Vipin K. Garg - Jan 25, 2025 Form 4 Insider Report for Altimmune, Inc. (ALT)

Role: President and CEO, Director
Signature: /s/ Greg Weaver, as Attorney-in-Fact
Stock symbol: ALT
Transactions as of: Jan 25, 2025
Transactions value $: -$126,736
Form type: 4
Date filed: 1/28/2025, 09:04 PM
Previous filing: Feb 5, 2024
Next filing: Feb 3, 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALT	Common Stock, par value $0.0001	Options Exercise	$0	+42.1K	+14.4%	$0.00	334K	Jan 25, 2025	Direct	F1
transaction	ALT	Common Stock, par value $0.0001	Tax liability	-$127K	-18.2K	-5.43%	$6.98	316K	Jan 25, 2025	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ALT	Restricted Stock Units	Options Exercise	$0	+42.1K	+50%	$0.00	126K	Jan 25, 2025	Common Stock, par value $0.0001	42.1K		Direct	F1, F3
transaction	ALT	Stock Options (option to buy)	Award	$0	+478K		$0.00	478K	Jan 27, 2025	Common Stock, par value $0.0001	478K	$7.00	Direct	F4
transaction	ALT	Restricted Stock Units	Award	$0	+165K		$0.00	165K	Jan 27, 2025	Common Stock, par value $0.0001	165K		Direct	F1, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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.
F4	Twenty-five percent of the shares underlying the option become vested and released on January 27, 2026 and the remaining 75% of the shares underlying the option become vested and released in substantially equal monthly installments over the 36 months following January 27, 2026, subject to the reporting person's continued service through the applicable vesting date.
F5	The RSUs vest in substantially equal annual installments over the 4 years following January 27, 2025, subject to the reporting person's continued service through the applicable vesting date, and have no expiration date.