X0609 4 2026-08-10 0001098972 AGENUS INC AGEN 0000935679 ARMEN GARO H false C/O AGENUS INC. 3 FORBES ROAD LEXINGTON MA 02421 true true false false See Remarks false Stock Option 7.78 2026-08-10 4 A false 1971500 0.00 A 2036-08-10 Common Stock 1971500 1971500 D Option awarded in accordance with the Agenus Inc. Amended and Restated 2019 Equity Incentive Plan. The options are divided into five equal tranches, each of which vests only if the Company's stock price achieves and sustains, for 30 consecutive calendar days during the five-year performance period, a level equal to 3x, 4x, 5x, 6x, and 8x, respectively, of the measurement price of $7.78 per share, subject in each case to a minimum three-year service requirement. Chairman, Chief Executive Officer and Principal Financial Officer /s/ Melissa Orilall, as Attorney-in-Fact for Garo H. Armen 2026-08-12