=============================================================================== SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ----------------------- SCHEDULE 14D-9/A (RULE 14d-101) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1) ----------------------- IMCLONE SYSTEMS INCORPORATED (Name of Subject Company) ----------------------- IMCLONE SYSTEMS INCORPORATED (Name of Person Filing Statement) ----------------------- Common Stock, par value $.001 per share (Title of Class of Securities) 45245W109 (CUSIP Number of Class of Securities) John B. Landes, Esq. Senior Vice President, Legal & General Counsel ImClone Systems Incorporated 180 Varick Street New York, NY 10014 212-645-1405 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications on Behalf of the Person Filing Statement) With a Copy to: Phillip R. Mills, Esq. Davis Polk & Wardwell 450 Lexington Avenue New York, NY 10017 212-450-4000 |_| Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer. =============================================================================== This Amendment No. 1 amends and supplements the Schedule 14D-9 filed with the Securities and Exchange Commission (the "SEC") on September 28, 2001 (the "Schedule 14D-9"), by ImClone Systems Incorporated (the "Company"), relating to the tender offer by Bristol-Myers Squibb Biologics Company ("Purchaser"), a wholly owned subsidiary of Bristol-Myers Squibb Company ("Parent"), to purchase up to 14,392,003 shares of the Company's common stock, par value $.001 per share (the "Shares"), for $70.00 per Share, net to the seller in cash, upon the terms and subject to the conditions set forth in Purchaser's Offer to Purchase, dated September 28, 2001, and in the related Letter of Transmittal (which, together with any amendments or supplements thereto, collectively constitute the "Offer"). The Offer is described in the Tender Offer Statement on Schedule TO, dated September 28, 2001, which was filed with the SEC on September 28, 2001 by Purchaser and Parent. Item 8. Additional Information. Item 8 of the Schedule 14D-9 is hereby amended and supplemented by adding the following paragraph at the end of the subsection entitled "Antitrust": The waiting period with respect to the Offer under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 expired at 11:59 p.m. on October 11, 2001. 2 SIGNATURE After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: October 12, 2001 IMCLONE SYSTEMS INCORPORATED By: /s/ John B. Landes ------------------------------------- Name: John B. Landes Title: Senior Vice President, Legal & General Counsel 3