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): November 3, 2003 ANTIGENICS INC. (Exact name of registrant as specified in its charter) DELAWARE 000-29089 06-1562417 (State or other (Commission file number) (I.R.S. Employer Identification No.) jurisdiction of incorporation of organization) 630 FIFTH AVENUE, SUITE 2100 NEW YORK, NEW YORK 10111 (Address of principal executive offices and zip code) (212) 994-8200 (Registrant's telephone number, including area code) Item 5. Other Events and Regulation FD Disclosure On November 3, 2003, Antigenics Inc. announced that Renu Gupta, MD, has joined the company as senior vice president of development, a new position that will be responsible for regulatory affairs, clinical development, and program and portfolio management. Antigenics also announced changes in senior management. As of April 1, 2004, Elma Hawkins, PhD, currently the company's vice chairman, will become senior advisor to the CEO. In addition, Antigenics' chief medical officer Jonathan Lewis, MD, PhD, has left the company. The responsibilities of Drs. Hawkins and Lewis will be absorbed within Antigenics' newly restructured senior management team. The full text of the press release issued in connection with the announcement is attached as Exhibit 99.1 to this current report on Form 8-K. Item 7. Financial Statements and Exhibits. (c) Exhibits: 99.1 Press Release dated November 3, 2003 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. ANTIGENICS INC. Date: November 3, 2003 By: /s/ Garo H. Armen ----------------- Garo H. Armen, Ph.D. Chairman and Chief Executive Officer EXHIBIT INDEX The following designated exhibits are filed herewith: Exhibits: 99.1 Press Release dated November 3, 2003