X0306 4 2020-05-12 0 0001098972 AGENUS INC AGEN 0000935679 ARMEN GARO H C/O AGENUS INC. 3 FORBES ROAD LEXINGTON MA 02421 1 1 0 0 Chairman and CEO Common Stock 2020-05-12 4 J 0 159000 2.56 A 1051155 D Common Stock 2020-05-14 4 J 0 159000 2.29 D 892155 D Common Stock 2020-05-14 4 J 0 600000 2.29 D 292155 D Common Stock 125969 I See footnote. Common Stock 863046 I See footnote. Represents a distribution from the Garo Armen 2018 2 Year AG GRAT. Represents deposit into the Garo Armen 2018 2 Year AG GRAT. Represents deposit into the Garo Armen 2020 2 Year AG GRAT. Shares are held in Dr. Armen's IRA accounts. Dr. Armen is trustee and has investment authority for the Garo Armen 2018 2 Year AG GRAT holder of 159,000 shares of our Common Stock and for the Garo Armen 2020 2 Year AG GRAT holder of 600,000 shares of our Common Stock. Dr. Armen is Chairman of the Board of Managers and a member of Antigenics LLC ("Antigenics") which as of the date of this report owns 4,046 shares of our Common Stock. Dr. Armen is a general partner in Pixie Partners, a General Partnership ("Pixie"), which as of the date of this report owns 100,000 shares of our Common Stock. Dr. Armen has a pecuniary interest in only a portion of the shares held by Antigenics and Pixie and disclaims beneficial ownership to the extent of his pecuniary interest therein. /s/Evan D. Kearns, as Attorney-in-Fact for Garo H. Armen 2020-05-15