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

Reporting relationship: President, Chief Exec Officer, Director
Issuer ticker: VXRT
Reported as of: 16 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Mar 2026, 21:44:44 UTC
Prior SEC filing: 08 Dec 2025
Next SEC filing: 20 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Edward Berg, Attorney-in-Fact

Key filing fact

Steven Lo filed Form 4 for Vaxart, Inc. (VXRT) on 18 Mar 2026.

Key facts

This page summarizes Steven Lo's Form 4 filing for Vaxart, Inc. (VXRT).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 18 Mar 2026, 21:44.

Change

Previous filing in this sequence was filed on 08 Dec 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001501959 Primary reporting owner

Lo Steven

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

VXRT transaction

Common Stock

Award

Transaction value
Shares: +846,500
Change %: +47%
Price: $0.000000^*
Shares after: 2,634,059
Date: 16 Mar 2026
Ownership: Direct
Footnotes: F1

VXRT holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 100,000
Date: 16 Mar 2026
Ownership: By the Lo Family Trust

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

VXRT transaction Derivative

Stock Option (right to buy)

Award

Transaction value
Shares: +1,543,000
Change %
Price: $0.000000^*
Shares after: 1,543,000
Date: 16 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,543,000
Exercise price: $0.6795
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote 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.

Footnote 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.