Press Releases
June 2, 2010

Alexion to Present at Investor Conferences

CHESHIRE, Conn., Jun 02, 2010 (BUSINESS WIRE) -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN) today announced that management will present at two upcoming investor conferences:

Mr. Vikas Sinha, Chief Financial Officer of Alexion, will present at the 9th Annual Needham Healthcare Conference in New York City on Wednesday, June 9th at 11:20 a.m., Eastern Time.

Dr. Leonard Bell, Chief Executive Officer of Alexion, will present at the Jefferies 2010 Global Life Sciences Conference in New York City on Thursday, June 10th at 8:00 a.m., Eastern Time.

An audio webcast of each presentation will be available live. You can access the webcasts at: www.alexionpharma.com. An archived version of the remarks will also be available through the Company's web site for a limited time following the conference.

[ALXN-G]

SOURCE: Alexion Pharmaceuticals, Inc.

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

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