AMENDMENT AGREEMENT The Letter Agreement of June 3, 1998 between Antigenics L.L.C. and Sigma-Tau Industrie Farmaceutiche Riunite S.p.A. is hereby amended as follows: -ON PAGE 1, THE INITIAL SIX LINES: "Gentlemen: We refer to our recent discussions...Amendment Agreement • January 10th, 2000 • Antigenics Inc /De/ • Biological products, (no disgnostic substances)
FLEXIBLE STANDARDIZED 401(k) PROFIT SHARING PLAN ADOPTION AGREEMENT =========== ===================================================================== --------- ----------------------------------------------------------------------- SECTION 1. EMPLOYER...Antigenics Inc /De/ • January 10th, 2000 • Biological products, (no disgnostic substances)
2 3 filing pursuant to such Rule 424(b) (and Rule 434, if applicable) or from and after the time it is first provided to the Underwriters by the Company for such use. The term "Preliminary Prospectus" as used herein means the preliminary prospectus...Antigenics Inc /De/ • January 10th, 2000 • Biological products, (no disgnostic substances) • New York
