CCMP CMC Materials Inc

What: Cabot Microelectronics Corporation (CCMP) will visit the NASDAQ MarketSite in New York City's Times Square to celebrate its 10th anniversary as a public company.

In honor of the occasion, William Noglows, Chairman and Chief Executive Officer, will preside over the NASDAQ Closing Bell.

When: Thursday, June 3rd, 2010 at 3:45 p.m. to 4:00 p.m. ET   

Contacts: Amy Ford (630) 375-5412 Amy_Ford@cabotcmp.com

NASDAQ MarketSite: Robert Madden (646) 441-5045 Robert.Madden@NASDAQOMX.com

Feed Information:

The Closing Bell is available from 3:50 p.m. to 4:05 p.m. on AMC-3/C-3 (ul 5985V; dl 3760H). The feed can also be found on Ascent fiber 1623. If you have any questions, please contact Robert Madden at (646) 441-5045.

Radio Feed:

An audio transmission of the Closing Bell is also available from 3:50 p.m. to 4:05 p.m. on uplink IA6 C band / transponder 24, downlink frequency 4180 horizontal. The feed can be found on Ascent fiber 1623 as well.

Facebook and Twitter:

For multimedia features such as exclusive content, photo postings, status updates and video of bell ceremonies please visit our Facebook page at: http://www.facebook.com/pages/NASDAQ-OMX/108167527653

For news tweets, please visit our Twitter page at: http://twitter.com/nasdaqomx

Webcast:

A live webcast of the NASDAQ Closing Bell will be available at: http://www.nasdaq.com/about/marketsitetowervideo.asx

Photos:

To obtain a high-resolution photograph of the Market Close, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market close of your choice.

About Cabot Microelectronics Corporation (CCMP):

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 900 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.

About NASDAQ OMX:

The NASDAQ OMX Group, Inc. is the world's largest exchange company. It delivers trading, exchange technology and public company services across six continents, with more than 3,600 listed companies. NASDAQ OMX offers multiple capital raising solutions to companies around the globe, including its U.S. listings market, NASDAQ OMX Nordic, NASDAQ OMX Baltic, NASDAQ OMX First North, and the U.S. 144A sector. The company offers trading across multiple asset classes including equities, derivatives, debt, commodities, structured products and exchange-traded funds. NASDAQ OMX technology supports the operations of over 70 exchanges, clearing organizations and central securities depositories in more than 50 countries.  NASDAQ OMX Nordic and NASDAQ OMX Baltic are not legal entities but describe the common offering from NASDAQ OMX exchanges in Helsinki, Copenhagen, Stockholm, Iceland, Tallinn, Riga, and Vilnius. For more information about NASDAQ OMX, visit http://www.nasdaqomx.com. Please follow NASDAQ OMX on Facebook (http://www.facebook.com/nasdaqomx) and Twitter (http://www.twitter.com/nasdaqomx).

NDAQA