Reg FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549   FORM 8-K   CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934   Date of Report (Date of earliest event reported):   August 20, 2025     Vaxart, Inc.     (Exact name of registrant as specified in its charter)       Delaware   001-35285   59-1212264 (State or other jurisdiction of incorporation)   (Commission File Number)   (IRS Employer Identification No.)           170 Harbor Way, Suite 300 , South San Francisco , California   94080 (Address of principal executive offices)   (Zip Code)     Registrant’s telephone number, including area code:   ( 650 ) 550-3500       Not Applicable     (Former name or former address, if changed since last report.)     Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:   ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)   ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)   ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))   ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))   Securities registered pursuant to Section 12(b) of the Act:   Title of each class   Trading symbol   Name of each exchange on which registered Common Stock, $0.0001 par value   VXRT   *   Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).       Emerging Growth Company           ☐   If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐   * The registrant’s common stock is quoted on the OTCQX® Best Market under the symbol “VXRT.”         Item 7.01 Regulation FD Disclosure.   On August 20, 2025, Vaxart, Inc. (the “Company”) held a virtual stockholder fireside chat with its management. A copy of the transcript for the fireside chat is furnished herewith as Exhibit 99.1.   The information in this Item 7.01 and Exhibit 99.1 is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, regardless of any general incorporation language in such filing.         Item 9.01 Financial Statements and Exhibits.   Exhibit No.   Description 99.1   Fireside Chat Transcript, dated August 20, 2025. 104   Cover Page Interactive Data File (embedded within the Inline XBRL document).         SIGNATURES   Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.   Date: August 21, 2025   VAXART, INC.           /s/ Steven Lo     Steven Lo     President and Chief Executive Officer