Cabot Microelectronics to Present at the 13th Annual Needham Growth Stock Conference

Cabot Microelectronics Corporation (Nasdaq: CCMP), the world’s leading supplier of chemical mechanical planarization (CMP) slurries and a growing CMP pad supplier to the semiconductor industry, announced today that it is scheduled to present at the 13th Annual Needham Growth Stock Conference in New York City at 10:00 a.m. Eastern Time on Thursday, January 13, 2011. Forward looking and other material information may be discussed during the presentation. A live webcast and replay of the presentation will be available in the Investor Relations section of the company’s website at www.cabotcmp.com.

ABOUT CABOT MICROELECTRONICS CORPORATION

Cabot Microelectronics Corporation, headquartered in Aurora, Illinois, is the world's leading supplier of CMP polishing slurries and 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 925 employees on a global basis. For more information about Cabot Microelectronics Corporation, visit www.cabotcmp.com or contact Amy Ford, Director of Investor Relations at 630-499-2600.