Vipin K. Garg - 31 Jan 2022 Form 4 Insider Report for Altimmune, Inc. (ALT)

Role: President and CEO, Director
Signature: /s/ Kent Tapper, as Attorney-in-Fact
Issuer symbol: ALT
Transactions as of: 31 Jan 2022
Net transactions value: -$42,174
Form type: 4
Filing time: 03 Feb 2022, 18:56:01 UTC
Previous filing: 31 Jan 2022
Next filing: 01 Mar 2022
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	Award	$18,913	+2,757	+0.98%	$6.86	283,958	31 Jan 2022	Direct	F1, F2
transaction	ALT	Common Stock, par value $0.0001	Options Exercise	$0	+16,545	+5.8%	$0.000000	300,503	01 Feb 2022	Direct	F3
transaction	ALT	Common Stock, par value $0.0001	Tax liability	$61,087	-7,655	-2.5%	$7.98	292,848	01 Feb 2022	Direct	F4

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	-16,545	-25%	$0.000000	49,636	01 Feb 2022	Common Stock, par value $0.0001	16,545		Direct	F3, F5
transaction	ALT	Stock Options (option to buy)	Award	$0	+223,000		$0.000000	223,000	02 Feb 2022	Common Stock, par value $0.0001	223,000	$7.53	Direct	F6
transaction	ALT	Restricted Stock Units	Award	$0	+75,800		$0.000000	75,800	02 Feb 2022	Common Stock, par value $0.0001	75,800		Direct	F3, F7

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

Explanation of Responses:

Id	Content
F1	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, 2021 through January 31, 2022.
F2	In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the issuer's common stock on January 31, 2022.
F3	Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.0001, when vested.
F4	Vesting transaction: Shares surrendered to the Issuer solely to cover taxes associated with vesting of RSUs.
F5	The RSUs become vested and exercisable 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.
F6	Twenty-five percent of the shares underlying the option become vested and exercisable on February 2, 2023 and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following February 2, 2023, subject to the reporting person's continued service through the applicable vesting date.
F7	The RSUs become vested and exercisable 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.