Steven Lo - 16 Mar 2026 Form 4 Insider Report for Vaxart, Inc. (VXRT)

Role: President, Chief Exec Officer, Director
Signature: /s/ Edward Berg, Attorney-in-Fact
Issuer symbol: VXRT
Transactions as of: 16 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 18 Mar 2026, 21:44:44 UTC
Previous filing: 08 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Lo Steven	President, Chief Exec Officer, Director	C/O VAXART, INC., 170 HARBOR WAY, SUITE 300, SOUTH SAN FRANCISCO	/s/ Edward Berg, Attorney-in-Fact	18 Mar 2026	0001501959

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	VXRT	Common Stock	Award		+846,500	+47%	$0.000000^*	2,634,059	16 Mar 2026	Direct	F1
holding	VXRT	Common Stock						100,000	16 Mar 2026	By the Lo Family Trust

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	VXRT	Stock Option (right to buy)	Award		+1,543,000		$0.000000^*	1,543,000	16 Mar 2026	Common Stock	1,543,000	$0.6795	Direct	F2

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

Explanation of Responses:

Id	Content
F1	Grant of shares upon vesting of restricted stock units. 25% of the shares underlying the award shall vest on each anniversary of the vesting commencement date of March 16, 2026, so that the restricted stock units would be fully vested on the fourth anniversary of the vesting commencement date.
F2	The shares subject to this stock option shall vest as to 25% of the shares underlying the grant on March 16, 2027, the first anniversary of the date that vesting commenced, and thereafter in 36 equal monthly installments such that the stock option shall be fully vested on March 16, 2030.