Vipin K. Garg - Jan 30, 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 30, 2025
Transactions value $: -$163,649
Form type: 4
Date filed: 2/3/2025, 08:50 PM
Previous filing: Jan 28, 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	+26.8K	+8.48%	$0.00	343K	Jan 30, 2025	Direct	F2
transaction	ALT	Common Stock, par value $0.0001	Tax liability	-$81.9K	-11.7K	-3.41%	$7.00	331K	Jan 30, 2025	Direct	F1
transaction	ALT	Common Stock, par value $0.0001	Award	$21.3K	+4.11K	+1.24%	$5.18	335K	Jan 31, 2025	Direct	F3, F4
transaction	ALT	Common Stock, par value $0.0001	Options Exercise	$0	+16.5K	+4.94%	$0.00	352K	Feb 1, 2025	Direct	F2
transaction	ALT	Common Stock, par value $0.0001	Tax liability	-$48K	-7.23K	-2.06%	$6.64	344K	Feb 1, 2025	Direct	F1
transaction	ALT	Common Stock, par value $0.0001	Options Exercise	$0	+19K	+5.5%	$0.00	363K	Feb 2, 2025	Direct	F2
transaction	ALT	Common Stock, par value $0.0001	Tax liability	-$55K	-8.28K	-2.28%	$6.64	355K	Feb 2, 2025	Direct	F1

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	+26.8K	+100%	$0.00	53.6K	Jan 30, 2025	Common Stock, par value $0.0001	26.8K		Direct	F1, F5
transaction	ALT	Restricted Stock Units	Options Exercise	$0	+16.5K		$0.00	0	Feb 1, 2025	Common Stock, par value $0.0001	16.5K		Direct	F1, F6
transaction	ALT	Restricted Stock Units	Options Exercise	$0	+19K		$0.00	19K	Feb 2, 2025	Common Stock, par value $0.0001	19K		Direct	F1, F7

* 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	These shares were purchased due to participation by the reporting individual in the Issuer's 2019 Employee Stock Purchase Plan ("ESPP"). It pertains to the ESPP purchase period from August 1, 2024 through January 31, 2025.
F4	In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the Issuer's common stock on August 1, 2024.
F5	The RSUs vest in substantially equal annual installments over the 4 years following January 30, 2023, subject to the reporting person's continued service through the applicable vesting date, and have no expiration date.
F6	The RSUs vest in substantially equal annual installments over the 4 years following February 1, 2021, subject to the reporting person's continued service through the applicable vesting date, and have no expiration date.
F7	The RSUs vest in substantially equal annual installments over the 4 years following February 2, 2022, subject to the reporting person's continued service through the applicable vesting date, and have no expiration date.