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Sirius XM Radio Inc. to Join the NASDAQ-100 Index Beginning July 15, 2011

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NEW YORK, July 8, 2011 (GLOBE NEWSWIRE) -- Sirius XM Radio Inc. (Nasdaq:SIRI) will become a component of the NASDAQ-100 Index® (Nasdaq:NDX), the NASDAQ-100 Equal Weighted Index (Nasdaq:NDXE) and the NASDAQ-100 Ex-Tech Sector Index (Nasdaq:NDXX) prior to market open on Friday, July 15, 2011. Sirius XM Radio Inc. will replace Cephalon, Inc. (Nasdaq:CEPH). 

Sirius XM Radio Inc. is headquartered in New York, NY, and has a market capitalization of approximately $8.6 billion. For more information about the company, go to www.siriusxm.com.

The NASDAQ-100 Index, launched in January 1985, is one of the most widely followed benchmarks in the world.

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CONTACT: Media Contact: Wayne Lee, NASDAQ +1.301.978.4875 Issuer & Investor Contact: Lisa Chaney, NASDAQ +1.301.978.8281

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