5,000             --          80,031             --
Chris C. Yu...........          --              --            --          7,150              --             --
</TABLE>

    
 
---------------
   
(1) We determined the value of unexercised in-the-money options as of September
    30, 1999 by taking the difference between the fair market value of a share
    of Cabot common stock on September 30, 1999 ($23.75 per share) and the
    option exercise price, multiplied by the number of shares underlying the
    options as of that date. Options held by Mr. Yu were out of the money on
    that date, and we have therefore recorded no value for them.
    
 
                                       55

<PAGE>   57
 
                             PENSION PLAN BENEFITS
 
   
     Prior to this offering, our employees, including our named executive
officers, participated in Cabot's tax-qualified cash balance plan. This plan
provides retirement benefits to plan participants based on their compensation
and years of service, expressed as an account balance. In addition, prior to
this offering, some of our named executive officers participated in Cabot's
non-qualified supplemental cash balance plan, which provides supplemental
retirement benefits not available under the cash balance plan by reason of
limitations set by the Internal Revenue Code and the Employee Retirement Income
Security Act. We do not intend to sponsor a tax-qualified or a supplemental cash
balance plan, and, accordingly, all of our employees will stop accruing benefits
under these plans in connection with this offering.
    
 
                    COMPENSATION AND EMPLOYEE BENEFIT PLANS
 
     We have adopted and will adopt various employee benefit plans and
arrangements for the purpose of providing compensation and employee benefits to
our employees after this offering, including our executive officers. Some of
these plans are described below. These plans and arrangements include an equity
incentive plan, an employee stock purchase plan, a tax-qualified savings plan
and a non-qualified supplemental savings plan. To the extent necessary or
advisable under applicable law, Cabot, as our sole stockholder, will approve
these plans prior to this offering.
 
LONG-TERM INCENTIVES
 
     Prior to the completion of this offering, we will adopt the Cabot
Microelectronics Corporation 2000 Equity Incentive Plan, and Cabot, as our sole
stockholder, will approve the plan. The following description of certain
features of the plan is qualified in its entirety by reference to the full text
of the plan.
 
   
     Some of our employees (including our executive officers) hold options to
acquire Cabot common stock granted under Cabot's equity incentive plans. In
connection with the distribution, we and Cabot are considering giving these
employees the choice of retaining these awards or receiving, in consideration
for the cancellation of these awards, replacement awards under our 2000 Equity
Incentive Plan. These replacement awards will be subject to the same terms and
conditions as in effect prior to the cancellation of the prior Cabot awards,
except that (1) our common stock will be substituted for Cabot common stock
subject to the awards, and (2) the replacement awards will be adjusted to
preserve the intrinsic value to the holders immediately prior to cancellation of
the prior Cabot awards. Some of our employees also hold shares of Cabot
restricted stock, and we do not expect that these awards will be cancelled and
replaced with replacement awards.
    
 
   
     General; Shares Available for Issuance under the Plan.  The 2000 Equity
Incentive Plan will enable us to make awards of options and restricted stock
(including purchase restricted stock) to eligible employees, directors,
consultants and advisers of our company and our affiliates. We believe that the
plan will also provide us with flexibility in designing and providing incentive
compensation in order to attract and retain individuals who are in a position to
make significant contributions to our success, to reward individuals for past
contributions and to encourage individuals to take into account our long-term
interests through ownership of our common stock. Subject to adjustment for stock
splits and similar events, the maximum number of shares of common stock that may
be issued under the plan is 3.5 million shares. This number does not include
shares which will become available under the plan because of events such as
forfeitures, methods of cashless exercise and open market repurchases. Because
options issued under the plan will not be exercisable until after the spin-off,
the issuance of these options will not require us to issue any of our common
stock until that date. Awards of shares of our common stock, including
restricted stock, may be made by us under the plan. Prior to the spin-off,
however, we cannot issue any shares of our common stock if doing so would reduce
Cabot's percentage ownership in us to less than 80.5%.
    
 
   
     Administration; Eligible Grantees.  The 2000 Equity Incentive Plan will be
adminis-
    
 
                                       56

<PAGE>   58
 
   
tered by our full board or our compensation committee, consisting of at least
one member of our board of directors. However, if required by law, this
committee will consist of at least two members of our board, neither of whom may
be one of our employees. Officers and other key employees (including employees
of our subsidiaries) who are responsible for or contribute to the management,
growth or profitability of our business and the business of our subsidiaries are
eligible to receive awards under the plan, but no employee may receive awards
under the plan in any calendar year covering more than 300,000 shares of common
stock. Our directors, advisers and consultants, as well as individuals who are
employees of our affiliates, may also receive awards under the plan.
    
 
   
     Stock Options.  The compensation committee may grant stock options under
the 2000 Equity Incentive Plan. Stock options enable the holder of the option to
purchase shares of our common stock at a price specified by the compensation
committee at the time the award is made. The plan permits the granting of stock
options that qualify as incentive stock options under Section 422 of the
Internal Revenue Code and stock options that do not qualify for incentive stock
option treatment. The compensation committee determines the per share exercise
price of all stock options and, as a general rule, this price may not be less
than the fair market value of a share of common stock at the time of grant.
Options granted in connection with this offering will be granted at the initial
public offering price. Prior to the spin-off, the exercisability of vested stock
options will be limited so that Cabot's percentage ownership in us will not drop
below 80.5%. The compensation committee will determine when an option may be
exercised and its term, but the term may not exceed ten years.
    
 
     Restricted Stock.  The compensation committee may grant restricted stock
under the 2000 Equity Incentive Plan. In general, an award of restricted stock
entitles the recipient to shares of common stock, subject to restrictions
determined by the compensation committee. The compensation committee may require
the recipient to provide consideration for the restricted stock as a condition
to the grant of the restricted stock. Restrictions on restricted stock lapse as
specified by the compensation committee at the time of grant. Until the
restrictions lapse, shares of restricted stock are non-transferable. Recipients
of restricted stock have all rights of a stockholder with respect to the shares,
including voting and dividend rights, subject only to the conditions and
restrictions generally applicable to restricted stock or to other restrictions
and conditions specifically set forth in the award agreement.
 
   
     Effect of Termination of Employment.  As a general rule, the effect that a
termination of employment will have on a holder's awards will be set forth in
his or her award agreement. We expect that some terminations, such as
terminations upon death or for permanent disability, may result in the
accelerated vesting of options and the lapsing of restrictions on restricted
stock. We also expect that other terminations will result in the forfeiture of
unvested options and restricted stock.
    
 
   
     Adjustments for Changes in Capitalization; Change in Control.  The
compensation committee will make appropriate adjustments to the maximum number
of shares of common stock that may be delivered under the plan and to
outstanding awards to reflect stock dividends, stock splits, and similar changes
in capitalization. When granting awards under the plan, the compensation
committee may provide for the accelerated vesting of options, and for the
immediate lapsing of restrictions on restricted stock in the event of a "Change
in Control" (as defined in the plan).
    
 
   
     Amendment and Termination.  The compensation committee may at any time
discontinue granting awards under the plan. Our board of directors may at any
time amend the plan or terminate the plan as to any further grants of awards.
However, none of these actions may, without the approval of our stockholders,
increase the maximum number of shares of common stock available under the plan,
extend the time within which awards may be granted, or amend the provisions of
the plan relating to amendments. Nor may any of these actions adversely affect
the rights of a holder of any previously granted award.
    
 
                                       57

<PAGE>   59
 
   
                  GRANTS UNDER THE 2000 EQUITY INCENTIVE PLAN
    
 
   
     In connection with this offering, we intend to grant stock options to all
of our directors and employees, including our executive officers, under the 2000
Equity Incentive Plan. An aggregate of 935,800 shares of common stock are
issuable upon the exercise of these options, and the exercise price of these
options will be the initial public offering price. The following table sets
forth the number of shares of our common stock underlying these options:
    
 
   

<TABLE>
<CAPTION>
                                                               NUMBER OF SHARES
NAME AND POSITIONS                                            UNDERLYING OPTIONS
------------------                                            ------------------
<S>                                                           <C>
Matthew Neville.............................................         90,000
  President and Chief Executive Officer, Director
William C. McCarthy.........................................         36,000
  Vice President and Chief Financial Officer
Daniel J. Pike..............................................         45,000
  Vice President of Operations
J. Michael Jenkins..........................................         30,000
  Vice President of Human Resources
Bruce M. Zwicker............................................         36,000
  Vice President of Sales and Marketing
Executive officers as a group (5 persons)...................        237,000
Non-employee directors as a group (6 persons)...............        240,000
All employees as a group (269 persons)......................        695,800
</TABLE>

    
 
   
     In addition, we intend to grant options to acquire 257,300 shares of common
stock under the 2000 Equity Incentive Plan to Cabot employees who are not
directors of our company. The exercise price for these options will be the
initial public offering price.
    
 
   
     Up to one-third of the foregoing options to be granted to our employees and
directors will generally vest upon their grant and the balance of these options
will vest over a two to four year period. The foregoing options granted to Cabot
employees in their capacities as Cabot employees vest in their entirety upon
their grant.
    
 
ANNUAL INCENTIVES
 
     We intend to make annual cash bonuses to our employees, including our
executive officers, to provide them with an incentive to carry out our business
plan and to reward them for having done so. We intend to set performance goals
in each fiscal year at the beginning of the fiscal year, and we intend to base
the bonuses on an evaluation of our performance in the light of those goals.
 
EMPLOYEE STOCK PURCHASE PLAN
 
   
     Prior to the completion of this offering, we will adopt a 2000 Employee
Stock Purchase Plan, under which we have initially reserved for issuance 475,000
shares of our common stock, and Cabot, as our sole stockholder, will approve the
plan. We intend that the plan will become effective in connection with this
offering and that the first offering period under the plan will commence in
connection with this offering. We also intend that the plan will qualify as an
"employee stock purchase plan" under Section 423 of the Internal Revenue Code;
there may be offering periods under the plan, however, including the first
offering period, that do not qualify under Section 423.
    
 
   
     Administration; Eligible Employees.  The compensation committee will
administer the plan. The compensation committee, as plan administrator, will
have full authority to adopt administrative rules and procedures and to
interpret the provisions of the plan. Each of our full-time employees, and each
full-time employee of any future subsidiaries that we designate as eligible to
participate in the plan, will be eligible to participate in the plan. In
addition, the Internal Revenue Code requires us to exclude some employees from
participating in the plan and sets limits on how much common stock a participant
may
    
 
                                       58

<PAGE>   60
 
purchase under the plan, and we will comply with these exclusions and
limitations.
 
   
     Securities Subject to the Plan.  The plan limits the number of shares of
common stock initially reserved for issuance under the plan to 475,000 shares.
The shares issuable under the plan will be made available from authorized but
unissued shares of our common stock or from shares that we purchase on the open
market after this offering. We will prorate the shares to be issued in any
offering to the extent necessary to preserve the tax-free nature of the
spin-off. We cannot issue any shares of our common stock under the plan,
however, if doing so would reduce Cabot's percentage ownership in us to less
than 80.5%.
    
 
   
     Adjustments; Change in Control.  In the event that any change to the
outstanding common stock occurs (whether by reason of any recapitalization,
stock dividend, stock split, exchange or combination of shares or other change
in corporate structure), we will make appropriate adjustments to:
    
 
   
- the maximum number and class of securities issuable under the plan;
    
 
   
- the maximum number and class of securities purchasable per participant during
  any plan offering; and
    
 
   
- the number and class of securities and the price per share in effect under
  each outstanding purchase right.
    
 
     It is intended that any adjustments will prevent any dilution or
enlargement of rights under the plan. In the event of various corporate events
such as our dissolution or liquidation, or a merger, or a sale of all or
substantially all of our assets, the plan offering which would otherwise be in
effect on the date of the event will accelerate and will end on the last payday
before the date of the event. On that date, all outstanding purchase rights will
automatically be exercised.
 
   
     Plan Offering Periods and Purchase Rights.  The plan will offer shares of
common stock from time to time through a series of plan offerings, each with a
duration of approximately six months. (However, the first plan offering may be
slightly longer or shorter than six months, depending on when this offering
occurs.) The plan offerings will commence as designated from time to time by the
compensation committee. Each plan offering will in any event begin and end on a
business day. On the day a plan offering begins, each participant with respect
to that plan offering will receive a right to purchase shares of our common
stock through payroll deductions made during that plan offering. In general,
each participant may authorize periodic payroll deductions in an amount of
between one percent and ten percent of his or her gross cash compensation for
each pay period during the plan offering. A participant may elect to reduce or
increase future payroll deductions. The purchase date of shares under the plan
will occur on the day that the plan offering ends, and whole and deemed
fractional shares will be purchased using the aggregate payroll deductions
withheld from the participant for the plan offering. We will not issue
fractional shares under the plan. In general, a participant may withdraw from
the plan at any time by giving written notice.
    
 
   
     Plan Offering Price.  The price per share of common stock in any plan
offering will in general be 85% of the lower of:
    
 
   
- the fair market value per share of common stock on the day the plan offering
  begins; and
    
 
   
- the fair market value per share of common stock on the day the plan offering
  ends.
    
 
   
     The fair market value on the first day of the first offering period will be
the initial public offering price. Thereafter, the fair market value will be
determined by reference to the closing price of our common stock on the Nasdaq
on the relevant date.
    
 
     Amendment and Termination.  We may, in our sole discretion, terminate or
amend the plan, but the amendment and termination of the plan may not adversely
affect outstanding purchase rights without the consent of the holders of those
rights. If we terminate the plan, we may end a plan offering and accelerate the
exercise date of all outstanding purchase rights. We will refund (without
interest) any remaining payroll deductions after we terminate the plan.
 
                                       59

<PAGE>   61
 
     New Plan Benefits.  Because the benefits under the plan will depend on
elections to participate and the fair market value of our common stock on
various future dates, we cannot determine the benefits that our executive
officers and other employees may receive under the plan.
 
RETIREMENT BENEFITS
 
     We have adopted a tax-qualified savings plan for the benefit of our
employees, including our executive officers. Our employees will begin to
participate in this plan as of the first day of the month immediately following
the month in which the offering occurs. The savings plan will provide that we
will make discretionary contributions to participants' accounts, as well as cash
matching contributions in amounts based on participants' deferral elections. In
addition, we have adopted a non-qualified savings plan to provide supplemental
benefits to those employees who are affected by limits on compensation contained
in the Internal Revenue Code.
 
     We do not currently sponsor a tax-qualified or supplemental defined benefit
pension plan, and we do not currently have any intention to adopt such a plan.
 
EMPLOYMENT CONTRACTS, TERMINATION OF EMPLOYMENT AND CHANGE-IN-CONTROL
ARRANGEMENTS
 
     In connection with this offering and the spin-off, we expect to adopt
change-in-control arrangements covering our executive officers and other key
employees. These arrangements will likely provide for a cash severance payment,
continued medical benefits and other ancillary payments and benefits upon some
terminations of a covered employee's employment following a change in control.
Terminations of employment entitling a covered employee to these payments and
benefits will likely include (1) termination of the employee by us (or a
successor) other than for cause and (2) termination by the covered employee upon
reduction in compensation, duties or responsibilities, or relocation, or other
circumstances constituting constructive termination.
 
                                       60

<PAGE>   62
 
            RELATIONSHIPS BETWEEN OUR COMPANY AND CABOT CORPORATION
 
                      CABOT AS OUR CONTROLLING STOCKHOLDER
 
   
     Immediately prior to this offering, Cabot will be our sole stockholder.
Upon completion of this offering, Cabot will beneficially own 82.6% of the
outstanding shares of our common stock, or 80.5% if the underwriters' over-
allotment option is exercised in full. For as long as Cabot continues to
beneficially own more than 50% of the outstanding shares of common stock, Cabot
will be able to direct the election of all of the members of our board of
directors and exercise a controlling influence over our business and affairs,
including any determinations with respect to:
    
 
   
- mergers or other business combinations involving our company;
    
 
   
- the acquisition or disposition of assets by our company;
    
 
   
- the incurrence of indebtedness by our company;
    
 
   
- the issuance of any additional common stock or other equity securities; and
    
 
   
- the payment of dividends with respect to the common stock.
    
 
   
     Similarly, Cabot will have the power to:
    
 
   
- determine matters submitted to a vote of our stockholders without the consent
  of our other stockholders;
    
 
   
- prevent a change in control of our company; and
    
 
   
- take other actions that might be favorable to Cabot.
    
 
   
     Cabot has announced that after the offering it intends to distribute pro
rata to its stockholders all of the shares of common stock it owns by means of a
tax-free distribution. Cabot's final determination to proceed will require a
declaration of the spin-off by Cabot's board of directors. Such a declaration is
not expected to be made until certain conditions, many of which are beyond the
control of Cabot, are satisfied, including:
    
 
   
- receipt by Cabot of a ruling from the IRS as to the tax-free nature of the
  spin-off; and
    
 
   
- the absence of any change in future market or economic conditions (including
  developments in the capital markets) of Cabot's or our company's business and
  financial condition that causes Cabot's board of directors to conclude that
  the spin-off is not in the best interest of Cabot's stockholders.
    
 
   
We have been advised by Cabot that it expects the spin-off to occur six to
twelve months after the date of a private letter ruling from the IRS confirming
that the spin-off is tax-free to Cabot. If Cabot completes the spin-off, the
increased number of shares available in the market may have an adverse effect on
the market price of the common stock. See "Risk Factors -- Risks Relating to Our
Separation from Cabot".
    
 
     For a description of certain provisions of our certificate of incorporation
concerning the allocation of business opportunities that may be suitable for
both us and Cabot, see "Description of Capital Stock -- Corporate
Opportunities".
 
   
     For the purposes of governing some of the relationships between us and
Cabot following the spin-off and this offering, we and Cabot have entered or
will enter into commercial arrangements, principally the fumed metal oxide
supply agreement, the dispersions services agreement and the facilities lease
arrangements. In addition, we will enter into a master separation agreement
providing for the transfer of the assets and liabilities of our business, as
operated by Cabot, to us. We will also enter into a trademark license agreement
which will provide for the license to us by Cabot of some of its trademarks and
a confidential disclosure and license agreement that will provide for
confidential treatment of specified information, licenses for specified
intellectual property and the transfer of dispersion-related intellectual
property. Furthermore, we will also enter into various agreements with Cabot
regarding certain arrangements between the parties during the interim period
between the closing of this offering and the completion of the spin-off. These
agreements are the management services agreement, the initial public offering
and
    
 
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<PAGE>   63
 
   
distribution agreement, the employee matters agreement and the registration
rights agreement. In addition, we and Cabot will enter into a tax sharing
agreement to address the allocation of certain tax liabilities between the
parties.
    
 
   
     All of the foregoing agreements will be effective on or prior to the
completion of this offering. Because these agreements have been or will be
entered into at a time when we are or will be a wholly owned subsidiary of
Cabot, they are not or will not be the result of arm's-length negotiations
between the parties. These agreements have been or will be made in the context
of an affiliated relationship and negotiated in the overall context of our
separation from Cabot. The prices and other terms under these agreements may be
less favorable to us than what we could have obtained in arm's-length
negotiations with unaffiliated third parties for similar services or under
similar leases. It is particularly difficult to assess whether the price for
fumed metal oxides provided for under our fumed metal oxide supply agreement
with Cabot is the same as or different than the price we could have obtained in
arm's-length negotiations with an unaffiliated third party in light of the
long-term nature of the contract, the volumes provided for under the agreement
and our particular quality requirements.
    
 
   
     The agreements summarized below have been filed as exhibits to the
registration statement of which this prospectus forms a part. See "Where You Can
Find More Information".
    
 
                       COMMERCIAL ARRANGEMENTS WITH CABOT
 
FUMED METAL OXIDE SUPPLY AGREEMENT
 
     We have entered into a fumed metal oxide supply agreement with Cabot, which
will be effective upon the completion of this offering, under which Cabot will
continue to be our exclusive supplier of fumed silica and fumed alumina for
existing products and our primary supplier for future products. For a more
complete description of this agreement, see "Business -- Cabot as Our Raw
Materials Supplier".
 
DISPERSIONS SERVICES AGREEMENT WITH CABOT
 
   
     We have entered into a dispersions services agreement with Cabot, which
will be effective upon the completion of this offering, under which we will
continue to offer fumed metal oxide dispersions services to Cabot. For a more
complete description of this agreement, see "Business -- Dispersions Services
Agreement with Cabot".
    
 
FACILITIES LEASE ARRANGEMENTS
 
   
     We will enter into an agreement with Cabot to lease or sublease the land,
building and other improvements and fixtures at its dispersions facility in
Barry, Wales. This building space comprises approximately 62,300 square feet.
The lease payments will total approximately $0.4 million per year. This lease
will expire after ten years, subject to earlier termination in some
circumstances.
    
 
                          MASTER SEPARATION AGREEMENT
 
   
     To effect our separation from Cabot, Cabot and its subsidiaries will
transfer to us substantially all of the assets and liabilities of Cabot that are
used in, relate to or arise out of the business conducted by us as a division of
Cabot, including the assets and liabilities that are used in, relate to or arise
out of:
    
 
   
- all business operations whose financial performance is reflected in our
  financial statements for the period ended September 30, 1999 as set forth
  elsewhere in this prospectus, except for the fumed alumina plant at Cabot's
  Tuscola, Illinois facility and the land, building and other improvements and
  fixtures in Barry, Wales that we will lease or sublease from Cabot; and
    
 
- all business operations initiated or acquired by us after the date of those
  financial statements.
 
   
     We will assume and will agree to perform all liabilities and obligations of
Cabot relating to or arising out of these business operations any time on or
before the date of the transfer of these business operations to us, which we
refer to as the contribution date, other than various excluded liabilities.
These assumed liabilities include all liabilities relating to or
    
 
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<PAGE>   64
 
arising out of these business operations as conducted through the contribution
date that are unknown to Cabot and/or unrealized as of the contribution date and
that become known to Cabot or are realized or otherwise arise after the
contribution date.
 
   
     Except as expressly set forth in the master separation agreement or any
other agreement to be entered into between Cabot and us in connection with our
separation from Cabot, neither Cabot nor our company is making any
representation or warranty as to the business, assets or liabilities transferred
or assumed as part of the separation. Except as otherwise expressly set forth in
the separation agreement or in an ancillary agreement, all assets are being
transferred on an as is, where is, basis.
    
 
   
INTELLECTUAL PROPERTY
    
 
   
     Under the master separation agreement, Cabot will transfer to us its
intellectual property rights related solely to the business conducted by us as a
division of Cabot. This transferred intellectual property includes:
    
 
   
- patents;
    
 
   
- copyrights;
    
 
   
- trademarks;
    
 
   
- technology, know-how and trade secrets;
    
 
   
- licenses and other rights concerning third party technology and intellectual
  property; and
    
 
   
- the right to sue for infringements of these patents, copyrights, trademarks
  and other intellectual property.
    
 
   
Cabot will agree to assign to us various contracts with third parties relating
to our business.
    
 
   
FEES
    
 
   
     We will agree to pay the costs of the transfer of assets from Cabot to us,
including:
    
 
   
- moving expenses;
    
 
   
- transfer taxes;
    
 
   
- expenses related to notices to customers, suppliers and other third parties;
    
 
   
- fees related to the transfer or issuance of licenses, permits and franchises;
    
 
   
- fees related to the assignment or transfer of contracts, agreements and
  intellectual property;
    
 
   
- recording and other fees, taxes, charges and assessments related to the
  transfer of real property;
    
 
   
- costs related to the transfer or establishment of any domestic and foreign
  branch office; and
    
 
   
- costs related to the transfer of any employee.
    
 
INDEMNIFICATION
 
   
     Pursuant to the master separation agreement, we will agree to indemnify,
defend and hold harmless Cabot and each of its subsidiaries and their respective
successors-in-interest against any losses, claims, damages, liabilities or
actions arising out of or in connection with:
    
 
- the liabilities assumed by us as part of the separation, including any
  liabilities arising out of the current litigation with Rodel; and/or
 
- our conduct of our business and affairs after the contribution date.
 
   
     Cabot will agree to indemnify, defend and hold harmless us and each of our
subsidiaries and their respective successors-in-interest against any losses,
claims, damages, liabilities or actions, resulting from, relating to or arising
out of or in connection with:
    
 
- the excluded assets, meaning assets used or owned in connection with any
  businesses and operations of Cabot and its affiliates other than our business;
  and/or
 
- the excluded liabilities, including liabilities that are not incidental to or
  do not arise out of our business and various liabilities in respect of
  indebtedness, income taxes, employee or retirement benefit plans and other
  liabilities.
 
   
     Under the terms of the master separation agreement, we and Cabot, as
indemnifying parties, will have various rights. The indemni-
    
 
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<PAGE>   65
 
   
tee may defend and, with the consent of the indemnifying party, compromise and
settle a claim and will be entitled to reimbursement for its reasonable
attorneys' fees and expenses incurred in defending the claim and indemnification
for any liabilities incurred as a result of the claim.
    
 
   
     An indemnifying party may elect to defend, at its own expense and through
counsel chosen by it, any claim by a third party if the claim will, or is likely
to, obligate the indemnifying party to provide indemnification. If an
indemnifying party elects to defend a third-party claim, it will be required to
pay:
    
 
   
- the indemnitee's reasonable out-of-pocket expenses incurred in connection with
  its cooperation in the defense of the claim; and
    
 
   
- under some circumstances, the reasonable fees and expenses of separate counsel
  for the indemnitee, including primary counsel, local counsel and, in patent
  litigation, special patent counsel.
    
 
   
     If an indemnifying party elects to defend a third-party claim but, in the
reasonable judgment of an indemnitee, the indemnifying party fails to timely,
properly and adequately defend the third-party claim, the indemnitee may do so.
There will be restrictions on the ability of the indemnifying party to settle or
compromise a claim if the settlement or compromise would be harmful to the
indemnitee. The master separation agreement will specifically provide that until
we notify Cabot that we will assume the defense of the lawsuits instituted by
Rodel against Cabot, Cabot will continue to defend these lawsuits and we will
indemnify Cabot for any losses and expenses, including attorneys' fees, that it
incurs as a result of these actions. For a further discussion of the Rodel
lawsuits, see "Business -- Legal Proceedings".
    
 
   
     If an indemnitee recovers amounts from third parties, such as an insurance
company, these amounts will reduce the amount the indemnifying party must pay
unless the indemnitee or its affiliates remain directly or indirectly liable for
those amounts pursuant to self-insurance or re-insurance arrangements. If the
indemnitee incurs a net tax cost from the receipt of an indemnification payment,
the indemnifying party must compensate the indemnitee for the amount of the net
tax cost. If the indemnitee receives a net tax benefit from incurring or paying
for any indemnified loss or liability, the amount the indemnifying party must
pay will be reduced to take account of the net tax benefit.
    
 
   
DISPUTE RESOLUTION
    
 
   
     The master separation agreement will contain provisions that govern the
resolution of disputes, controversies or claims that may arise between us and
Cabot except to the extent otherwise provided for in any other agreement entered
into between Cabot and us in connection with our separation from Cabot. The
master separation agreement will provide that the parties will use all
commercially reasonable efforts to settle all disputes arising in connection
with the agreement without resorting to mediation, arbitration or otherwise. If
these efforts are not successful, either party may submit the dispute for non-
binding mediation. If mediation is not successful in resolving any dispute, any
party may resort to any remedies it may have at common law or otherwise,
including litigation. Neither party will be entitled to consequential, special,
exemplary or punitive damages.
    
 
FURTHER ASSURANCES
 
   
     In addition to the actions specifically provided for elsewhere in the
master separation agreement, each of our company and Cabot will agree to use all
commercially reasonable efforts to cause all actions, agreements and obligations
set forth in the master separation agreement to be performed.
    
 
   
                          TRADEMARK LICENSE AGREEMENT
    
 
   
     We will enter into a trademark license agreement with Cabot that will
govern our use of various trademarks used in our business. Under the agreement,
Cabot will grant to us a worldwide royalty-free license to use the trademarks
solely in connection with the manufacture, sale or distribution of products
related to our business. The license will include the right to use the term
"Cabot" as a trade name, either individually or in combination
    
 
                                       64

<PAGE>   66
 
   
with other terms. This license will include the right to grant sublicenses to
our wholly-owned subsidiaries, for so long as they remain wholly-owned
subsidiaries. We may not transfer or assign the license without Cabot's prior
written consent.
    
 
   
     Under the agreement, we will agree to refrain from various actions that
could interfere with Cabot's ownership of the trademarks. The agreement will
contain provisions regarding:
    
 
   
- the creation of quality standards for our products;
    
 
   
- the ability of Cabot to inspect our products and facilities; and
    
 
   
- our obligation to cease production of and correct or properly destroy, any
  products marketed under the licensed trademarks that fail to meet the quality
  standards.
    
 
   
     The agreement will provide that our license to use the trademarks may be
terminated for various reasons, including our discontinued use of the
trademarks, our breach of the agreement or a change in control of us.
    
 
   
     We will indemnify Cabot and its directors, officers and employees from
claims for damage or injury to persons or property or for loss of life or limb
if Cabot is found liable to any third party under any tort or products liability
or similar action in connection with the use by us of the licensed trademarks.
    
 
                         MANAGEMENT SERVICES AGREEMENT
 
   
     We and Cabot will enter into a management services agreement, to be
effective as of the date of this offering, pursuant to which Cabot will provide
administrative and corporate support services to us on an interim or
transitional basis, including human resource, accounting, treasury, tax,
facilities, legal and information services. Cabot will charge us for these
services at cost, including all out-of-pocket, third-party costs and expenses
incurred by Cabot in providing the services. If Cabot incurs third-party
expenses on behalf of us as well as a Cabot entity, Cabot will be required to
allocate these expenses in good faith between us and the Cabot entity, as Cabot
shall determine in the exercise of its reasonable judgment. The agreement will
provide for monthly invoicing of service charges. If we do not pay the invoiced
amount within 60 days following receipt of the invoice, we will be required to
pay interest at a specified rate, unless the invoiced amount is in dispute.
Cabot and we will be required to use reasonable efforts to resolve any disputes
promptly.
    
 
   
     The management services agreement will provide that the services provided
by Cabot will be substantially similar in scope, quality and nature to those
services provided to us prior to the contribution date. Cabot will also be
required to provide the services to us through the same or similarly qualified
personnel, but the selection of personnel to perform the various services will
be within the sole control of Cabot. In addition, Cabot will not be required to
materially increase the volume, scope or quality of the services provided beyond
the level at which they were performed for us in the past. The agreement will
provide that Cabot may cause any third party to provide any service to us that
Cabot is required to provide, but that Cabot will remain responsible for any
services it causes to be provided in this manner. Cabot will not be required to
provide any service to the extent the performance of the service becomes
impracticable due to a cause outside the control of Cabot, such as natural
disasters, governmental actions or similar events of force majeure. Similarly,
Cabot will not be required to provide any service if doing so would require
Cabot to violate any laws, rules or regulations. The agreement will also provide
that Cabot and we may agree to additional services to be provided by Cabot. The
terms and costs of these additional services will be mutually agreed upon by
Cabot and us. These additional services may include services that were not
provided to the Microelectronics Division of Cabot prior to the contribution
date.
    
 
   
     Pursuant to the management services agreement, we will agree to indemnify
and hold harmless Cabot, each of its subsidiaries and their directors, officers,
agents and employees from any claims, damages and expenses arising out of the
services rendered to us unless resulting from their breach of
    
 
                                       65

<PAGE>   67
 
   
contract, gross negligence or willful misconduct on their part. In addition, we
will agree that these same persons shall be liable to us only for any claims,
damages or expenses resulting from breach of contract, gross negligence or
willful misconduct on their part.
    
 
   
     The management services agreement will commence on the date of this
offering and will continue until the earlier of the date of the spin-off or two
years from the completion of this offering. Cabot and we may, by mutual
agreement, provide for the continuation of some services after the spin-off. In
addition, either Cabot or our company may terminate the management services
agreement with respect to one or more of the services provided under the
agreement:
    
 
   
- If the other party has failed to perform any material obligation relating to
  the terminated service; and
    
 
   
- if the failure continues for a period of 30 days after the other party
  receives notice of the failure from the terminating party.
    
 
   
                          CONFIDENTIAL DISCLOSURE AND
    
   
                               LICENSE AGREEMENT
    
 
   
     We and Cabot will enter into a confidential disclosure and license
agreement with respect to confidential and proprietary information, intellectual
property and other matters whereby we and Cabot will agree to keep confidential
and to cause our affiliates to keep confidential, and not to use for any
unauthorized purpose, confidential information regarding the other party.
Confidential information includes:
    
 
   
- unpublished technology and know-how;
    
 
   
- unpublished patent applications; and
    
 
   
- other confidential or proprietary technical and business information.
    
 
   
     Confidential information does not include any information that:
    
 
   
- is already known to the other party from a third-party source;
    
 
   
- is or becomes publicly known;
    
 
   
- is received from a third party without any obligations of confidentiality;
    
 
   
- is disclosed to a third party without restrictions;
    
 
   
- is independently developed by employees or consultants of the party receiving
  the information; or
    
 
   
- is approved for release by the disclosing party.
    
 
   
     Cabot will grant to us and our affiliates an ancillary license, which is a
fully paid, world-wide, non-exclusive license to Cabot's copyrights, patents and
technology that:
    
 
   
- are not included within the assets transferred under the master separation
  agreement;
    
 
   
- are owned by Cabot on the date of the transfer of assets to us;
    
 
   
- do not relate to (A) treated or untreated fumed metal oxide particles or the
  manufacture or treatment of these particles or (B) cesium chemicals or other
  products of Cabot's performance materials division or the manufacture of these
  chemicals;
    
 
   
- would be infringed or misappropriated by the manufacture, treatment,
  processing, handling, marketing, sale or use of any of our products, excluding
  treated or untreated fumed metal oxide particles and cesium chemicals or other
  products of Cabot's performance materials division; and
    
 
   
- were used by Cabot in connection with our activities, prior to our separation
  from Cabot.
    
 
   
     Cabot will agree, on behalf of itself and its affiliates, not to assert any
of the patents and copyrights in published copyrightable material licensed to us
under the ancillary license against our customers with respect to our customers'
use of products manufactured or supplied by us under the ancillary license. The
ancillary license will not include the right to grant sublicenses to others. We
will agree not to use the ancillary license in connection with any activity that
is competitive with any activity of Cabot.
    
 
   
     We will grant to Cabot and its affiliates a fully paid, world-wide,
non-exclusive license to copyrights, patents and technologies that are among the
assets transferred to us under
    
 
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<PAGE>   68
 
   
the master separation agreement and that would be infringed by the manufacture,
treatment, processing, handling, marketing, sale or use of any products or
services sold by Cabot for applications other than CMP. We will agree, on our
own behalf and on behalf of our affiliates, not to assert any of the patents and
copyrights in published copyrightable material licensed to Cabot under the
license to Cabot against Cabot's customers with respect to their use of non-CMP
products manufactured or supplied by Cabot under the license to Cabot. The
license to Cabot will not include the right to grant sublicenses to others.
Cabot will agree not to use the license in connection with any activity that is
competitive with any of our activities.
    
 
   
     We will also agree, on our own behalf and on behalf of our affiliates, not
to use specific information in our possession as of the date of the transfer of
assets to us for the manufacture of treated or untreated fumed metal oxide
particles and/or cesium chemicals and other products of Cabot's performance
materials division. This specific information is information concerning:
    
 
   
- Cabot's fumed metal oxide products (treated and untreated) and related
  manufacturing or treatment processes;
    
 
   
- cesium chemicals and other products of Cabot's performance materials division
  and related manufacturing processes; and
    
 
   
- the raw materials, suppliers or equipment used in these products, processes
  and chemicals, including product specifications.
    
 
   
     Additionally, Cabot will assign to us an undivided one-half interest in and
to various patents, copyrights and technology that relate to dispersion
technology, which are owned by Cabot and used in Cabot's dispersion business and
our business. We will generally pay all costs associated with the transfer to us
of this intellectual property. Cabot and we will generally share the costs
associated with the prosecution and maintenance of these patents. Cabot and/or
we, individually or jointly, may bring enforcement proceedings against an
infringer of this dispersion intellectual property. Cabot and we will agree to
notify the other party of any threat or allegation made by a third party that
any dispersion intellectual property infringes any third-party intellectual
property rights.
    
 
   
     Cabot and we will agree to restrictions on sublicenses and assignments of
the dispersion technology assets. Cabot will agree not to sublicense or assign
the dispersion technology assets, including related intellectual property
rights, to any party for use in the production or sale of products for use in
CMP applications, without our prior consent. We will agree not to sublicense or
assign the dispersion technology assets, including related intellectual property
rights, to any party for use in the production or sale of products for use in
non-CMP applications, without the prior consent of Cabot.
    
 
                          INITIAL PUBLIC OFFERING AND
                             DISTRIBUTION AGREEMENT
 
GENERAL
 
   
     We will enter into an initial public offering and distribution agreement
with Cabot, which will be effective as of the closing of this offering,
governing our respective rights and duties with respect to this offering and the
spin-off. Cabot has announced that it plans to complete the spin-off within six
to twelve months after the date of a private letter ruling from the IRS
confirming that the spin-off is tax-free to Cabot. However, Cabot is not
obligated to complete the spin-off in this time frame or at all. We will agree
to cooperate with Cabot in all respects to complete the spin-off. See "Risk
Factors -- Risks Relating to Our Separation from Cabot".
    
 
COVENANTS
 
   
     After this offering, Cabot will continue to own a significant portion of
our common stock. As a result, Cabot will continue to include us as a subsidiary
for various financial reporting, accounting and other purposes. Accordingly, we
will agree to certain covenants in the initial public offering and distribution
agreement, which will be binding on us as long as Cabot owns at least 50% of our
    
 
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<PAGE>   69
 
outstanding common stock. Some of these covenants are described below:
 
   
- Covenants Regarding the Incurrence of Debt. We will not, and will not permit
  any of our subsidiaries to create, incur or assume any indebtedness in excess
  of an aggregate of $50.0 million outstanding at any time.
    
 
   
- Other Covenants.  We will also agree that:
    
 
     - we will not take any action which would have the effect of limiting
       Cabot's ability to freely sell, pledge or otherwise dispose of shares of
       our common stock or limiting the legal rights of or denying any benefit
       to Cabot as our stockholder in a manner not applicable to our
       stockholders generally;
 
   
     - we will not amend our stockholder rights plan, or any successor plan, in
       a manner that would result in Cabot's ownership of our common stock
       causing the rights to detach or become exercisable as described under
       "Description of Capital Stock -- Rights Plan";
    
 
   
     - we will not issue any shares of common stock or any rights, warrants or
       options to acquire our common stock, if after giving effect to such
       issuance Cabot would own less than 80.5% of the then outstanding shares
       of our common stock; and
    
 
   
     - if Cabot determines that, due to any action on our part, its shareholding
       in us has dropped or will drop below 80.5%, it can require us to reverse
       or terminate the action, issue additional equity securities to it at no
       cost to Cabot or purchase additional equity securities of us in the open
       market or from other third parties, in which case we would have to
       reimburse Cabot for the costs incurred by Cabot in making such a
       purchase.
    
 
   
     In addition, we will agree that, for so long as Cabot is required to
consolidate our results of operations and financial position or account for its
investment in our company, we will provide Cabot financial information regarding
our company and our subsidiaries, consult with Cabot regarding the timing and
content of our earnings releases and cooperate fully with Cabot in connection
with its public filings.
    
 
INDEMNIFICATION
 
   
We will generally agree to indemnify Cabot and its affiliates against all
liabilities arising out of:
    
 
   
- any breach by us or our affiliates of any of the provisions of the initial
  public offering and distribution agreement;
    
 
   
- any incorrect or incomplete financial information provided by us or our
  affiliates to Cabot as required by the initial public offering and
  distribution agreement; and
    
 
   
- any material untrue statements or omissions in this prospectus and the
  registration statement of which it is a part and in any and all registration
  statements, information statements and/or other documents filed with the SEC
  in connection with the spin-off.
    
 
   
     Cabot will agree to indemnify us and our affiliates against all liabilities
arising out of:
    
 
   
- any breach by Cabot or its affiliates of any of the provisions of the initial
  public offering and distribution agreement;
    
 
   
- any incorrect or incomplete financial information provided by Cabot or its
  affiliates to us as required by the initial public offering and distribution
  agreement; and
    
 
   
- any material untrue statements or omissions regarding Cabot in this prospectus
  and the registration statement of which it is a part and in any and all
  registration statements, information statements and/or other documents filed
  with the SEC in connection with the spin-off.
    
 
   
     Under the terms of the initial public offering and distribution agreement,
Cabot and we, as indemnifying parties, will have various rights. The indemnitee
may defend and, with the consent of the indemnifying party, compromise and
settle a claim and will be entitled to reimbursement for its reasonable
attorneys' fees and expenses incurred in
    
 
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<PAGE>   70
 
   
defending the claim and indemnification for any liabilities incurred as a result
of the claim.
    
 
   
     An indemnifying party may elect to defend, at its own expense and through
counsel chosen by it, any claim by a third party if the claim will obligate the
indemnifying party to provide indemnification. If an indemnifying party elects
to defend a third-party claim, it will be required to pay:
    
 
   
- the indemnitee's reasonable out-of-pocket expenses incurred in connection with
  its cooperation in the defense of the claim; and
    
 
   
- under some circumstances, the reasonable fees and expenses of separate counsel
  for the indemnitee, including primary counsel and local counsel.
    
 
   
     There will be restrictions on the ability of the indemnifying party to
settle or compromise a claim if the settlement or compromise would be harmful to
the indemnitee.
    
 
   
     If Cabot and we both claim to be entitled to indemnification for a
third-party claim, Cabot and we will jointly control the defense of the claim.
If one party fails to defend jointly, the other party will solely defend the
claim, but in no case will one party compromise or settle a third-party claim
without the consent of the other party. All expenses of either party during the
joint defense of a claim will be initially paid by the party incurring the
expenses, with the expenses reallocated and reimbursed in accordance with the
indemnification obligations of the parties at the end of the defense of the
claim.
    
 
   
     If an indemnitee recovers amounts from third parties, such as an insurance
company, these amounts will reduce the amount the indemnifying party must pay
unless the indemnitee or its affiliates remain directly or indirectly liable for
those amounts pursuant to self-insurance or re-insurance arrangements. If the
indemnitee incurs a net tax cost from the receipt of an indemnification payment,
the indemnifying party must compensate the indemnitee for the amount of the net
tax cost. If the indemnitee receives a net tax benefit from incurring or paying
for any indemnified loss or liability, the amount the indemnifying party must
pay will be reduced to take account of the net tax benefit.
    
 
EXPENSES
 
     We will pay the costs and expenses incurred in connection with our
separation from Cabot and this offering including the costs and expenses of
financial, legal, accounting and other advisers, if any. Cabot will pay the
costs and expenses incurred in connection with the spin-off, including the costs
and expenses of financial, legal, accounting and other advisors, if any.
 
                             TAX SHARING AGREEMENT
 
   
     We are, and after this offering but prior to the spin-off will continue to
be, included in Cabot's consolidated federal income tax group, and our federal
income tax liability will be included in the consolidated federal income tax
liability of Cabot. We and Cabot will enter into a tax sharing agreement
pursuant to which the amount of taxes to be paid or received by us with respect
to consolidated or combined returns of Cabot in which we are included generally
are determined as though we file separate federal, state, local and foreign
income tax returns. Under the terms of the tax sharing agreement, Cabot will not
be required to make any payment to us for the use of our tax attributes that
come into existence prior to the spin-off until such time as we would otherwise
be able to utilize such attributes.
    
 
   
     Under the agreement, until the spin-off, Cabot will:
    
 
- continue to have all the rights of a parent of a consolidated group;
 
- have sole and exclusive responsibility for the preparation and filing of
  consolidated federal and consolidated or combined state, local and foreign
  income tax returns (or amended returns); and
 
- have the power, in its sole discretion, to contest or compromise any asserted
  tax adjustment or deficiency and to file, litigate or compromise any claim for
  refund relating to these returns.
 
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<PAGE>   71
 
   
     In general, the agreement will provide that we will be included in Cabot's
consolidated group for federal income tax purposes for so long as Cabot
beneficially owns at least 80% of the total voting power and value of the
outstanding common stock, which we expect will be the case until the time of the
spin-off. Each member of a consolidated group is jointly and severally liable
for the federal income tax liability of each other member of the consolidated
group. Accordingly, although the tax sharing agreement will allocate tax
liabilities between us and Cabot during the period in which we are included in
Cabot's consolidated group, we could be liable in the event that any federal tax
liability is incurred, but not discharged, by any other member of Cabot's
consolidated group. See "Risk Factors -- Risks Relating to Our Separation from
Cabot -- We face risks associated with being a member of Cabot's consolidated
group for federal income tax purposes".
    
 
   
     Under the terms of the tax sharing agreement, we will agree to indemnify
Cabot in the event that the spin-off is not tax free to Cabot as a result of
various actions taken by or with respect to us or our failure to take various
actions.
    
 
                         REGISTRATION RIGHTS AGREEMENT
 
   
     Although Cabot has announced its plans to complete the spin-off within six
to twelve months after the date of a private letter ruling from the IRS
confirming that the spin-off is tax-free to Cabot, we cannot assure you that the
spin-off will occur within this time frame or at all. See "Risk Factors -- Risk
Factors Relating to Our Separation from Cabot". In the event that Cabot does not
complete the spin-off, Cabot could not freely sell all of our shares that it
owns without registration under the Securities Act.
    
 
   
     Accordingly, we will enter into a registration rights agreement with Cabot
to provide it with registration rights relating to the shares of our common
stock which it holds. These registration rights generally become effective at
such time as Cabot informs us that it no longer intends to proceed with or
complete the spin-off. Cabot will be able to require us to register under the
Securities Act all or any portion of our shares covered by the registration
rights agreement. In addition, the registration rights agreement will provide
for various piggyback registration rights for Cabot. Whenever we propose to
register any of our securities under the Securities Act for ourselves or others,
subject to certain customary exceptions, we will be required to provide prompt
notice to Cabot and include in that registration all shares of our stock which
Cabot requests to be included.
    
 
   
     The registration rights agreement will set forth customary registration
procedures, including a covenant by us to make available our employees and
personnel for road show presentations. All registration expenses incurred in
connection with the registration rights agreement will be paid by us. In
addition, we will be required to reimburse Cabot for the fees and disbursements
of its outside counsel retained in connection with any such registration. The
registration rights agreement will also impose customary indemnification and
contribution obligations on us for the benefit of Cabot and any underwriters
with respect to liabilities resulting from untrue statements or omissions in any
registration statement used in any such registration, although Cabot must
indemnify us for those liabilities resulting from information provided by Cabot.
    
 
   
     The registration rights under the registration rights agreement will remain
in effect with respect to the shares covered by the agreement until:
    
 
   
- those shares have been sold pursuant to an effective registration statement
  under the Securities Act;
    
 
   
- those shares have been sold to the public pursuant to Rule 144 under the
  Securities Act;
    
 
   
- those shares have been transferred and new certificates delivered, where the
  new certificates do not bear a legend restricting further transfer and where
  subsequent public distribution of those shares does not require registration
  under the Securities Act; or
    
 
   
- those shares cease to be outstanding.
    
 
                                       70

<PAGE>   72
 
                           EMPLOYEE MATTERS AGREEMENT
 
   
     We and Cabot will enter into an employee matters agreement that sets forth
our mutual understanding with respect to the responsibilities, obligations and
liabilities relating to the compensation and benefits of our employees in
connection with the offering and spin-off. Under this agreement, with certain
exceptions, we will be solely responsible for the compensation and benefits of
our employees on and following the offering. The principal exception to this
rule is retirement benefits for our employees; Cabot's tax-qualified retirement
plans will retain all assets and liabilities relating to our employees on and
after this offering (subject to any distributions from the plans that are
required or permitted by the plans and applicable law). The employee matters
agreement will also provide that equity awards granted to our employees under
Cabot's equity incentive plans when they were employees of Cabot may be
converted into equity awards of our company upon agreement between Cabot and us.
    
 
                        OPTION GRANTS TO CABOT EMPLOYEES
 
     We intend to grant options under the 2000 Equity Incentive Plan to Cabot
employees. See "Management -- Grants Under the 2000 Equity Incentive Plan".
 
                                       71

<PAGE>   73
 
           SECURITY OWNERSHIP OF PRINCIPAL STOCKHOLDER AND MANAGEMENT
 
                             PRINCIPAL STOCKHOLDER
 
   
     The following table sets forth information with respect to beneficial
ownership of common stock by Cabot as of February 29, 2000 and as adjusted to
reflect the sale of the shares of common stock offered by us in this offering.
Cabot is the only person or entity that owns beneficially more than 5% of the
outstanding shares of common stock.
    
 
   

<TABLE>
<CAPTION>
                                                                                   PERCENTAGE OF
                                                                                    OUTSTANDING
                                                                                      SHARES
                                                                                BENEFICIALLY OWNED
                                                               SHARES OF        -------------------
NAME AND ADDRESS                                              COMMON STOCK       BEFORE     AFTER
OF BENEFICIAL OWNER                                        BENEFICIALLY OWNED   OFFERING   OFFERING
-------------------                                        ------------------   --------   --------
<S>                                                        <C>                  <C>        <C>
Cabot Corporation.......................................       18,989,744         100%      82.6
  75 State Street
  Boston, Massachusetts
</TABLE>

    
 

                                   MANAGEMENT
 
   
     The following table sets forth information regarding beneficial ownership
of the outstanding common stock of Cabot as of February 29, 2000 by (a) each of
our directors and each of the executive officers named in the Summary
Compensation Table and (b) all of our directors and executive officers as a
group. The number of shares of common stock shown below includes shares issuable
upon the exercise of stock options and, for each person who is a participant in
Cabot's employee stock plan, shares issuable upon conversion of shares of
Cabot's convertible preferred stock allocated to such participant's account
under Cabot's employee stock plan.
    
 
   
     As used in this table, "beneficial ownership" means the sole or shared
power to vote or direct the voting or to dispose or direct the disposition of
any security. A person is deemed to be the beneficial owner of securities that
can be acquired within 60 days from the date of this prospectus through the
exercise of any option, warrant or right. Shares of common stock subject to
options, warrants or rights that are currently exercisable or exercisable within
60 days are deemed outstanding for computing the ownership percentage of the
person holding such options, warrants or rights, but are not deemed outstanding
for computing the ownership percentage of any other person. The amounts and
percentages are based upon 66,909,163 shares of Cabot common stock outstanding
as of February 29, 2000.
    
 
   

<TABLE>
<CAPTION>
                                                        PERCENTAGE
                                                        OWNERSHIP                         PERCENTAGE
                                      SHARES OF           OF OUR       SHARES OF CABOT     OWNERSHIP
NAME                               OUR COMMON STOCK      COMPANY        COMMON STOCK       OF CABOT
----                               ----------------     ----------     ---------------    ----------
<S>                                <C>                <C>              <C>                <C>
Kennett F. Burnes(1).............         --               --               548,717             *
Samuel W. Bodman(2)..............         --               --             1,481,464           2.2
William P. Noglows(3)............         --               --               126,900             *
Matthew Neville(4)...............         --               --                77,830             *
William C. McCarthy..............         --               --                 6,129             *
Daniel J. Pike...................         --               --                17,583             *
Chris C. Yu......................         --               --                19,948             *
Bruce M. Zwicker.................         --               --                25,288             *
All directors and executive
  officers as a group (8
  persons)(5)....................         --               --             2,287,753           3.4
</TABLE>

    
 
---------------
   
 *  Denotes less than 1% beneficial ownership.
    
 
   
(1) Includes 148,986 shares of Cabot common stock that Mr. Burnes has the right
    to acquire pursuant to stock options.
    
 
                                       72

<PAGE>   74
 
   
(2) Includes 41,725 shares of Cabot common stock that Mr. Bodman has the right
    to acquire pursuant to stock options.
    
 
   
(3) Includes 22,186 shares of Cabot common stock that Mr. Noglows has the right
    to acquire pursuant to stock options.
    
 
   
(4) Includes 5,000 shares of Cabot common stock that Mr. Neville has the right
    to acquire pursuant to stock options.
    
 
   
(5) Excludes shares of Cabot common stock beneficially owned by Mr. Yu, our
    former Director of Research and Technology.
    
 
                                       73

<PAGE>   75
 

                          DESCRIPTION OF CAPITAL STOCK
 
     We intend to amend our certificate of incorporation and bylaws upon the
completion of this offering. The forms of our amended certificate of
incorporation and bylaws will be filed as exhibits to the registration statement
of which this prospectus is a part. The following summarizes the terms and
provisions of our capital stock upon the closing of this offering. The summary
is not complete, and you should read the forms of our certificate of
incorporation and bylaws.
 
   
     Upon the completion of this offering, our authorized capital stock will
consist of 200 million shares, $0.001 par value per share, of common stock and
20 million shares, par value $0.001 per share, of preferred stock.
    
 
                                  COMMON STOCK
 
   
     Each share of our common stock will be identical in all respects. Each of
these shares will entitle its holder to the same rights and privileges enjoyed
by all other holders of common stock and will subject them to the same
qualifications, limitations and restrictions to which all other holders of
common stock will be subject. Holders of our common stock will be entitled to
one vote per share on all matters to be voted on by our stockholders. Holders of
common stock will not have cumulative rights, so that holders of a majority of
the shares of common stock present at a meeting at which a quorum is present
will be able to elect all of our directors eligible for election in a given
year. The holders of a majority of the voting power of the issued and
outstanding common stock will constitute a quorum. Holders of our common stock
will be entitled to receive ratably the dividends, if any, that are declared by
our board of directors. Our board of directors may declare dividends out of
funds legally available for the declaration of dividends, subject to the
preferential rights of any holder of preferred stock that may from time to time
be outstanding. Upon our liquidation, dissolution or winding up, the holders of
our common stock will be entitled to share pro rata in the distribution of all
of our assets available for distribution after satisfaction of all of our
liabilities and the payment of the liquidation preference of any preferred stock
that may be outstanding. The holders of our common stock will have no preemptive
or other subscription rights to purchase common stock, and there will be no
redemptive rights or sinking fund provisions.
    
 
                                PREFERRED STOCK
 
   
     Our board of directors will be authorized to cause shares of preferred
stock to be issued in one or more series, to:
    
 
   
- determine the number of shares of each series;
    
 
   
- fix the rights, powers, preferences and privileges of each series;
    
 
   
- fix any qualifications, limitations or restrictions thereon; and
    
 
   
- increase or decrease the number of shares of each such series.
    
 
     Among the specific matters that may be determined by the board of directors
are:
 
   
- the annual rate of dividends;
    
 
   
- the redemption price, if any;
    
 
   
- the terms of a sinking or purchase fund, if any;
    
 
   
- the amount payable in the event of any voluntary liquidation, dissolution or
  winding up of the affairs of our company;
    
 
   
- conversion rights, if any; and
    
 
   
- voting powers, if any.
    
 
     Depending upon the terms of the preferred stock established by our board of
directors, any or all series of preferred stock could have preferences over the
common stock with respect to dividends and other distributions and upon
liquidation or could have voting or conversion rights that could adversely
affect the holders of the outstanding common stock.
 
   
     In addition, the preferred stock could delay, defer or prevent a change of
control of our company. We have no present plans to issue shares of preferred
stock. Prior to the completion of this offering, however, our
    
 
                                       74

<PAGE>   76
 
   
board of directors will adopt a rights plan. See "-- Rights Plan".
    
 
                      LIMITATION ON DIRECTORS' LIABILITIES
 
   
     Our certificate of incorporation will limit the liability of our directors
to us and our stockholders to the fullest extent permitted by Delaware law.
Specifically, our directors will not be personally liable for money damages for
breach of fiduciary duty as a director, except for liability:
    
 
- for any breach of the director's duty of loyalty to us or our stockholders;
 
- for acts or omissions not in good faith or which involve intentional
  misconduct or a knowing violation of law;
 
- under Section 174 of the Delaware General Corporation Law, which concerns
  unlawful payments of dividends, stock purchases or redemptions; and
 
- for any transaction from which the director derived an improper personal
  benefit.
 
    ANTI-TAKEOVER EFFECTS OF OUR CERTIFICATE OF INCORPORATION AND BYLAWS AND
                           PROVISIONS OF DELAWARE LAW
 
     Our certificate of incorporation, our bylaws and Section 203 of the
Delaware General Corporation Law will contain provisions summarized below that
may delay, discourage or prevent the acquisition or control of our company by
means of a tender offer, open market purchase, proxy fight or otherwise,
including acquisitions that might result in a premium being paid over the market
price of the common stock.
 
STOCKHOLDER ACTION BY WRITTEN CONSENT UNTIL THE SPIN-OFF; SPECIAL MEETINGS
 
     Our certificate of incorporation and bylaws will permit stockholder action
by written consent until the time that Cabot and its affiliates cease to
beneficially own an aggregate of at least a majority of our then outstanding
shares of common stock. Thereafter, any action required or permitted to be taken
by our stockholders may be effected only at a duly called annual or special
meeting of stockholders and may not be effected by a written consent in lieu of
a meeting of stockholders. Prior to Cabot and its affiliates ceasing to
beneficially own an aggregate of at least a majority of our then outstanding
shares of common stock, we will call a special meeting of stockholders promptly
upon the request of Cabot. After Cabot and its affiliates cease to beneficially
own an aggregate of at least a majority of our then outstanding shares of common
stock, except as otherwise required by law and subject to the rights of the
holders of any preferred stock, special meetings of stockholders for any purpose
may be called only by our board of directors, its chairman or, at the written
request of a majority of our board of directors, our president, and the power of
stockholders to call a special meeting will be specifically denied.
 
ADVANCE NOTICE PROCEDURES
 
     Our bylaws will require advance notice of the nomination, other than by or
at the direction of our board of directors, of candidates for election as
directors, as well as for other stockholder proposals, to be considered at
annual meetings of stockholders. Subject to some exceptions, notice of intent to
nominate a director or raise matters at these meetings will have to be received
in writing by us not less than 90 nor more than 120 days prior to the
anniversary of the previous year's annual meeting of stockholders, and must
contain specific information concerning the person to be nominated or the
matters to be brought before the meeting and concerning the stockholder
submitting the proposal. If the chairman of a meeting determines that an
individual was not nominated, or other business was not brought before the
meeting, in accordance with the advance notice procedures, that individual will
not be eligible for election as a director, or that business will not be
conducted at such meeting, as the case may be.
 
BOARD OF DIRECTORS
 
     Our certificate of incorporation and bylaws will provide that the number of
directors shall be determined from time to time by a resolution adopted by the
majority of our directors. Our certificate of incorporation and
 
                                       75

<PAGE>   77
 
bylaws will also provide that the board of directors shall be divided into three
classes, as nearly equal in number as possible. Each director will hold office
until that person's successor is duly elected and qualified. Vacancies on the
board of directors shall be filled by a majority of the remaining directors, or
by a sole remaining director, or by our stockholders if the vacancy was caused
by the action of our stockholders.
 
   
     Subject to the rights of the holders of any series of preferred stock or
any other series or class of stock to elect additional directors under specified
circumstances, prior to the date when Cabot and its affiliates cease to
beneficially own an aggregate of at least a majority of our then outstanding
shares of common stock, any director may be removed from office, with or without
cause, by the affirmative vote of the holders of at least a majority of the
outstanding common stock, voting together as a single class. On and after the
date when Cabot and its affiliates cease to beneficially own an aggregate of at
least a majority of our then outstanding shares of common stock, any director
may be removed from office only for cause upon the affirmative vote of holders
of at least 80% of our outstanding common stock, voting as a single class. A
director may not be removed by the stockholders at a meeting unless the notice
of the meeting states that the purpose, or one of the purposes, of the meeting
is removal of the director.
    
 
     The provisions of our certificate of incorporation and bylaws described
above would preclude a third party from removing incumbent directors and
simultaneously gaining control of our board of directors by filling the
vacancies created by removal with its own nominees. Under the classified board
provisions described above, it would take at least two elections of directors
for any individual or group to gain control of our board of directors.
 
ADOPTION, AMENDMENT OR REPEAL OF CERTIFICATE OR BYLAWS
 
     Our certificate of incorporation will provide that the affirmative vote of
holders of at least 80% of our outstanding common stock is required to amend,
repeal or adopt any provision of our certificate of incorporation inconsistent
with the provisions of that certificate regarding amendments to our bylaws,
stockholder action by written consent, special meetings of stockholders, our
board of directors and the election and removal of directors. Our certificate of
incorporation will further provide that our bylaws may be altered, amended or
repealed only by our board of directors or upon the affirmative vote of holders
of at least 80% of our outstanding common stock, voting together as a single
class.
 
SECTION 203 OF THE DELAWARE GENERAL CORPORATION LAW
 
     We must comply with the provisions of Section 203 of the Delaware General
Corporation Law. In general, Section 203 prohibits a publicly held Delaware
corporation from engaging in a "business combination" with an "interested
stockholder" for a period of three years after the date of the transaction in
which the person became an interested stockholder, unless the business
combination is approved in a prescribed manner.
 
     A "business combination" includes a merger, asset sale or other transaction
resulting in a financial benefit to the interested stockholder. An "interested
stockholder" is a person who, together with affiliates and associates, owns, or,
in some cases, within three years prior, did own, 15% or more of the
corporation's voting stock. Under Section 203, a business combination between
our company and an interested stockholder is prohibited unless it satisfies one
of the following three conditions:
 
- our board of directors must have previously approved either the business
  combination or the transaction that resulted in the stockholder becoming an
  interested stockholder;
 
- upon completion of the transaction that resulted in the stockholder becoming
  an interested stockholder, the interested stockholder owned at least 85% of
  our voting stock outstanding at the time the transaction commenced, excluding,
  for purposes of determining the number of shares outstanding, shares owned by
  (1) persons who are directors and also officers and
 
                                       76

<PAGE>   78
 
  (2) employee stock plans, in some instances; and
 
- the business combination is approved by our board of directors and authorized
  at an annual or special meeting of the stockholders by the affirmative vote of
  the holders of at least 66 2/3% of the outstanding voting stock that is not
  owned by the interested stockholder.
 
                            CORPORATE OPPORTUNITIES
 
     Our certificate of incorporation will provide that we and Cabot and our and
their respective subsidiaries may engage in the same or similar business
activities and lines of business and have an interest in the same areas of
corporate opportunities and that we and Cabot will continue to have contractual
and business relations with each other (including service of directors and
officers of Cabot as our directors and officers).
 
     Our certificate of incorporation will provide that, except as Cabot may
otherwise agree in writing, Cabot will have the right to:
 
- engage in the same or similar business activities or lines of business as us;
 
- do business with any of our potential or actual customers or suppliers; and
 
- employ or otherwise engage, or solicit for such purpose, any of our officers,
  directors or employees.
 
Neither Cabot nor any officer, employee or director of Cabot will be liable to
us or our stockholders for breach of any fiduciary or other duty by reason of
these activities.
 
     If Cabot acquires knowledge of a potential transaction or matter that may
be a corporate opportunity for both Cabot and us, Cabot will have no duty to
communicate that opportunity to us and will not be liable to us or our
stockholders because Cabot pursues or acquires that corporate opportunity for
itself, directs that corporate opportunity to another person or entity or does
not present that corporate opportunity to us.
 
   
     If one of our directors, officers or employees who is also a director,
officer or employee of Cabot acquires knowledge of a potential transaction or
matter that may be a corporate opportunity for both us and Cabot, our
certificate will require that our director, officer or employee act in good
faith in accordance with the following policy:
    
 
- a corporate opportunity offered to any person who is one of our directors but
  not one of our officers or employees and who is also an officer or employee
  (whether or not a director) of Cabot will belong to Cabot, unless the
  opportunity is expressly offered to that person solely in his or her capacity
  as our director, in which case the opportunity will belong to us;
 
- a corporate opportunity offered to any person who is one of our officers or
  employees whether or not a director and who is also a director but not an
  officer or employee of Cabot will belong to us, unless the opportunity is
  expressly offered to that person solely in his or her capacity as a director
  of Cabot, in which case the opportunity will belong to Cabot; and
 
- a corporate opportunity offered to any other person who is (1) either one of
  our officers or employees and either an officer or employee of Cabot or (2) a
  director of both us and Cabot will belong to Cabot, unless such opportunity is
  expressly offered to the person solely in his or her capacity as one of our
  officers, directors or employees, in which case the opportunity will belong to
  us.
 
     For purposes of these corporate opportunity provisions, any of our
directors who is chairman or vice chairman of our board of directors or a
committee thereof will not be deemed to be one of our officers by reason of
holding the position, unless the person is one of our full-time employees. If a
corporate opportunity is offered to us or Cabot other than through a person who
is an officer, director or employee of both us and Cabot, either we or Cabot can
pursue that opportunity.
 
     Under our certificate of incorporation, any corporate opportunity that
belongs to Cabot or to us pursuant to the policy described above will not be
pursued by the other or directed by the other to another person or
 
                                       77

<PAGE>   79
 
entity unless and until Cabot or we, as the case may be, determine not to pursue
the opportunity. If the party to whom the corporate opportunity belongs does
not, however, within a reasonable period of time, begin to pursue, or thereafter
continue to pursue, such opportunity diligently and in good faith, the other
party may pursue such opportunity or direct it to another person or entity.
 
     Our directors, officers or employees acting in accordance with the policy
described above:
 
- will be deemed fully to have satisfied their fiduciary or other duties to us
  and our stockholders with respect to that corporate opportunity;
 
- will not be liable to us or our stockholders for any breach of fiduciary duty
  by reason of the fact that Cabot pursues or acquires that opportunity for
  itself or directs that corporate opportunity to another person or do not
  communicate information regarding such opportunity to us;
 
- will be deemed to have acted in good faith and in a manner they reasonably
  believe to be in our best interests; and
 
- will be deemed not to have breached any duty of loyalty or other duty those
  persons may have to us or our stockholders and not to have derived an improper
  benefit from these actions.
 
   
     The corporate opportunity provisions in our certificate of incorporation
will expire on the date that Cabot ceases to beneficially own common stock
representing at least 20% of the combined voting power of outstanding shares of
our common stock.
    
 
     Our certificate of incorporation will provide that any person purchasing or
otherwise acquiring any interest in any shares of our capital stock shall be
deemed to have notice of and to have consented to these provisions.
 
                          TRANSFER AGENT AND REGISTRAR
 
     The transfer agent and registrar for our common stock is Boston EquiServe,
L.P.
 
                                  RIGHTS PLAN
 
   
     Prior to the completion of this offering, our board of directors intends to
adopt a rights plan. Our rights plan is designed to make it more costly and thus
more difficult to gain control of us without the consent of our board of
directors. Under the rights plan:
    
 
- our board of directors will declare a dividend of one preferred share purchase
  right, or a right, for each outstanding share of our common stock; and
 
   
- each right will entitle the registered holder to purchase from us one
  one-thousandth of a share of a new Series A Junior Participating Preferred
  Stock, par value $.001 per share, at a price of $96 per one thousandth of a
  share, with adjustment.
    
 
     The description and terms of the rights are described in a rights agreement
between us and the designated rights agent. The description presented below is
intended as a summary only and is qualified in its entirety by reference to the
rights agreement, a form of which has been filed as an exhibit to the
registration statement of which this prospectus forms a part. See "Where You Can
Find More Information".
 
   
     The rights will be attached to all certificates representing outstanding
shares of our common stock, and no separate right certificates will be
distributed. The rights will separate from the shares of our common stock on the
close of business on the tenth day after the earlier to occur of:
    
 
- a public announcement that, without the prior consent of our board of
  directors, a person or group, known as an acquiring person, including any
  affiliates or associates of that person or group, acquired beneficial
  ownership of securities having 15% or more of the voting power of all our
  outstanding common stock. Cabot, its subsidiaries, employee benefit plans
  established by or for the benefit of employees of Cabot or its subsidiaries,
  and members of the Godfrey L. Cabot family and various trusts, estates,
  corporations and other entities established for the benefit of or directly or
  indirectly owned by the members of the Godfrey L. Cabot family, are not
  included in
 
                                       78

<PAGE>   80
 
  the definition of acquiring person except in cases where Cabot family members
  or these trusts, estates, corporations and other entities are acting with
  certain third parties; and
 
- the date of the commencement of, or announcement of an intention to commence,
  a tender offer or exchange offer that would result in any person or group
  becoming an acquiring person.
 
     We refer to the date on which the rights separate from our common stock as
the distribution date. The first date of public announcement that a person or
group has become an acquiring person is the stock acquisition date.
 
     Until the distribution date, rights will be transferred only with the
shares of our common stock. In addition, until the distribution date, or earlier
redemption or expiration, of the rights:
 
- new common stock certificates issued upon transfer or new issuance of shares
  of common stock will contain a notation incorporating the rights agreement by
  reference; and
 
- the surrender for transfer of any certificates for shares of common stock
  outstanding, even without a notation, will also constitute the transfer of the
  rights associated with the shares of common stock represented by the
  certificate.
 
     As soon as practicable following the distribution date, separate
certificates evidencing the rights will be mailed to holders of record of the
shares of common stock as of the close of business on the distribution date, and
to each initial record holder of various shares of common stock issued after the
distribution date. The separate right certificates alone will evidence the
rights.
 
     The rights are not exercisable until the distribution date and will expire
at 5:00 P.M., New York time, on the tenth anniversary of the date of issuance,
unless earlier redeemed by us as described below.
 
   
     If any person becomes an acquiring person, except by a permitted offer as
defined below, or in the event that more than 50% of our assets or earning power
is sold or transferred in either case with or to an acquiring person, each
holder of a right will have, under the terms of the rights agreement, a flip-in
right. A flip-in right is the right to receive upon exercise the number of
shares of common stock, or, in the discretion of our board of directors, the
number of one-thousandths of a share of preferred stock, or, in some
circumstances, our other securities, having a value immediately before the
triggering event equal to two times the exercise price. Notwithstanding the
description above, following the occurrence of the event described above, all
rights that are, or generally were, beneficially owned by any acquiring person
or any affiliate or associate of an acquiring person will be null and void.
    
 
     A permitted offer is a tender or exchange offer for all outstanding shares
of our common stock that is at a price and on terms determined, before the
purchase of shares under the tender or exchange offer, by our board of
directors, to be adequate, taking into account all factors that our board of
directors deems relevant, and otherwise in our best interests and our
stockholders' best interest, other than the person or any affiliate or associate
on whose behalf the offer is being made.
 
   
     If, at any time following the stock acquisition date:
    
 
- we are acquired in a merger or other business combination transaction in which
  the holders of all of the outstanding shares of common stock immediately
  before the completion of the transaction are not the holders of all of the
  surviving corporation's voting power; or
 
- more than 50% of our assets or earning power is sold or transferred with or to
  an acquiring person; or
 
- if in the transaction all holders of shares of common stock are not offered
  the same consideration;
 
then each holder of a right, except rights which previously have been voided as
described above, shall afterwards have the right, known as a flip-over right, to
receive, upon exercise, shares of common stock of the
 
                                       79

<PAGE>   81
 
acquiring company having a value equal to two times the exercise price. The
holder of a right will continue to have the flip-over right whether or not the
holder exercises or surrenders the flip-in right.
 
   
     The purchase price payable, and the number of thousandths of a share of
preferred stock or other securities issuable, upon exercise of the rights may be
adjusted from time to time to prevent dilution in the event of any one of the
following:
    
 
- a stock dividend on, or a subdivision, combination or reclassification of, the
  preferred stock;
 
- the grant to holders of the shares of preferred stock of various rights or
  warrants to subscribe for or purchase shares of preferred stock at a price, or
  securities convertible into shares of preferred stock with a conversion price,
  less than the then current market price of the shares of preferred stock; or
 
- the distribution to holders of the shares of preferred stock of evidences of
  indebtedness or assets, excluding regular quarterly cash dividends, or of
  subscription rights or warrants, other than those referred to above.
 
   
     The purchase price may also be adjusted in the event of:
    
 
   
- a stock split of the shares of common stock;
    
 
   
- a stock dividend on the shares of common stock payable in shares of common
  stock; or
    
 
   
- subdivisions, consolidations or combinations of the shares of common stock
  occurring, in any case, before the distribution date.
    
 
   
     With some exceptions, no adjustment in the purchase price will be required
until cumulative adjustments require an adjustment of at least 1% in the
purchase price. No fractional one-thousandth of a share of preferred stock will
be issued and, instead, an adjustment in cash will be made based on the market
price of the shares of preferred stock on the last trading day before the date
of exercise.
    
 
   
     At any time before the earlier to occur of:
    
 
   
- a person becoming an acquiring person; and
    
 
   
- the expiration of the rights and various other circumstances,
    
 
we may redeem the rights in whole, but not in part, at a price of $0.01 per
right, or the redemption price, which redemption shall be effective upon the
action of our board of directors. Additionally, we may redeem the then
outstanding rights in whole, but not in part, at the redemption price in
connection with a merger or other business combination transaction or series of
transaction is which all holders of common stock are treated alike but not
involving an interested stockholder, as defined below.
 
   
     The shares of preferred stock purchasable upon exercise of the rights will
be non-redeemable. Each share of preferred stock will have a minimum
preferential quarterly dividend equal to the greater of $10.00 per share and an
amount equal to 1,000 times the aggregate amount of all cash dividends per share
and non-cash dividends and distributions per share other than dividends payable
in the form of common stock. In the event of liquidation, the holders of
preferred stock will be entitled to receive the greater of:
    
 
   
- $10.00 per share, plus the amount of accrued and unpaid dividends and
  distributions on the preferred stock, whether or not declared; and
    
 
   
- the aggregate amount per share equal to 1,000 times the aggregate amount to be
  distributed per share to holders of common stock.
    
 
   
     Each share of junior preferred stock will have 1,000 votes, voting together
with the shares of common stock. In the event of any merger, consolidation or
other transaction in which shares of common stock are exchanged, each share of
preferred stock will be entitled to receive 1,000 times the amount and type of
consideration received per share of common stock. The rights of the preferred
stock as to dividends, liquidation and voting,
    
 
                                       80

<PAGE>   82
 
and in the event of mergers and consolidations, are protected by customary
anti-dilution provisions. In the event that the amount of accrued and unpaid
dividends on the preferred shares is equivalent to at least six full quarterly
dividends, the holders of the preferred shares shall have the right, voting as a
class, to elect two directors in addition to the directors elected by the
holders of the common shares until all cumulative dividends on the preferred
shares have been paid through the last quarterly dividend payment date or until
non-cumulative dividends have been paid regularly for at least one year.
 
     Until a right is exercised, the holder will have no rights as a stockholder
with respect to the shares covered by that right, including, without limitation,
the right to vote or to receive dividends. While the distribution of the rights
was not taxable to our stockholders, stockholders may, depending upon the
circumstances, recognize taxable income should the rights become exercisable or
upon the occurrence of some subsequent events.
 
     Interested stockholder means any acquiring person or any of their
affiliates or associates, or any other person in which an acquiring person or
their affiliates or associates have in excess of 5% of the total combined
economic or voting power, or any person acting in concert or on behalf of any
acquiring person or their affiliates or associates.
 
                                       81

<PAGE>   83
 
                        SHARES ELIGIBLE FOR FUTURE SALE
 
   
     Upon the completion of this offering, 22,984,744 shares of common stock
will be outstanding, or 23,589,744 shares if the underwriters exercise their
over-allotment option in full. Of these shares, the 4,600,000 shares of common
stock, assuming the underwriters exercise their over-allotment option in full,
sold in this offering will be freely tradable without restriction or further
registration under the Securities Act, unless held by an "affiliate" of our
company as that term is defined in Rule 144 under the Securities Act. All of the
shares of common stock outstanding prior to this offering are "restricted
securities", as defined under Rule 144. These shares are restricted securities
because they were issued in private transactions not involving a public offering
and may not be sold in the absence of registration other than in accordance with
Rule 144 or Rule 701 promulgated under the Securities Act or another exemption
from registration. This prospectus may not be used in connection with any resale
of shares of common stock acquired in this offering by our affiliates.
    
 
     The shares of our common stock that will continue to be held by Cabot after
the offering constitute "restricted securities" within the meaning of Rule 144,
and will be eligible for sale by Cabot in the open market after the offering,
subject to contractual lockup provisions and the applicable requirements of Rule
144. In connection with this offering, we and Cabot have agreed that, subject to
specified exceptions, for a period of 180 days after the date of this
prospectus, we and they will not, without the prior written consent of Goldman,
Sachs & Co., dispose of or hedge any shares of our common stock or any
securities convertible into or exchangeable for our common stock.
 
   
     In general, under Rule 144 as currently in effect, if a minimum of one year
has elapsed since the later of the date of acquisition of the restricted
securities from the issuer or from an affiliate of the issuer, a person or
persons whose shares of common stock are aggregated, including persons who may
be deemed our affiliates, would be entitled to sell within any three-month
period a number of shares of common stock that does not exceed the greater of:
    
 
   
- one percent of the then-outstanding shares of common stock, which equals
  approximately 229,847 shares immediately after this offering; and
    
 
- the average weekly trading volume during the four calendar weeks preceding the
  date on which notice of the sale is filed with the SEC.
 
   
     Sales under Rule 144 are also subject to certain restrictions as to the
manner of sale, notice requirements and the availability of current public
information about us. In addition, under Rule 144(k), if a period of at least
two years has elapsed since the later of the date restricted securities were
acquired from us or the date they were acquired from one of our affiliates, a
stockholder who is not our affiliate at the time of sale and who has not been
our affiliate for at least three months prior to the sale would be entitled to
sell shares of common stock in the public market immediately without compliance
with the foregoing requirements under Rule 144. Rule 144 does not require the
same person to have held the securities for the applicable periods. The
foregoing summary of Rule 144 is not intended to be a complete description.
    
 
   
     Cabot has announced that it currently plans to complete its divestiture of
us by distributing all of the shares of our common stock which it owns to its
stockholders. See "Relationships Between Our Company and Cabot Corporation" and
"Risk Factors -- Risks Relating to Our Separation from Cabot".
    
 
     Any shares distributed by Cabot will be eligible for immediate resale in
the public market without restrictions by persons other than our affiliates. Our
affiliates would be subject to the restrictions of Rule 144 described above
other than the one-year holding period requirement.
 
   
     Immediately following this offering, none of the 18,989,744 "restricted
securities" will be available for immediate sale in the public market pursuant
to Rule 144(k). Shares of
    
 
                                       82

<PAGE>   84
 
   
common stock issued pursuant to the 2000 Equity Incentive Plan generally will be
available for sale in the open market by holders who are not our affiliates and,
subject to the volume and other applicable limitations of Rule 144, by holders
who are our affiliates, unless those shares are subject to vesting restrictions
or the contractual restrictions described above. Following this offering, we
intend to file a registration statement on Form S-8 under the Securities Act to
register 3.5 million shares of common stock reserved or to be available for
issuance pursuant to our 2000 Equity Incentive Plan. Following this offering, we
also intend to file a registration statement on Form S-8 under the Securities
Act to register 475,000 shares of common stock reserved for issuance under our
2000 Employee Stock Purchase Plan.
    
 
   
     Prior to this offering, there has been no public market for the common
stock. No information is currently available and we cannot predict the timing or
amount of future sales of shares, or the effect, if any, that future sales of
shares, or the availability of shares for future sale, will have on the market
price of the common stock prevailing from time to time. Sales of substantial
amounts of the common stock (including shares issuable upon the exercise of
stock options) in the public market after the lapse of the restrictions
described above, or the perception that such sales may occur, could materially
adversely affect the prevailing market prices for the common stock and our
ability to raise equity capital in the future. See "Risk Factors -- Risks
Relating to this Offering -- The actual or possible sale of our shares by Cabot,
which will own more than 80% of our outstanding shares, could depress or reduce
the market price of our common stock or cause our shares to trade below the
prices at which they would otherwise trade".
    
 
                              REGISTRATION RIGHTS
 
     Some holders of our common stock are entitled to registration rights, which
are described under "Relationships Between Our Company and Cabot
Corporation -- Registration Rights Agreement".
 
                                       83

<PAGE>   85
 

                                 LEGAL MATTERS
 
     Fried, Frank, Harris, Shriver & Jacobson (a partnership including
professional corporations), New York, New York will pass upon the validity of
the issuance of the shares of common stock offered hereby. The validity of the
shares being issued in this offering will be passed upon for the underwriters by
Sullivan & Cromwell, New York, New York.
 

                                    EXPERTS
 
     The financial statements as of September 30, 1998 and 1999 and for each of
the three years in the period ended September 30, 1999 included in this
prospectus have been so included in reliance on the report of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.
 
                      WHERE YOU CAN FIND MORE INFORMATION
 
   
     We have filed with the SEC a registration statement on Form S-1 with
respect to the common stock being offered by this prospectus. This prospectus
does not contain all of the information set forth in the registration statement
and the exhibits and schedules to the registration statement. For further
information with respect to us and the shares of common stock offered by this
prospectus, reference is made to the registration statement, including its
exhibits and schedules. With respect to statements contained in this prospectus
regarding the contents of any contract or any other document, reference is made
to the copy of that contract or other document filed as an exhibit to the
registration statement. You may review a copy of the registration statement,
including its exhibits and schedules, at the SEC's public reference room,
located at 450 Fifth Street, N.W., Washington, D.C. 20549, or at the SEC's
regional offices located at 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661, and Seven World Trade Center, 13th Floor, New York, New York
10048 or on the Internet at http://www.sec.gov. You may obtain a copy of this
registration statement from the SEC's public reference room upon payment of
prescribed fees. Please call the SEC at (800) SEC-0330 for further information
on the operation of the public reference room.
    
 
     As a result of this offering, we will become subject to the information and
reporting requirements of the Exchange Act and, in accordance with the Exchange
Act, we will file periodic reports, proxy statements and other information with
the SEC.
 
                                       84

<PAGE>   86
 
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
                     INDEX TO COMBINED FINANCIAL STATEMENTS
 
   

<TABLE>
<CAPTION>
                                                              PAGE(S)
                                                              -------
<S>                                                           <C>
Report of Independent Accountants...........................    F-2
Combined Balance Sheets at September 30, 1998 and 1999 and
  at December 31, 1999 (unaudited)..........................    F-3
Combined Statements of Income for the years ended September
  30, 1997, 1998 and 1999 and for the three months ended
  December 31, 1998 and 1999 (unaudited)....................    F-4
Combined Statements of Division Equity for the years ended
  September 30, 1997, 1998 and 1999 and for the three months
  ended December 31, 1999 (unaudited).......................    F-5
Combined Statements of Cash Flows for the years ended
  September 30, 1997, 1998 and 1999 and for the three months
  ended December 31, 1999 and 1998 (unaudited)..............    F-6
Notes to Combined Financial Statements......................    F-7

</TABLE>

    
 
                                       F-1

<PAGE>   87
 

                       REPORT OF INDEPENDENT ACCOUNTANTS
 
To the Board of Directors of Cabot Corporation:
 
In our opinion, the accompanying combined balance sheets and the related
combined statements of income, of changes in division equity and of cash flows
present fairly, in all material respects, the financial position of Cabot
Microelectronics Materials Division (the "Division"), a division of Cabot
Corporation, at September 30, 1998 and 1999, and the results of its operations
and its cash flows for each of the three years in the period ended September 30,
1999 in conformity with accounting principles generally accepted in the United
States. These financial statements are the responsibility of the Division's
management; our responsibility is to express an opinion on these financial
statements based on our audits. We conducted our audits of these statements in
accordance with auditing standards generally accepted in the United States,
which require that we plan and perform the audit to obtain reasonable assurance
about whether the financial statements are free of material misstatement. An
audit includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting principles
used and significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for the opinion expressed above.
 
/s/ PricewaterhouseCoopers LLP
 
Boston, Massachusetts
November 5, 1999

 
                                       F-2

<PAGE>   88
 
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
                            COMBINED BALANCE SHEETS
   
                             (AMOUNTS IN THOUSANDS)
    
 
   

<TABLE>
<CAPTION>
                                                                            DECEMBER 31,
                                                    SEPTEMBER 30,       --------------------
                                                  ------------------               PRO FORMA
                                                   1998       1999       1999        1999
                                                   ----       ----       ----      ---------
                                                                            (UNAUDITED)
<S>                                               <C>        <C>        <C>        <C>
ASSETS
Current assets:
  Cash..........................................  $    38    $    38    $   103     $   103
  Accounts receivable, less allowance for
     doubtful accounts of $50 at September 30,
     1998 and 1999 and December 31, 1999
     (unaudited)................................    9,057     19,888     22,563      22,563
  Inventories...................................    5,913      5,269      8,617       8,617
  Prepaid expenses and other current assets.....      142        285        772         772
  Deferred income taxes.........................      431        640        640         640
                                                  -------    -------    -------     -------
          Total current assets..................   15,581     26,120     32,695      32,695
Property, plant and equipment, net..............   24,713     40,031     46,400      42,600
Goodwill, net...................................    1,890      1,610      1,540       1,540
Other intangible assets, net....................    2,878      2,438      2,328       2,328
Deferred income taxes...........................       69         75         23          23
                                                  -------    -------    -------     -------
          Total assets..........................  $45,131    $70,274    $82,986     $79,186
                                                  =======    =======    =======     =======
LIABILITIES AND DIVISION EQUITY
Current liabilities:
  Accounts payable..............................  $   914    $   995      1,220       1,220
  Accrued expenses and other current
     liabilities................................    3,956      6,780      6,182       6,182
  Distribution payable..........................       --         --         --      69,000
                                                  -------    -------    -------     -------
          Total current liabilities.............    4,870      7,775      7,402      76,402
Deferred compensation...........................      233        422        528         528
                                                  -------    -------    -------     -------
          Total liabilities.....................    5,103      8,197      7,930      76,930
Commitments and contingencies (Note 14)
Division equity.................................   40,028     62,077     75,056       2,256
                                                  -------    -------    -------     -------
          Total liabilities and division
            equity..............................  $45,131    $70,274    $82,986     $79,186
                                                  =======    =======    =======     =======
</TABLE>

    
 
    The accompanying notes are an integral part of these combined financial
                                  statements.
                                       F-3

<PAGE>   89
 
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
                         COMBINED STATEMENTS OF INCOME
   
                 (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE DATA)
    
 
   

<TABLE>
<CAPTION>
                                                                               THREE MONTHS
                                                                                   ENDED
                                                YEAR ENDED SEPTEMBER 30,       DECEMBER 31,
                                               ---------------------------   -----------------
                                                1997      1998      1999      1998      1999
                                                ----      ----      ----      ----      ----
                                                                                (UNAUDITED)
<S>                                            <C>       <C>       <C>       <C>       <C>
Revenue......................................  $33,851   $56,862   $95,701   $20,325   $34,230
Revenue -- related party.....................    1,360     1,969     2,989       550       816
                                               -------   -------   -------   -------   -------
                                                35,211    58,831    98,690    20,875    35,046
                                               -------   -------   -------   -------   -------
Cost of goods sold...........................   18,561    27,686    44,902     9,486    15,372
Cost of goods sold -- related party..........    1,360     1,969     2,989       550       816
                                               -------   -------   -------   -------   -------
                                                19,921    29,655    47,891    10,036    16,188
                                               -------   -------   -------   -------   -------
          Gross profit.......................   15,290    29,176    50,799    10,839    18,858
Operating expenses:
  Research and development...................    8,411    10,139    14,551     3,445     4,484
  Selling and marketing......................    1,028     3,293     4,572       954     1,250
  General and administrative.................    4,468     8,576    11,880     2,570     3,896
  Amortization of goodwill and other
     intangibles.............................      720       720       720       180       180
                                               -------   -------   -------   -------   -------
          Total operating expenses...........   14,627    22,728    31,723     7,149     9,810
                                               -------   -------   -------   -------   -------
Income before income taxes...................      663     6,448    19,076     3,690     9,048
Provision for (benefit from) income taxes....      (45)    2,211     6,796     1,313     3,300
                                               -------   -------   -------   -------   -------
          Net income.........................  $   708   $ 4,237   $12,280   $ 2,377   $ 5,748
                                               =======   =======   =======   =======   =======
Unaudited pro forma net income per share.....                      $  0.58             $  0.26
                                                                   =======             =======
Unaudited pro forma shares outstanding.......                       21,126              22,224
                                                                   -------             -------
                                                                   -------             -------
</TABLE>

    
 
    The accompanying notes are an integral part of these combined financial
                                  statements.
                                       F-4

<PAGE>   90
 
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
               COMBINED STATEMENTS OF CHANGES IN DIVISION EQUITY
   
                             (AMOUNTS IN THOUSANDS)
    
 
   

<TABLE>
<CAPTION>
                                                                        ACCUMULATED
                                                                           OTHER                                       TOTAL
                                                 PARENT     RETAINED   COMPREHENSIVE   COMPREHENSIVE     DEFERRED     DIVISION
                                               INVESTMENT   EARNINGS      INCOME          INCOME       COMPENSATION    EQUITY
                                               ----------   --------   -------------   -------------   ------------   --------
<S>                                            <C>          <C>        <C>             <C>             <C>            <C>
Balance at September 30, 1996................   $27,147     $  (511)      $   25                         $  (452)     $26,209
Capital contribution from Cabot
  Corporation................................     1,214                                                                 1,214
Issuance of Cabot restricted stock under
  employee compensation plans................       451                                                     (451)          --
Amortization of deferred compensation........                                                                242          242
Net income...................................                   708                       $   708
Foreign currency translation adjustment......                                 51               51
                                                                                          -------
Total comprehensive income...................                                             $   759                         759
                                                -------     -------       ------          =======        -------      -------
Balance at September 30, 1997................    28,812         197           76                            (661)      28,424
Capital contribution from Cabot
  Corporation................................     6,822                                                                 6,822
Issuance of Cabot restricted stock under
  employee compensation plans................       878                                                     (878)          --
Amortization of deferred compensation........                                                                449          449
Net income...................................                 4,237                       $ 4,237
Foreign currency translation adjustment......                                 96               96
                                                                                          -------
Total comprehensive income...................                                             $ 4,333                       4,333
                                                -------     -------       ------          =======        -------      -------
Balance at September 30, 1998................    36,512       4,434          172                          (1,090)      40,028
Capital contribution from Cabot
  Corporation................................     8,067                                                                 8,067
Issuance of Cabot restricted stock under
  employee compensation plans................     2,050                                                   (2,050)          --
Amortization of deferred compensation........                                                                900          900
Net income...................................                12,280                       $12,280
Foreign currency translation adjustment......                                802              802
                                                                                          -------
Total comprehensive income...................                                             $13,082                      13,082
                                                -------     -------       ------          =======        -------      -------
Balance at September 30, 1999................    46,629      16,714          974                          (2,240)      62,077
Capital contribution from Cabot Corporation
  (unaudited)................................     6,922                                                                 6,922
Issuance of Cabot restricted stock under
  employee compensation plans (unaudited)....        57                                                      (57)          --
Amortization of deferred compensation
  (unaudited)................................                                                                275          275
Net income (unaudited).......................                 5,748                       $ 5,748
Foreign currency translation adjustment
  (unaudited)................................                                 34               34
                                                                                          -------
Total comprehensive income (unaudited).......                                             $ 5,782                       5,782
                                                -------     -------       ------          =======        -------      -------
Balance at December 31, 1999 (unaudited).....   $53,608     $22,462       $1,008                         $(2,022)     $75,056
                                                =======     =======       ======                         =======      =======
</TABLE>

    
 
    The accompanying notes are an integral part of these combined financial
                                  statements.
                                       F-5

<PAGE>   91
 
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
                       COMBINED STATEMENTS OF CASH FLOWS
   
                             (AMOUNTS IN THOUSANDS)
    
 
   

<TABLE>
<CAPTION>
                                                                           THREE MONTHS
                                                                               ENDED
                                            YEAR ENDED SEPTEMBER 30,       DECEMBER 31,
                                          ----------------------------   -----------------
                                           1997      1998       1999      1998      1999
                                           ----      ----       ----      ----      ----
                                                                            (UNAUDITED)
<S>                                       <C>       <C>       <C>        <C>       <C>
Cash flows from operating activities:
  Net income............................  $   708   $ 4,237   $ 12,280   $ 2,377   $ 5,748
  Adjustments to reconcile net income to
     net cash provided by operating
     activities:
     Depreciation and amortization......    1,911     2,208      2,777       585       932
     Noncash compensation expense.......      242       449        900       225       275
     Provision for inventory
       writedown........................       30       140        130        --        --
     Deferred income tax expense........       91      (143)      (215)       --        52
     Loss on disposal of property, plant
       and equipment....................       --        30        141        --        (5)
     Changes in operating assets and
       liabilities:
       Accounts receivable..............   (1,829)   (3,213)   (10,616)   (1,775)   (2,547)
       Inventories......................   (1,201)   (3,246)       646       899    (3,353)
       Prepaid expenses and other
          current assets................       (1)     (139)      (143)       40      (482)
       Accounts payable.................      165       290         74       383       219
       Accrued expenses and other
          current liabilities...........      166     1,600      2,787      (700)     (596)
       Deferred compensation............       79       114        189        47       106
                                          -------   -------   --------   -------   -------
Net cash provided by operating
  activities............................      361     2,327      8,950     2,081       349
                                          -------   -------   --------   -------   -------
Cash flows from investing activities:
  Additions to property, plant and
     equipment..........................   (1,692)   (9,313)   (17,194)   (6,810)   (7,196)
  Proceeds from sale of property, plant
     and equipment......................       --         3         65        --         6
                                          -------   -------   --------   -------   -------
Net cash used by investing activities...   (1,692)   (9,310)   (17,129)   (6,810)   (7,190)
                                          -------   -------   --------   -------   -------
Net capital contributed by Cabot
  Corporation...........................    1,214     6,822      8,067     4,806     6,922
                                          -------   -------   --------   -------   -------
Effect of exchange rate changes
  on cash...............................      107       194        112       (44)      (16)
                                          -------   -------   --------   -------   -------
Increase (decrease) in cash.............      (10)       33         --        33        65
Cash at beginning of period.............       15         5         38         5        38
                                          -------   -------   --------   -------   -------
Cash at end of period...................  $     5   $    38   $     38   $    38   $   103
                                          =======   =======   ========   =======   =======
</TABLE>

    
 
    The accompanying notes are an integral part of these combined financial
                                  statements.
                                       F-6

<PAGE>   92
 
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
                     NOTES TO COMBINED FINANCIAL STATEMENTS
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
1.  DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION:
 
   
     Cabot Microelectronics Materials Division (the "Division") is a division of
Cabot Corporation ("Cabot"). The Division is a leading supplier of Chemical
Mechanical Planarization ("CMP") slurries to the semiconductor industry
worldwide. The accompanying financial statements are derived from the historical
books and records of Cabot and present the assets and liabilities, results of
operations and cash flows applicable to the Division. The financial statements
of the Division have been prepared for inclusion in a registration statement
relating to the public offering of a portion of the common stock of Cabot
Microelectronics Corporation ("CMC"), a wholly-owned subsidiary of Cabot which
was incorporated in October 1999. Prior to the planned initial public offering,
substantially all of the assets and liabilities of the Division will be
transferred to CMC.
    
 
     The combined financial statements include the accounts of each subsidiary
or part of each subsidiary which forms Cabot's Microelectronics Materials
Division. Intercompany transactions between entities within the Division have
been eliminated.
 
   
     The combined balance sheets have been prepared using the historical basis
of accounting and include all of the assets and liabilities specifically
identifiable to the Division. The combined statements of income include all
revenue and costs attributable to the Division, including a corporate allocation
of employee benefits and costs of shared services (including legal, finance,
human resources, information systems, corporate office, and safety, health and
environmental expenses). These costs are allocated to the Division based on
criteria that management believes to be equitable, such as the Division's
revenue headcount, or actual utilization in proportion to Cabot's revenue,
headcount, or actual utilization. Management believes this provides a reasonable
estimate of the costs attributable to the Division. For the years ended
September 30, 1997, 1998 and 1999, such allocated costs amounted to $2,358,
$3,917, and $5,716, respectively, and are included in operating expenses. For
the three months ended December 31, 1998 and 1999, such allocated costs amounted
to $1,401 and $1,487, respectively. Allocated costs may not necessarily be
indicative of the costs that would have been incurred by the Division on a
standalone basis.
    
 
   
     Unaudited Interim Financial Statements -- The accompanying financial
information as of December 31, 1999 and for the three month periods ended
December 31, 1998 and 1999 is unaudited. The unaudited interim financial
information has been prepared on the same basis as the accompanying annual
financial statements. In the opinion of management, such interim financial
information reflects adjustments consisting of normal and recurring adjustments
necessary for a fair presentation of such financial information. The unaudited
results of operations for the interim periods ended December 31, 1998 and 1999
are not necessarily indicative of the results of operations to be expected for
any other interim period or for the full year.
    
 
   
     Unaudited Pro Forma Balance Sheet -- The Division intends to distribute to
Cabot, in the form of two dividends, $17,000 expected to be borrowed under a
term loan facility (Note 16) and an amount equal to the lesser of Cabot's tax
basis in the Division upon the initial public offering (after the payment of the
$17,000 dividend) or the net proceeds of the offering. The unaudited pro forma
combined balance sheet has been prepared assuming an estimated $69,000
distribution was payable at December 31, 1999, Cabot's estimated tax basis in
the Division as of that date. In addition, certain assets amounting to
approximately $3,800, which have historically been part of the Division, will
not be transferred to CMC as discussed in Note 3 -- Arrangements
    
                                       F-7

<PAGE>   93
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
   
with Cabot, Facilities Lease Arrangements. The Division is expected lease $2,980
of these assets from Cabot after the initial public offering. The removal of
these assets is reflected in the pro forma balance sheet.
    
 
   
2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
    
 
  CASH
 
     Cash management for the Division was provided by Cabot and net cash
provided by Cabot was recorded as contributions of capital to the Division.
 
  INVENTORIES
 
   
     Inventories are stated at the lower of cost, determined on the first-in,
first-out (FIFO) basis, or market. Finished goods and work in process
inventories include material, labor and manufacturing overhead costs.
    
 
  PROPERTY, PLANT AND EQUIPMENT
 
     Property, plant and equipment are recorded at cost. Depreciation is based
on the following estimated useful lives of the assets using the straight-line
method:
 

<TABLE>
<S>                                                           <C>
Buildings...................................................  20-25 years
Machinery and equipment.....................................   5-10 years
Furniture and fixtures......................................   5-10 years
Information systems.........................................    3-5 years
</TABLE>

 
     Expenditures for repairs and maintenance are charged to expense as
incurred. Expenditures for major renewals and betterments are capitalized and
depreciated over the remaining useful lives. As assets are retired or sold, the
related cost and accumulated depreciation are removed from the accounts and any
resulting gain or loss is included in the results of operations.
 
  GOODWILL AND OTHER INTANGIBLE ASSETS
 
     Goodwill and other intangible assets were acquired in connection with a
July 1995 purchase of selected assets (see Note 4). Other intangible assets
consist of trade secrets and know-how, distribution rights, customer lists and
workforce in place. Goodwill and other intangible assets are amortized on the
straight-line basis over their estimated useful lives.
 
  IMPAIRMENT OF LONG-LIVED ASSETS
 
     The Division reviews long-lived assets, including goodwill, for impairment
whenever events or changes in business circumstances indicate that the carrying
amount of the assets may not be fully recoverable or that the useful lives of
these assets are no longer appropriate. Each impairment test is based on a
comparison of the undiscounted cash flows to the recorded value of the asset. If
an impairment is indicated, the asset is written down to its estimated fair
value on a discounted cash flow basis.
 
  FOREIGN CURRENCY TRANSLATION
 
   
     The Division's operations in Europe and Asia operate primarily using the
local currency. Accordingly, all assets and liabilities of these operations are
translated using exchange rates in effect at the end of the period, and revenue
and costs are translated using weighted average exchange rates for the period.
The related translation adjustments are reported in Comprehen-
    
 
                                       F-8

<PAGE>   94
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
sive Income in division equity. Gains and losses resulting from foreign currency
transactions are immaterial for all periods presented.
 
  FOREIGN EXCHANGE MANAGEMENT
 
     The Division has used forward exchange contracts solely to hedge firm
commitments denominated in Japanese Yen associated with the construction of its
Japan plant. The terms of the currency instrument used to hedge this exposure
were consistent with the timing of the committed hedged transaction. The gains
and losses on the forward exchange contracts that were designated as hedges of
the firm commitment associated with the construction of its Japan plant were
deferred and capitalized as part of the cost of the plant. During fiscal 1998,
the Division had a $699 loss on these forward exchange contracts. Cash flows
from these forward exchange contracts have been included in additions to
property, plant and equipment in the combined statement of cash flows. The
purpose of the Division's foreign currency management activity is to protect the
Division from the risk that eventual cash flow requirements from significant
foreign currency commitments may be adversely affected by changes in exchange
rates. The Division has not entered into any other derivative transactions. The
Division had no forward exchange contracts during 1997 or 1999. The Division
does not use derivative financial instruments for trading or speculative
purposes.
 
   
  FAIR VALUES OF FINANCIAL INSTRUMENTS
    
 
     The recorded amounts of cash, accounts receivable, accounts payable, and
notes receivable for restricted stock approximate their fair values.
 
  CONCENTRATION OF CREDIT RISK
 
     Financial instruments that subject the Division to concentrations of credit
risk consist principally of accounts receivable. The Division performs ongoing
credit evaluations of its customers' financial condition and generally does not
require collateral to secure accounts receivable. The Division's exposure to
credit risk associated with nonpayment is affected principally by conditions or
occurrences within the semiconductor industry. The Division historically has not
experienced losses relating to accounts receivables from individual customers or
groups of customers. The Division maintains an allowance for doubtful accounts
based on an assessment of the collectibility of such accounts.
 
     At September 30, 1998, one customer accounted for 40.2% of net accounts
receivable. At September 30, 1999, three customers accounted for 41.0% of net
accounts receivable.
 
     Revenue from customers who represented more than 10% of revenue were as
follows:
 

<TABLE>
<CAPTION>
                                                       FOR THE YEAR ENDED
                                                         SEPTEMBER 30,
                                                    ------------------------
                                                    1997      1998      1999
                                                    ----      ----      ----
<S>                                                 <C>       <C>       <C>
Customer A........................................  42%       38%       22%
Customer B........................................  11%       12%       10%
Customer C........................................   --        --       15%
</TABLE>

 
     Customers B and C in the above table are distributors.
 
                                       F-9

<PAGE>   95
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
  REVENUE RECOGNITION
 
     Revenue is recognized upon completion of delivery obligations, provided
acceptance and collectibility are reasonably assured. A provision for the
estimated warranty cost is recorded at the time revenue is recognized based on
the Division's historical experience.
 
   
     The Division manufactures certain dispersions which are sold to Cabot at
cost. These sales are disclosed as revenue from related party in the combined
statements of income. Cabot and the Division have entered into a dispersions
services agreement, effective upon the closing date of the planned initial
public offering, which provides for dispersions to be sold to Cabot at cost plus
a margin. Under the new agreement, Cabot will supply the Division with fumed
metal oxide raw materials for these dispersions at no cost. Accordingly, the
cost of these fumed metal oxides will not be included in revenue or cost of
goods sold (see Note 3). Had the dispersions services agreement been effective
for the years ended September 30, 1997, 1998 and 1999 and the three months ended
December 31, 1998 and 1999, pro forma unaudited revenue from related party would
have been $988, $1,360, $1,994, $367 and $574, respectively.
    
 
  COST OF GOODS SOLD
 
   
     The Division has historically purchased all of its fumed metal oxides,
critical raw materials used in the manufacturing process, from Cabot at Cabot's
budgeted standard cost. Purchases of fumed metal oxides from Cabot by the
Division totaled $8,812, $16,273, and $20,310 during fiscal 1997, 1998, and
1999, respectively. Purchases of fumed metal oxides from Cabot by the Division
totaled $4,269 and $7,374 for the three months ended December 31, 1998 and 1999,
respectively.
    
 
   
     The Division has entered into a new fumed metal oxide supply agreement with
Cabot, effective immediately prior to the closing date of the planned initial
public offering, under which it will purchase fumed metal oxides at a
contractually agreed upon price (see Note 3). Had the purchases of fumed metal
oxides that were recorded in cost of goods sold for the years ended September
30, 1997, 1998 and 1999 been at the price specified in the new supply agreement
rather than at Cabot's budgeted standard cost of manufacturing, pro forma
unaudited cost of goods sold would have been $21,235, $31,880, and $50,827,
respectively. Had the purchases of fumed metal oxides that were recorded in cost
of goods sold for the three months ended December 31, 1998 and 1999 been at the
price specified in the new supply agreement rather than at Cabot's budgeted
standard cost of manufacturing, pro forma unaudited cost of goods sold would
have been $10,738 and $16,760, respectively.
    
 
   
     Cost of sales made to Cabot is disclosed as cost of goods sold from related
party in the combined statements of income. Had the dispersions services
agreement discussed above been effective for the years ended September 30, 1997,
1998 and 1999 and the three months ended December 31, 1998 and 1999, pro forma
unaudited cost of goods sold from related party would have been $838, $1,150,
$1,645, $301 and $490, respectively.
    
 
  RESEARCH AND DEVELOPMENT
 
     Research and development costs are expensed as incurred.
 
  INCOME TAXES
 
     The Division was not a separate taxable entity for federal, state or local
income tax purposes. The Division's operations are included in the consolidated
Cabot tax returns. An
 
                                      F-10

<PAGE>   96
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
income tax provision has been calculated on a separate return basis. Prior to
the consummation of the offering, the Division intends to enter into a
tax-sharing agreement with Cabot as described in Note 3.
 
     Deferred income taxes are determined based on the estimated future tax
effects or differences between financial statement carrying amounts and the tax
bases of existing assets and liabilities. Provisions are made for the U.S.
income tax liability and additional non-U.S. taxes on the undistributed earnings
of non-U.S. subsidiaries.
 
  STOCK-BASED COMPENSATION
 
     The Division participates in Cabot's stock-based compensation plans. In
accordance with the provisions of Statement of Financial Accounting Standards
("SFAS") No. 123, "Accounting for Stock-Based Compensation" ("SFAS 123"), the
Division has elected to account for stock-based compensation plans in accordance
with Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued to
Employees" ("APB 25"), and related interpretations. The Division discloses the
summary of pro forma effects to reported net income for fiscal 1997, 1998 and
1999, as if the Division had elected to recognize compensation cost based on the
fair value of the options and restricted stock granted by Cabot to employees of
the Division as prescribed by SFAS 123.
 
  EARNINGS PER SHARE
 
   
     Unaudited pro forma net income per share has been calculated using the
18,989,744 shares that will be owned by Cabot at the completion of the planned
initial public offering (the "offering") of a portion of the common stock of CMC
and the number of shares that the Division would have been required to issue to
fund a dividend to Cabot in an amount equal to Cabot's tax basis in the Division
at each period end minus the earnings from that period at an issue price per
share equal to $14.30, which is the assumed initial public offering price of
$16.00 per share less the estimated underwriting discounts and offering
expenses.
    
 
  USE OF ESTIMATES
 
     The preparation of the combined financial statements in conformity with
generally accepted accounting principles requires management to make certain
estimates and assumptions that affect the reported amounts of assets and
liabilities and the disclosure of contingent assets and liabilities at the date
of the combined financial statements and the reported amounts of revenue and
expenses during the reported period. Actual results could differ from those
estimates.
 
  COMPREHENSIVE INCOME
 
   
     The Division implemented SFAS No. 130 "Reporting Comprehensive Income"
("SFAS 130"), effective October 1, 1998. This standard requires the Division to
report the total changes in division equity that do not result directly from
transactions with stockholders, including those which do not affect retained
earnings. Other comprehensive income recorded by the Division is solely
comprised of accumulated foreign currency translation adjustments, net of
related tax effects. The deferred tax expense associated with foreign currency
translation adjustments was $32, $58, and $492 during fiscal 1997, 1998 and
1999, respectively. The deferred tax expense associated with foreign currency
translation adjustments was $21 for the three months ended December 31, 1999.
    
 
                                      F-11

<PAGE>   97
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
  RECENT ACCOUNTING PRONOUNCEMENTS
 
     In April 1998, the American Institute of Certified Public Accountants
("AICPA") issued Statement of Position 98-1, "Accounting for the Costs of
Computer Software Developed or Obtained for Internal Use" ("SOP 98-1"). SOP 98-1
provides guidance regarding whether computer software is internal-use software,
the capitalization of costs incurred for computer software developed or obtained
for internal use and accounting for the proceeds of computer software originally
developed or obtained for internal use and then subsequently sold to the public.
The Division does not expect the impact of adopting SOP 98-1, which will be
effective for the Division in fiscal 2000, to be material to its financial
condition or results of operations.
 
     In April 1998, the AICPA issued Statement of Position 98-5, "Reporting on
the Costs of Start-Up Activities" ("SOP 98-5"). SOP 98-5 requires companies to
expense start-up and organization costs as incurred. SOP 98-5 broadly defines
start-up activities and provides examples to help entities determine costs that
are and are not within the scope of SOP 98-5. SOP 98-5 will be effective for the
Division in fiscal 2000, and its initial application is to be reported as the
cumulative effective of a change in accounting principle. The Division does not
expect the impact of adopting SOP 98-5 to be material to its financial condition
or results of operations.
 
     In June 1998, the Financial Accounting Standards Board ("FASB") issued SFAS
No. 133, "Accounting for Derivative Instruments and Hedging Activities" ("SFAS
133"). SFAS 133 establishes new standards of accounting and reporting for
derivative instruments and hedging activities. SFAS 133 requires that all
derivatives be recognized at fair value in the balance sheet, and the
corresponding gains and losses be reported either in the statement of income or
as a component of comprehensive income, depending on the type of hedging
relationship that exists. The Division does not expect the impact of SFAS 133,
which will be effective for fiscal 2001, to be significant given its limited use
of derivatives.
 
     In December 1999, the Securities and Exchange Commission ("SEC") released
Staff Accounting Bulletin No. 101 ("SAB 101"), which provides guidance on the
recognition, presentation and disclosure of revenue in financial statements
filed with the SEC. The Division is required to be in conformity with the
provisions of SAB 101 no later than October 1, 2000 and does not expect a
material change in its financial condition or results of operations as a result
of SAB 101.
 
3.  ARRANGEMENTS WITH CABOT:
 
   
     These combined financial statements have been prepared for inclusion in a
registration statement relating to the offering of a portion of the common stock
of CMC. Cabot will continue to beneficially own more than 80% of the outstanding
shares of common stock after the offering. In addition, Cabot has announced that
sometime after the offering it intends to distribute, pro rata to its
stockholders, all of the shares that it owns by means of a tax-free distribution
(subject to board of director's approval and other conditions) (the "spin-off").
    
 
     CMC's relationship with Cabot following the offering and spin-off will be
governed by the following agreements.
 
                                      F-12

<PAGE>   98
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
  FUMED METAL OXIDE SUPPLY AGREEMENT
 
     The Division has entered into a fumed metal oxide supply agreement with
Cabot which will become effective upon the closing of the offering. Cabot will
continue to be the exclusive supplier of fumed metal oxides, including fumed
silica, for currently existing slurry products. The agreement provides for a
fixed annual increase in the price of fumed silica of approximately 2% and
additional increases if Cabot's raw material costs increase. The agreement
contains provisions requiring Cabot to supply the Division with fumed silica in
specified volumes. The Division is obligated to purchase at least 90% of the
six-month volume forecast and the Division must pay damages to Cabot if the
Division purchases less than that amount. In addition, the Division is obligated
to pay all reasonable costs incurred by Cabot to provide quality control testing
at levels greater than that which Cabot provides to other customers.
 
     Under the agreement, Cabot will also supply fumed alumina on terms
generally similar to those described above. Cabot is not permitted to sell fumed
metal oxides to third parties for use in CMP applications.
 
     Under the agreement, Cabot warrants that its products will meet the
Division's agreed upon product specifications. Cabot will be obligated to
replace noncompliant products with products that meet the agreed upon
specifications. The agreement also provides that any change to product
specifications for fumed metal oxides must be by mutual agreement. Any increased
costs due to product specification changes will be paid by the Division.
 
     Historically, the Division did not provide detailed product specifications
to Cabot and the Division had the ability to return products that met
specifications. Under the Division's new agreement, the Division will provide
detailed specifications and its ability to return products may be limited.
 
     The agreement has an initial term that expires in June 2005 and may be
terminated thereafter by either party on June 30 or December 31 in any year upon
18 months prior written notice.
 
  DISPERSIONS SERVICES AGREEMENT
 
   
     The Division has entered into a dispersions services agreement with Cabot
which will become effective upon the closing of the offering. The Division will
continue to offer fumed metal oxide dispersions services to Cabot, including the
manufacturing, packaging and testing of the dispersions. Under the agreement,
Cabot shall supply the Division with the fumed metal oxide particles necessary
for the manufacture of the dispersions. The pricing of the dispersions services
will be determined on a cost-plus basis. The Division's obligation to provide
Cabot with dispersions will be limited to certain maximum volumes and Cabot will
be obligated to supply certain forecasts of their expected dispersions purchases
to the Division. Cabot agrees not to engage any third party other than Davies to
provide dispersion services unless the Division is unable to supply the
requested or agreed-upon services. The agreement has an initial term that
expires in June 2005 and may be terminated by either party on June 30 or
December 31 in any year upon 18 months prior notice.
    
 
  FACILITIES LEASE ARRANGEMENTS
 
   
     Following the separation, the Division expects to sublease from Cabot the
land, building space, equipment and fixtures located in Barry, Wales that the
Division has historically utilized.
    
                                      F-13

<PAGE>   99
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
   
These assets, with a carrying value of approximately $3,139 at September 30,
1999 and approximately $2,980 at December 31, 1999, have been included in the
Division's property, plant and equipment balance in the financial statements. As
noted below under the caption "Master Separation Agreement", these assets will
not be transferred to CMC upon the separation and have been reflected as a pro
forma adjustment in the unaudited pro forma balance sheet. The lease will expire
after ten years, subject to earlier termination under certain circumstances.
    
 
   
  MASTER SEPARATION AGREEMENT
    
 
   
     Prior to the offering, Cabot and its subsidiaries are expected to transfer
substantially all of the assets and liabilities of the Division to CMC. The
Division's property, plant and equipment located in Barry, Wales will not be
transferred to CMC as discussed above under the caption "Facilities Lease
Arrangements". In addition, assets with an approximate carrying value of $200 at
September 30, 1999 and $820 at December 31, 1999 will not be transferred upon
the separation. CMC will agree to pay the costs of the transfer of assets from
Cabot including moving expenses, transfer taxes, fees related to the assignment
of contracts and expenses related to notices to customers, suppliers or other
third parties.
    
 
   
     The Division is also expected to assume all liabilities and obligations of
Cabot relating to or arising out of the Division's business operations any time
on or before the date of the transfer of the Division's business operations to
CMC other than various excluded liabilities.
    
 
   
     Under the master separation agreement, Cabot is expected to transfer
intellectual property rights related solely to the business conducted by the
Division, including patents, copyrights, trademarks, technology and know-how and
licenses and other rights concerning third party technology and intellectual
property.
    
 
   
     CMC is expected to indemnify Cabot against any losses or actions arising
out of or in connection with the liabilities assumed by CMC as part of the
separation, including any liabilities arising out of the current litigation with
Rodel discussed elsewhere and the conduct of CMC's business and affairs after
the separation date. The Master Separation Agreement is also expected to provide
that Cabot will continue to defend the lawsuits instituted by Rodel against
Cabot until CMC notifies Cabot that they will assume defense of the lawsuits.
    
 
   
  TRADEMARK LICENSE AGREEMENT
    
 
   
     The Division is expected to enter into a trademark license agreement with
Cabot that will govern their use of various trademarks used in their core
business. Under the agreement, Cabot is expected to grant a worldwide
royalty-free license to use the trademarks in connection with the manufacture,
sale or distribution of products related to the business. Under the agreement,
the Division is expected to refrain from various actions that could interfere
with Cabot's ownership of the trademarks. The agreement will also provide that
the Division's license to use the trademarks may be terminated for various
reasons, including discontinued use of the trademarks, breach of the agreement,
or a change in control of CMC.
    
 
  MANAGEMENT SERVICES AGREEMENT
 
     Effective as of the closing date of the offering, the Division and Cabot
are expected to enter into a management service agreement pursuant to which
Cabot will provide certain administrative and corporate support services to the
Division on an interim or transitional basis. Such services
 
                                      F-14

<PAGE>   100
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
   
are expected to include human resources, accounting, treasury, tax, facilities,
legal and information services. The charges for such services are expected to
allow Cabot to recover the fully allocated costs of providing such services plus
all out-of-pocket, third party costs and expenses, but without any profit to
Cabot. The management services agreement is expected to commence on the date of
the offering and continue until the earlier of the date of the spin-off or two
years from the completion of the offering. By mutual agreement, Cabot and the
Division may provide for the continuation of some services after the spin-off.
    
 
   
  CONFIDENTIAL DISCLOSURE AND LICENSE AGREEMENT
    
 
   
     The Division is expected to enter into a confidential disclosure and
license agreement with respect to confidential and proprietary information,
intellectual property and certain other matters. Cabot is expected to grant a
fully paid, world-wide non-exclusive license to the Division for Cabot's
copyrights, patents and technology that were used by Cabot in connection with
the Division's activities prior to their separation from Cabot. The Division is
expected to grant to Cabot a fully paid, world-wide, non-exclusive license to
copyrights, patents and technologies that are among the assets transferred to
the Division under the master separation agreement and that would be infringed
by the manufacture, treatment, processing, handling, marketing, sale or use of
any products or services sold by Cabot for applications other than CMP.
    
 
   
     In addition, Cabot is expected to assign an undivided one-half interest in
various patents, copyrights and technology that relate to dispersion technology,
which are owned by Cabot and used in Cabot's dispersion business and the
Division's business. Any costs, taxes or other fees related to the assignments
and transfers of intellectual property will generally be paid by the Division.
    
 
  INITIAL PUBLIC OFFERING AND DISTRIBUTION AGREEMENT
 
   
     Prior to the offering, the Division is expected to enter into an initial
public offering and distribution agreement with Cabot which governs the
respective rights and duties of the Division and Cabot with respect to the
offering and the spin-off. This agreement is expected to be effective as of the
closing of the offering. After the offering, Cabot will continue to own a
significant portion of the common stock of CMC. As a result, Cabot will continue
to include CMC as a "subsidiary" for financial reporting, accounting and other
purposes. Accordingly, the Division has agreed to certain covenants in the
initial public offering and distribution agreement, which will be binding on CMC
as long as Cabot owns at least 50% of CMC's outstanding common stock. These
covenants include restrictions on incurring debt over a certain amount. It is
expected that the Division will not be allowed to take any action which has the
effect of limiting Cabot's ability to freely sell, pledge or otherwise dispose
of shares of CMC common stock. In addition, CMC will not be allowed to issue any
shares of common stock or any rights, warrants or options to acquire CMC common
stock, if after giving effect to such issuance, Cabot would own less than 80% of
the then outstanding shares of CMC common stock. Cabot has announced that it
plans to complete a spin-off within six to twelve months after the date of a
private letter ruling from the United States Internal Revenue Service confirming
that the spin-off is tax-free to Cabot. However, Cabot is not obligated to
complete the spin-off in this time frame or at all. The agreement is expected to
indemnify Cabot against all liabilities out of any material untrue statements or
omissions in the prospectus and registration statement related to the offering.
The Division will be responsible for paying the costs and expenses incurred in
connection with the offering.
    
                                      F-15

<PAGE>   101
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
  TAX-SHARING AGREEMENT
 
     After the offering, the Division will continue to be included in Cabot's
consolidated federal income tax group for as long as Cabot beneficially owns at
least 80% of the total voting power and value of the outstanding common stock.
The Division and Cabot are expected to enter into a tax-sharing agreement
pursuant to which the Division and Cabot will make payments between them to
achieve the same effects as if the Division were to file separate federal, state
and local income tax returns. Under the terms of the tax-sharing agreement,
Cabot will not be required to make any payment to the Division for the use of
the Division's tax attributes that arise prior to the spin-off until such time
as the Division would otherwise be able to utilize such attributes. Each member
of a consolidated group is jointly and severally liable for the federal income
tax liability of each other member of the consolidated group. Accordingly,
although the tax-sharing agreement allocates tax liabilities between the
Division and Cabot, during the period in which the Division is included in
Cabot's consolidated group, the Division could be liable in the event that any
federal tax liability is incurred, but not discharged, by any other member of
Cabot's consolidated group. The Division is also expected to indemnify Cabot in
the event that the expected spin-off is not tax free to Cabot as a result of
various actions taken by or with respect to the Division or the Division's
failure to take various actions.
 
   
  REGISTRATION RIGHTS AGREEMENT
    
 
   
     Although Cabot has announced its plans to complete a spin-off within six to
twelve months of the completion of the planned offering, there is no assurance
that the spin-off will occur within this time frame or at all. Accordingly, the
Division is expected to enter into a registration rights agreement with Cabot to
provide them with registration rights relating to the shares of CMC common stock
that it holds. These registration rights generally are expected to become
effective at such time that Cabot informs the Division that it no longer intends
to proceed with or complete the spin-off.
    
 
  EMPLOYEE MATTERS AGREEMENT
 
   
     The Division and Cabot are expected to enter into an employee matters
agreement under which the Division will, with certain exceptions, be solely
responsible for the compensation and benefits of employees of the Division. The
principal exception is expected to be retirement benefits for employees of the
Division. Cabot's tax-qualified retirement plans will retain all assets and
liabilities relating to employees of the Division on and after the offering
(subject to any distributions from the plans that are required or permitted by
the plans and applicable law). The employee matters agreement will also provide
that equity awards granted to employees of the Division under Cabot's equity
incentive plans may be converted into equity awards of CMC upon agreement
between Cabot and the Division.
    
 
   
  OPTION GRANTS TO CABOT EMPLOYEES
    
 
   
     Prior to the completion of the offering, the Division intends to adopt the
Cabot Microelectronics Corporation 2000 Equity Incentive Plan. The Division
intends to grant options under the 2000 Equity Incentive Plan to Cabot
employees.
    
 
                                      F-16

<PAGE>   102
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
4.  ACQUISITION OF SELECTED ASSETS:
 
     On July 3, 1995, the Company acquired selected assets used or created in
connection with the development and sale of polishing slurries. The acquisition
was accounted for using the purchase method of accounting. Accordingly, the
purchase price of $9,800 was allocated to the net assets acquired based on their
estimated fair values. Identifiable intangible assets, consisting primarily of
trade secrets and know-how, distribution rights, customer lists and workforce in
place, were valued at $4,300 and are being amortized on a straight-line basis
over their estimated useful lives of 7-10 years. The excess of purchase price
over the fair value of the net assets acquired (goodwill) was approximately
$2,800, and is being amortized on a straight-line basis over ten years.
Accumulated amortization of goodwill and other intangible assets as of September
30, 1998 and 1999 was $2,332 and $3,052, respectively. In addition to the
purchase price, the Division also pays a royalty fee in the amount of 2.5% of
total slurry revenue through June 30, 2002. Royalty fees are paid on a monthly
basis and are included in cost of goods sold.
 
5.  INVENTORIES:
 
     Inventories consisted of the following:
 
   

<TABLE>
<CAPTION>
                                              SEPTEMBER 30,      DECEMBER 31,
                                             ----------------    ------------
                                              1998      1999         1999
                                              ----      ----         ----
                                                                 (UNAUDITED)
<S>                                          <C>       <C>       <C>
Raw materials..............................  $3,466    $3,297       $5,065
Work in process............................      91        73           29
Finished goods.............................   2,356     1,899        3,523
                                             ------    ------       ------
          Total............................  $5,913    $5,269       $8,617
                                             ======    ======       ======
</TABLE>

    
 
6.  PROPERTY, PLANT AND EQUIPMENT:
 
     Property, plant and equipment consisted of the following:
 
   

<TABLE>
<CAPTION>
                                             SEPTEMBER 30,       DECEMBER 31,
                                           ------------------    ------------
                                            1998       1999          1999
                                            ----       ----          ----
                                                                 (UNAUDITED)
<S>                                        <C>        <C>        <C>
Land.....................................  $ 1,889    $ 4,168      $ 5,026
Buildings................................    9,539     21,448       22,196
Machinery and equipment..................   10,066     15,350       16,330
Furniture and fixtures...................      271        939        1,471
Information systems......................       53        374          324
Construction in progress.................    6,285      2,778        6,868
                                           -------    -------      -------
Total property, plant and equipment......   28,103     45,057       52,215
Less: accumulated depreciation...........   (3,390)    (5,026)      (5,815)
                                           -------    -------      -------
Net property, plant and equipment........  $24,713    $40,031      $46,400
                                           =======    =======      =======
</TABLE>

    
 
   
     Depreciation expense was $1,191, $1,488 and $2,057 during fiscal 1997, 1998
and 1999, and $405 and $752 for the three months ended December 31, 1998 and
1999, respectively.
    
 
                                      F-17

<PAGE>   103
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
7.  ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES:
 
     Accrued expenses and other current liabilities consisted of the following:
 
   

<TABLE>
<CAPTION>
                                                            SEPTEMBER 30,
                                                           ----------------
                                                            1998      1999
                                                            ----      ----
<S>                                                        <C>       <C>
Raw material accruals....................................  $1,043    $1,265
Accrued compensation.....................................   1,177     1,568
Warranty accrual.........................................     348       891
Fixed asset accruals.....................................     280       712
Other....................................................   1,108     2,344
                                                           ------    ------
          Total..........................................  $3,956    $6,780
                                                           ======    ======
</TABLE>

    
 
8.  DEFERRED COMPENSATION
 
   
     Under the Cabot Supplemental Employee Retirement Plan, certain officers and
employees of the Division elected to defer certain percentages of their
compensation to future periods. Amounts deferred as of September 30, 1998, 1999
and December 31, 1999 were $233, $422 and $528, respectively.
    
 
9.  JOINT DEVELOPMENT AGREEMENT:
 
     In September 1998, the Division entered into a three-year joint development
agreement with a customer in the semiconductor industry. Under the agreement,
the Division provides the customer with CMP slurries of up to $3,000 over a
three-year period in exchange for the use of CMP equipment provided by the
customer. The arrangement was accounted for as a nonmonetary transaction in
accordance with APB No. 29 "Accounting for Nonmonetary Transactions." The CMP
equipment was accounted for as an operating lease in accordance with SFAS No.
13, "Accounting for Leases." The cost of leasing the CMP equipment was valued
based upon the slurries that the customer is entitled to receive over the
three-year period. Total revenue and lease expense recognized under this
agreement were $776 and $1,000, respectively, for the year ended September 30,
1999. Deferred revenue of $224 was recorded as of September 30, 1999.
 
10.  PENSION PLANS AND POSTRETIREMENT BENEFITS:
 
   
     The Division participates in Cabot's noncontributory defined benefit
pension plans which cover substantially all Cabot employees. Those Cabot
employees who accept employment with CMC will terminate employment with Cabot
but will maintain their vested and unvested rights in the pension plans. Pension
benefits accrue under several benefit plans including the Cash Balance Plan
("CBP"), a defined benefit pension plan, and the Employee Stock Ownership Plan
("ESOP"). Cabot's funding policy is to contribute annual amounts based on
actuarial and economic assumptions designed to achieve adequate funding of
projected benefit obligations. The net periodic pension cost allocated to the
Division on behalf of the Division employees was $26, $96 and $61 during fiscal
1997, 1998 and 1999, respectively. In November 1988, the ESOP was funded with
Cabot's newly issued Series B Convertible Preferred Stock, which was acquired
with $75,000 borrowed by the ESOP. Benefits provided under Cabot's defined
benefit pension plans are primarily based on years of service and the employee's
compensation. ESOP costs
    
 
                                      F-18

<PAGE>   104
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
incurred on behalf of employees of the Division were $75, $90, and $99 during
fiscal 1997, 1998 and 1999, respectively.
 
     The Division participates in Cabot's defined benefit postretirement plans
that provide certain healthcare and life insurance benefits to retired
employees. Substantially all of Cabot's U.S. employees become eligible for these
benefits if they have met certain age and service requirements at retirement.
Cabot funds the plans as claims or insurance premiums are incurred.
Postretirement benefit expense is recognized as services are rendered by the
employees. Postretirement benefit costs incurred on behalf of employees of the
Division were $80, $81, and $99 during fiscal 1997, 1998 and 1999, respectively.
 
11.  SAVINGS PLAN AND OTHER INCENTIVE COMPENSATION PLANS:
 
   
     Cabot sponsors a profit sharing and savings plan called the Cabot
Retirement Incentive Savings Plan ("CRISP"). Substantially all of the Division's
domestic employees are eligible to participate in the plan under which Cabot
will make matching contributions of at least 75% of a participant's contribution
up to 7.5% of the participant's eligible compensation, subject to limitations
required by government laws or regulations. Cabot's contributions to the CRISP
on behalf of employees of the Division were $199, $258, and $385 during fiscal
1997, 1998 and 1999, respectively.
    
 
12.  EQUITY INCENTIVE PLANS AND EMPLOYEE LOANS RECEIVABLE:
 
   
     Cabot sponsors an Equity Incentive Plan for key employees under which
participants may be granted various types of stock-based awards. Awards under
the 1996 plan made as part of Cabot's Long-Term Incentive Program, which
constitutes a significant portion of the awards made under this plan, consist of
restricted stock and non-qualified stock options. Restricted stock could be
purchased at a price equal to 40% of the fair market value on the date of the
award or nonqualified stock options exercisable at the fair market value of
Cabot's common stock on the date of the award. Variations of the restricted
stock awards were made to international employees in order to try to provide
results comparable to U.S. employees. The awards generally vest on the third
anniversary of the grant for employees then employed by Cabot, and the options
generally expire five years from the date of grant. In November 1998, Cabot
Board of Directors adopted the 1999 Equity Incentive Plan. The 1999 plan was
approved by the stockholders of Cabot in March 1999. This plan is similar to the
1996 Equity Incentive Plan with the exception of the purchase price, which was
established at a price equal to 30% of the fair market value on the date of the
award. A limited number of awards are also available for no consideration under
both the 1996 plan and the 1999 plan in lieu of cash compensation.
    
 
   
     Certain Cabot employees who will become employees of the Company have been
granted nonqualified stock options and restricted stock under these plans. Stock
options have been granted at the fair market value of Cabot's common stock on
the date of grant, vest ratably over four years, and generally expire ten years
from the date of grant. Restricted stock awards generally enable an employee to
purchase restricted stock at a price equal to 30% or 40% of the fair market
value on the date of the award and such awards generally vest on the third
anniversary date of the award. Compensation expense, equal to the discount on
the restricted stock, is deferred and recorded as a charge to income over the
vesting period. Deferred compensation is recorded as a component of Division
equity.
    
 
                                      F-19

<PAGE>   105
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
   
     In May 1999, Cabot adopted a stock purchase assistance plan whereby Cabot
may extend credit to its employees to purchase restricted shares of Cabot
Corporation common stock awarded under Cabot's 1999 Equity Incentive Plan. Prior
to this date, loans were made available to employees by a third party financial
institution. On June 30, 1999, Cabot purchased, from a financial institution,
all such full recourse loans to Cabot employees outstanding as of that date. As
of September 30, 1999, notes receivable from employees of the Division totaled
approximately $1,383. These notes receivable are not included in the historical
financial statements of the Division and upon the closing of the planned initial
public offering, any restricted stock receivables related to securities held by
employees of the Division will remain with Cabot.
    
 
  RESTRICTED STOCK
 
     Shares of restricted stock awarded to employees of the Division are
summarized as follows:
 

<TABLE>
<CAPTION>
                                                                       WEIGHTED
                                                                       AVERAGE
                                                         RESTRICTED    EXERCISE
                                                           STOCK        PRICE
                                                         ----------    --------
<S>                                                      <C>           <C>
Outstanding at September 30, 1996......................    46,100       $ 9.67
  Granted..............................................    31,500        19.55
  Vested...............................................    (8,800)        6.14
  Canceled.............................................        --           --
                                                          -------
Outstanding at September 30, 1997......................    68,800        14.64
  Granted..............................................    48,200        17.09
  Vested...............................................   (10,000)       10.00
  Canceled.............................................      (300)       14.13
                                                          -------
Outstanding at September 30, 1998......................   106,700        16.19
  Granted..............................................    95,300        33.09
  Vested...............................................   (30,300)        9.62
  Canceled.............................................    (4,700)       17.70
                                                          -------
Outstanding at September 30, 1999......................   167,000       $26.98
                                                          =======
</TABLE>

 
     Total compensation expense recognized by the Division for restricted stock
based awards under APB 25 amounted to $242, $449, and $900 during fiscal 1997,
1998 and 1999, respectively.
 
                                      F-20

<PAGE>   106
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
  STOCK OPTIONS
 
     Cabot stock option activity related to employees of the Division is
summarized as follows:
 

<TABLE>
<CAPTION>
                                                                     WEIGHTED
                                                                     AVERAGE
                                                           STOCK     EXERCISE
                                                          OPTIONS     PRICE
                                                          -------    --------
<S>                                                       <C>        <C>
Balance at September 30, 1996...........................  13,072      $ 9.13
  Granted...............................................   1,300       23.88
  Exercised.............................................      --          --
  Canceled..............................................      --          --
                                                          ------
Balance at September 30, 1997...........................  14,372       10.46
  Granted...............................................  17,615       35.31
  Exercised.............................................  (4,000)       8.72
  Canceled..............................................      --          --
                                                          ------
Balance at September 30, 1998...........................  27,987       26.35
  Granted...............................................  63,000       27.00
  Exercised.............................................  (2,400)      10.47
  Canceled..............................................  (5,850)      35.31
                                                          ------
Balance at September 30, 1999...........................  82,737      $26.67
                                                          ======
</TABLE>

 
     There were no options granted at prices below the quoted market price of
common stock.
 
     Additional information about outstanding options to purchase Cabot common
stock held by employees of the Division at September 30, 1999 is as follows:
 

<TABLE>
<CAPTION>
                                         OUTSTANDING                        EXERCISABLE
                           ----------------------------------------    ---------------------
                                           WEIGHTED        WEIGHTED                 WEIGHTED
                                            AVERAGE        AVERAGE                  AVERAGE
                            NUMBER        CONTRACTUAL      EXERCISE     NUMBER      EXERCISE
RANGE OF EXERCISE PRICE    OF SHARES    LIFE (IN YEARS)     PRICE      OF SHARES     PRICE
-----------------------    ---------    ---------------    --------    ---------    --------
<S>                        <C>          <C>                <C>         <C>          <C>
$7.59-$10.47.............    6,272            .97           $ 7.75       6,272       $ 7.75
$23.88-$35.31............   76,465           2.46            28.22         400        26.70
                            ------                          ------       -----       ------
                            82,737                          $26.67       6,672       $ 8.89
                            ======                          ======       =====       ======
</TABLE>

 
     As permitted by SFAS 123, Cabot has chosen to continue to account for stock
options in accordance with the provisions of APB 25 and, accordingly, no
compensation expense related to stock option grants was recorded.
 
                                      F-21

<PAGE>   107
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
     Pro forma information regarding net income is required by SFAS 123 and has
been determined as if the Division had accounted for stock options under the
fair value method using the Black-Scholes option-pricing model and the following
assumptions:
 

<TABLE>
<CAPTION>
                                                         YEAR ENDED SEPTEMBER 30,
                                                       -----------------------------
                                                        1997       1998       1999
                                                        ----       ----       ----
<S>                                                    <C>        <C>        <C>
Expected stock price volatility......................      26%        34%        35%
Risk free interest rate..............................    6.54%      5.63%      5.42%
Expected life of options.............................  4 years    4 years    4 years
Expected annual dividends............................    $0.40      $0.44      $0.44
</TABLE>

 
     The estimated weighted average fair value of options granted by Cabot to
employees of the Division during fiscal 1997, 1998 and 1999 were $6.37, $11.00,
and $8.24, respectively. Had the fair value based method been adopted, the
Division's pro forma net income for fiscal 1997, 1998 and 1999 would have been
$707, $4,218 and $12,213, respectively.
 
13.  INCOME TAXES:
 
     Income before income taxes was as follows:
 

<TABLE>
<CAPTION>
                                                                SEPTEMBER 30,
                                                          -------------------------
                                                          1997     1998      1999
                                                          ----     ----      ----
<S>                                                       <C>     <C>       <C>
Domestic................................................  $293    $6,178    $18,655
Foreign.................................................   370       270        421
                                                          ----    ------    -------
          Total.........................................  $663    $6,448    $19,076
                                                          ====    ======    =======
</TABLE>

 
     Taxes on income consisted of the following:
 

<TABLE>
<CAPTION>
                                                                SEPTEMBER 30,
                                                          -------------------------
                                                          1997      1998      1999
                                                          ----      ----      ----
<S>                                                       <C>      <C>       <C>
U.S. federal and state:
  Current...............................................  $(156)   $1,953    $6,522
  Deferred..............................................    (17)     (182)     (234)
                                                          -----    ------    ------
Total...................................................   (173)    1,771     6,288
                                                          -----    ------    ------
Foreign:
  Current...............................................     20       401       489
  Deferred..............................................    108        39        19
                                                          -----    ------    ------
Total...................................................    128       440       508
                                                          -----    ------    ------
Total U.S. and foreign..................................  $ (45)   $2,211    $6,796
                                                          =====    ======    ======
</TABLE>

 
                                      F-22

<PAGE>   108
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
     The provision for income taxes at the Division's effective tax rate
differed from the provision for income taxes at the statutory rate as follows:
 

<TABLE>
<CAPTION>
                                                                SEPTEMBER 30,
                                                          -------------------------
                                                          1997      1998      1999
                                                          ----      ----      ----
<S>                                                       <C>      <C>       <C>
Computed tax expense at the federal statutory rate......  $ 232    $2,257    $6,677
U.S. benefits from research and development
  activities............................................   (353)     (367)     (344)
State taxes, net of federal effect......................     10        58       508
Impact of foreign taxation at different rates,
  repatriation and other................................     62       354       155
Foreign sales corporation...............................    (17)     (118)     (243)
Other, net..............................................     21        27        43
                                                          -----    ------    ------
(Benefit) provision for income taxes....................  $ (45)   $2,211    $6,796
                                                          =====    ======    ======
</TABLE>

 
   
     The Division's effective tax rate differed from the statutory tax rate
during the three months ended December 31, 1998 and 1999 primarily as a result
of tax benefits generated as a result of research and development activities.
    
 
     Significant components of deferred income taxes were as follows:
 

<TABLE>
<CAPTION>
                                                               SEPTEMBER 30,
                                                              ----------------
                                                               1998      1999
                                                               ----      ----
<S>                                                           <C>       <C>
Deferred tax assets:
  Amortization..............................................  $  281    $  367
  Employee benefits.........................................     596     1,118
  Inventory.................................................     100        89
  Product warranty..........................................     122       168
  Accrued legal fees........................................      64       105
  State and local taxes.....................................      67       144
  Other.....................................................      58       133
                                                              ------    ------
          Total deferred tax assets.........................  $1,288    $2,124
                                                              ======    ======
Deferred tax liabilities:
  Depreciation and amortization.............................  $  698    $  827
  Translation adjustment....................................      90       582
                                                              ------    ------
          Total deferred tax liabilities....................  $  788    $1,409
                                                              ======    ======
</TABLE>

 
   
14.  COMMITMENTS AND CONTINGENCIES:
    
 
  LEASE COMMITMENTS
 
     Cabot, on behalf of the Division, leases certain transportation vehicles,
warehouse facilities, office space, machinery and equipment under cancelable and
noncancelable leases, most of which expire within ten years and may be renewed
by the Division. Rent expense under such arrangements during fiscal 1997, 1998
and 1999 totaled $160, $150 and $1,439, respectively.
 
                                      F-23

<PAGE>   109
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
     Future minimum rental commitments under noncancelable leases as of
September 30, 1999 are as follows:
 

<TABLE>
<S>                                                   <C>
2000................................................  $1,327
2001................................................   1,092
2002................................................      69
2003................................................      26
2004................................................      11
2005 and thereafter.................................      --
                                                      ------
                                                      $2,525
                                                      ======
</TABLE>

 
  OTHER LONG-TERM COMMITMENTS
 
   
     The Division has a long term supply agreement with the Division's largest
customer. The agreement was designed to provide this customer with specified
quantities of polishing slurries at agreed-upon prices. This agreement expires
in January 2002.
    
 
   
     The Division has an agreement with Davies Imperial Coatings, Inc.
("Davies") pursuant to which Davies will perform certain agreed upon dispersion
services for the Division. The Division has agreed to purchase minimum amounts
of services per year and has also agreed to invest $150 per year in capital
improvements or other expenditures to maintain capacity at the Davies
dispersions facility. The initial term of this agreement expires in October
2004, with automatic one-year renewals, and contains a 90 day cancellation
clause executable by either party.
    
 
  CONTINGENCIES
 
     In June 1998, a lawsuit was commenced by Rodel, Inc. ("Rodel") against
Cabot seeking injunctive relief and damages relating to allegations that Cabot,
through the Division, is infringing on a United States patent that Rodel owns.
The action is presently in discovery and a trial is scheduled to begin in
November 2000. In April 1999, Rodel commenced a second lawsuit against Cabot
seeking injunctive relief and damages relating to allegations that Cabot is
infringing two other United States patents owned by an affiliate of Rodel. In
the first lawsuit, the only product that is specifically alleged to infringe a
Rodel patent is the Division's W2000 slurry, which is used to polish tungsten
and which currently accounts for a significant portion of the Division's
revenue. The second lawsuit does not allege infringement by any specific
products; instead, it cites one of Cabot's patents (which relates to a CMP
polishing slurry for metal surfaces including, among other things, aluminum and
copper) as evidence of infringement by Cabot through the manufacture and sale of
unspecified products. At this stage, the Division cannot predict whether or to
what extent Rodel will make specific infringement claims with respect to any of
the Division's products other than the Division's W2000 slurry in these or any
future proceedings. It is possible that Rodel will claim that many of the
Division's products infringe its patents.
 
     Although Cabot is the only named defendant in these lawsuits, the Division
has agreed to indemnify Cabot for any and all losses and expenses arising out of
this litigation as well as any other litigation arising out of the Division's
business. Cabot and the Division believe that they have meritorious defenses to
these actions and intend to vigorously defend themselves. However, it is not
possible to predict the ultimate outcome of these lawsuits. These claims, even
if they are without merit, could be expensive and time consuming to defend and
could adversely
 
                                      F-24

<PAGE>   110
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
   
affect the Division's business, financial condition and results of operations.
If Cabot or the Division were to lose these lawsuits, they may be liable for
significant damages and legal expenses and may be enjoined from manufacturing
slurry products. It is not possible to estimate the amount of a probable loss,
if any, to the Division that might result from this matter. Accordingly, no
provision has been made in the Division's combined financial statements.
    
 
15.  FINANCIAL INFORMATION BY INDUSTRY SEGMENT AND GEOGRAPHIC AREA:
 
     The Division has adopted SFAS No. 131, "Disclosure about Segments of an
Enterprise and Related Information" ("SFAS 131"), which was effective for the
fiscal year ended September 30, 1999.
 
     The Division operates predominantly in one industry segment -- the
development, manufacture, and sale of CMP slurries. Although the Division's
products can be categorized into various product lines and periodic financial
information is available by product line, management determined that the
Division's business is considered one reportable segment in accordance with the
aggregation criteria under SFAS 131.
 
     The Division does not classify export sales as foreign sales. Financial
information by geographic area was as follows:
 
   

<TABLE>
<CAPTION>
                                                                      SEPTEMBER 30,
                                                              -----------------------------
                                                               1997       1998       1999
                                                               ----       ----       ----
<S>                                                           <C>        <C>        <C>
Revenue:
  United States.............................................  $33,650    $55,600    $89,666
  Europe....................................................    1,561      3,231      4,789
  Asia......................................................        0          0      4,235
                                                              -------    -------    -------
Total.......................................................  $35,211    $58,831    $98,690
                                                              =======    =======    =======
Property, plant and equipment, net:
  United States.............................................  $14,975    $17,376    $25,324
  Europe....................................................    2,220      2,461      3,139
  Asia......................................................        0      4,876     11,568
                                                              -------    -------    -------
Total.......................................................  $17,195    $24,713    $40,031
                                                              =======    =======    =======
</TABLE>

    
 
   
16.  SUBSEQUENT EVENT:
    
 
   
     In December 1999, CMC obtained a letter of commitment from a bank for a
line of credit arrangement whereby CMC will be able to borrow an aggregate
amount of up to $25 for working capital, general corporate purposes and capital
expenditures. The term of the credit arrangement is three years. CMC will be
required to pay a fee on the $25 commitment amount until the loan agreement is
signed and will be required to pay a fee on unused portion of the commitment
amount after the loan agreement is signed. The commitment from the bank will be
subject to the consummation of the initial public offering of CMC's common stock
and certain limits for the aggregate indebtedness of CMC at the time of closing
of this credit arrangement.
    
 
   
     In March 2000, the Company obtained a letter of commitment from a bank for
an unsecured senior credit facility under which the lender would make term loans
to the Company in an aggregate amount of $17,000. The first term loan is in the
amount of $3,500 due in March 2005.
    
 
                                      F-25

<PAGE>   111
                   CABOT MICROELECTRONICS MATERIALS DIVISION
 
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
   
           (INFORMATION SUBSEQUENT TO NOVEMBER 5, 1999 IS UNAUDITED)
    
 
   
The second term loan is in the amount of $13,500 with quarterly repayments
starting on June 30, 2000 and the remaining obligation due in March 2005.
Interest on the outstanding principal balance is due quarterly in arrears. The
proceeds of the loans under this credit facility are expected to be used to
finance the expected dividend to Cabot.
    
 
17.  VALUATION AND QUALIFYING ACCOUNTS:
 
     The following table sets forth activities in the Division's allowance for
doubtful accounts:
 

<TABLE>
<CAPTION>
                                              BALANCE AT                                BALANCE AT
                                              BEGINNING     CHARGES TO                    END OF
                                               OF YEAR       EXPENSES     DEDUCTIONS       YEAR
            ACCOUNTS RECEIVABLE               ----------    ----------    ----------    ----------
<S>                                           <C>           <C>           <C>           <C>
Year ended:
  September 30, 1997........................     $ 50          $ --          $--           $ 50
  September 30, 1998........................       50            --           --             50
  September 30, 1999........................       50            --           --             50
</TABLE>

 
   
     The Division has historically not recorded warranty claims against warranty
reserves but rather provided for them in the period in which they occurred. As
such, charges to expenses represent the net charge required to maintain an
appropriate reserve.
    
 
   

<TABLE>
<S>                                           <C>           <C>           <C>           <C>
WARRANTY RESERVES
 
Year ended:
  September 30, 1997........................     $ 82          $148          $--           $230
  September 30, 1998........................      230           118           --            348
  September 30, 1999........................      348           543           --            891
</TABLE>

    
 
                                      F-26

<PAGE>   112
 

                                  UNDERWRITING
 
     Cabot Microelectronics, Cabot Corporation and the underwriters named below
have entered into an underwriting agreement with respect to the shares being
offered. Subject to certain conditions, each underwriter has severally agreed to
purchase the number of shares indicated in the following table. Goldman, Sachs &
Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated and FleetBoston
Robertson Stephens Inc. are the representatives of the underwriters.
 

<TABLE>
<CAPTION>
                        UNDERWRITERS                          NUMBER OF SHARES
                        ------------                          ----------------
<S>                                                           <C>
Goldman, Sachs & Co. .......................................
Merrill Lynch, Pierce, Fenner & Smith
             Incorporated...................................
FleetBoston Robertson Stephens Inc..........................
                                                                  --------
          Total.............................................
                                                                  ========
</TABLE>

 
                            ------------------------
 
   
     If the underwriters sell more shares than the total number set forth in the
table above, the underwriters have an option to buy up to an additional 600,000
shares from us to cover such sales. They may exercise that option for 30 days.
If any shares are purchased pursuant to this option, the underwriters will
severally purchase shares in approximately the same proportion as set forth in
the table above.
    
 
   
     The following table shows the per share and total underwriting discounts
and commissions to be paid to the underwriters by us. Such amounts are shown
assuming both no exercise and full exercise of the underwriters' option to
purchase additional shares.
    
 

<TABLE>
<CAPTION>
                                 PAID BY
                         CABOT MICROELECTRONICS
                       ---------------------------
                       NO EXERCISE   FULL EXERCISE
                       -----------   -------------
<S>                    <C>           <C>
Per Share............    $              $
Total................    $              $
</TABLE>

 
     Shares sold by the underwriters to the public will initially be offered at
the initial public offering price set forth on the cover of this prospectus. Any
shares sold by the underwriters to securities dealers may be sold at a discount
of up to $     per share from the initial public offering price. Any such
securities dealers may resell any shares purchased from the underwriters to
certain other brokers or dealers at a discount of up to $     per share from the
initial public offering price. If all the shares are not sold at the initial
public offering price, the representatives may change the offering price and the
other selling terms.
 
     We and Cabot have agreed with the underwriters not to sell or otherwise
dispose any of our common stock or securities convertible into or exchangeable
for shares of our common stock during the period from the date of this
prospectus continuing through the date 180 days after the date of this
prospectus, except with the prior written consent of the representatives. This
agreement does not apply to any existing employee benefit plans. See "Shares
Eligible for Future Sale" for a discussion of transfer restrictions.
 
   
     At our request, the underwriters have reserved for sale, at the initial
public offering price, up to 230,000 shares offered by this prospectus to be
sold to employees and friends of ours. The number of shares of common stock
available for sale to the general public will be reduced to the extent these
persons purchase the reserved shares. Any reserved shares which are not so
purchased will be offered by the Underwriters to the general public on the same
basis as the other shares of common stock offered by this prospectus.
    
 
   
     Prior to this offering, there has been no public market for the shares. The
initial public offering price will be negotiated among us and the
representatives. The factors to be considered in determining the initial public
offering price of the shares, in addition to prevailing market conditions, will
be our historical performance, estimates of the business
    
 
                                       U-1

<PAGE>   113
 
potential and earnings prospects of our company, an assessment of our management
and the consideration of the above factors in relation to market valuation of
companies in related businesses.
 
   
     We have applied to list our common stock on Nasdaq under the symbol "CCMP".
    
 
     In connection with this offering, the underwriters may purchase and sell
shares of common stock in the open market. These transactions may include short
sales, stabilizing transactions and purchases to cover positions created by
short sales. Short sales involve the sale by the underwriters of a greater
number of shares than they are required to purchase in the offering. Stabilizing
transactions consist of certain bids or purchases made for the purpose of
preventing or retarding a decline in the market price of the common stock while
the offering is in progress.
 
     The underwriters also may impose a penalty bid. This occurs when a
particular underwriter repays to the underwriters a portion of the underwriting
discount received by it because the representatives have repurchased shares sold
by or for the account of such underwriter in stabilizing or short covering
transactions.
 
     These activities by the underwriters may stabilize, maintain or otherwise
affect the market price of the common stock. As a result, the price of the
common stock may be higher than the price that otherwise might exist in the open
market. If these activities are commenced, they may be discontinued by the
underwriters at any time. These transactions may be effected on Nasdaq, in the
over-the-counter market or otherwise.
 
   
     FleetBoston Robertson Stephens Inc., an underwriter in this offering, is an
affiliate of the lending bank under our credit facility. Merrill Lynch, Pierce,
Fenner & Smith Incorporated, also an underwriter in this offering, is an
affiliate of Merrill Lynch Bank & Trust, the lending bank for the loan facility
available to all recipients of restricted stock grants.
    
 
     The underwriters do not expect sales to discretionary accounts to exceed
five percent of the total number of shares offered.
 
   
     We estimate that our share of the total expenses of the offering, excluding
underwriting discounts and commissions, will be approximately $2.3 million.
    
 
     We have agreed to indemnify the several underwriters against certain
liabilities, including liabilities under the Securities Act.
 
                                       U-2

<PAGE>   114
 
   
                               INSIDE BACK COVER
    
 
   
     [Map of our global headquarters and facilities]
    
 
   
     Strategically Positioned for Success
    

<PAGE>   115
 
-------------------------------------------------------
-------------------------------------------------------
 
  No dealer, salesperson or other person is authorized to give any information
or to represent anything not contained in this prospectus. You must not rely on
any unauthorized information or representations. This prospectus is an offer to
sell only the common units offered hereby, but only under circumstances and in
jurisdictions where it is lawful to do so. The information contained in this
prospectus is current only as of its date.
 
                               ------------------
 
 
                              TABLE OF CONTENTS
 
   

<TABLE>
<S>                                       <C>
Prospectus Summary......................    3
Risk Factors............................    7
Use of Proceeds.........................   16
Dividend Policy.........................   16
Capitalization..........................   17
Dilution................................   18
Selected Financial Data.................   19
Unaudited Pro Forma Combined Statements
  of Income.............................   21

Management's Discussion and Analysis of
  Financial Condition and Results of
  Operations............................   25
Business................................   36
Management..............................   51
Relationships Between Our Company and
  Cabot Corporation.....................   61
Security Ownership of Principal
  Stockholder and Management............   72
Description of Capital Stock............   74
Shares Eligible for Future Sale.........   82
Legal Matters...........................   84
Experts.................................   84
Where You Can Find More Information.....   84
Index to Financial Statements...........  F-1
Underwriting............................  U-1
</TABLE>

    
 
                               ------------------
 
     Through and including             , 2000 (the 25th day after the date of
this prospectus), all dealers effecting transactions in these securities,
whether or not participating in this offering, may be required to deliver a
prospectus. This is in addition to a dealer's obligation to deliver a prospectus
when acting as an underwriting and with respect to an unsold allotment or
subscription.
-------------------------------------------------------
-------------------------------------------------------
-------------------------------------------------------
-------------------------------------------------------
 
   
                                4,000,000 Shares
    
 
   
                             CABOT MICROELECTRONICS
    
 
   
                                  CORPORATION
    
 
                                  Common Stock
 
                               ------------------
 
                          [Cobot MicroElectronic logo]
 
                               ------------------
 
                              GOLDMAN, SACHS & CO.
 
                              MERRILL LYNCH & CO.
 
                               ROBERTSON STEPHENS
 
                      Representatives of the Underwriters
-------------------------------------------------------
-------------------------------------------------------

<PAGE>   116
 

                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 

ITEM 13.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
     The following table sets forth expenses and costs payable by Cabot
Microelectronics (other than underwriting discounts and commissions) expected to
be incurred in connection with the issuance and distribution of the securities
described in this registration statement. All amounts are estimated except for
the Securities and Exchange Commission's registration fee and the National
Association of Securities Dealers' filing fee.
 
   

<TABLE>
<CAPTION>
                                                                AMOUNT
                                                                ------
<S>                                                           <C>
Registration fee under Securities Act.......................  $   20,645
NASD filing fee.............................................       8,000
Nasdaq National Market fees.................................      95,000
Legal fees and expenses.....................................   1,175,000
Accounting fees and expenses................................     759,000
Printing and engraving expenses.............................     200,000
Registrar and transfer agent fees...........................       3,000
Miscellaneous expenses......................................      39,355
                                                              ----------
          Total.............................................  $2,300,000
                                                              ==========
</TABLE>

    
 
---------------
* To be filed by amendment.
 

ITEM 14.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
     Section 145 of the Delaware General Corporation Law (the "DGCL") provides
that a corporation may indemnify directors and officers as well as other
employees and individuals against expenses (including attorneys' fees),
judgments, fines and amounts paid in settlement in connection with specified
actions, suits and proceedings, whether civil, criminal, administrative, or
investigative (other than an action by or in the right of the corporation -- a
"derivative action"), if they acted in good faith and in a manner they
reasonably believed to be in or not opposed to the best interests of the
corporation and, with respect to any criminal action or proceeding, had no
reasonable cause to believe their conduct was unlawful. A similar standard is
applicable in the case of derivative actions, except that indemnification only
extends to expenses (including attorneys' fees) incurred in connection with the
defense or settlement of such action, and the statute requires court approval
before there can be any indemnification where the person seeking indemnification
has been found liable to the corporation. The statute provides that it is not
exclusive of other indemnification that may be granted by a corporation's
certificate of incorporation, bylaws, disinterested director vote, stockholder
vote, agreement, or otherwise.
 
     Our bylaws and our certificate of incorporation require us to indemnify to
the fullest extent authorized by the DGCL any person made or threatened to be
made a party to an action, suit or proceeding, whether criminal, civil,
administrative or investigative, by reason of the fact that he or she is or was
a director or officer of the Company, or is or was serving at the request of the
Company as a director, officer, employee or agent of another corporation or of a
partnership, joint venture, trust or other enterprise.
 
     As permitted by section 102(b)(7) of the DGCL, our certificate of
incorporation eliminates the liability of a director to the corporation or its
stockholders for monetary damages for such breach of fiduciary duty as a
director, except for liabilities arising (a) from any breach of the director's
duty of loyalty to the corporation or its stockholders; (b) from acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law; (c) under
 
                                      II-1

<PAGE>   117
 
section 174 of the DGCL; or (d) from any transaction from which the director
derived an improper personal benefit.
 
     We intend to obtain primary and excess insurance policies insuring its
directors and officers and those of its subsidiaries against certain liabilities
they may incur in their capacity as directors and officers. Under these
policies, the insurer, on our behalf, may also pay amounts for which we have
granted indemnification to the directors or officers.
 
     Additionally, reference is made to the Underwriting Agreement filed as
Exhibit 1.1 to this registration statement, which provides for indemnification
by our Underwriters, their directors and officers who sign the registration
statement and persons who control us, under certain circumstances.
 

ITEM 15.  RECENT SALES OF UNREGISTERED SECURITIES.
 
     None.
 

ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
     (A) Exhibits
 
     The following documents are filed as exhibits to this registration
statement:
 
   

<TABLE>
<CAPTION>
EXHIBIT
NUMBER                       EXHIBIT DESCRIPTION
-------  ------------------------------------------------------------
<C>      <S>
   1.1   Form of Underwriting Agreement.*
   3.1   Certificate of Incorporation of Cabot Microelectronics
         Corporation.*
   3.2   By-Laws of Cabot Microelectronics Corporation.*
   4.1   Form of Cabot Microelectronics Corporation common stock
         certificate.*
   4.2   Rights Agreement.*
   5.1   Opinion of Fried, Frank, Harris, Shriver & Jacobson
         regarding the legality of the shares being registered.*
  10.1   Master Separation Agreement, between Cabot Microelectronics
         Corporation and Cabot Corporation.*
  10.2   IPO and Distribution Agreement, between Cabot
         Microelectronics Corporation and Cabot Corporation.*
  10.3   Tax Sharing Agreement, between Cabot Microelectronics
         Corporation and Cabot Corporation.*
  10.4   Management Services Agreement, between Cabot
         Microelectronics Corporation and Cabot Corporation.*
  10.5   Fumed Metal Oxide Supply Agreement, between Cabot
         Microelectronics Corporation and Cabot Corporation.**+
  10.6   Confidential Disclosure and License Agreement, between Cabot
         Microelectronics Corporation and Cabot Corporation.*
  10.7   Trademark License Agreement, between Cabot Microelectronics
         Corporation and Cabot Corporation.*
  10.8   Dispersion Services Agreement, between Cabot
         Microelectronics Corporation and Cabot Corporation.**+
  10.9   Employee Matters Agreement, between Cabot Microelectronics
         Corporation and Cabot Corporation.*
 10.10   Registration Rights Agreement, between Cabot
         Microelectronics Corporation and Cabot Corporation.*
 10.11   Purchase Agreement between Cabot Corporation and Intel
         Corporation.**+
 10.12   Services Agreement by and among Davies -- Imperial Coatings,
         Inc., Cabot Corporation, Donn Davies and JoAnn Davies.**+
</TABLE>

    
 
                                      II-2

<PAGE>   118
 
   

<TABLE>
<CAPTION>
EXHIBIT
NUMBER                       EXHIBIT DESCRIPTION
-------  ------------------------------------------------------------
<C>      <S>
 10.13   Sublease for Barry, Wales facility.*
 10.14   2000 Equity Incentive Plan.*
 10.15   2000 Employee Stock Purchase Plan.*
  23.1   Consent of PricewaterhouseCoopers, LLP
  23.2   Consent of Fried, Frank, Harris, Shriver & Jacobson
         (included in Exhibit 5.1).*
  23.3   Consent of Juan Cabot Enriquez
  23.4   Consent of John P. Frazee, Jr.
  23.5   Consent of Steven V. Wilkinson
  24.1   Power of Attorney.**
  27.1   Financial Data Schedule.
</TABLE>

    
 
---------------
* To be filed by amendment.
** Previously filed.
+ Portions of these exhibits have been omitted pursuant to a request for
  confidential treatment.
 
     (B) Financial Statement Schedules
 
     Financial statement schedules have been omitted because they are not
applicable or the required information is shown in the combined financial
statements or notes thereto.
 

ITEM 17.  UNDERTAKINGS.
 
     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.
 
     The undersigned registrant hereby undertakes that:
 
     (1) To provide to the underwriters at the closing specified in the
underwriting agreement certificates in such denominations and registered in such
names as required by the underwriters to permit prompt delivery to each
purchaser.
 
     (2) For purposes of determining any liability under the Securities Act of
1933, the information omitted from the form of prospectus filed as part of this
registration statement in reliance upon Rule 430A and contained in a form of
prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h)
under the Securities Act shall be deemed to be part of this registration
statement as of the time it was declared effective.
 
     (3) For the purpose of determining any liability under the Securities Act
of 1933, each post-effective amendment that contains a form of prospectus shall
be deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.
 
                                      II-3

<PAGE>   119
 

                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Amendment No. 2 to the Registration Statement to be signed
on its behalf by the undersigned, thereunto duly authorized, in the City of
Aurora, State of Illinois, on March 15, 2000.
    
 
                                          CABOT MICROELECTRONICS CORPORATION
 
                                          By:     /s/ MATTHEW NEVILLE
                                            ------------------------------------
                                              Matthew Neville
                                              President and Chief Executive
                                              Officer
 
   
     Pursuant to the requirements of the Securities Act, this Amendment No. 2 to
the Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
    
 
   

<TABLE>
<CAPTION>
               SIGNATURE                                 TITLE                          DATE
               ---------                                 -----                          ----
<C>                                        <S>                                   <C>
                                           Chairman of the Board
                   *
---------------------------------------
           Kennett F. Burnes
 
                                           President and Chief Executive
                                             Officer, Director (Principal
                                             Executive Officer)
          /s/ MATTHEW NEVILLE                                                    March 15, 2000
---------------------------------------
            Matthew Neville
 
                                           Vice President, Chief Financial
                                             Officer and Treasurer (Principal
                                             Financial and Accounting
                                             Officer)
        /s/ WILLIAM C. MCCARTHY                                                  March 15, 2000
---------------------------------------
          William C. McCarthy
 
                                           Director
                   *
---------------------------------------
           Samuel W. Bodman
 
                                           Director
                   *
---------------------------------------
          William P. Noglows
 
       *By: /s/ MATTHEW NEVILLE                                                  March 15, 2000
  ----------------------------------
            Matthew Neville
           Attorney-in-Fact
</TABLE>

    
 
                                      II-4





<PAGE>   1
 
                                                                    EXHIBIT 23.1
 
                       CONSENT OF INDEPENDENT ACCOUNTANTS
 
   
     We hereby consent to the use in this Registration Statement on Form S-1
(No. 333-95093) of our report dated November 5, 1999 relating to the financial
statements of Cabot Microelectronics Materials Division, a division of Cabot
Corporation, which appears in such Registration Statement. We also consent to
the references to us under the headings "Experts" and "Selected Financial Data"
in such Registration Statement.
    
 
                                            /s/ PRICEWATERHOUSECOOPERS LLP
 
Boston, Massachusetts
   
March 14, 2000
    





<PAGE>   1
                                                                    Exhibit 23.3



                                    CONSENT


   
     The undersigned, Juan Enriquez-Cabot, has agreed to become a director of
Cabot Microelectronics Corporation (the "Company") upon the effectiveness of the
Company's Registration Statement on Form S-1, File No. 333-95093, as amended
(the "Registration Statement") filed with the Securities and Exchange Commission
in connection with the Company's initial public offering. The undersigned hereby
consents to being named as a director designee in the Registration Statement.
    


   
Dated: March 1, 2000                         /s/ Juan Enriquez-Cabot
                                             ________________________________
                                             Juan Enriquez-Cabot
    







<PAGE>   1
                                                                    Exhibit 23.4



                                    CONSENT


     The undersigned, John P. Frazee, Jr., has agreed to become a director of
Cabot Microelectronics Corporation (the "Company") upon the effectiveness of the
Company's Registration Statement on Form S-1, File No. 333-95093, as amended
(the "Registration Statement") filed with the Securities and Exchange Commission
in connection with the Company's initial public offering. The undersigned hereby
consents to being named as a director designee in the Registration Statement.


   
Dated: March 2, 2000                         /s/ John P. Frazee, Jr.
                                             ________________________________
                                             John P. Frazee, Jr.
    







<PAGE>   1
                                                                    Exhibit 23.5



                                    CONSENT


     The undersigned, Steven V. Wilkinson, has agreed to become a director of
Cabot Microelectronics Corporation (the "Company") upon the effectiveness of the
Company's Registration Statement on Form S-1, File No. 333-95093, as amended
(the "Registration Statement") filed with the Securities and Exchange Commission
in connection with the Company's initial public offering. The undersigned hereby
consents to being named as a director designee in the Registration Statement.


Dated: March 1, 2000                         /s/ Steven V. Wilkinson
                                             ________________________________
                                             Steven V. Wilkinson







<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1999             SEP-30-2000
<PERIOD-START>                             OCT-01-1998             OCT-01-1999
<PERIOD-END>                               SEP-30-1999             DEC-31-1999
<EXCHANGE-RATE>                                      1                       1
<CASH>                                              38                     103
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   19,938                  22,613
<ALLOWANCES>                                        50                      50
<INVENTORY>                                      5,269                   8,617
<CURRENT-ASSETS>                                26,120                  32,695
<PP&E>                                          45,057                  52,215
<DEPRECIATION>                                   5,026                   5,815
<TOTAL-ASSETS>                                  70,274                  82,986
<CURRENT-LIABILITIES>                            7,775                   7,402
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                             0                       0
<OTHER-SE>                                      62,077                  75,056
<TOTAL-LIABILITY-AND-EQUITY>                    70,274                  82,986
<SALES>                                         98,690                  35,046
<TOTAL-REVENUES>                                98,690                  35,046
<CGS>                                           47,891                  16,188
<TOTAL-COSTS>                                   47,891                  16,188
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                   0                       0
<INCOME-PRETAX>                                 19,076                   9,048
<INCOME-TAX>                                     6,796                   3,300
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    12,280                   5,748
<EPS-BASIC>                                          0                       0
<EPS-DILUTED>                                        0                       0
        

</TABLE>