UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
_______________________
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(D) OF
THE SECURITIES EXCHANGE ACT OF 1934
Date of report (Date of earliest event reported): March 26, 2015
    
ALEXION PHARMACEUTICALS, INC.
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(Exact name of registrant as specified in its charter)

Delaware
000-27756
13-3648318
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(State or other jurisdiction of
of incorporation or organization)
(Commission
File Number)
(I.R.S. Employer
Identification No.)


352 Knotter Drive, Cheshire, Connecticut 06410
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(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code:    (203) 272-2596
   Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨
Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)
¨
Soliciting material pursuant to Rule 14a-12 under the Exchange Act
(17 CFR 240.14a-12)
¨
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act
(17 CFR 240.14d-2(b))
¨

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act
(17 CFR 240.13e-4(c))






Item 5.02
Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.

On March 21, 2015, Mr. William Keller informed the Board of Directors of Alexion Pharmaceuticals, Inc. of his decision to retire from the Board and not stand for re-election at the 2015 Annual Meeting of Shareholders to be held on May 6, 2015. Mr. Keller, a director since 2009, will continue to serve as a director until the 2015 Annual Meeting.

Signature
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: March 26, 2015
 
ALEXION PHARMACEUTICALS, INC.
 
 
By:    /s/ Michael V. Greco      
Name: Michael V. Greco
Title: Vice President of Law and Corporate Secretary