Vaxart, Inc. SEC filings VXRT
Vaxart, Inc. has 1,002 filings in SEC EDGAR's recent list, going back to May 18, 2011. Its latest annual report, Form ARS, was filed on Jun 1, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Oct 20, 2026 | Oct 16, 2026 |
| 3 | Initial insider ownership | Oct 20, 2026 | Oct 16, 2026 |
| 4 | Insider transaction | Jul 20, 2026 | Jul 16, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 16, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 16, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 16, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 16, 2026 |
| 4 | Insider transaction | May 26, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 1, 2026 | Apr 23, 2026 |
| 3 | Initial insider ownership | May 1, 2026 | Apr 23, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 28, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 28, 2026 |
| 4 | Insider transaction | Mar 26, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 26, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 26, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 26, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 20, 2026 | Mar 18, 2026 |
| 4 | Insider transaction | Mar 20, 2026 | Mar 18, 2026 |
| 4 | Insider transaction | Mar 20, 2026 | Mar 18, 2026 |
| 4 | Insider transaction | Mar 20, 2026 | Mar 18, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 4, 2025 |
| 144 | Notice of proposed sale | Dec 8, 2025 | — |
| 4 | Insider transaction | Dec 5, 2025 | Nov 17, 2025 |
| 4 | Insider transaction | Nov 21, 2025 | Nov 17, 2025 |
| 4 | Insider transaction | Aug 19, 2025 | Jul 17, 2025 |
| 4 | Insider transaction | Jul 31, 2025 | Jul 29, 2025 |
| 4 | Insider transaction | Jun 16, 2025 | Jun 13, 2025 |
| 4 | Insider transaction | Jun 16, 2025 | Jun 13, 2025 |
| 4 | Insider transaction | Jun 16, 2025 | Jun 13, 2025 |
| 4 | Insider transaction | Jun 16, 2025 | Jun 13, 2025 |
| 4 | Insider transaction | Jun 16, 2025 | Jun 13, 2025 |
| 144 | Notice of proposed sale | May 27, 2025 | — |
| 4 | Insider transaction | May 20, 2025 | May 19, 2025 |
| 3 | Initial insider ownership | May 20, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 19, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 8, 2025 | — |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Mar 26, 2025 | Mar 24, 2025 |
| 4 | Insider transaction | Mar 26, 2025 | Mar 24, 2025 |
| 4 | Insider transaction | Mar 26, 2025 | Mar 24, 2025 |
| 4 | Insider transaction | Mar 26, 2025 | Mar 24, 2025 |
| 4 | Insider transaction | Mar 26, 2025 | Mar 24, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 28, 2023 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 10, 2025 | — |
| 4 | Insider transaction | Feb 4, 2025 | Feb 2, 2025 |
| 4 | Insider transaction | Feb 4, 2025 | Feb 2, 2025 |
| 4 | Insider transaction | Feb 4, 2025 | Feb 2, 2025 |
| 4 | Insider transaction | Jan 29, 2025 | Jan 28, 2025 |
| 3 | Initial insider ownership | Jan 29, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Dec 17, 2024 | Dec 15, 2024 |
| 4 | Insider transaction | Jun 20, 2024 | Jun 18, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 12, 2024 |
| 4 | Insider transaction | Jun 12, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 12, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 12, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 12, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 12, 2024 | Jun 11, 2024 |
| 4/A | Form 4/a | Apr 1, 2024 | Mar 28, 2023 |
| 4 | Insider transaction | Apr 1, 2024 | Mar 28, 2024 |
| 4 | Insider transaction | Apr 1, 2024 | Mar 28, 2024 |
| 4 | Insider transaction | Mar 20, 2024 | Mar 28, 2023 |
| 4 | Insider transaction | Mar 20, 2024 | Dec 8, 2023 |
| 4 | Insider transaction | Mar 20, 2024 | Dec 8, 2023 |
| 4 | Insider transaction | Mar 20, 2024 | Dec 8, 2023 |
| 4 | Insider transaction | Mar 20, 2024 | Mar 18, 2024 |
| 3 | Initial insider ownership | Mar 20, 2024 | Mar 18, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Jan 19, 2024 | — |
| 4 | Insider transaction | Aug 1, 2023 | Jun 26, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jun 26, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jun 26, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jun 26, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jun 26, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Jul 7, 2023 | — |
| 4 | Insider transaction | Jun 14, 2023 | Jun 12, 2023 |
| 4/A | Form 4/a | May 11, 2023 | Mar 17, 2023 |
| 4 | Insider transaction | Mar 21, 2023 | Mar 17, 2023 |
| 4 | Insider transaction | Mar 21, 2023 | Mar 17, 2023 |
| 4 | Insider transaction | Mar 21, 2023 | Mar 17, 2023 |
| 4 | Insider transaction | Mar 21, 2023 | Mar 17, 2023 |
| 4 | Insider transaction | Mar 21, 2023 | Mar 17, 2023 |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 1, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 10, 2023 | — |
| 4 | Insider transaction | Dec 30, 2022 | Dec 16, 2022 |
| 3 | Initial insider ownership | Dec 30, 2022 | Dec 15, 2022 |
| 4 | Insider transaction | Dec 28, 2022 | Dec 28, 2022 |
| 4 | Insider transaction | Oct 7, 2022 | Jan 10, 2022 |
| 4 | Insider transaction | Aug 26, 2022 | Aug 24, 2022 |
| 4 | Insider transaction | Aug 25, 2022 | Aug 25, 2022 |
| 3 | Initial insider ownership | Aug 25, 2022 | Aug 25, 2022 |
| 4 | Insider transaction | Aug 22, 2022 | Aug 19, 2022 |
| 4 | Insider transaction | Aug 8, 2022 | Aug 4, 2022 |
| 4 | Insider transaction | Aug 8, 2022 | Aug 4, 2022 |
| 4 | Insider transaction | Aug 8, 2022 | Aug 4, 2022 |
| 4 | Insider transaction | Aug 8, 2022 | Aug 4, 2022 |
| 4 | Insider transaction | Aug 8, 2022 | Aug 4, 2022 |
| 4 | Insider transaction | Aug 8, 2022 | Aug 4, 2022 |
| 3 | Initial insider ownership | Aug 8, 2022 | Aug 4, 2022 |
| 4 | Insider transaction | Jun 23, 2022 | Jun 22, 2022 |
| 3 | Initial insider ownership | May 12, 2022 | May 11, 2022 |
| 4 | Insider transaction | Apr 25, 2022 | Apr 22, 2022 |
| 4 | Insider transaction | Mar 30, 2022 | Mar 28, 2022 |
| 4 | Insider transaction | Mar 30, 2022 | Mar 28, 2022 |
| 4 | Insider transaction | Mar 30, 2022 | Mar 28, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Mar 10, 2022 | — |
| 4 | Insider transaction | Feb 22, 2022 | Feb 15, 2022 |
| 3 | Initial insider ownership | Feb 22, 2022 | Feb 14, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 7, 2022 | — |
| 4 | Insider transaction | Dec 23, 2021 | Dec 22, 2021 |
| 4 | Insider transaction | Dec 1, 2021 | Nov 30, 2021 |
| 4 | Insider transaction | Oct 13, 2021 | Oct 12, 2021 |
| 3 | Initial insider ownership | Oct 7, 2021 | Sep 27, 2021 |
| 4 | Insider transaction | Sep 13, 2021 | Sep 10, 2021 |
| 4 | Insider transaction | Aug 23, 2021 | Aug 20, 2021 |
| 3 | Initial insider ownership | Aug 23, 2021 | Aug 20, 2021 |
| 4 | Insider transaction | Aug 11, 2021 | Aug 10, 2021 |
| 4 | Insider transaction | Aug 11, 2021 | Aug 10, 2021 |
| 4 | Insider transaction | Jul 21, 2021 | Jul 19, 2021 |
| 4 | Insider transaction | Jun 21, 2021 | Jun 18, 2021 |
| 4 | Insider transaction | Jun 17, 2021 | Jun 16, 2021 |
| 4 | Insider transaction | Jun 17, 2021 | Jun 16, 2021 |
| 4 | Insider transaction | Jun 17, 2021 | Jun 16, 2021 |
| 4 | Insider transaction | Jun 17, 2021 | Jun 16, 2021 |
| 4 | Insider transaction | Jun 17, 2021 | Jun 16, 2021 |
| 4 | Insider transaction | Jun 17, 2021 | Jun 16, 2021 |
| 4 | Insider transaction | Jun 17, 2021 | Jun 16, 2021 |
| 4 | Insider transaction | Jun 17, 2021 | Jun 16, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 11, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 11, 2021 |
| 4/A | Form 4a davis | Jun 14, 2021 | Nov 18, 2019 |
| 4/A | Form 4a yedid | Jun 14, 2021 | Nov 18, 2019 |
| 4 | Insider transaction | Jun 11, 2021 | Jun 9, 2021 |
| 4 | Insider transaction | May 10, 2021 | May 6, 2021 |
| 3 | Initial insider ownership | Apr 23, 2021 | Apr 21, 2021 |
| 4 | Insider transaction | Mar 18, 2021 | Mar 16, 2021 |
| 4 | Insider transaction | Mar 5, 2021 | Mar 4, 2021 |
| SC 13G | Ownership over 5% (passive) | Feb 11, 2021 | — |
| 4 | Insider transaction | Nov 23, 2020 | Nov 23, 2020 |
| 4 | Insider transaction | Aug 27, 2020 | Aug 25, 2020 |
| 3 | Initial insider ownership | Aug 27, 2020 | Aug 25, 2020 |
| 4 | Insider transaction | Aug 14, 2020 | Aug 13, 2020 |
| 4 | Insider transaction | Aug 12, 2020 | Aug 12, 2020 |
| 4 | Insider transaction | Jun 30, 2020 | Jun 26, 2020 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 30, 2020 | — |
| 4 | Insider transaction | Jun 17, 2020 | Jun 15, 2020 |
| 4 | Insider transaction | Jun 9, 2020 | Jun 8, 2020 |
| 4 | Insider transaction | Jun 9, 2020 | Jun 8, 2020 |
| 4 | Insider transaction | Jun 9, 2020 | Jun 8, 2020 |
| 4 | Insider transaction | Jun 9, 2020 | Jun 8, 2020 |
| 4 | Insider transaction | Jun 9, 2020 | Jun 8, 2020 |
| 4 | Insider transaction | Jun 9, 2020 | Jun 8, 2020 |
| 4 | Insider transaction | Jun 9, 2020 | Jun 8, 2020 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 9, 2020 | — |
| 4 | Insider transaction | Jun 3, 2020 | Jun 1, 2020 |
| 4 | Insider transaction | May 29, 2020 | May 27, 2020 |
| SC 13D/A | Amended ownership over 5% (active) | May 27, 2020 | — |
| 4 | Insider transaction | May 22, 2020 | May 20, 2020 |
| 4 | Insider transaction | May 18, 2020 | May 14, 2020 |
| SC 13D/A | Amended ownership over 5% (active) | May 18, 2020 | — |
| 4 | Insider transaction | May 13, 2020 | May 11, 2020 |
| 4 | Insider transaction | May 8, 2020 | May 6, 2020 |
| 4 | Insider transaction | May 5, 2020 | May 1, 2020 |
| SC 13D/A | Amended ownership over 5% (active) | May 5, 2020 | — |
| 4 | Insider transaction | Apr 30, 2020 | Apr 28, 2020 |
| 4 | Insider transaction | Apr 30, 2020 | Apr 28, 2020 |
| 3/A | Form 3/a | Apr 30, 2020 | Oct 25, 2019 |
| 3 | Initial insider ownership | Apr 14, 2020 | Apr 13, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 8, 2020 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 22, 2019 | — |
| 4 | Insider transaction | Nov 20, 2019 | Nov 18, 2019 |
| 4 | Insider transaction | Nov 20, 2019 | Nov 18, 2019 |
| 4 | Insider transaction | Nov 7, 2019 | Nov 5, 2019 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 1, 2019 | — |
| 3 | Initial insider ownership | Nov 1, 2019 | Oct 25, 2019 |
| 3 | Initial insider ownership | Nov 1, 2019 | Oct 25, 2019 |
| 3 | Initial insider ownership | Nov 1, 2019 | Oct 25, 2019 |
| 4 | Insider transaction | Oct 15, 2019 | Oct 11, 2019 |
| SC 13D/A | Amended ownership over 5% (active) | Oct 8, 2019 | — |
| 4 | Insider transaction | Oct 7, 2019 | Oct 4, 2019 |
| 4 | Insider transaction | Oct 3, 2019 | Oct 1, 2019 |
| SC 13D | Ownership over 5% (active) | Oct 1, 2019 | — |
| 4 | Insider transaction | Sep 30, 2019 | Sep 26, 2019 |
| 3 | Initial insider ownership | Sep 30, 2019 | Sep 26, 2019 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- VXRT (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- South San Francisco, CA
- SEC filer status
- Accelerated filer, Smaller reporting company
- SEC CIK
- 72444
- Former names
- Aviragen Therapeutics, Inc. (until Feb 15, 2018); Biota Pharmaceuticals, Inc. (until Apr 13, 2016); NABI BIOPHARMACEUTICALS (until Nov 8, 2012); NABI BIOPHARMACEUTICALS (until Jun 29, 2010); NABI /DE/ (until Feb 14, 2002)
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All 182 Biological Products, (No Diagnostic Substances) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.