Form 4 Filing for Garo H. Armen

Garo H. Armen, Chairman, Chief Executive Officer and Principal Financial Officer of AGENUS INC, reported the acquisition of 1,165,300 shares of Common Stock through stock options on April 24, 2026. These options were granted under the Agenus Inc. 2019 Amended and Restated Equity Incentive Plan. One tranche of 1,000,000 options, with an exercise price of $3.90, vests over three years starting April 24, 2027. Another tranche of 27,750 options, also with an exercise price of $3.90, vests in full on May 24, 2026. A third tranche of 137,550 options, with an exercise price of $3.90, vests in full on May 24, 2026, awarded in lieu of the 2025 annual cash bonus. All options expire on April 24, 2036.