Press Release

Aurora, IL, Nov. 26, 2013 (GLOBE NEWSWIRE) -- Cabot Microelectronics Corporation (Nasdaq:  CCMP), the world's leading supplier of chemical mechanical planarization (CMP) polishing slurries and a growing CMP pad supplier to the semiconductor industry, today announced that it has received an Outstanding Supplier Performance Award from Microchip Technology Inc., in recognition of its performance in quality, reliability and service in 2012.  Microchip recognized Cabot Microelectronics for its significant contributions in providing CMP slurries and pads solutions deemed essential to Microchip's success.

"We are very pleased to have earned this Outstanding Supplier Performance Award from Microchip," stated William Noglows, Chairman and CEO of Cabot Microelectronics. "We are committed to working closely with our customers to deliver innovative, high-quality, high-performing and reliable CMP products and solutions."

"Cabot Microelectronics has made valuable contributions to Microchip's CMP polishing platforms, by providing excellent technology and performance," said Kathy Clevenger, Microchip's Vice President of Manufacturing Operations at Fab 4.  "Its team provides Microchip with technical expertise along with excellent customer service and continuous improvement.  We appreciate the value and commitment Cabot Microelectronics brings to Microchip, and look forward to continuing our long-term relationship."

ABOUT CABOT MICROELECTRONICS CORPORATION

Cabot Microelectronics Corporation, headquartered in Aurora, Illinois, is the world's leading supplier of CMP polishing slurries and a growing CMP pad supplier to the semiconductor industry.  The company's products play a critical role in the production of advanced semiconductor devices, enabling the manufacture of smaller, faster and more complex devices by its customers.  The company's mission is to create value by developing reliable and innovative solutions, through close customer collaboration, that solve today's challenges and help enable tomorrow's technology.  Since becoming an independent public company in 2000, the company has grown to approximately 1,050 employees on a global basis.  For more information about Cabot Microelectronics Corporation, visit www.cabotcmp.com or contact Trisha Tuntland, Manager of Investor Relations at 630-499-2600.

SAFE HARBOR STATEMENT

This news release may include statements that constitute "forward looking statements" within the meaning of federal securities regulations. These forward-looking statements include statements related to:  future sales and operating results; company and industry growth, contraction or trends; growth or contraction of the markets in which the company participates; international events, regulatory or legislative activity, or various economic factors; product performance; the generation, protection and acquisition of intellectual property, and litigation related to such intellectual property; new product introductions; development of new products, technologies and markets; natural disasters; the acquisition of or investment in other entities; uses and investment of the company's cash balance; financing facilities and related debt, payment of principal and interest, and compliance with covenants and other terms; the company's capital structure; and the construction and operation of facilities by Cabot Microelectronics Corporation. These forward-looking statements involve a number of risks, uncertainties, and other factors, including those described from time to time in Cabot Microelectronics' filings with the Securities and Exchange Commission (SEC), that could cause actual results to differ materially from those described by these forward-looking statements. In particular, see "Risk Factors" in the company's annual report on Form 10-K for the fiscal year ended September 30, 2013, filed with the SEC. Cabot Microelectronics assumes no obligation to update this forward-looking information.

CONTACT: Trisha Tuntland
         Manager, Investor Relations
         630-499-2600