X0303 4 2010-01-19 0 0001098972 ANTIGENICS INC /DE/ AGEN 0001377202 Sharp Shalini C/O ANTIGENICS INC. 162 FIFTH AVE., SUITE 900 NEW YORK NY 10010 0 1 0 0 CFO Common Stock 2010-01-19 4 A 0 136421 0.9 A 300916 D Common Stock 2010-01-20 4 S 0 63848 0.8534 A 237068 D Represents settlement of restricted stock granted on January 19, 2010 in lieu of an annual cash bonus for 2009 performance. Represents only shares sold to cover minimum federal, state and local tax withholding requirements upon the vesting of the restricted shares granted in lieu of an annual cash bonus for 2009 performance. This sale has been made through a Rule 10b5-1 trading plan. Christine M. Klaskin, by Power of Attorney 2010-01-21