X0508 4 2024-02-05 0001098972 AGENUS INC AGEN 0001758521 Jeynes-Ellis Allison M C/O AGENUS INC. 3 FORBES ROAD LEXINGTON MA 02421 true false false false false Stock Option 12.6 2024-02-05 4 A false 5000 0.00 A 2034-02-05 Common Stock 5000 5000 D The Stock Options were awarded in accordance with the Agenus Inc. 2019 Amended and Restated Equity Incentive Plan on February 5, 2024 and will vest on February 5, 2025. The Stock Options were granted prior to the 1 for 20 reverse stock split, representing 100,000 Stock Options with an exercise price of $0.63. /s/Christine Klaskin, as Attorney-in-Fact for Allison Jeynes-Ellis 2024-04-22