Altimmune, Inc. — Director's Dealing 2026

Jan 27, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Altimmune, Inc. (ALT)
CIK: 0001326190
Period of Report: 2026-01-25

Reporting Person: Jordt Raymond M (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-25	Common Stock, par value $0.0001	M	14600	—	Acquired	57770	Direct
2026-01-25	Common Stock, par value $0.0001	F	3855	$5.50	Disposed	53915	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-25	Restricted Stock Units	$	M	14600	Disposed		Common Stock, par value $0.0001 (14600)	Direct

Footnotes

F1: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.0001, when vested.

F2: Vesting transaction: Shares surrendered to the Issuer solely to cover taxes associated with vesting of RSUs.

F3: The RSUs vest in substantially equal annual installments over the 4 years following January 25, 2024, subject to the reporting person's continued service through the applicable vesting date, and have no expiration date.