Press Releases
April 8, 2010

Alexion Pharmaceuticals to Report First Quarter Results on Thursday, April 22, 2010

CHESHIRE, Ct., Apr 08, 2010 (BUSINESS WIRE) -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN), today announced that the Company will report its financial results for the first quarter ended March 31, 2010 on Thursday, April 22, 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, April 22, 2010, at 10:00 a.m. Eastern Time (ET).

To participate in this conference call, dial 719-325-4834, confirmation code 6934870 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 6934870. The audio web cast can be accessed at: www.alexionpharma.com.

[ALXN-G]

SOURCE: Alexion Pharmaceuticals, Inc.

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

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