Vaxart (NASDAQ: VXRT) CFO uses 31,395 shares to cover RSU taxes

Rhea-AI Filing Summary

Vaxart, Inc. Chief Financial Officer Jeroen Nicolaas Grasman reported a tax-related share disposition connected to vested restricted stock units. On May 19, 2026, 31,395 shares of common stock were withheld by the company at $0.61 per share to satisfy income tax withholding and remittance obligations. This was a non-market transaction used to settle taxes rather than an open-market sale. After this withholding, Grasman directly held 545,605 shares of Vaxart common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Grasman Jeroen Nicolaas

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	31,395	$0.61	$19K

Holdings After Transaction: Common Stock — 545,605 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares withheld for taxes: 31,395 shares Withholding price per share: $0.61 per share Shares held after transaction: 545,605 shares

3 metrics

Shares withheld for taxes 31,395 shares Withheld on May 19, 2026 to satisfy RSU tax obligations

Withholding price per share $0.61 per share Value used for tax-withholding disposition of common stock

Shares held after transaction 545,605 shares Direct Vaxart common stock holdings by CFO after May 19, 2026

Key Terms

Restricted Stock Units, net settlement, income tax withholding

3 terms

Restricted Stock Units financial

"in connection with the net settlement of RSUs vested as of May 19, 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 May 19, 2026"

income tax withholding financial

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

Form 4 Insider Transactions: What Each Field Means →

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^*

Grasman Jeroen Nicolaas

(Last) (First) (Middle)

C/O VAXART, INC.

310 UTAH AVENUE, SUITE 150

(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)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

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	05/19/2026		F		31,395(1)	D	$0.61	545,605	D

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 May 19, 2026.

	/s/ Edward B. Berg	05/21/2026
	** 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)

FAQ

What insider transaction did Vaxart (VXRT) report for its CFO?

Vaxart reported that CFO Jeroen Nicolaas Grasman had 31,395 shares of common stock withheld on May 19, 2026. The shares covered income tax obligations from vested RSUs, rather than being sold in the open market.

How many Vaxart (VXRT) shares were withheld for the CFO’s taxes?

A total of 31,395 Vaxart common shares were withheld at $0.61 per share. This withholding satisfied income tax and remittance obligations arising from the net settlement of restricted stock units that vested on May 19, 2026.

Did the Vaxart (VXRT) CFO sell shares in the open market?

The filing shows no open-market sale by the Vaxart CFO. Instead, 31,395 shares were withheld by the company to cover income tax obligations on vested RSUs, a routine non-market tax-withholding disposition.

How many Vaxart (VXRT) shares does the CFO hold after this transaction?

Following the May 19, 2026 tax-withholding disposition, CFO Jeroen Nicolaas Grasman directly holds 545,605 Vaxart common shares. This figure reflects his position after 31,395 shares were withheld to satisfy tax obligations on vested RSUs.

What does transaction code F mean in the Vaxart (VXRT) Form 4?

Transaction code F in the Vaxart Form 4 indicates a tax-withholding disposition. In this case, 31,395 shares were delivered back to the issuer to satisfy income tax obligations related to vested restricted stock units on May 19, 2026.