# EDGAR Filing Document

**Accession Number:** 0000072444
**File Stem:** 0001437749-26-014245
**Filing Date:** 2026-4
**Character Count:** 103022
**Document Hash:** 23880d373a71949e6f0df60de403e439
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-26-014245.hdr.sgml**: 20260430

**ACCESSION NUMBER**: 0001437749-26-014245

**CONFORMED SUBMISSION TYPE**: 10-K/A

**PUBLIC DOCUMENT COUNT**: 15

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260430

**DATE AS OF CHANGE**: 20260430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Vaxart, Inc.
- **CENTRAL INDEX KEY:** 0000072444
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 591212264
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 10-K/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35285
- **FILM NUMBER:** 26926464

**BUSINESS ADDRESS:**
- **STREET 1:** 310 UTAH AVENUE, SUITE 150
- **CITY:** SOUTH SAN FRANCISCO
- **STATE:** CA
- **BUSINESS PHONE:** (650) 550-3500

**MAIL ADDRESS:**
- **STREET 1:** 310 UTAH AVENUE, SUITE 150
- **CITY:** SOUTH SAN FRANCISCO
- **STATE:** CA

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Aviragen Therapeutics, Inc.
- **DATE OF NAME CHANGE:** 20160413

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Biota Pharmaceuticals, Inc.
- **DATE OF NAME CHANGE:** 20121113

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NABI BIOPHARMACEUTICALS
- **DATE OF NAME CHANGE:** 20100719

?xml version='1.0' encoding='ASCII'? vxrt20251231_10ka.htm

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**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

Washington, D.C. 20549

**FORM 10-K**

**(Amendment No. 1)**

(Mark One)

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| | |
|:---|:---|
| ☑ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

---

**For the fiscal year ended December 31, 2025**

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

**Commission file number: 001-35285**

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| |
|:---|
| **Vaxart, Inc.** |
| (Exact Name of Registrant as Specified in its Charter) |

---

---

| | |
|:---|:---|
| **Delaware** | **59-1212264** |
| (State or other jurisdiction of incorporation or organization) | (IRS Employer Identification No.) |

---

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| | |
|:---|:---|
| **310 Utah Avenue, Suite 150**<br> **South San Francisco, CA 94080** | **(650) 550-3500** |
| (Address of principal executive offices, including zip code) | (Registrant's telephone number, including area code) |

---

**Securities registered pursuant to Section 12(b) of the Act:**

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| | |
|:---|:---|
| Title of each class | Trading symbol |
| **Common Stock, $0.0001 par value** | **VXRT**<br> **\*** |

---

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No ☑

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☑

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☑ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☑ No ☐

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Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

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| | |
|:---|:---|
| Large accelerated filer ☐ | Accelerated filer ☑ |
| Non-accelerated filer ☐ | Smaller reporting company ☑ |
|  | Emerging growth company ☐ |

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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. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☑

The aggregate market value of the Registrant's common stock held by non-affiliates of the Registrant as of the last business day of the Registrant's most recently completed second fiscal quarter, June 30, 2025, based on the last reported sales price of the Registrant's common stock of $0.45 per share, was $102,712,906. As of March 6, 2026, the registrant had a total of 240,634,372 shares of common stock, $0.0001 par value, outstanding.

\* The registrant's common stock trades exclusively on the OTCQX® Best Market under the symbol "VXRT."

**DOCUMENTS INCORPORATED BY REFERENCE**

None.

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**EXPLANATORY NOTE**

Vaxart, Inc. (the "Company," "we," "us," or "our") previously filed its Annual Report on Form 10-K for the year ended December 31, 2025 (the "Original Form 10-K") with the Securities and Exchange Commission (the "SEC") on March 13, 2026. In accordance with General Instruction G(3) of Form 10-K, this Amendment No. 1 to the Original Form 10-K (this "Amendment") is being filed solely for the purpose of filing the information required by Part III of Form 10-K.

Pursuant to the rules of the SEC, Part IV, Item 15 has also been amended to contain the currently dated certification from the Company's principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. The certification of the Company's principal executive officer and principal financial officer are attached to this Amendment as Exhibit 31.1 and Exhibit 31.2, respectively. Because no financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certification have been omitted. Additionally, we are not including a currently dated certification under Section 906 of the Sarbanes-Oxley Act of 2002 as no financial statements are being filed with this Amendment.

This Amendment does not amend any other information set forth in our Annual Report and we have not updated disclosures included therein to reflect any subsequent events. This Amendment should be read in conjunction with our Annual Report and with our filings with the SEC subsequent to our Annual Report.

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**TABLE OF CONTENTS**

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| | | |
|:---|:---|:---|
|  |  | **Page** |
| [**<u>PART III</u>**](#part_three) | [**<u>PART III</u>**](#part_three) |  |
| ITEM 10. | [Directors, Executive Officers and Corporate Governance](#item10) | [1](#item10) |
| ITEM 11. | [Executive Compensation](#item11) | [12](#item11) |
| ITEM 12. | [Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters](#item12) | [19](#item12) |
| ITEM 13. | [Certain Relationships and Related Transactions, and Director Independence](#item13) | [20](#item13) |
| ITEM 14. | [Principal Accounting Fees and Services](#item14) | [21](#item14) |
| [**PART IV**](#partiv) | [**PART IV**](#partiv) |  |
| ITEM 15. | [Exhibits and Financial Statement Schedules](#item15) | [22](#item15) |
| [EXHIBIT INDEX](#exhibitindex) |  | [22](#exhibitindex) |
| ITEM 16. | [Form 10-K Summary](#item16) | [22](#item16) |
| [SIGNATURES](#sigs) |  | [23](#sigs) |

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**PART III**

**Item 10. Directors, Executive Officers and Corporate Governance**

**Executive Officers and Directors** 

The following table sets forth information regarding our executive officers and directors as of the date of this annual report.

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| | | |
|:---|:---|:---|
| **Name** | **Age** | **Position(s)** |
| Steven Lo | 59 | President, Chief Executive Officer, Principal Executive Officer, and Director |
| Jeroen Grasman | 56 | Chief Financial Officer, Principal Financial Officer, and Principal Accounting Officer |
| Sean Tucker, Ph.D. | 58 | Senior Vice President and Chief Scientific Officer |
| Edward B. Berg | 62 | Senior Vice President and General Counsel |
| James Cummings, M.D. | 60 | Chief Medical Officer |
| Kevin P. Finney | 58 | Director |
| Elaine J. Heron, Ph.D. | 78 | Director |
| W. Mark Watson | 75 | Director |
| David Wheadon, M.D. | 68 | Director |
| James B. Breitmeyer, M.D., Ph.D. | 72 | Director |

---

The following is biographical information regarding our executive officers and directors.

***Steven Lo*** has served as our President, Chief Executive Officer, Principal Executive Officer, and a member of the board of directors since March 2024. He has over 30 years of experience in healthcare, biotechnology, and pharmaceutical industries, including over 15 years of C-level experience in publicly traded biotech companies. Prior to joining the Company, Mr. Lo served as Chief Executive Officer and a member of the board of directors of Valitor, Inc., a private biotech company, from August 2022 to March 2024. From October 2019 to August 2022, Mr. Lo was the President, Chief Executive Officer, and member of the board of directors of Zosano Pharma Corporation ("Zosano"), a clinical-stage biopharmaceutical company. From September 2015 to October 2019, he was the Chief Commercial Officer at Puma Biotechnology, Inc., a biopharmaceutical company with a focus on the development and commercialization of innovative products to enhance cancer care. At that company, he built and led business development and the worldwide commercialization of the company's first product. Prior to that, he was Chief Commercial Officer of Corcept Therapeutics Incorporated, where he established the commercial organization to launch the company's first product. Earlier in his career, he spent 13 years at Genentech, Inc., a member of Roche Group, in a variety of leadership roles of increasing responsibility in commercial and drug development. He worked in numerous areas, including oncology, endocrinology and other specialty therapeutics. Mr. Lo started his career in the pharmaceutical industry at AstraZeneca after holding positions in finance and operations at Kaiser Permanente. Mr. Lo obtained a Master of Health Administration from the University of Southern California and a B.S. in Microbiology from the University of California, Davis. We believe Mr. Lo is qualified to serve on the board of directors because of his extensive experience within the life sciences industry, including his experience leading, advising, and working with biotechnology companies.

***Jeroen Grasman*** has served as our Chief Financial Officer since May 2025. From August 2021 to May 2025, Mr. Grasman served as Chief Financial Officer at AltruBio, a clinical-stage private biotech company. During his tenure at AltruBio, Mr. Grasman led a number of successful financings and helped scale the company for global clinical studies. From 2018 to 2021, Mr. Grasman served as Vice President, Finance and Operations at PACT Pharma, a clinical-stage private biotech company, where he was responsible for pre-IPO readiness, capital formation and scaling the Finance, Information Technology and Procurement organizations. Prior to joining PACT Pharma, Mr. Grasman served as Vice President, Finance at Intarcia Therapeutics and also spent more than 10 years at Genentech, holding financial leadership positions of increasing responsibility and geographical reach and building broad operational finance expertise across strategic planning, business development, clinical development, and manufacturing functions. Mr. Grasman earned a MSc in Applied Mathematics from Groningen University in the Netherlands and an MBA from Harvard Business School.

***Sean Tucker, Ph.D.*** has served as our Chief Scientific Officer since February 2010, and as Senior Vice President since March 2021. From March 2004 to February 2010, Dr. Tucker served as our Vice President of Research and Director of Immunology. Prior to these roles, Dr. Tucker held numerous scientific and engineering roles at various biotechnology companies. Dr. Tucker received a B.S. in chemical engineering from the University of Washington, an M.S. in chemical engineering from the University of California, Berkeley and a Ph.D. in immunology from the University of Washington.

***Edward B. Berg*** has served as our Senior Vice President and General Counsel since February 2022. Mr. Berg has served in senior legal positions at prominent healthcare companies for most of his more than 30-year career and has represented Fortune 500 and mid-cap companies in biotechnology, pharmaceuticals and life sciences. Prior to Vaxart, he served as VP, Deputy General Counsel for BioMarin Pharmaceutical Inc. from July 2018 to January 2022. Mr. Berg previously served as VP Legal and the head attorney supporting Novartis AG's biosimilar / generic subsidiary, Sandoz US, from June 2016 to June 2018. Mr. Berg's previous roles include Deputy General Counsel, Pharmaceutical Operations for Sanofi-Aventis U.S. LLC and Sanofi NA Pharmaceuticals, and Senior Corporate Counsel, Research & Development at Bristol-Myers Squibb, Inc. He began his career in healthcare as Senior Attorney / Associate Counsel for Merck & Co, Inc. Mr. Berg received a B.A. from Washington University in economics and political science and a law degree from the University of Pennsylvania Law School.

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***James Cummings, M.D.*** has served as our Chief Medical Officer since August 2021. Preceding his role at Vaxart, Dr. Cummings served as President of ICON Government and Public Health Solutions, Inc., a global clinical research organization, from January 2018 until September 2021, providing clinical trial and functional services to government and commercial customers, in support of global health. Prior to joining ICON, Dr. Cummings served as Vice President of Clinical Development and Translational Medicine at Novavax, Inc. from September 2015 until January 2018. There he led the development programs for all Emerging and Re-Emerging Infectious Diseases to provide a timely, broad response across the spectrum of emerging infectious diseases. Dr. Cummings retired as a Colonel in the U.S. Army after 26 years of service, during which he acquired proven track record in vaccine, drug and diagnostics development, and served as Director of the Department of Defense (DoD) Global Emerging Infectious Diseases Surveillance and Response Systems (DoD GEIS) leading Biosurveillance for the US DoD with laboratories and partners in 71 countries and as consultant to the Army Surgeon General for all medical research and development. A graduate of Georgetown University's School of Medicine, Dr. Cummings trained in Internal Medicine and Infectious Diseases Fellowships at Walter Reed and the National Capital Consortium and has been elected to fellow in the American College of Physicians (FACP), the Infectious Diseases Society of America (FIDSA) and the American Society of Tropical Medicine and Hygiene (FASTMH).

***Kevin P. Finney*** has served as a member of our board of directors since January 2025. Mr. Kevin P. Finney is an experienced biotech executive and director who has held numerous leadership roles in the healthcare industry, leading companies from early stages of development through to commercialization. Since November 2019, Mr. Kevin Finney has served as President, Chief Executive Officer, and Chairman of the board of directors of Autobahn Therapeutics, Inc., a biotechnology company developing a portfolio of neuropsychiatric and neuroimmunologic clinical candidates leveraging its brain-targeting chemistry platform. Previously, Mr. Kevin Finney served as President, Chief Operating Officer, and a director of Abide Therapeutics Inc. through the company's acquisition by H. Lundbeck A/S in 2019. Prior to this, Mr. Kevin Finney founded and served as the Chief Operating Officer of Zavante Therapeutics, Inc. through the company's acquisition by Nabriva Therapeutics PLC in 2018. Mr. Kevin Finney previously spent a decade as head of world-wide corporate development at Allergan, Inc., an international specialty pharmaceutical company operating in more than 100 countries worldwide, through the company's merger with Actavis in 2015. Prior to Allergan, Mr. Kevin Finney held executive management roles at Prometheus Laboratories, Inc. (now a part of Nestle Health Science), Amylin Pharmaceuticals, Inc. (now a part of Bristol-Myers Squibb) and the Parke-Davis division of Warner-Lambert (now a part of Pfizer). Since January 2016, Mr. Kevin Finney has also served on the board of directors of Eirion Therapeutics, Inc. Mr. Kevin Finney previously served as Executive Chairman of the board of directors of Elsie Biotechnologies (now a part of GSK), a non-executive director of Anterios Inc. (now a part of Allergan), and Executive Chairman of the board of directors of Taris Biomedical (now a part of Johnson & Johnson). Mr. Kevin Finney has a B.A. in Exercise Physiology from California State University, Long Beach, and an MBA from Pepperdine Graziadio Business School. We believe Mr. Kevin Finney is qualified to serve on the board of directors because of his extensive experience within the life sciences industry, including as an executive and a director in the biotechnology industry.

***Elaine J. Heron, Ph.D.*** has served as a member of our board of directors since August 2022. Dr. Heron has served on the board of directors of BioMarin Pharmaceutical Inc. (Nasdaq: BMRN) since July 2002 and until May 2025 and on the board of directors of Palvella Therapeutics, Inc. (Nasdaq: PVLA) since December 2024. From February 2009 to October 2015, Dr. Heron served as Chair and CEO of Amplyx Pharmaceuticals, Inc., a private drug development company acquired by Pfizer, Inc. in April 2021. She currently serves on the boards of BlueWhale Bio, Inc., a private early stage therapeutics company, Enumera Molecular, Inc., a private diagnostics company, and Watershed Medical, Inc., a private early-stage therapeutics company. She previously served on the board of Visgenx, Inc., a private early-stage therapeutics company, until her departure in May 2026. From July 2001 to October 2008, Dr. Heron was Chair and CEO of Labcyte Inc., a private biotechnology company. Before joining Labcyte Inc., she spent six years in positions of increasing responsibility at the Applied Biosystems Group of Applera Corporation, a biotechnology company, including the position of General Manager and Vice President of Sales and Marketing. Dr. Heron earned a B.S. in chemistry with highest distinction and a Ph.D. in analytical biochemistry from Purdue University and an M.B.A. from Pepperdine University. We believe Dr. Heron is qualified to serve on the board of directors because of her extensive experience in life science sales and marketing, finance and accounting, corporate governance matters, and research and development.

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***W. Mark Watson*** has served as a member of our board of directors since August 2022 and as lead director since September 2025. Mr. Watson is a Certified Public Accountant with over 40 years of experience in public accounting and auditing, having spent his entire career from January 1973 to June 2013 at Deloitte Touche Tohmatsu and its predecessor, including as Central Florida Marketplace Leader. He has served as lead audit partner and lead client service partner on public companies ranging from middle market firms to Fortune 500 enterprises. Mr. Watson also served as Chairman of the Board of Directors and Chairman of the Audit Committee of Inhibitor Therapeutics, Inc. and as a director and member of the Audit Committee of Sykes Enterprises, Inc and BioDelivery Sciences International, Inc. Mr. Watson served as a trustee of Tekla World Healthcare Fund (THW), Tekla Healthcare Opportunities Fund (THQ), Tekla Healthcare Investors (HQH), and Tekla Life Sciences Investors (HQL) until the Fall of 2023. Mr. Watson also serves on the Board of Moffitt Cancer Center and as Chair of its Joint Enterprise Risk, Audit and Compliance Committee. Mr. Watson is a member of the American Institute of Certified Public Accountants and the Florida Institute of Certified Public Accountants. He received his undergraduate degree in Accounting from Marquette University. We believe Mr. Watson is qualified to serve on the board of directors because of his extensive experience as a Certified Public Accountant focused on health and life sciences and his other professional and civic engagements.

***David Wheadon, M.D.*** has served as a member of our board of directors since April 2021. He served as Senior Vice President, Global Regulatory Affairs, Patient Safety and Quality Assurance for AstraZeneca Pharmaceuticals from 2014 to 2019 and as Executive Vice President, Research and Advocacy at the Juvenile Diabetes Research Foundation from 2013 to 2014. From 2009 to 2013, Dr. Wheadon served as Senior Vice President, Scientific and Regulatory Affairs and as a member of the Management Committee of the Pharmaceutical Research and Manufacturers of America ("PhRMA"). Prior to his joining PhRMA, Dr. Wheadon held senior regulatory and clinical development leader roles at Abbott Laboratories and GlaxoSmithKline plc. Dr. Wheadon began his career as a clinical research physician in neuroscience at Eli Lilly & Company. He is a non-executive director of Sotera Health, Inc., Indivior, PLC, ConnectiveRx, and Seaport Therapeutics. He also serves as a member of the Board of Trustees of Mount Sinai Health System. He formerly served on the board of directors of Assertio Holdings, Inc. (formerly Assertio Therapeutics, Inc.), Karuna Therapeutics, Inc. and Chemocentryx, Inc. Dr. Wheadon holds an A.B. from Harvard College and an M.D. from Johns Hopkins University School of Medicine. He completed his fellowship training in Psychiatry at the Tufts, New England Medical Center. We believe Dr. Wheadon is qualified to serve as a member of the Board due to his extensive experience as an executive in the pharmaceutical industry and expertise in regulatory affairs, government policy and clinical strategy.

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***James B. Breitmeyer, M.D., Ph.D.*** currently serves as the Chief Executive Officer and director of Altay Therapeutics, Inc. and as Operating Partner of SOLVE FSHD, a venture philanthropy group, since February 2026 and September 2025, respectively. Previously, Dr. Breitmeyer served as President and Chief Executive Officer of Oncternal Therapeutics, Inc. from February 2016 to June 2025. Dr. Breitmeyer is a veteran biotech executive with experience successfully starting and growing biotechnology organizations. He has been responsible for the development and implementation of operational and drug development strategies, as well as supervising and managing both large organizations and emerging biotechnology companies. Dr. Breitmeyer served as President of Bavarian Nordic, Inc. and Executive Vice President of Bavarian Nordic A/S, a multinational corporation headquartered in Denmark, from February 2013 to July 2015 where he oversaw business operations and development strategy both for Bavarian Nordic, Inc. and Bavarian Nordic A/S. He served as a director of Zogenix, Inc., then a public pharmaceutical company, from March 2014 until it was acquired by UCB S.A. in March 2022 and was acting Chief Medical Officer of Zogenix from August 2012 to February 2013 where he was responsible for clinical development and regulatory strategy. He previously served as the Executive Vice President of Development and Chief Medical Officer of Cadence Pharmaceuticals Inc., a public pharmaceutical company, from August 2006 to August 2012, and the Chief Medical Officer of Applied Molecular Evolution Inc., a wholly owned subsidiary of Eli Lilly and Co., a global pharmaceutical company, from December 2001 to August 2006. Dr. Breitmeyer was also the founder, President and Chief Executive Officer of the Harvard Clinical Research Institute, and Chief Medical Officer and Head of Research & Development for North America at Serono Laboratories Inc., an international biopharmaceutical company. Dr. Breitmeyer served as a founding collaborator and scientific advisor to Immunogen Inc., a biotechnology company, and held clinical and teaching positions at the Dana Farber Cancer Institute and Harvard Medical School. Dr. Breitmeyer previously served as a director of Otonomy, Inc. Dr. Breitmeyer earned his B.A. in Chemistry from the University of California, Santa Cruz and his M.D. and Ph.D. from Washington University School of Medicine and is Board Certified in Internal Medicine and Oncology. He holds an active California medical license. We believe that Dr. Breitmeyer's perspective and experience as Altay's CEO and director, as well as his depth of operating and senior management experience in the pharmaceutical industry in both private and public organizations and educational background, provide him with the qualifications and abilities to serve as a director.

**Information Regarding the Board of Directors and Corporate Governance**

***Family Relationships***

There are no family relationships among the members of the board of directors and our executive officers.

***Independence of the Board of Directors***

As required under The Nasdaq Stock Market ("*Nasdaq*") listing standards, a majority of the members of a listed company's board of directors must qualify as "independent," as affirmatively determined by the board of directors. The board of directors consults with our counsel to ensure that its determinations are consistent with relevant securities and other laws and regulations regarding the definition of "independent," including those set forth in pertinent listing standards of Nasdaq, as in effect from time to time.

Consistent with these considerations, after review of all relevant identified transactions or relationships between each director, or any of his or her family members, and us, our senior management and our independent auditors, the board of directors has affirmatively determined that all of our current directors, other than Mr. Lo due to his positions as our current President and Chief Executive Officer, are independent within the meaning of the applicable Nasdaq listing standards. In making this determination, the board of directors found that none of the independent nominees for director had a material or other disqualifying relationship with Vaxart.

***Board Leadership Structure***

We currently have separate individuals serving in the roles of Lead Director of the board of directors and Chief Executive Officer in recognition of the differences between the two roles. The board of directors believes that the decision as to whether the positions of Lead Director and Chief Executive Officer should be combined or separated, and whether an executive or an independent director should serve as Lead Director if the roles are split, should be based upon the particular circumstances facing the Company. The board of directors believes that it is important to retain the flexibility to allocate the responsibilities of the offices of Lead Director of the board of directors and Chief Executive Officer in any manner that it determines to be in the best interests of the Company and its stockholders. Our Chief Executive Officer is responsible for setting the strategic direction for the Company and the day-to-day leadership of the Company, while the Lead Director of the board of directors provides guidance to the Chief Executive Officer, prepares the agendas for board meetings, determines materials to be distributed to the board of directors, and presides over the meetings of the board of directors. We believe this balance of shared leadership between the two positions is appropriate and is a strength for the Company.

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As discussed above, except for our Chief Executive Officer, our board of directors is comprised of independent directors. The active involvement of these independent directors, combined with the qualifications and significant responsibilities of our Chief Executive Officer, provide balance in the board of directors and promote strong, independent oversight of our management and affairs.

***Role of the Board of Directors in Risk Oversight***

The board of directors has an active role, as a whole and also at the committee level, in overseeing management of Vaxart's risks. The board of directors regularly reviews information regarding our credit, liquidity, and operations, as well as the risks associated with each. The Audit Committee's charter mandates the Audit Committee to review and discuss with management and our independent registered public accounting firm, as appropriate, our major financial risk exposures and the steps taken by management to monitor and control these exposures. In addition, the Audit Committee discusses major financial, information security (including cybersecurity) and data privacy risk exposures and the steps management has taken to monitor and control such exposures. The Compensation Committee is responsible for overseeing the management of risks relating to our executive compensation plans and arrangements. The Nominating and Governance Committee manages risks associated with the independence of the board of directors and potential conflicts of interest. While each committee is responsible for evaluating certain risks and overseeing the management of such risks, the entire board of directors is regularly informed through committee reports about such risks.

***Meetings of the Board of Directors***

Our board of directors met eleven times during 2025. Each member of the board of directors attended 75% or more of the aggregate number of meetings of the board of directors and of the committees on which the member served, held during the portion of 2025 for which the member was a director or committee member.

As required under applicable Nasdaq listing standards, during the fiscal year ended December 31, 2025, the Vaxart independent directors met at least twice in regularly scheduled executive sessions at which only independent directors were present. W, Mark Watson, the Lead Director, presided over the executive sessions.

**Information Regarding Committees of the Board of Directors**

The board of directors has an Audit Committee, a Compensation Committee, and a Nominating and Governance Committee. The Science and Technology Committee was disbanded by the Company on September 30, 2025. The board of directors has adopted a written charter for each committee that is available to stockholders on the Investors section of our website at *http://www.vaxart.com*.

The following table provides membership and meeting information for each of the committees of the board of directors during 2025:

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| | | | |
|:---|:---|:---|:---|
| **Name** | **Audit** | **Compensation** | **Nominating**<br> **and**<br> **Governance** |
| Dr. Michael J. Finney<sup>(1)</sup> |  |  |  |
| Elaine J. Heron, Ph.D. | √ | √ | √\* |
| Steven Lo |  |  |  |
| W. Mark Watson | √\* | √ |  |
| David Wheadon, M.D. |  | √\* | √ |
| Robert A. Yedid<sup>(2)</sup> |  |  |  |
| Kevin P. Finney<sup>(3)</sup> | √ |  | √ |

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\* Committee Chair

(1) Dr. Michael J. Finney retired resigned from the Board and committees in September 2025.

(2) Robert A. Yedid resigned from the Board and committees in January 2025.

(3) Kevin P. Finney was appointed to the Board and associated committees in January 2025.

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***Committees of the Board of Directors***

Below is a description of the Audit Committee, Compensation Committee, and Nominating and Governance Committee of the board of directors. Each of the committees has authority to engage legal counsel or other experts or consultants, as it deems appropriate to carry out its responsibilities.

*Audit Committee*

The members of our Audit Committee are Mr. Kevin P. Finney, Dr. Heron, and Mr. Watson. Mr. Watson serves as Chair of the Audit Committee. The board of directors reviews the Nasdaq listing standards definition of independence for Audit Committee members on an annual basis and has determined that all members of the Audit Committee are independent (as independence is currently defined in Rule 5605(c)(2)(A)(i) and (ii) of the Nasdaq listing standards). The Audit Committee held four meetings and acted through written consent in lieu of holding a meeting two times during 2025.

The board of directors determined that Mr. Watson qualifies as an "audit committee financial expert," as defined in applicable SEC rules. The board of directors made a qualitative assessment of Mr. Watson's level of knowledge and experience based on a number of factors, including Mr. Watson's over 40 years of experience in public accounting and auditing and status as a Certified Public Accountant.

The primary purpose of the Audit Committee is to discharge the responsibilities of the board of directors with respect to our accounting, financial, and other reporting and internal control practices and to oversee its independent registered accounting firm. Specific responsibilities of the Audit Committee include:

● selecting a qualified firm to serve as the independent registered public accounting firm to audit the Company's financial statements;

● helping to ensure the independence and performance of the independent registered public accounting firm;

● discussing the scope and results of the audit with the independent registered public accounting firm, and reviewing, with management and the independent auditors, the Company's interim and year-end operating results;

● developing procedures for employees to anonymously submit concerns about questionable accounting, ethical, and auditing matters;

● reviewing policies on risk assessment and risk management;

● reviewing with management the type and presentation of the Company's environmental, social and governance ("*ESG*") disclosures and the adequacy and effectiveness of applicable internal controls related to such disclosures;

● reviewing related party transactions in accordance with the Company's policies and procedures with respect to related party transactions;

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● reviewing cyber risk on a quarterly basis and reporting to the board of directors;

● obtaining and reviewing a report by the independent registered public accounting firm at least annually, that describes the independent auditor's internal quality control procedures, any material issues with such procedures, and any steps taken to deal with such issues when required by applicable law, as well as all relationships between the independent auditor and the Company or any of its subsidiaries; and

● approving (or, as permitted, pre-approving) all audit and all permissible non-audit services, other than de minimis non-audit services, to be performed by the independent registered public accounting firm.

*Report of the Audit Committee of the Board of Directors*

The Audit Committee reviewed and discussed the audited financial statements for the year ended December 31, 2025 with Vaxart's management. The Audit Committee discussed with Vaxart's independent registered public accounting firm the matters required to be discussed by the applicable requirements of the Public Company Accounting Oversight Board ("*PCAOB*") and the SEC. The Audit Committee also received the written disclosures and the letter from Vaxart's independent registered public accounting firm required by applicable requirements of the PCAOB regarding the independent accountants' communications with the Audit Committee concerning independence, and has discussed with the independent registered public accounting firm the accounting firm's independence. Based on the foregoing, the Audit Committee recommended to the board of directors that the audited financial statements be included in Vaxart's Annual Report on Form 10-K for the year ended December 31, 2025.

Respectfully submitted by the members of the Audit Committee:

W. Mark Watson (Lead Director)

Kevin P. Finney

Elaine J. Heron, Ph.D.

*The material in this report is not* "*soliciting material,*" *is not deemed* "*filed*" *with the Commission and is not to be incorporated by reference in any filing of Vaxart under the Securities Act of 1933, as amended (the* "*Securities Act*"*) or the Securities Exchange Act of 1934, as amended (the* "*Exchange Act*"*), whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.*

*Compensation Committee*

The members of our Compensation Committee are Dr. Heron, Mr. Watson, and Dr. Wheadon. Dr. Wheadon serves as Chair of the Compensation Committee. All members of the Compensation Committee are independent (as independence is currently defined in Rule 5605(d)(2) of the Nasdaq listing standards). The Compensation Committee held five meetings and acted through written consent in lieu of holding a meeting two times during 2025.

The primary purpose of the Compensation Committee is to discharge the responsibilities of the board of directors to oversee our compensation policies, plans and programs and to review and determine the compensation to be paid to our executive officers, directors and other senior management, as appropriate. Specific responsibilities of the Compensation Committee include:

● reviewing and approving, or recommending that our board of directors approve, the compensation of our executive officers;

● reviewing and recommending to our board of directors the compensation of our directors;

● reviewing and approving, or recommending that our board of directors approve, the terms of compensatory arrangements with our executive officers;

● reviewing and administering our stock and equity compensation, incentive compensation, and other employee benefit plans;

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● periodically reviewing, and consulting with and advising management on, the Company's strategies and policies related to human capital management, including talent acquisition, development and retention, internal pay equity, diversity and inclusion and corporate culture;

● overseeing the succession process for leadership talent for the Company, including for the CEO and selected senior executives;

● selecting independent compensation consultants and assessing whether there are any conflicts of interest with any of the committee's compensation advisers;

● reviewing and approving, or recommending that our board of directors approve, incentive compensation and equity plans, severance agreements, change-of-control protections and any other compensatory arrangements for our executive officers and other senior management, as appropriate; and

● reviewing and establishing general policies relating to compensation and benefits of our employees and reviewing our overall compensation philosophy.

*<u>Compensation Committee Processes and Procedures</u>*

Typically, the Compensation Committee will meet at least twice annually and with greater frequency if necessary. The agenda for each meeting is usually developed by the Chair of the Compensation Committee, in consultation with the Chief Executive Officer. The Compensation Committee meets regularly in executive session. However, from time to time, various members of management and other employees as well as outside advisors or consultants may be invited by the Compensation Committee to make presentations, to provide financial or other background information or advice, or to otherwise participate in Compensation Committee meetings. Our Chief Executive Officer may not participate in, or be present during, any deliberations or determinations of the Compensation Committee regarding his or her compensation. The charter of the Compensation Committee grants the Compensation Committee full access to all books, records, facilities, and personnel of the Company.

The Compensation Committee charter authorizes the Compensation Committee to delegate authority to one or more members of the Compensation Committee or to one or more executive officers of the Company, and to form and delegate authority to one or more subcommittees and to one or more committees of executive officers of the Company for any purpose that the Compensation Committee deems appropriate, except that the Compensation Committee may not delegate authority to approve compensation for the Company's Chief Executive Officer or other officers of the Company subject to the reporting requirements under Section 16(a) of the Exchange Act, unless such delegation is to a subcommittee consisting of at least two members of the Compensation Committee.

In addition, under its charter, the Compensation Committee has the authority to obtain, at the expense of the Company, advice and assistance from compensation consultants and internal and external legal, accounting or other advisors and other external resources that the Compensation Committee considers necessary or appropriate in the performance of its duties. During 2025, the Compensation Committee approved the continued engagement of Aon Consulting, Inc. ("*Aon*") to provide advisory services on various aspects of the Company's compensation practices. In fiscal year 2025, the aggregate fees paid to Aon for all services totaled $201,046, of which $153,149 has been expended for insurance brokerage-related services performed at the recommendation of management.

The Compensation Committee has direct responsibility for the oversight of the work of any consultants or advisers engaged for the purpose of advising the Compensation Committee. In particular, the Compensation Committee has the sole authority to retain, in its sole discretion, compensation consultants to assist in its evaluation of executive and director compensation, including the authority to approve the consultant's reasonable fees and other retention terms. Under its charter, the Compensation Committee may select, or receive advice from, a compensation consultant, legal counsel or other adviser to the Compensation Committee, other than in-house legal counsel and certain other types of advisers, only after taking into consideration six factors, prescribed by the SEC and Nasdaq, that bear upon the adviser's independence; however, there is no requirement that any adviser be independent.

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*Nominating and Governance Committee*

The members of our Nominating and Governance Committee are Mr. Kevin P. Finney, Dr. Heron, and Dr. Wheadon. Dr. Heron serves as Chair of the Nominating and Governance Committee. Each of the members of the Nominating and Governance Committee are independent (as independence is currently defined in Rule 5605(a)(2) of the Nasdaq listing standards). The Nominating and Governance Committee held four meetings and acted by written consent in lieu of holding meetings one time during 2025. Specific responsibilities of the Nominating and Governance Committee include:

● identifying, evaluating and selecting, or recommending that the board of directors approve, nominees for election to the board of directors;

● overseeing the annual evaluation of the effectiveness and performance of the board of directors, and periodically conducting an individual evaluation of each director;

● considering and making recommendations to the board of directors regarding the composition of the committees of the board of directors;

● reviewing developments in corporate governance practices;

● evaluating the adequacy of corporate governance practices and reporting;

● reviewing succession plans for key executive officers;

● developing and making recommendations to the board of directors regarding corporate governance guidelines and matters;

● assisting in overseeing and monitoring the Company's approach and strategy relating to environmental, legal and social responsibility, diversity, and other corporate citizenship and sustainability matters; and

● overseeing an annual evaluation of the board of directors' performance.

The Nominating and Governance Committee believes that candidates for director should have certain minimum qualifications, including the ability to read and understand basic financial statements, being over 21 years of age and having the highest personal integrity and ethics. The Nominating and Governance Committee also intends to consider such factors as possessing relevant expertise upon which to be able to offer advice and guidance to management, having sufficient time to devote to the affairs of the Company, demonstrated excellence in his or her field, having the ability to exercise sound business judgment and having the commitment to rigorously represent the long-term interests of our stockholders. However, the Nominating and Governance Committee retains the right to modify these qualifications from time to time. Candidates for director nominees are reviewed in the context of the current composition of the board of directors, the operating requirements of the Company and the long-term interests of stockholders. In conducting this assessment, the Nominating and Governance Committee typically considers diversity, age, skills, and such other factors as it deems appropriate, given the current needs of the board and the Company, to maintain a balance of knowledge, experience, and capability.

In the case of incumbent directors whose terms of office are set to expire, the Nominating and Governance Committee reviews these directors' overall service to Vaxart during their terms, including the number of meetings attended, level of participation, quality of performance and any other relationships and transactions that might impair the directors' independence. The Nominating and Governance Committee also takes into account the results of the board of directors' self-evaluation, conducted annually on a group and individual basis. In the case of new director candidates, the Nominating and Governance Committee also determines whether the nominee is independent for Nasdaq purposes, which determination is based upon applicable Nasdaq listing standards, applicable SEC rules and regulations, and the advice of counsel, if necessary. The Nominating and Governance Committee then uses its network of contacts to compile a list of potential candidates, but may also engage, if it deems appropriate, a professional search firm to identify director candidates. The Nominating and Governance Committee conducts any appropriate and necessary inquiries into the backgrounds and qualifications of possible candidates after considering the function and needs of the board of directors. The Nominating and Governance Committee meets to discuss and consider the candidates' qualifications and then selects a nominee for recommendation to the board of directors by majority vote.

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The Nominating and Governance Committee will consider director candidates recommended by stockholders. The Nominating and Governance Committee does not intend to alter the manner in which it evaluates candidates, including the minimum criteria set forth above, based on whether or not the candidate was recommended by a stockholder. Stockholders who wish to recommend individuals for consideration by the Nominating and Governance Committee to become nominees for election to the board of directors may do so by delivering a written recommendation to the Nominating and Governance Committee at the following address: 310 Utah Avenue, Suite 150, South San Francisco, CA 94080. Submissions must include the full name of the proposed nominee, a description of the proposed nominee's business experience for at least the previous five years, complete biographical information, a description of the proposed nominee's qualifications as a director, and a representation that the nominating stockholder is a beneficial or record holder of Vaxart's stock and has been a holder for at least one year. Any such submission must be accompanied by the written consent of the proposed nominee to be named as a nominee and to serve as a director if elected.

**Stockholder Communications with the Board of Directors**

Communications addressed to the board of directors will be reviewed by one or more Vaxart executive officers, who will determine whether the communication should be presented to the board of directors. The purpose of this screening is to allow the board of directors to avoid having to consider irrelevant or inappropriate communications (such as advertisements, solicitations, and hostile communications).

Communications to the board of directors must be sent in writing in care of our Corporate Secretary to our headquarters at 310 Utah Avenue, Suite 150, South San Francisco, CA 94080 or delivered via e-mail to ir@vaxart.com. All communications directed to the Audit Committee in accordance with our whistleblower policy that relate to questionable accounting or auditing matters involving Vaxart will be promptly and directly forwarded to the Audit Committee.

**Code of Ethics**

We have adopted a Code of Conduct that applies to all officers, directors, and employees. The Code of Conduct is available on the Investors section of our website at *http://www.vaxart.com*. If we make any substantive amendments to the Code of Conduct or grant any waiver from a provision of the Code of Conduct to any executive officer or director, we will promptly disclose the nature of the amendment or waiver on our website.

**Anti-Hedging/Pledging Policy**

Our insider trading policy prohibits our directors, officers, and other employees, as well as consultants, contractors, advisors, and agents of the Company, from engaging in speculative trading activities, including hedging transactions (such as zero-cost collars and forward sale contracts) or other inherently speculative transactions with respect to our securities, and from pledging our securities as collateral for any loans.

**Insider Trading Policies and Procedures**

Our insider trading policy also prohibits such persons from purchasing or selling our securities while in possession of material nonpublic information and contains restrictions relating to pre-clearance procedures and blackout periods. Directors and employees are permitted to enter into trading plans that are intended to comply with the requirements of Rule 10b5-1 of the Exchange Act. The insider trading policy is reasonably designed to promote compliance with insider trading laws, rules and regulations, and applicable listing standards.

While we have not adopted a formal policy governing transactions by the Company in its securities, we will not engage in transactions in Company securities, or adopt any securities repurchase plans, while in possession of material non-public information relating to the Company or its securities other than in compliance with applicable law, subject to the policies and procedures adopted by the Company.

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**Compensation Recovery Policy**

We adopted a Compensation Recovery Policy in October 2023, which applies to certain incentive compensation received by an executive officer on or after October 2, 2023 and which complies with the applicable requirements for compensation recovery (or "clawback") policies adopted by the SEC and The Nasdaq Stock Market. Pursuant to the policy, if the Company is required to prepare an accounting restatement of its financial statements due to the Company's material noncompliance with any financial reporting requirement under the securities laws, including any required accounting restatement to correct an error in previously issued financial statements that is material to the previously issued financial statements, or that would result in a material misstatement if the error were corrected in the current period or left uncorrected in the current period, the Compensation Committee will cause the Company to recovery reasonably promptly, subject to certain exceptions, any erroneously awarded incentive compensation received by any covered executive officer during the three completed fiscal years immediately preceding the date on which the Company is required to prepare such an accounting restatement. Covered executive officers include both current and former executive officers.

**Corporate Governance Guidelines**

The board of directors has documented our governance practices by adopting Corporate Governance Principles to assure that the board of directors will have the necessary authority and practices in place to review and evaluate our business operations as needed and to make decisions that are independent of our management. The Corporate Governance Principles are also intended to align the interests of directors and management with those of our stockholders. The Corporate Governance Principles set forth the practices the board of directors intends to follow with respect to board composition and selection, board meetings and involvement of senior management, chief executive officer performance evaluation and succession planning, and board committees and compensation. The Corporate Governance Principles, as well as the charters for each committee of the board of directors, may be viewed on the Investors section of our website at <u>*http://www.vaxart.com*</u>.

**Section 16(a) Beneficial Ownership Reporting Compliance**

Section 16(a) of the Exchange Act requires that our directors and executive officers, and persons who own more than ten percent of a registered class of our equity securities, to file with the SEC initial reports of ownership and reports of changes in ownership of common stock and other equity securities of Vaxart. Officers, directors and greater than ten percent stockholders are required by SEC regulation to furnish us with copies of all Section 16(a) forms they file.

To our knowledge, based solely on a review of the copies of such reports furnished to us and written representations that no other reports were required, during the year ended December 31, 2025, all Section 16(a) filing requirements applicable to our officers, directors, and greater than ten percent beneficial owners were complied with, except that, each of Kevin Finney and W. Mark Watson filed one late Form 4 with respect to one transaction for each due to administrative oversight.

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**Item 11. Executive Compensation**

**2025 Summary Compensation Table**

The following table provides information regarding the compensation for services rendered that was earned by our named executive officers during the years ended December 31, 2025 and 2024.

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| **Name and**<br> **Principal** <br> **Position** | **Fiscal** <br> **Year** | **Salary** | **Stock**<br> **Awards(1)** | **Option**<br> **Awards(2)** | **Non-Equity** <br> **Incentive Plan Compensation(3)** | **All Other**<br> **Compensation(4)** | **Total** |
| Steven Lo | 2025 | $650000 | $776203 | $964910 | $407000 | $12306 | $2810918 |
| *President and Chief Executive Officer* | 2024 | $473810 | $290000 | $1044370 | $272000 | $5588 | $2085768 |
| James Cummings, M.D. | 2025 | $521000 | $208116 | $302106 | $210000 | $13272 | $1254494 |
| *Chief Medical Officer* | 2024 | $488087 | $104400 | $428192 | $179700 | $12156 | $1212535 |
| Sean Tucker, Ph.D. | 2025 | $465000 | $208116 | $279220 | $180000 | $12022 | $1144358 |
| *Chief Scientific Officer* | 2024 | $446267 | $104400 | $428192 | $164300 | $11872 | $1155031 |

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(1) Reflects the grant date fair value of time-based restricted stock unit awards computed in accordance with the Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, Topic 718. See Note 10 to the consolidated financial statements included in our Annual Report for the fiscal year ended December 31, 2025, filed with the SEC on March 13, 2026, for a discussion of the relevant assumptions used in calculating value pursuant to FASB ASC Topic 718. As required by SEC rules, the amounts shown exclude the impact of estimated forfeitures related to service-based vesting conditions. For 2025, the amount also includes the additional grant of 151,351 restricted stock unit awards as a spot bonus awarded to Mr. Lo related to his leadership.

(2) Reflects the grant date fair value of stock option awards for the applicable year computed in accordance with ASC Topic 718. See Note 10 to the consolidated financial statements included in our Annual Report for the fiscal year ended December 31, 2025, filed with the SEC on March 13, 2026, for a discussion of the relevant assumptions used in calculating the grant date fair value pursuant to FASB ASC Topic 718. As required by SEC rules, the amounts shown exclude the impact of estimated forfeitures related to service-based vesting conditions. Our named executive officers will only realize compensation to the extent the trading price of our common stock is greater than the exercise price of such stock options. For 2025, the amount also includes an additional grant of 50,000 stock option awards as a spot bonus awarded to Mr. Cummings in recognition of his achievements.

(3) Reflects the cash bonuses awarded to the named executive officers for the applicable year under the Short-Term Incentive Program. For 2025, the amount also includes the additional cash bonuses awarded to Dr. Cummings and Dr. Tucker under the 2024 Trial Launch Program.

(4) Reflects an employer match under the Company's 401(k) plan, premiums paid by the Company under the group-term life insurance program, and an employer match under the Health Savings Account as applicable.

**Elements of Total Direct Compensation**

A brief summary of our total direct compensation - consisting of base salary, STI opportunities and LTI opportunities - for our named executive officers is set forth below.

*Annual Base Salaries*

We provide a base salary to retain and attract key executive talent and to align our compensation with market practices. Base salaries are reviewed and established by the Compensation Committee on a competitive basis each year to better align with market levels.

During the annual performance review process in February 2025, the Compensation Committee approved an 8.3% merit increase for Mr. Lo, a 6.7% merit increase for Dr. Cummings, and a 4.2% merit increase for Dr. Tucker, in each case effective January 1, 2025. These adjustments were intended to recognize each executive's contributions to the Company and to align their base salary levels with the market data.

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For more information about the 2025 base salaries for each of our named executive officers, please refer to the "Salary" column of the 2025 Summary Compensation Table on page 12.

*Short-Term Incentive Compensation*

The STI program is designed to motivate our named executive officers to achieve annual business plan objectives and individual goals.

Each year the Compensation Committee establishes a STI award opportunity for our named executive officers. The Compensation Committee did not make any changes to the target STI award opportunities for Dr. Cummings and Dr. Tucker, which remained at 40% of their annual base salary. Mr. Lo's target STI award opportunity was increased from 50% to 55% of his annual base salary, plus increased STI award payment for 2025 of an additional $49,500, resulted in effective STI award opportunity of 63%.

The 2025 STI payout levels were determined by the Compensation Committee based on an overall assessment of corporate performance and individual contributions. The Compensation Committee approved certain corporate goals and objectives at the beginning of the year that generally focused on deliverables with respect to four primary areas: finance (focus on the Company's long-term viability), COVID-19 (relating to the partnership with BARDA for execution of the phase 2b trial), advancing the pipeline (generate preclinical and clinical data as well as enhance manufacturing capabilities), and operational excellence (maintain a culture of effectiveness, efficiency, compliance and strategic alignment across the enterprise).

Based on its assessment of overall corporate performance and the individual contributions of each participating executive, and its desire to retain a management team that is essential to our continued success, the Compensation Committee recommended, and the board of directors approved, an overall achievement level of 100% for the 2025 STI program, which funded a bonus pool that was allocated among the named executive officers based on recommendations of the Chief Executive Officer (other than with respect to himself) and final approval by the board of directors. The 2025 STI payouts were as follows: $407,000 for Mr. Lo; $210,000 for Dr. Cummings; and $180,000 for Dr. Tucker.

*2024 Trial Launch Bonus Program*

In February 2024, the board of directors, upon the recommendation of the Compensation Committee, approved a $1,000,000 bonus pool under a Trial Launch Bonus Program, that would be allocated and payable to each employee selected by the Chief Executive Officer (including Dr. Cummings and Dr. Tucker). Under this program, each of Dr. Cummings and Dr. Tucker were eligible to a pro-rata share of the bonus pool equal to 30% of his annual salary as in effect as of December 31, 2023, if he remained employed through the date that the first 1,000 volunteers in the Phase 2 trial had been dosed, which occurred on June 16, 2025. Dr. Cummings received a payout of $45,498 and Dr. Tucker received a payout of $43,114 under this program.

*Spot Bonus*

On March 5, 2025, the board of directors approved a spot bonus grant of a stock option to purchase 50,000 shares to Dr. Cummings to recognize his performance that shall vest as to 25% of the underlying shares of common stock on the first anniversary of the grant date and thereafter in thirty-six (36) equal monthly installments.

On December 4, 2025, the board of directors approved a spot bonus for Mr. Lo in the amount of $56,000 to reflect his leadership with respect to the Phase 2 trial and the licensing agreement with Dynavax. In lieu of cash, this spot bonus was paid to Mr. Lo in December 2025= by the issuance of fully vested restricted stock unit grant of 151,351 shares of common stock of equivalent value.

*Long-Term Incentives*

The Compensation Committee believes that a competitive LTI program is an important component of total direct compensation because it: (i) enhances the retentive value of our compensation; (ii) rewards executives for increasing our stock price and developing long-term value; and (iii) provides executives with an opportunity for stock ownership to align their interests with those of our stockholders.

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During the annual performance review process in 2025, the Compensation Committee, with the help of Aon, its independent compensation consultant, conducted a review of the LTI award opportunities for our officers. The Compensation Committee recommended, and the board of directors approved, a grant to (i) Mr. Lo of a stock option to purchase 2,108,000 shares and a restricted stock unit award covering 1,405,000 shares; (ii) to each of Dr. Cummings and Dr. Tucker, a stock option to purchase 610,000 shares and a restricted stock unit award covering 406,000 shares. Each stock option vests one-fourth on the first anniversary of the vesting commencement date and thereafter in equal monthly installments over the next three years, and each restricted stock unit award vests in four equal annual installments. In addition, during the annual performance review process in 2025, and as part of an "officer recognition program", the board of directors approved a one-time recognition award to Dr. Cummings of a stock option to purchase 50,000 shares to recognize his performance in securing the BARDA award, which vests one-fourth on the first anniversary of the vesting commencement date and thereafter in equal monthly installments over the next three years.

**Additional Compensation Arrangements**

*Severance Benefit Plan*

During 2025, each of the named executive officers participated in the Severance Benefit Plan (the "*Severance Plan*").

Under the Severance Plan, if a participating named executive officer were terminated other than for cause, death or disability, or resigned for good reason, other than in connection with a change in control, he would be entitled to receive (i) continued payment of base salary for six months (twelve months for Mr. Lo), and (ii) the portion of health insurance premiums paid by the Company, prior to the termination, under our group health insurance plans as provided under COBRA, until the end of the applicable salary continuation period (or, if earlier, such time as the named executive officer is eligible for health insurance coverage with a subsequent employer).

If a participating named executive officer were terminated other than for cause, death or disability, or resigned for good reason, either during the three months before or in the twelve months after a change in control, then he would be entitled to receive (in lieu of the benefits described above): (i) lump sum cash severance equal twelve months of base salary, (ii) the portion of health insurance premiums paid by the Company, prior to the termination, under our group health insurance plans as provided under COBRA, until the end of the applicable salary continuation period (or, if earlier, such time as the named executive officer is eligible for health insurance coverage with a subsequent employer), (iii) full vesting of any unvested time-based equity awards, and (iv) a pro-rated target annual bonus for the year of termination.

In exchange for the severance benefits, the participating named executive officers must agree to comply with the Company's standard employee invention assignment and confidentiality agreement, return all company property, and sign a release of claims in favor of the Company.

For purposes of the Severance Plan, the term "cause" generally means (i) engaging in willful or gross misconduct or willful or gross neglect; (ii) the commission of a felony or a crime involving any of the following: moral turpitude, dishonesty, breach of trust or unethical business conduct; or the commission of any crime involving the Company or any of its subsidiaries; (iii) fraud, misappropriation or embezzlement; or (iv) the abuse of illegal drugs or other controlled substances or habitual intoxication while providing services for the Company or any of its affiliates.

The term "good reason" generally means the occurrence of any of the following events without the participant's consent; (i) a material diminution in base salary or target bonus; (ii) a material diminution in authority, duties, or responsibilities; or (iii) a relocation of the principal place of employment or service to a location that increases his or her one-way commute distance by more than 35 miles, subject to applicable notice and cure provisions.

The Severance Plan does not provide a tax gross-up for named executive officers or any other employees in the event they are subject to golden parachute excise taxes on severance or other payments received in connection with a change in control. The Severance Plan promotes retention incentives for our executives by establishing severance protections for participants that are consistent with market levels, while eliminating the need to negotiate individual severance agreements in connection with an executive's termination or at the time of hire. The enhanced benefits available upon a change in control increase our retention incentives by reducing the personal uncertainty that arises from the possibility of a future business combination and promoting objectivity in the evaluation of transactions that are in the best interests of our stockholders.

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*Mr. Lo*

In connection with his appointment as President and Chief Executive Officer, Mr. Lo entered into a letter agreement with the Company, dated as of February 21, 2024. The letter agreement provided for an initial base salary equal to $600,000, a target STI award opportunity equal to 50% of his annual base salary and a grant under the Vaxart, Inc. 2024 Inducement Award Plan consisting of a stock option to purchase 1,000,000 shares that vests one-fourth on the first anniversary of his start date and thereafter in equal monthly installments over the next three years, and a restricted stock unit award covering 250,000 shares that vests in four equal annual installments. The letter agreement also provides that Mr. Lo will participate in the Severance Plan, with a severance multiple equal to twelve months.

*Dr. Cummings*

In connection with his appointment as Senior Vice President and Chief Medical Officer of the Company, Dr. Cummings entered into a letter agreement with the Company, dated as of August 16, 2021. The letter agreement provides for an initial base salary of $400,000 per year, an initial "target" bonus opportunity of 40% of his annual base salary and an initial grant of a stock option covering 300,000 shares (effective when he commenced the consulting services described below). In addition, the letter agreement provided that, prior to his start date, Dr. Cummings would provide certain consulting services to the Company at the direction of the Chief Executive Officer with respect to clinical and regulatory matters (including clinical trial design and regulatory strategies both in the U.S. and abroad), interactions with pan-governmental organizations such as WHO and CEPI, and business development activities. Dr. Cummings received a consulting fee at the rate of $100 per hour for these services and entered into a standard consulting agreement with the Company, which terminated on September 26, 2021, the day prior to the date he commenced employment.

*Dr. Tucker*

In connection with his appointment as Vice President, Research and Director of Immunology, Dr. Tucker entered into a letter agreement with the Company, dated as of May 20, 2006. The letter agreement provided that, if Dr. Tucker's employment were terminated without "cause", or he voluntarily resigned for "good reason", then one-half of his then outstanding and unvested stock options shall vest and become immediately exercisable, except that if there are fewer than one-half of the option shares unvested at that time, then all remaining unvested option shares would vest and become immediately exercisable. During the term of his employment, Dr. Tucker agreed that he would not render any commercial or professional services of any nature to any person or organization, whether or not for compensation, without the prior written consent of the board of directors. He also agreed not to directly or indirectly engage or participate in any business that is competitive with the Company's business.

*Retirement Plan*

We maintain a tax-qualified retirement plan that provides eligible employees, including our named executive officers, with an opportunity to save for retirement on a tax-advantaged basis. Eligible employees may defer eligible compensation up to certain tax code limits, which are updated annually. Employees are immediately and fully vested in their own contributions. We make matching contributions to participants in the 401(k) plan annually in arrears in an amount equal to the employee's deferral up to a maximum of 3% of the employee's annual eligible earnings, which are immediately and fully vested. As a tax-qualified retirement plan, contributions to the 401(k) plan are deductible by us when made, and contributions and earnings on those amounts are not taxable to the employees until withdrawn or distributed from the 401(k) plan. The named executive officers did not participate in, or otherwise receive any benefits under any pension plan or nonqualified deferred compensation plan.

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**Outstanding Equity Awards as of December 31, 2025**

The following table presents, for each of our named executive officers, information regarding outstanding stock options and RSUs held as of December 31, 2025.

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| | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
|  | **Options Awards** | **Options Awards** | **Options Awards** | **Options Awards** | **Options Awards** | **Options Awards** | **Options Awards** | **Stock Awards** | **Stock Awards** | **Stock Awards** |
| **Name** | **Vesting** <br> **commencement** <br> **date** | **Number of**<br> **securities**<br> **underlying**<br> **unexercised**<br> **options**<br> **exercisable** |  | **Number of**<br> **securities**<br> **underlying**<br> **unexercised**<br> **options**<br> **unexercisable** |  | **Options** <br> **exercise** <br> **price ($)** | **Options** <br> **expiration** <br> **date** | **Number of**<br> **shares or**<br> **units of stock**<br> **that have not**<br> **vested** |  | **Market value**<br> **of shares or**<br> **units of stock**<br> **that have not**<br> **vested(1)** |
| Steven Lo | 3/18/2024 | 437500 |  | 562500 | (2) | $1.16 | 3/17/2034 |  |  |  |
|  | 3/18/2024 |  |  |  |  |  |  | 187500 | (3) | $65625 |
|  | 3/24/2025 |  |  | 2108000 | (2) | $0.5126 | 3/24/2035 |  |  |  |
|  | 3/24/2025 |  |  |  |  |  |  | 1405000 | (3) | $491750 |
| James Cummings, M.D. | 8/16/2021 | 300000 |  |  | (2) | $8.44 | 8/15/2031 |  |  |  |
|  | 3/28/2022 | 246093 |  | 16406 | (2) | $5.09 | 3/27/2032 |  |  |  |
|  | 3/17/2023 | 290416 |  | 119584 | (2) | $0.78 | 3/16/2033 |  |  |  |
|  | 3/17/2023 | 205000 | (4) |  |  | $0.78 | 3/16/2033 |  |  |  |
|  | 3/17/2023 |  |  |  |  |  |  | 45000 | (3) | $15750 |
|  | 3/18/2024 | 179375 |  | 230625 | (2) | $1.16 | 3/17/2034 |  |  |  |
|  | 3/18/2024 |  |  |  |  |  |  | 67500 | (3) | $23625 |
|  | 3/24/2025 |  |  | 610000 | (2) | $0.5126 | 3/24/2035 |  |  |  |
|  | 3/24/2025 |  |  | 50000 | (2) | $0.5126 | 3/24/2035 |  |  |  |
|  | 3/24/2025 |  |  |  |  |  |  | 406000 | (3) | $142100 |
| Sean Tucker, Ph.D. |  |  |  |  |  |  |  |  |  |  |
|  | 6/14/2017 | 9060 | (4) |  |  | $4.07 | 6/23/2027 |  |  |  |
|  | 2/13/2018 | 14000 | (4) |  |  | $5.17 | 5/24/2028 |  |  |  |
|  | 5/10/2019 | 84061 | (4) |  |  | $0.77 | 5/11/2029 |  |  |  |
|  | 3/24/2020 | 360000 | (4) |  |  | $1.70 | 3/23/2030 |  |  |  |
|  | 3/25/2021 | 100000 |  |  | (2) | $6.27 | 3/24/2031 |  |  |  |
|  | 3/28/2022 | 246094 |  | 16406 | (2) | $5.09 | 3/27/2032 |  |  |  |
|  | 3/17/2023 | 205000 | (4) |  |  | $0.78 | 3/16/2033 |  |  |  |
|  | 3/17/2023 | 290416 |  | 119584 | (2) | $0.78 | 3/16/2033 |  |  |  |
|  | 3/17/2023 |  |  |  |  |  |  | 45000 | (3) | $15750 |
|  | 3/18/2024 | 179375 |  | 230625 | (2) | $1.16 | 3/17/2034 |  |  |  |
|  | 3/18/2024 |  |  |  |  |  |  | 67500 | (3) | $23625 |
|  | 3/24/2025 |  |  |  |  |  |  | 406000 | (3) | $142100 |
|  | 3/24/2025 |  |  | 610000 | (2) | $0.5126 | 3/24/2035 |  |  |  |

---

------

(1) Market value of restricted stock units that have not vested was determined by multiplying the number of shares by $0.35, the closing price of our common stock on December 31, 2025.

(2) The option award vests as to 25% of the underlying shares on the first anniversary of the applicable vesting commencement date and in 36 equal monthly installments thereafter.

(3) Reflects the remainder of an award that vest in four equal annual installments beginning on the first anniversary of the applicable vesting commencement date.

(4) The shares subject to these options are fully vested.

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**Policies and Practices Related to the Grant of Certain Equity Awards Close in Time to the Release of Material Nonpublic Information**

While we do not have a formal written policy in place with regard to the timing of awards of options in relation to the disclosure of material nonpublic information, our board of directors and the Compensation Committee do not seek to time equity grants to take advantage of information, either positive or negative, about our company that has not been publicly disclosed. Similarly, it is our practice not to time the release of material nonpublic information based on equity award grant dates or for the purpose of affecting the value of executive compensation.

During 2025, we did not grant any stock options to a named executive officer in the period beginning four business days before the filing of a periodic report on Form 10-Q or Form 10-K, or the filing or furnishing of a current report on Form 8-K that discloses material nonpublic information, and ending one business day after the filing or furnishing of such a report.

**DIRECTOR COMPENSATION**

During 2025, our non-employee directors were compensated in the following manner under our director compensation program.

The Company's director compensation program is designed to enhance our ability to attract and retain highly qualified directors and to align their interests with the long-term interests of its stockholders. The program includes a cash component, which is intended to compensate non-employee directors for their service on our board of directors and an equity component, which is intended to align the interests of non-employee directors and stockholders. Directors who are employees of the Company receive no additional compensation for their service on our board of directors.

The Compensation Committee annually reviews compensation paid to our non-employee directors and makes recommendations for adjustments, as appropriate, to the full board of directors. As part of this annual review, the Compensation Committee considers the significant time commitment and skill level required by each non-employee director in serving on our board of directors and its various committees. The Compensation Committee seeks to maintain a market competitive director compensation program and, with the assistance of its independent compensation consultant, benchmarks our director compensation program against those maintained by the peer group we use to evaluate our executive compensation program.

Under the director compensation program for 2025, our non-employee directors received the following cash compensation for their service on our board of directors and its committees:

● $40,000 annual cash retainer;

● $30,000 for the Chair of the board of directors;

● $25,000 for the Lead Director of the board of directors;

● $20,000 for the chair of the Audit Committee and $10,000 for each of its other members;

● $12,000 for the chair of the Compensation Committee, and $6,000 for each of its other members;

● $10,000 for the chair of the Nominating and Governance Committee, and $5,000 for each of its other members; and

● $15,000 for the chair of the Science and Technology Committee, and $7,500 for each of its other members.

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In addition, each non-employee director who is initially elected or appointed to the board after the effective date of the program shall automatically be granted on the day of such first election or appointment: (i) a stock option to purchase 190,800 shares of our shares of common stock, and (ii) a RSU award covering 32,000 shares of our common stock (the "*Initial Award*"). Each Initial Award shall vest and become exercisable in substantially equal installments on each of the first three anniversaries of the date of grant, subject to the non-employee director continuing in service on the board through each such vesting date.

A non-employee director who is serving on the board as of the date of any annual meeting after the effective date of the program, and who will continue to serve as a non-employee director immediately following such meeting, shall automatically be granted on the date of such annual meeting: (i) a stock option to purchase 95,400 shares of our common stock, and (ii) a RSU award covering 16,000 shares of our common stock (the "*Annual Award*"), which amounts are pro-rated for new directors to reflect their service since the last annual meeting. Each Annual Award shall vest and become exercisable on the earlier of (x) the first anniversary of the date of grant, or (y) the date immediately prior to the next annual meeting of the Company's stockholders following the date of grant, subject to the non-employee director continuing in service on the board through such vesting date.

Upon a change in control, all outstanding equity awards that are held by a non-employee director shall become fully vested and exercisable.

Dr. Wheadon has devoted, and continues to devote, significant time assisting and advising the Company, in his capacity as a member of the board, on regulatory, pipeline optimization, and clinical development strategies and his time commitment on these projects has significantly exceeded, and will continue to exceed, what is reasonably expected of a member of the board. On March 5, 2025, the board of directors compensated Dr. Wheadon for his additional services as a member of the board with an additional one-time cash retainer of $20,000.

Dr. Michael J. Finney retired as a director on September 30, 2025. In connection with Dr. Michael J. Finney's retirement, and as a special recognition of his prior service and significant contributions, the board of directors (i) accelerated the vesting of Dr. Michael J. Finney's outstanding stock options and restricted stock units, and (ii) extended the post-termination exercise period for each of Dr. Michael J. Finney's outstanding and vested stock options until the earlier of the second anniversary of the effective date of his retirement, or the expiration of the stated 10-year term of the stock option.<sup>2</sup>

**2025 Director Compensation**

The following table provides director compensation information for each of the non-employee directors of the board of directors who served during 2025.

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Name** | **Fees** <br> **earned or** <br> **paid in** <br> **cash** | **Stock** <br> **Awards(2)** | **Option** <br> **Awards(2)** | **Total** |
| Kevin P. Finney (1) | $50875 | $28355 | $150849 | $230079 |
| Dr. Michael J. Finney (1) | $63750 | $16571 | $89464 | $169785 |
| Elaine J. Heron, Ph.D. | $71175 | $11232 | $59112 | $141519 |
| W. Mark Watson | $73609 | $11232 | $59112 | $143953 |
| David Wheadon, M.D. | $82625 | $11232 | $59112 | $152969 |
| Robert A. Yedid(1) | $4744 | $- | $24339 | $29083 |

---

(1) Mr. Yedid resigned as a director on January 28, 2025, and Dr. Michael J. Finney retired as a director on September 30, 2025. Mr. Finney was appointed to serve on the board of directors on January 28, 2025.

(2) Reflects the grant date fair value of restricted stock unit awards and stock option awards for the year computed in accordance with ASC Topic 718. See Note 10 to the consolidated financial statements included in our Annual Report for the fiscal year ended December 31, 2025, filed with the SEC on March 13, 2026, for a discussion of the relevant assumptions used in calculating the grant date fair value pursuant to FASB ASC Topic 718. For Mr. Yedid and Dr. Michael J. Finney, the amounts also include the incremental fair value of their stock option and for Dr. Michael J. Finney the incremental fair value of his restricted stock unit awards, calculated in accordance with FASB ASC Topic 718, that were modified in connection with their retirement.

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Name** | **Number of** <br> **shares** <br> **underlying** <br> **RSUs** | **Number of** <br> **shares** <br> **underlying** <br> **RSUs** | **Number of** <br> **shares** <br> **underlying** <br> **stock options** | **Number of** <br> **shares** <br> **underlying** <br> **stock options** |
| Kevin P. Finney |  | 38103 |  | 227192 |
| Dr. Michael J. Finney |  | 16000 |  | 95400 |
| Elaine J. Heron, Ph.D. |  | 16000 |  | 95400 |
| W. Mark Watson |  | 16000 |  | 95400 |
| David Wheadon, M.D. |  | 16000 |  | 95400 |

---

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**Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters**

The following table sets forth beneficial ownership of the Company's Common Stock as of April 24, 2026 by:

● each person known to be the beneficial owner of more than 5% of the outstanding Common Stock of the Company;

● each of the Company's executive officers and directors; and

● all of the Company's current executive officers and directors as a group.

This table is based upon information supplied by officers, directors and principal stockholders and Schedules 13G filed with the SEC. Unless otherwise indicated in the footnotes to this table and subject to community property laws where applicable, we believe that each of the stockholders named in this table has sole voting and investment power with respect to the shares indicated as beneficially owned. Applicable percentages are based on 241,973,011 shares outstanding on April 24, 2026, adjusted as required by rules promulgated by the SEC.

Unless otherwise indicated, the address of each beneficial owner listed in the table below is c/o Vaxart, Inc., 310 Utah Ave, Suite 150, South San Francisco, California 94080.

---

| | | |
|:---|:---|:---|
| **Name of Beneficial Owners** | **Number of Shares** <br> **Beneficially Owned** | **Percentage of**<br> **Shares Beneficially**<br> **Owned** |
| ***5% or Greater Stockholders*** |  |  |
| none qualified | **0**<sup>0</sup> | \* |
| ***Executive Officers and Directors*** |  |  |
| Steven Lo | **1737689**<sup>(1)</sup> | \* |
| James Cummings, M.D. | **1898982**<sup>(3)</sup> | \* |
| Sean Tucker, Ph.D. | **2156165**<sup>(4)</sup> | \* |
| Michael J. Finney, Ph.D. | **1062885**<sup>(5)</sup> | \* |
| Kevin P. Finney | **283429**<sup>(6)</sup> | \* |
| Elaine J. Heron, Ph.D. | **417324**<sup>(7)</sup> | \* |
| W. Mark Watson | **447597**<sup>(8)</sup> | \* |
| David Wheadon, M.D. | **391698**<sup>(9)</sup> | \* |
| All directors and executive officers as a group (10 individuals)<sup>(10)</sup> | **10277261** | 4.2% |

---

------

(1) Consists of (i) 460,356 shares of common stock directly held by Mr. Lo, (ii) 100,000 shares held by The Lo Family Trust, and (iii) 1,177,333 shares issuable pursuant to stock options exercisable within 60 days of April 24, 2026.

(2) Consists of (i) 207,610 shares of common stock held directly by Mr. Floroiu, and (ii) 3,059,375 shares issuable pursuant to stock options exercisable within 60 days of April 24, 2026.

(3) Consists of (i) 366,691 shares of common stock held directly by Dr. Cummings, and (ii) 1,532,291 shares issuable pursuant to stock options exercisable within 60 days of April 24, 2026.

(4) Consists of (i) 310,811 shares held directly by Dr. Tucker, (ii) 51,465 shares held jointly by Frances Chang and Dr. Tucker, (iii) 9,060 shares held by Dr. Tucker's spouse, and (iv) 1,784,829 shares issuable pursuant to stock options exercisable within 60 days of April 24, 2026.

(5) Consists of (i) 686,840 shares of common stock held directly by Dr. Michael J. Finney, and (ii) 360,045 shares issuable pursuant to stock options exercisable and 16,000 shares issuable pursuant to restricted stock unit vesting within 60 days of April 24, 2026.

(6) Consists of (i) 166,668 shares of common stock held directly by Mr. Kevin P. Finney, and (ii) 99,992 shares issuable pursuant to stock options exercisable and 16,769 shares issuable pursuant to restricted stock unit vesting within 60 days of April 24, 2026.

(7) Consists of (i) 80,566 shares of common stock held directly by Dr. Heron, and (ii) 320,758 shares issuable pursuant to stock options exercisable and 16,000 shares issuable pursuant to restricted stock unit vesting within 60 days of April 24, 2026.

(8) Consists of (i) 108,125 shares of common stock held directly by Mr. Watson, and (ii) 323,472 shares issuable pursuant to stock options exercisable and 16,000 shares issuable pursuant to restricted stock unit vesting within 60 days of April 24, 2026.

(9) Consists of (i) 30,750 shares of common stock held directly by Dr. Wheadon, and (ii) 344,948 shares issuable pursuant to stock options exercisable within 60 days of April 24, 2026.

(10) Does not include Mr. Floroiu, who resigned as President and Chief Executive Officer of the Company and as a member of the board of directors in January 2024, and Mr. Yedid, who resigned as a member of the board of directors in January 2025.

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**Item 13. Certain Relationships and Related Transactions, and Director Independence**

**Related-Party Transaction Policy and Procedures**

We have adopted a written Related Party Transaction Policy that sets forth our policies and procedures regarding the identification, review, consideration and approval or ratification of "related party transactions." For purposes of our policy only, a "related party transaction" is a transaction, arrangement or relationship (including indebtedness or a guarantee of indebtedness) or any series of similar transactions, arrangements or relationships in which we and any "related party" are, were or will be participants involving an amount that exceeds $120,000 and in which any "related party" has a direct or indirect material interest. Certain types of related party transactions are deemed to be pre-approved or ratified, as applicable, including: (i) the payment of compensation by us to our executive officers or directors; and (ii) a transaction where the related party's interest arises solely from the ownership of a class of equity securities of the Company and all holders of that class of equity securities received the same benefit on a pro rata basis. A related party is any executive officer, director, nominee to become a director or more than 5% stockholder of us, including any of their immediate family members, and any entity owned or controlled by such persons. We describe below such transactions or series of similar transactions to which we have been or were a party since January 1, 2024.

Under the policy, where a transaction has been identified as a related party transaction, management must present information regarding the proposed related party transaction to the Audit Committee (or, where Audit Committee approval would be inappropriate, to another independent body of the board of directors) for consideration and approval or ratification. The presentation must include a description of, among other things, the material facts, the interests, direct and indirect, of the related parties, the benefits to us of the transaction and whether any alternative transactions were available. To identify related party transactions in advance, we rely on information supplied by our executive officers, directors and certain significant stockholders. In considering related party transactions, the Audit Committee takes into account the relevant available facts and circumstances including, but not limited to (a) the risks, costs and benefits to us, (b) the impact on a director's independence in the event the related party is a director, immediate family member of a director or an entity with which a director is affiliated, (c) the terms of the transaction, (d) the availability of other sources for comparable services or products and (e) the terms available to or from, as the case may be, unrelated third parties or to or from employees generally. In the event a director has an interest in the proposed transaction, the director must recuse himself or herself from the deliberations and approval. The policy requires that, in determining whether to approve, ratify or reject a related party transaction, the Audit Committee consider, in light of known circumstances, whether the transaction is in, or is not inconsistent with, the best interests of us and our stockholders, as the Audit Committee determines in the good faith exercise of its discretion.

**Certain Related-Person Transactions**

*Indemnity Agreements*

We have entered into indemnity agreements with our executive officers and directors which provide, among other things, that we will indemnify and advance expenses incurred in connection with certain actions, suits or proceedings to such officer or director, under the circumstances and to the extent provided for therein, for expenses, damages, judgments, fines and settlements he or she may be required to pay in actions or proceedings which he or she is or may be made a party by reason of his or her position as a director, officer or other agent of the Company, and otherwise to the fullest extent permitted under Delaware law and our Bylaws.

*Letter Agreements*

We have entered into letter agreements, employment agreements and change in control arrangements with our executive officers. For more information regarding these agreements, see the "Executive Compensation" section of this annual report.

On January 31, 2024, we entered into a Separation Agreement with Mr. Floroiu, our former President and Chief Executive Officer. For a description of Mr. Floroiu's separation arrangements, see the "Executive Compensation - Additional Compensation Arrangements" section of this annual report.

*Equity Grants*

We have granted stock options to our executive officers and members of our board of directors. For a description of our executive officers' options, see the "Executive Compensation - Outstanding Equity Awards as of December 31, 2025" section of this annual report.

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**Item 14. Principal Accounting Fees and Services**

**Principal Accountant Fees and Services**

The following table represents aggregate fees billed to Vaxart for the years ended December 31, 2025 and 2024, by WithumSmith+Brown, PC.

---

| | | |
|:---|:---|:---|
|  | **WithumSmith+Brown, PC for the Year**<br> **Ended December 31, 2025** | **WithumSmith+Brown, PC for the Year**<br> **Ended December 31, 2024** |
| Audit Fees(1) | $670649 | $730038 |
| Audit-Related Fees |  |  |
| Tax Fees |  |  |
| All Other Fees |  |  |
| Total Fees | $670649 | $730038 |

---

(1) Audit Fees consisted of fees for professional services rendered for the audits of our financial statements, including the audits of our annual financial statements and reviews of our interim quarterly reports, and services provided in connection with SEC filings, including consents and comfort letters.

**Pre-Approval Policies and Procedures**

The Audit Committee has adopted a policy and procedures for the pre-approval of audit and non-audit services rendered by our independent registered public accounting firm, WithumSmith+Brown, PC. The policy generally pre-approves specified services in the defined categories of audit services, audit-related services and tax services up to specified amounts. Pre-approval may also be given as part of the Audit Committee's approval of the scope of the engagement of the independent auditor or on an individual, explicit, case-by-case basis before the independent auditor is engaged to provide each service. The pre-approval of services may be delegated to one or more of the Audit Committee's members, but the decision must be reported to the full Audit Committee at its next scheduled meeting.

The Audit Committee has determined that the rendering of services other than audit services by WithumSmith+Brown, PC is compatible with maintaining the principal accountant's independence.

All services rendered by WithumSmith+Brown, PC for the year ended December 31, 2025 were pre-approved in accordance with the policies set forth above.

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**PART IV**

**Item 15**. **Exhibits and Financial Statement Schedules**

Part IV (Item 15) of the Original Form 10-K is hereby amended solely to add the following exhibits required to be filed in connection with this Amendment on Form 10-K/A.

(3) Exhibits

The exhibits required to be filed by Item 15 are set forth in, and filed with or incorporated by reference in, the "Exhibit Index" of the Original Form 10-K. The "Exhibit Index" to this Amendment sets forth the additional exhibits required to be filed with this Amendment.

**EXHIBIT INDEX**

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  |  | **Incorporated by Reference** | **Incorporated by Reference** | **Incorporated by Reference** | **Incorporated by Reference** |
| **Exhibit**<br> **Number** | **Description of Document** | **Schedule/Form** | **File**<br> **Number** | **Exhibit** | **Filing**<br> **Date** |
| 31.1\* | [<u>Certification of Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d - 14(a)</u>](ex_953265.htm) |  |  |  |  |
| 31.2 \* | [<u>Certification</u> of Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d - 14(a)](ex_953266.htm) |  |  |  |  |
| 101.INS \* | Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File as its XBRL tags are embedded within the Inline XBRL document |  |  |  |  |
| 101.SCH \* | Inline XBRL Taxonomy Extension Schema Document |  |  |  |  |
| 101.CAL \* | Inline XBRL Taxonomy Extension Calculation Linkbase Document |  |  |  |  |
| 101.DEF \* | Inline XBRL Taxonomy Extension Definition Linkbase Document |  |  |  |  |
| 101.LAB \* | Inline XBRL Taxonomy Extension Label Linkbase Document |  |  |  |  |
| 101.PRE \* | Inline XBRL Taxonomy Extension Presentation Linkbase Document |  |  |  |  |
| 104 | Cover Page Interactive Data File (Formatted as Inline XBRL and contained in Exhibit 101) |  |  |  |  |

---

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**\*** Filed or furnished herewith

**Item 16. Form 10-K Summary**

None.

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**SIGNATURES**

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this Amendment to be signed on its behalf by the undersigned, thereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  |  | VAXART, INC. |
|  | By: | /s/ STEVEN LO |
| Date: April 30, 2026 |  | Steven Lo |
|  |  | *President and Chief Executive Officer* |

---

**POWER OF ATTORNEY**

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Steven Lo and Jeroen Grasman, and each of them, as his or her attorneys-in-fact, with the power of substitution, for him or her in any and all capacities, to sign any amendments to this report, and to file the same, with exhibits thereto and other documents in connection therewith with the Securities and Exchange Commission, hereby ratifying and confirming all that said attorneys-in-fact, and each of them, or his or her substitute or substitutes may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this Amendment has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

---

| | | |
|:---|:---|:---|
| **SIGNATURE** | **TITLE** | **DATE** |
| /s/ STEVEN LO |  |  |
| Steven Lo | President and Chief Executive Officer, and Director<br> *(Principal Executive Officer)* | April 30, 2026 |
| /s/ JEROEN GRASMAN |  |  |
| Jeroen Grasman | Chief Financial Officer<br> *(Principal Financial and Accounting Officer)* | April 30, 2026 |
| /s/ W. MARK WATSON |  |  |
| W. Mark Watson | Lead Independent Director | April 30, 2026 |
| /s/ KEVIN FINNEY |  |  |
| Kevin Finney | Director | April 30, 2026 |
| /s/ ELAINE J. HERON |  |  |
| Elaine J. Heron, Ph.D. | Director | April 30, 2026 |
| /s/ DAVID WHEADON |  |  |
| David Wheadon M.D. | Director | April 30, 2026 |
| /s/ JAMES B. BREITMEYER |  |  |
| James B. Breitmeyer, M.D., Ph.D.  | Director | April 30, 2026 |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

## Exhibit 31.1

**EXHIBIT 31.1**

**CERTIFICATION PURSUANT TO SECTION 302**

**OF THE SARBANES-OXLEY ACT OF 2002**

I, Steven Lo, certify that:

1. I have reviewed this Annual Report on Form 10-K/A of Vaxart, Inc.

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: April 30, 2026

---

| |
|:---|
| */s/ Steven Lo* |
| Steven Lo |
| President and Chief Executive Officer |
| (Principal Executive Officer) |

---

## Exhibit 31.2

**Exhibit 31.2**

**CERTIFICATIONS UNDER SECTION 302**

I, Jeroen Grasman, certify that:

1. I have reviewed this Amendment No. 1 to the annual report on Form 10-K/A of Vaxart, Inc.; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

Date: April 30, 2026

<u>/s/ *Jeroen Grasman*</u>

Name: Jeroen Grasman

Title: Chief Financial Officer

(*Principal Financial Officer and Principal Accounting Officer*)