Alexion Pharmaceuticals, Inc. To Join The NASDAQ-100 Index Beginning April 4, 2011

NEW YORK, March 29, 2011 (GLOBE NEWSWIRE) -- Alexion Pharmaceuticals, Inc. (Nasdaq:ALXN) 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 Monday, April 4, 2011. Alexion Pharmaceuticals, Inc. will replace Genzyme Corporation (Nasdaq:GENZ).

Alexion is headquartered in Cheshire, Connecticut and has a market capitalization of approximately $8.5 billion. For more information about the company, go to www.alexionpharm.com.

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