Alumis Inc. Chief Medical Officer Exercises Stock Options and Acquires Common Stock

On May 22, 2026, Drappa Jorn, Chief Medical Officer of Alumis Inc., exercised stock options and acquired common stock in the company. The officer exercised two separate stock option grants: 11,317 shares at an exercise price of $8.84 per share and 15,535 shares at $5.06 per share. Following these exercises, Jorn acquired the underlying common stock, resulting in total holdings of 59,339 shares of common stock. The options were part of previously granted equity awards with vesting schedules - one grant vested 25% on August 22, 2023 with monthly vesting over 36 months, and another vested 25% on February 18, 2026 with similar monthly vesting. The transactions were reported on a Form 4 filing with the SEC, indicating routine option exercises by an executive officer rather than open market purchases.