Alexion Pharmaceuticals to Report Second Quarter Results on Thursday, July 22, 2010

Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN), today announced that the Company will report its financial results for the second quarter ended June 30, 2010 on Thursday, July 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, July 22, 2010, at 10:00 a.m. Eastern Time (ET).

To participate in this conference call, dial 719-457-2642, confirmation code 4227999 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 4227999. The audio web cast can be accessed at: www.alexionpharma.com.

[ALXN-G]