________________________________________________________________________________ - -------------------------------------------------------------------------------- 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 FEBRUARY 17, 2000 0-16132 - ----------------------------------- -------------------------------- Date of Report Commission File Number (Date of earliest event reported) CELGENE CORPORATION (Exact name of registrant as specified in its charter) DELAWARE 22-2711928 - ----------------------------------- -------------------------------- (State or other jurisdiction (I.R.S. Employer of incorporation or organization) Identification Number) 7 Powder Horn Drive Warren, New Jersey 07059 ------------------------------------------------------------------- (Address of Principal Executive Offices) (Zip Code) (732) 271-1001 ------------------------------------------------------------------- (Registrant's telephone number, including area code) ________________________________________________________________________________ - -------------------------------------------------------------------------------- ITEM 5. OTHER EVENTS. On February 17, 2000, Celgene Corporation (the "Company") amended the Rights Agreement, dated as of September 16, 1996 between the Company and American Stock Transfer & Trust Company, as Rights Agent (the "Rights Agreement"), changing the initial exercise price thereunder from $100.00 per Right (as defined in the Rights Agreement) to $700.00 per Right and extending the Final Expiration Date (as that term is defined in the Rights Agreement) to February 17, 2010. Amendment Number One to the Rights Agreement is filed as an exhibit hereto and is hereby incorporated by reference. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. (a) not applicable (b) not applicable (c) EXHIBITS 99 Amendment Number One to the Rights Agreement dated as of September 16, 1996 between Celgene Corporation and American Stock Transfer & Trust Company, as Rights Agent. 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. Date: February 18, 2000 CELGENE CORPORATION By: /S/ JOHN W. JACKSON ------------------------------- Name: John W. Jackson Title: Chairman of the Board and Chief Executive Officer EXHIBIT INDEX Exhibit Description Page ------- ------------------------------------------------------ ---- 99 Amendment Number One to the Rights Agreement dated as of September 16, 1996 between Celgene Corporation and American Stock Transfer & Trust Company, as Rights Agent.