Press Releases
January 28, 2010

Alexion Pharmaceuticals to Report Fourth Quarter and Full Year 2009 Results on February 11, 2010

CHESHIRE, Conn., Jan 28, 2010 (BUSINESS WIRE) -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN), today announced that the Company will report its financial results for the fourth quarter and year ended December 31, 2009 on Thursday, February 11, 2010 before the financial markets open. Following the release of the financial results, Alexion management will conduct a conference call and audio web cast on Thursday, February 11, 2010, at 10:00 a.m. Eastern Time (ET).

To participate in this conference call, dial 785-830-7991, confirmation code 2369934 shortly before 10:00 a.m. ET. A replay of the call will be available from 1:00 p.m. ET through a limited time thereafter. The replay number is 719-457-0820, confirmation code 2369934. The audio web cast can be accessed at: www.alexionpharm.com.

[ALXN-G]

SOURCE: Alexion Pharmaceuticals, Inc.

Alexion Pharmaceuticals, Inc.
Irving Adler, 203-271-8210
Sr. Director, Corporate Communications
or
Makovksy + Company
Media:
Mark Marmur, 212-508-9670
or
Rx Communications
Investors
Rhonda Chiger, 917-322-2569

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