Form 4 Filing for Altimmune, Inc.

This filing details a Form 4 submission for Altimmune, Inc. (ALT) concerning transactions by reporting owner Jerome Benedict Durso. On December 22, 2025, Durso acquired 12,500 shares of the company's common stock through a purchase transaction. The weighted average price per share was $4.1255, with individual transactions occurring at prices ranging from $4.1200 to $4.1300. Following this transaction, Durso holds 12,500 shares. The filing was signed by Gregory Weaver as Attorney-in-Fact. This transaction is classified as an acquisition of securities.