Form 4 Filing for Altimmune, Inc. - Sohn Catherine A. Stock Options Grant

This filing details a grant of 48,800 stock options to director Catherine A. Sohn by Altimmune, Inc. The options were granted on May 1, 2026, under the company's non-employee director compensation policy. These options carry an exercise price of $2.82 per share and will vest in equal monthly installments over the 12 months following the grant date, contingent upon continued service. The options are exercisable until their expiration date on May 1, 2036. This transaction is reported on Form 4 and indicates an acquisition of securities.