Vaxart, Inc. (VXRT)
VXRT moved a median of -0.80% 30 minutes after news, and -0.76% by the close. How VXRT actually reacts to news — the realized, point-in-time move the market made, measured across 342 labeled events over the last three years with zero look-ahead.
VXRT’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 45% | 341 |
| 30-min | -0.80% | 42% | 342 |
| 60-min | -0.41% | 43% | 342 |
| to close | -0.76% | 38% | 341 |
| Middle 50% of VXRT reactions | -2.34% to +1.34% |
|---|---|
| Median reaction (30-min) | -0.80% |
| Measured reactions | 342 |
Half of all Vaxart, Inc. news events land between -2.34% and +1.34% at 30 minutes.
Reaction stats as of 2026-08-31. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when VXRT moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to VXRT's baseline. Nothing else.
Recent VXRT events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Vaxart to Present at the H.C. Wainwright 28th Annual Global Investment Conference | Press release | GlobeNewswire | +1.40% | +2.15% | |
| Vaxart Expands Intellectual Property Portfolio with European Patent Protecting Proprietary Norovirus Vaccine Technology | Press release | GlobeNewswire | -0.42% | +0.22% | |
| Form 8-K Vaxart, Inc. For: Aug 21 | SEC filing · Form 8-K | SEC EDGAR | -0.98% | -1.08% | |
| Form 10-Q Vaxart, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -2.63% | -3.42% | |
| Form 8-K Vaxart, Inc. For: Aug 06 | SEC filing · Form 8-K | SEC EDGAR | -2.63% | -3.42% | |
| Vaxart Provides Business Update and Reports Second Quarter 2026 Financial Results | Press release | GlobeNewswire | -2.63% | -3.42% | |
| Vaxart to Host Stockholder Fireside Chat on August 7 at 4:30 p.m. ET | Press release | GlobeNewswire | +3.20% | +12.11% | |
| Form 8-K Vaxart, Inc. For: Jul 27 | SEC filing · Form 8-K | SEC EDGAR | +4.66% | +6.85% | |
| Vaxart to Participate in BTIG Biotechnology Conference 2026 | Press release | GlobeNewswire | -3.87% | -3.11% | |
| Form 8-K Vaxart, Inc. For: Jul 16 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.82% | |
| Vaxart Announces Results of Annual Meeting of Stockholders | Press release | GlobeNewswire | +0.00% | -2.82% | |
| Form 8-K Vaxart, Inc. For: Jul 06 | SEC filing · Form 8-K | SEC EDGAR | +2.19% | -10.17% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -3.59% | |
| Vaxart Reports Topline 12-Month Safety Data From the 400-Participant Sentinel Safety Cohort of the Phase 2b Clinical Trial of Its Oral Pill COVID-19 Vaccine | Press release | GlobeNewswire | +2.19% | -10.17% | |
| Form 8-K Vaxart, Inc. For: Jul 01 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +4.92% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -3.59% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | +4.92% | |
| Vaxart Enters Cooperation Agreement with Stockholder Group and Announces Board and Corporate Governance Enhancements | Press release | GlobeNewswire | +0.00% | +4.92% | |
| Form 8-K Vaxart, Inc. For: Jun 22 | SEC filing · Form 8-K | SEC EDGAR | +1.85% | +5.93% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +1.01% | +7.90% | |
| Vaxart Publishes Presentation Urging Shareholders to Vote “FOR” ALL Six of the Company’s Highly Qualified Director Nominees on the WHITE Proxy Card TODAY | Press release | GlobeNewswire | +1.01% | +7.90% | |
| Vaxart Announces Update to BARDA Funding Award to Reflect Current Scope of COVID-19 Oral Pill Vaccine Trial | Press release | GlobeNewswire | +1.76% | +0.18% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -0.60% | -3.60% | |
| Vaxart’s Two Newest Independent Directors James Breitmeyer, M.D., Ph.D., and Kevin Finney Send Letter to Shareholders Ahead of 2026 Annual Meeting | Press release | GlobeNewswire | -0.60% | -3.60% | |
| Vaxart to Showcase Oral Vaccine Platform and Strategic Vision at BIO 2026 and Taiwan Biotech Forum | Press release | GlobeNewswire | +3.57% | +2.68% | |
| Vaxart to Participate in BTIG Infectious Disease Day 2026 | Press release | GlobeNewswire | +1.21% | -3.33% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +3.66% | +0.10% | |
| Vaxart Urges Shareholders to Vote “FOR” ALL Six of the Company’s Highly Qualified Director Nominees on the WHITE Proxy Card TODAY | Press release | GlobeNewswire | +3.66% | +0.10% | |
| Form ARS Vaxart, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.79% | +0.00% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -1.73% | -1.18% | |
| Vaxart Files Definitive Proxy Statement and Mails Letter to Shareholders | Press release | GlobeNewswire | -1.73% | -1.18% | |
| Form PRER14A Vaxart, Inc. | SEC filing · Form PRER14A | SEC EDGAR | -1.73% | -1.18% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -6.27% | -4.70% | |
| Form 8-K Vaxart, Inc. For: May 19 | SEC filing · Form 8-K | SEC EDGAR | -6.27% | -4.70% | |
| Form DEFA14A Vaxart, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -6.27% | -4.70% | |
| Form EFFECT Vaxart, Inc. | SEC filing · Form EFFECT | SEC EDGAR | +2.40% | -1.61% | |
| Vaxart Files Preliminary Proxy Statement and Issues Open Letter to Shareholders | Press release | GlobeNewswire | -6.27% | -4.70% | |
| Form S-1/A Vaxart, Inc. | SEC filing · Form S-1 | SEC EDGAR | -0.11% | -9.06% | |
| Form S-1 Vaxart, Inc. | SEC filing · Form S-1 | SEC EDGAR | -0.76% | -6.19% | |
| Form 10-Q Vaxart, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -4.30% | -5.66% | |
| Form 8-K Vaxart, Inc. For: May 07 | SEC filing · Form 8-K | SEC EDGAR | -4.30% | -5.66% | |
| Vaxart Provides Business Update and Reports First Quarter 2026 Financial Results | Press release | GlobeNewswire | -4.30% | -5.66% | |
| Form EFFECT Vaxart, Inc. | SEC filing · Form EFFECT | SEC EDGAR | -0.07% | +0.26% | |
| Vaxart to Host Stockholder Fireside Chat on May 8 at 4:30 p.m. ET | Press release | GlobeNewswire | -0.07% | +0.26% | |
| Form 10-K/A Vaxart, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.07% | +0.26% | |
| Form 8-K Vaxart, Inc. For: Apr 23 | SEC filing · Form 8-K | SEC EDGAR | -2.33% | -3.20% | |
| Vaxart Appoints James Breitmeyer, M.D., Ph.D., to Board of Directors | Press release | GlobeNewswire | -2.33% | -3.20% | |
| Form 8-K Vaxart, Inc. For: Apr 20 | SEC filing · Form 8-K | SEC EDGAR | +1.17% | -1.66% | |
| Form 8-K Vaxart, Inc. For: Apr 16 | SEC filing · Form 8-K | SEC EDGAR | +1.65% | +3.02% | |
| Vaxart Announces Share Purchase Agreement for up to $25 Million with Lincoln Park Capital | Press release | GlobeNewswire | +1.65% | +3.02% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the VXRT section they belong to.
Where else VXRT is measured.
VXRT earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| REGENERX BIOPHARMS INC (RGRX) | 343 | 0.00% | 36% |
| Allena Pharmaceuticals, Inc. (ALNA) | 342 | 0.00% | 41% |
| Brookdale Senior Living Inc. (BKD) | 340 | +0.36% | 62% |
| Lexicon Pharmaceuticals, Inc. (LXRX) | 340 | +0.25% | 51% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Healthcare names, measured the same way →
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How the numbers are made.
How is Vaxart, Inc.'s median reaction calculated?
Every labeled VXRT news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 342 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 42% of VXRT's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-08-31.
Does VXRT's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.