No insider purchase over the last 90 days. The latest, by Watson W. Mark, was filed 05 Dec 2025.
Vaxart, Inc., founded in 2004, is a Healthcare & Pharma company based in San Francisco, United States. Its directors and officers file their transactions with SEC (Form 4). From 22 October 2025 to 22 October 2026, the disclosure feed for Vaxart, Inc. logged 32 filings by 11 insiders.
Not one open-market sale was filed. On the buying side, 2 insiders reported 4 purchases totalling €21k. Buying on the open market means paying the going price with one's own funds, a different act from receiving shares as pay. Heron Elaine J filed the largest purchase, €7,855, on 21 November 2025. Those buying include 2 senior executives.
Within a 30-day window, 2 purchases overlapped with buying by a second insider. Purchases made close together by different insiders form what is called a cluster. The last insider purchase was made public on 5 December 2025, 322 days ago. Typically, a trade is published a median of 2 days after it takes place. For comparison, the SEC allows two business days to file a Form 4.
Across the 277 companies tracked on its exchange, the median is 8 filings; at 32 filings, this issuer sits above that mark. Since 2016, the database holds 48 purchases and 63 sales by insiders of the company. For the fiscal year to 31 December 2025, the annual 10-K puts revenue at 237.3 m USD and net income at 16.3 m USD.
In the same sector, recent insider purchases at Xenon Pharmaceuticals Inc. and Vivos Inc also feature in our signals. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.
Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.
This score ranks the purchase within its own market. A position size is suggested only on the venues of the backtested strategy universe; elsewhere, signals stay on watch. Not investment advice.
Transparent value + quality ranking, distinct from the insider signal.
FY ended December 2025 · cache
25 of 267 declarations
Vaxart, Inc. is a U.S.-listed clinical-stage biotechnology company traded on NASDAQ under the ticker VXRT. Headquartered in South San Francisco, California, the company develops oral recombinant pill vaccines and is trying to offer a differentiated alternative to conventional injectable vaccines. From an equity perspective, Vaxart is best viewed as a development-stage biotech with a proprietary platform rather than a commercial-stage vaccine manufacturer; its valuation is therefore primarily driven by clinical data, partnership value, and the strength of its intellectual property.
The company’s scientific roots are closely tied to Sean Tucker, Ph.D., Vaxart’s Founder and Chief Scientific Officer since February 2010. Vaxart’s core thesis is that oral vaccination may improve convenience, logistics, and potentially immune responses at mucosal surfaces, particularly in the gut. That strategy is important because mucosal immunity is a major area of interest in infectious disease prevention. The current leadership team is built around seasoned biotech and vaccine executives, with Steven Lo as Chief Executive Officer, reflecting a focus on clinical execution, business development, and capital allocation.
Vaxart’s main programs are in COVID-19, norovirus, HPV, and influenza. The most advanced asset is its oral COVID-19 vaccine candidate, which is being evaluated in a phase 2b study of roughly 5,400 participants against an approved mRNA comparator. In November 2025, Vaxart announced an exclusive worldwide license and collaboration agreement with Dynavax Technologies for the COVID-19 oral vaccine candidate, including upfront consideration, an equity investment, and potential future milestone and royalty payments. This kind of transaction is important for investors because it can validate the platform while extending financial runway.
The norovirus program is another key strategic asset. Throughout 2025, Vaxart reported positive clinical updates on its second-generation norovirus constructs, including data suggesting stronger antibody responses than its first-generation technology. The company has also highlighted preclinical and clinical work in HPV and flu, which could eventually broaden the platform beyond the lead infectious disease targets. However, Vaxart does not yet have a marketed product portfolio, so the investment case remains highly dependent on pipeline progression and trial readouts.
In competitive terms, Vaxart’s differentiation lies not in scale, but in route of administration and platform design. It competes indirectly with large vaccine companies and, more broadly, with alternative prophylactic technologies. For investors in France, Belgium, and Switzerland, this is a high-risk, high-upside biotech story where execution, regulatory milestones, and partner interest matter far more than current revenues.
Recent milestones include continued enrollment and follow-up in the phase 2b COVID-19 trial, the Dynavax licensing deal announced in late 2025, and multiple 2025–2026 updates supporting the company’s norovirus platform. Vaxart therefore remains a speculative but potentially disruptive U.S. NASDAQ-listed vaccine developer.
Purchases our model currently ranks for the recommendations list.
All recommendationsInsider filings
Over the last 90 days, 1 filing published on 20 October 2026: no open-market purchase or sale filed by an insider. 1 other filing (not open-market purchases or sales: grants, options, plans, sale notices, block transfers).
Summary written automatically from public filings, without human review. General information, identical for every reader: it is not investment advice or a recommendation to buy or sell. Investing involves a risk of capital loss. Generated on 21 October 2026 (UTC)
Headquarters: San Francisco, United States · Founded: 2004 · Wikipedia article
Source: Wikidata (CC0).
| Fiscal year end | Revenue | Net income | Diluted EPS | Filing |
|---|---|---|---|---|
| Dec 2025 | 237.3 m USD | 16.3 m USD | 0.07 USD | 10-K |
| Dec 2024 | 28.7 m USD | -66.9 m USD | -0.33 USD | 10-K |
| Dec 2023 | 7.4 m USD | -82.5 m USD | n.d. | 10-K |
| Dec 2022 | 107,000 USD | -107.8 m USD | n.d. | 10-K |
| Dec 2021 | 892,000 USD | -70.5 m USD | n.d. | 10-K |
Amounts in USD, as filed (forms 10-K, 20-F or 40-F). Source: SEC EDGAR.