Vaxart CSO granted 410K options and 200K shares

Vaxart, Inc. SVP and Chief Scientific Officer Sean Tucker reported equity awards rather than open-market trades.

Rhea-AI Filing Summary

Vaxart, Inc. SVP and Chief Scientific Officer Sean Tucker reported equity awards rather than open-market trades. He received a stock option covering 410,000 shares of common stock at an exercise price of $0.6795 per share, expiring on March 16, 2036. The option vests 25% on March 16, 2027 and then in 36 equal monthly installments until March 16, 2030.

He also acquired 200,000 shares of common stock at no cash cost in connection with restricted stock units, which are scheduled to vest 25% on each anniversary of the March 16, 2026 vesting commencement date until the fourth anniversary. Following these awards, he directly holds 931,225 common shares, with additional indirect holdings of 51,465 shares in joint tenancy and 9,060 shares held by his spouse.

Insider Trade Summary

Grant/Award: 610,000 shares

Grant/Award 4 txns

Insider Tucker Sean

Role SVP, Chief Scientific Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	410,000	$0.00	$0.00
Grant/Award	Common Stock	200,000	$0.00	$0.00
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Option (right to buy) — 410,000 contracts (Direct); Common Stock — 931,225 shares (Direct); Common Stock — 51,465 shares (Indirect, By joint tenancy with Frances Chang and Sean Tucker); Common Stock — 9,060 shares (Indirect, By Spouse)

Footnotes (2)

1. 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.
2. 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Vaxart (VXRT) executive Sean Tucker report in this Form 4?

Sean Tucker reported equity compensation awards, not market trades. He received a 410,000-share stock option and 200,000 shares tied to restricted stock units, both granted at no cash cost as part of his compensation package.

How large is Sean Tucker’s new stock option grant at Vaxart (VXRT)?

The new stock option covers 410,000 Vaxart common shares. The option has an exercise price of $0.6795 per share, vests over four years starting in 2027, and expires on March 16, 2036, aligning with long-term retention incentives.

How do Sean Tucker’s restricted stock units vest at Vaxart (VXRT)?

The related restricted stock units vest over four years. Twenty-five percent of the shares underlying the award vest on each anniversary of the March 16, 2026 vesting commencement date, so the award becomes fully vested on the fourth anniversary.

What are Sean Tucker’s Vaxart (VXRT) share holdings after these transactions?

After the reported awards, Sean Tucker directly holds 931,225 shares. The filing also shows 51,465 shares held in joint tenancy and 9,060 shares held by his spouse as indirect ownership interests associated with him.

Were Sean Tucker’s Vaxart (VXRT) transactions open-market buys or sells?

The transactions were compensation-related grants, not open-market trades. Both the 410,000-share option and 200,000 common shares were reported with transaction code A, indicating awards or grants with a transaction price per share of $0.0000.

What is the vesting schedule for Sean Tucker’s Vaxart (VXRT) stock option?

The stock option vests gradually over about four years. Twenty-five percent of the option vests on March 16, 2027, the first anniversary of vesting commencement, with the remainder vesting in 36 equal monthly installments through March 16, 2030.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/18/2026 - 07:42 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Tucker Sean

(Last) (First) (Middle)

C/O VAXART, INC.

170 HARBOR WAY, SUITE 300

(Street)

SOUTH SAN FRANCISCO CALIFORNIA 94080

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Vaxart, Inc. [ VXRT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Chief Scientific Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/16/2026		A		200,000(1)	A	$0	931,225	D
Common Stock								51,465	I	By joint tenancy with Frances Chang and Sean Tucker
Common Stock								9,060	I	By Spouse

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$0.6795	03/16/2026		A		410,000		(2)	03/16/2036	Common Stock	410,000	$0	410,000	D

Explanation of Responses:

1. 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.

2. 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.

	/s/ Edward Berg, Attorney-in-Fact	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)