Vaxart SVP has 3,924 shares withheld for taxes

Vaxart, Inc. SVP and Chief Scientific Officer Sean Tucker reported a routine tax-related share disposition tied to vested RSUs.

Rhea-AI Filing Summary

Vaxart, Inc. SVP and Chief Scientific Officer Sean Tucker reported a routine tax-related share disposition tied to vested RSUs. On March 28, 2026, 3,924 shares of common stock were withheld by the company at $0.65 per share to cover income tax obligations. After this, Tucker held 882,811 common shares directly, plus 51,465 shares in joint tenancy with Frances Chang and 9,060 shares held by his spouse, both reported as indirect ownership.

Insider Trade Summary

Exercise Price or Tax Liability: 3,924 shares

Exercise Price or Tax Liability 3 txns

Insider Tucker Sean

Role SVP, Chief Scientific Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	3,924	$0.65	$3K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 882,811 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 (1)

1. F1. Represents shares that have been withheld by the Issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of RSUs vested as of March 28, 2026.

Key Figures

Tax-withheld shares: 3,924 shares Share value used for withholding: $0.65 per share Direct holdings after transaction: 882,811 shares +3 more

6 metrics

Tax-withheld shares 3,924 shares Withheld to cover income tax on vested RSUs as of March 28, 2026

Share value used for withholding $0.65 per share Value applied to withheld shares on March 28, 2026

Direct holdings after transaction 882,811 shares Common stock held directly by Sean Tucker after March 28, 2026

Joint tenancy holdings 51,465 shares Indirect ownership by joint tenancy with Frances Chang and Sean Tucker

Spouse holdings 9,060 shares Indirect ownership reported as held by spouse

Tax-withholding transactions 1 transaction Tax withholding disposition of shares on March 28, 2026

Key Terms

Restricted Stock Units, net settlement, income tax withholding, joint tenancy, +1 more

5 terms

Restricted Stock Units financial

"in connection with the net settlement of RSUs vested as of March 28, 2026"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

net settlement financial

"in connection with the net settlement of RSUs vested as of March 28, 2026"

income tax withholding financial

"withheld by the Issuer to satisfy its income tax withholding and remittance obligations"

joint tenancy financial

"By joint tenancy with Frances Chang and Sean Tucker"

indirect ownership financial

"nature_of_ownership: By joint tenancy with Frances Chang and Sean Tucker"

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 a tax-related share disposition, where 3,924 Vaxart common shares were withheld by the company at $0.65 per share to satisfy income tax obligations on vested RSUs, rather than an open-market stock sale.

Was the Vaxart (VXRT) Form 4 a stock sale by Sean Tucker?

The filing shows a tax-withholding disposition, not an open-market sale. Vaxart withheld 3,924 shares to cover income tax on Tucker’s vested RSUs, a common administrative step when restricted stock units settle.

How many Vaxart (VXRT) shares does Sean Tucker hold after this filing?

After the transaction, Sean Tucker holds 882,811 Vaxart common shares directly, plus 51,465 shares via joint tenancy with Frances Chang and 9,060 shares through his spouse, both reported as indirect ownership positions.

What price per share was used for the Vaxart (VXRT) tax withholding?

The company used a value of $0.65 per Vaxart share when withholding 3,924 shares to satisfy Sean Tucker’s income tax obligations arising from the net settlement of RSUs that vested on March 28, 2026.

What does the RSU-related footnote in the Vaxart (VXRT) Form 4 explain?

The footnote explains that the 3,924 withheld shares were used to meet Vaxart’s income tax withholding and remittance obligations from the net settlement of RSUs that vested as of March 28, 2026, clarifying the nature of the disposition.

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

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Accepted by SEC EDGAR 03/31/2026 - 04:44 PM EDT 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)
03/28/2026

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	03/28/2026		F		3,924(1)	D	$0.65	882,811	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

Explanation of Responses:

1. Represents shares that have been withheld by the Issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of RSUs vested as of March 28, 2026.

	/s/ Edward Berg, Attorney-in-Fact	03/31/2026
	** 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)