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): December 8, 2006 CELGENE CORPORATION (Exact name of registrant as specified in its charter) Delaware 0-16132 22-2711928 -------------------------------------------------------------------------------- (State or other jurisdiction of (Commission File Number) (IRS Employer incorporation) Identification No.) 86 Morris Avenue, Summit, New Jersey 07901 -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (908) 673-9000 -------------------------------------------------------------------------------- (Former name or former address, if changed since last report.) 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 1.01 ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT. On December 11, 2006, Celgene Corporation, or the Company, announced that on December 8, 2006 it entered into a material definitive agreement for the purchase of an active pharmaceutical ingredient (API) manufacturing facility from Siegfried Ltd. located in Zofingen, Switzerland, and simultaneously consummated such purchase. The Company is purchasing the assets for approximately a total of $46.5 million in cash, with an initial payment of $12.5 million. The manufacturing facility has the capability to produce multiple drug substances and initially will be used to produce REVLIMID(R) to supply global markets. Attached hereto as Exhibit 99.1 is the Press Release announcing the transaction. ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS. Exhibit 99.1 Press Release dated December 11, 2006 announcing the acquisition of an API manufacturing facility from Siegfried Ltd. SIGNATURES Pursuant to the requirements of the Securities and Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. CELGENE CORPORATION Date: December 12, 2006 By: /s/ Robert J. Hugin ----------------------------------- Name: Robert J. Hugin Title: President and Chief Operating Officer EXHIBIT INDEX Exhibit No. Description ----------- ----------- Exhibit 99.1 Press Release dated December 11, 2006 announcing the acquisition of an API manufacturing facility from Siegfried Ltd.