VAXART INC VXRT
COM NEW · Common Stock · CUSIP 92243A200 · ISIN US92243A2006
American biotechnology company based in San Francisco
- SectorHealth care
- IndustryBiological Products, (No Diagnostic Substances)
- HeadquartersSouth San Francisco, CA
- Founded2004
- Websitevaxart.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 228.9m as of 2025-08-06, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $0.45. Options: 5 managers hold calls ($34.6k notional), 3 hold puts ($3.1k).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 143 |
| Q4 2022 | 134 |
| Q1 2023 | 110 |
| Q2 2023 | 112 |
| Q3 2023 | 97 |
| Q4 2023 | 88 |
| Q1 2024 | 105 |
| Q2 2024 | 101 |
| Q3 2024 | 101 |
| Q4 2024 | 94 |
| Q1 2025 | 93 |
| Q2 2025 | 99 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 26 | 53 |
| Q4 2023 | 29 | 36 |
| Q1 2024 | 55 | 30 |
| Q2 2024 | 43 | 46 |
| Q3 2024 | 31 | 43 |
| Q4 2024 | 31 | 42 |
| Q1 2025 | 26 | 35 |
| Q2 2025 | 37 | 28 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $301.4k | $182.9k | 0.61 |
| Q4 2024 | $132.6k | $116.1k | 0.88 |
| Q1 2025 | $37.5k | $33.5k | 0.89 |
| Q2 2025 | $34.6k | $3.1k | 0.09 |
Biggest buyers
| MARSHALL WACE, LLP | New | +1.8m |
| RENAISSANCE TECHNOLOGIES LLC | New | +597.4k |
| ROYAL BANK OF CANADA | Added | +447.1k |
| UBS Group AG | Added | +266.6k |
| HRT FINANCIAL LP | New | +178.9k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +111.9k |
| TWO SIGMA SECURITIES, LLC | New | +107.8k |
| TWO SIGMA INVESTMENTS, LP | Added | +93.1k |
| Creative Planning | New | +73.2k |
| STATE STREET CORP | Added | +60.9k |
Biggest sellers
| Sio Capital Management, LLC | Sold out | -5.6m |
| MILLENNIUM MANAGEMENT LLC | Reduced | -943.5k |
| SILVERARC CAPITAL MANAGEMENT, LLC | Sold out | -683.8k |
| Squarepoint Ops LLC | Reduced | -357.6k |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -333.7k |
| BANK OF AMERICA CORP /DE/ | Reduced | -99.9k |
| Graham Capital Management, L.P. | Sold out | -89.5k |
| MORGAN STANLEY | Reduced | -33.0k |
| JANE STREET GROUP, LLC | Sold out | -30.5k |
| Invesco Ltd. | Reduced | -27.7k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $22.7k50.3k shares |
| WOLVERINE TRADING, LLC | New | $7.8k15.8k shares |
| SIMPLEX TRADING, LLC | Reduced | $4.0k9.8k shares |
| GROUP ONE TRADING LLC | Reduced | $45100 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| GROUP ONE TRADING LLC | Reduced | $3.1k6.9k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| SIMPLEX TRADING, LLC | Reduced | $0600 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 1 | $13.6k | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 1 | $49.0k | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-05-19 | Lo Steven President, Chief Exec Officer, director · By The Lo Family Trust | Bought | $49.0k100.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.00% of their portfolio | 10.4m $4.7m | Added +48.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 2.3m $1.1m | Reduced -333.7k |
| BlackRock, Inc. 0.00% of their portfolio | 1.8m $802.0k | Reduced -9.9k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 1.8m $793.7k | New |
| STATE STREET CORP 0.00% of their portfolio | 851.1k $384.7k | Added +60.9k |
| UBS Group AG 0.00% of their portfolio | 825.8k $373.2k | Added +266.6k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 597.4k $270.0k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 447.7k $202.0k | Added +447.1k |
| Squarepoint Ops LLC 0.00% of their portfolio | 446.9k $202.0k | Reduced -357.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 409.2k $184.9k | Reduced -1 |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 236.2k $106.7k | Added +34.1k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 232.6k $105.1k | Added +111.9k |
| IHT Wealth Management, LLC 0.00% of their portfolio | 229.5k $103.7k | Added +12.1k |
| MORGAN STANLEY 0.00% of their portfolio | 181.0k $81.8k | Reduced -33.0k |
| HRT FINANCIAL LP 0.00% of their portfolio | 178.9k $80.0k | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 153.8k $69.5k | Added +300 |
| Virtu Financial LLC 0.00% of their portfolio | 146.7k $66.0k | Added +8.5k |
| Invesco Ltd. 0.00% of their portfolio | 118.7k $53.7k | Reduced -27.7k |
| TWO SIGMA SECURITIES, LLC 0.01% of their portfolio | 107.8k $48.7k | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 106.9k $48.3k | Added +93.1k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 97.4k $44.0k | Added +21.3k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 75.5k $34.1k | Unchanged |
| HBK Sorce Advisory LLC 0.00% of their portfolio | 75.1k $34.0k | Unchanged |
| Creative Planning 0.00% of their portfolio | 73.2k $33.1k | New |
| Curi Capital, LLC 0.00% of their portfolio | 65.5k $29.6k | Reduced -833 |
| Beacon Capital Management, LLC 0.00% of their portfolio | 60.3k $27.3k | Unchanged |
| LPL Financial LLC 0.00% of their portfolio | 49.9k $22.6k | Reduced -11.0k |
| GSA CAPITAL PARTNERS LLP 0.00% of their portfolio | 48.5k $22.0k | New |
| Bernardo Wealth Planning LLC 0.00% of their portfolio | 46.0k $21.0k | Added +16.7k |
| LMR Partners LLP 0.00% of their portfolio | 43.1k $19.5k | Unchanged |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 41.0k $18.6k | Added +1.9k |
| OPPENHEIMER & CO INC 0.00% of their portfolio | 38.0k $17.2k | New |
| Sequoia Financial Advisors, LLC 0.00% of their portfolio | 37.0k $16.7k | Reduced -26.6k |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 31.1k $14.1k | Added +5.2k |
| KESTRA PRIVATE WEALTH SERVICES, LLC 0.00% of their portfolio | 30.3k $13.7k | Unchanged |
| Manhattan West Asset Management, LLC 0.00% of their portfolio | 30.3k $13.7k | New |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 26.5k $12.0k | Reduced -644 |
| Cascade Wealth Advisors, Inc 0.01% of their portfolio | 25.0k $9.5k | New |
| LVM CAPITAL MANAGEMENT LTD/MI 0.00% of their portfolio | 25.0k $11.0k | Unchanged |
| Activest Wealth Management 0.00% of their portfolio | 25.0k $11.3k | Unchanged |
| Breakwater Capital Group 0.00% of their portfolio | 24.0k $10.8k | Unchanged |
| XTX Topco Ltd 0.00% of their portfolio | 23.9k $10.8k | New |
| PFG Investments, LLC 0.00% of their portfolio | 23.9k $10.8k | Unchanged |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 22.1k $10.0k | Reduced -500 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 21.8k $9.8k | Reduced -99.9k |
| Heritage Wealth Advisors 0.00% of their portfolio | 21.5k $9.7k | Unchanged |
| Fi3 FINANCIAL ADVISORS, LLC 0.00% of their portfolio | 21.2k $9.6k | Unchanged |
| KINGSWOOD WEALTH ADVISORS, LLC 0.00% of their portfolio | 20.0k $9.0k | Unchanged |
| Mesirow Financial Investment Management, Inc. 0.00% of their portfolio | 20.0k $9.0k | Unchanged |
| Corient Private Wealth LP 0.00% of their portfolio | 19.8k $9.0k | Unchanged |
| HighTower Advisors, LLC 0.00% of their portfolio | 17.1k $7.7k | Reduced -12.0k |
| TRUIST FINANCIAL CORP 0.00% of their portfolio | 16.0k $7.2k | Unchanged |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 15.4k $7.0k | Unchanged |
| Cetera Investment Advisers 0.00% of their portfolio | 15.3k $6.9k | Unchanged |
| BANK OF MONTREAL /CAN/ 0.00% of their portfolio | 15.1k $6.8k | Unchanged |
| CAPITAL ADVISORY GROUP ADVISORY SERVICES, LLC 0.00% of their portfolio | 15.0k $6.8k | Unchanged |
| Bank of New York Mellon Corp 0.00% of their portfolio | 14.6k $6.6k | Added +1 |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 12.9k $5.0k | Reduced -8.0k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 12.3k $5.6k | Reduced -943.5k |
| Ausdal Financial Partners, Inc. 0.00% of their portfolio | 12.0k $5.4k | Unchanged |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 11.8k $5.3k | Added +4.2k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 11.8k $5.3k | New |
| Focus Partners Wealth 0.00% of their portfolio | 11.0k $5.0k | Unchanged |
| EDMOND DE ROTHSCHILD HOLDING S.A. 0.00% of their portfolio | 11.0k $5.0k | Unchanged |
| Engineers Gate Manager LP 0.00% of their portfolio | 10.9k $4.9k | New |
| SG Americas Securities, LLC 0.00% of their portfolio | 10.6k $5.0k | New |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio | 10.4k $4.4k | Added +400 |
| Red Door Wealth Management, LLC 0.00% of their portfolio | 10.1k $4.6k | Unchanged |
| Fisher Asset Management, LLC 0.00% of their portfolio | 10.1k $4.6k | Added +69 |
| US BANCORP \DE\ 0.00% of their portfolio | 10.0k $4.5k | Unchanged |
| Perigon Wealth Management, LLC 0.00% of their portfolio | 10.0k $4.5k | Unchanged |
| Custos Family Office, LLC 0.00% of their portfolio | 10.0k $4.5k | New |
| Carnegie Lake Advisors LLC 0.00% of their portfolio | 10.0k $5.0k | Unchanged |
| Leonteq Securities AG 0.00% of their portfolio | 8.0k $3.6k | Unchanged |
| HANTZ FINANCIAL SERVICES, INC. 0.00% of their portfolio | 7.4k $3.0k | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 6.0k $2.7k | Reduced -1.0k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 3.7k $1.7k | Reduced -1.0k |
| Parallel Advisors, LLC 0.00% of their portfolio | 3.0k $1.4k | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 2.5k $1.1k | Added +66 |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 2.2k $1.0k | Unchanged |
| CALDWELL SUTTER CAPITAL, INC. 0.00% of their portfolio | 2.0k $904 | Unchanged |
| ORG Partners LLC 0.00% of their portfolio | 2.0k $919 | Reduced -6.2k |
| MJT & Associates Financial Advisory Group, Inc. 0.00% of their portfolio | 1.5k $678 | Unchanged |
| MAI Capital Management 0.00% of their portfolio | 1.0k $452 | Unchanged |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 272 $134 | Added +99 |
| FMR LLC 0.00% of their portfolio | 200 $90 | New |
| BARTLETT & CO. WEALTH MANAGEMENT LLC 0.00% of their portfolio | 200 $90 | Unchanged |
| GHP Investment Advisors, Inc. 0.00% of their portfolio | 160 $73 | Unchanged |
| Blue Trust, Inc. 0.00% of their portfolio | 160 $72 | New |
| Larson Financial Group LLC 0.00% of their portfolio | 156 $71 | Unchanged |
| CENTRAL TRUST Co 0.00% of their portfolio | 150 $68 | Unchanged |
| UMB Bank, n.a. 0.00% of their portfolio | 100 $45 | Unchanged |
| Concord Wealth Partners 0.00% of their portfolio | 75 $34 | Unchanged |
| TD Waterhouse Canada Inc. 0.00% of their portfolio | 35 $16 | Unchanged |
| Birch Capital Management, LLC 0.00% of their portfolio | 22 $10 | Unchanged |
| Archer Investment Corp 0.00% of their portfolio | 15 $7 | Unchanged |
| JNBA Financial Advisors 0.00% of their portfolio | 5 $3 | New |
| SJS Investment Consulting Inc. 0.00% of their portfolio | 3 $2 | Unchanged |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio | 0 $0 | Unchanged |