M. Scot Roberts - 01 Feb 2024 Form 4 Insider Report for Altimmune, Inc. (ALT)

Role: Chief Scientific Officer
Signature: /s/ Richard I. Eisenstadt, as Attorney-in-Fact
Issuer symbol: ALT
Transactions as of: 01 Feb 2024
Net transactions value: -$39,509
Form type: 4
Filing time: 05 Feb 2024, 18:02:17 UTC
Previous filing: 01 Feb 2024
Next filing: 01 Aug 2024
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	+6,166	+19%	$0.000000	39,016	01 Feb 2024	Direct	F1
transaction	ALT	Common Stock, par value $0.0001	Tax liability	$17,794	-1,801	-4.6%	$9.88	37,215	01 Feb 2024	Direct	F2
transaction	ALT	Common Stock, par value $0.0001	Options Exercise	$0	+7,775	+21%	$0.000000	44,990	02 Feb 2024	Direct	F1
transaction	ALT	Common Stock, par value $0.0001	Tax liability	$21,716	-2,330	-5.2%	$9.32	42,660	02 Feb 2024	Direct	F2
holding	ALT	Common Stock, par value $0.0001						15	01 Feb 2024	Shares held by spouse of Reporting Person

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	-6,166	-50%	$0.000000	6,166	01 Feb 2024	Common Stock, par value $0.0001	6,166		Direct	F1, F3
transaction	ALT	Restricted Stock Units	Options Exercise	$0	-7,775	-33%	$0.000000	15,550	02 Feb 2024	Common Stock, par value $0.0001	7,775		Direct	F1, F4

* 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 become vested 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.
F4	The RSUs become vested 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.