• Altimmune President and CEO Jerome Benedict Durso bought 15,000 common shares at $2.95.
• Directly held stake rose to 62,500 shares.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Altimmune Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001698665-26-000007), on August 13, 2026, and is solely responsible for the information contained therein.