Press Releases
April 9, 2009

Alexion Pharmaceuticals to Report First Quarter 2009 Results on April 23, 2009

CHESHIRE, Conn., Apr 09, 2009 (BUSINESS WIRE) -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN), today announced that the Company will report its financial results for the first quarter ended March 31, 2009 on Thursday, April 23, 2009 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, April 23, 2009, at 10:00 a.m. Eastern Time (ET).

To participate in this conference call, dial 719-325-4871, confirmation code 4042547 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 4042547. 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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