0001326190-26-000006 Sample Contracts

SECURITIES PURCHASE AGREEMENT
Securities Purchase Agreement • January 28th, 2026 • Altimmune, Inc. • Pharmaceutical preparations • New York

This Securities Purchase Agreement (this “Agreement”) is dated as of January 27, 2026, between Altimmune, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively the “Purchasers”).

PLACEMENT AGENCY AGREEMENT
Placement Agency Agreement • January 28th, 2026 • Altimmune, Inc. • Pharmaceutical preparations • New York