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) December 12, 2001 ----------------- ALEXION PHARMACEUTICALS, INC. ----------------------------- (Exact Name of Registrant as Specified in its Charter) Delaware 0-27756 13-3648318 ---------------------------- ----------- ------------------ (State or Other Jurisdiction (Commission (IRS Employer of Incorporation) File Number) Identification No.) 352 Knotter Drive Cheshire, CT 06410 ----------------------------------------- -------- (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: (203) 272-2596 ----------------- Not Applicable -------------- (Former Name or Former Address, if Changed Since Last Report) ITEM 5. OTHER EVENTS On December 12, 2001, Alexion Pharmaceuticals, Inc. issued the press release filed herewith as Exhibit 99.1. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. (C) EXHIBITS. 99.1 Press Release dated December 12, 2001. SIGNATURES 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. ALEXION PHARMACEUTICALS, INC. Date: December 12, 2001 By: /s/ Leonard Bell ----------------------------- Name: Leonard Bell, M.D. Title: President, Chief Executive Officer, Secretary and Treasurer EXHIBIT INDEX ------------- 99.1 Press Release dated December 12, 2001.