Vault-13

VAXART INC VXRT

COM NEW · Common Stock · CUSIP 92243A200 · ISIN US92243A2006

American biotechnology company based in San Francisco

99 institutional holders +6 vs Q1 2025
23,038,49923.0m shares reported held*
10.1% of all shares outstanding*
$10.4mreported value*
17 new 20 added 18 reduced 10 sold out net sold ≈ $1.9m (-4.3m shares)

* 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

050100150Q3 22: 143Q4 22: 134Q1 23: 110Q2 23: 112Q3 23: 97Q4 23: 88Q1 24: 105Q2 24: 101Q3 24: 101Q4 24: 94Q1 25: 93Q2 25: 9999Q3 22Q2 23Q1 24Q4 24Q2 25
Numbers
QuarterHolders
Q3 2022143
Q4 2022134
Q1 2023110
Q2 2023112
Q3 202397
Q4 202388
Q1 2024105
Q2 2024101
Q3 2024101
Q4 202494
Q1 202593
Q2 202599

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q3 23: 26 bought or addedQ3 23: 53 cut or sold outQ4 23: 29 bought or addedQ4 23: 36 cut or sold outQ4 23Q1 24: 55 bought or addedQ1 24: 30 cut or sold outQ2 24: 43 bought or addedQ2 24: 46 cut or sold outQ2 24Q3 24: 31 bought or addedQ3 24: 43 cut or sold outQ4 24: 31 bought or addedQ4 24: 42 cut or sold outQ4 24Q1 25: 26 bought or addedQ1 25: 35 cut or sold outQ2 25: 37 bought or addedQ2 25: 28 cut or sold outQ2 25
Numbers
QuarterBought or addedCut or sold out
Q3 20232653
Q4 20232936
Q1 20245530
Q2 20244346
Q3 20243143
Q4 20243142
Q1 20252635
Q2 20253728

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$100k$200k$300k$400kQ3 24 calls: $301.4kQ3 24 puts: $182.9kQ3 24P/C 0.61Q4 24 calls: $132.6kQ4 24 puts: $116.1kQ4 24P/C 0.88Q1 25 calls: $37.5kQ1 25 puts: $33.5kQ1 25P/C 0.89Q2 25 calls: $34.6kQ2 25 puts: $3.1kQ2 25P/C 0.09
Numbers
QuarterCallsPutsP/C
Q3 2024$301.4k$182.9k0.61
Q4 2024$132.6k$116.1k0.88
Q1 2025$37.5k$33.5k0.89
Q2 2025$34.6k$3.1k0.09

Biggest buyers

MARSHALL WACE, LLP New +1,763,882+1.8m
RENAISSANCE TECHNOLOGIES LLC New +597,443+597.4k
ROYAL BANK OF CANADA Added +447,126+447.1k
UBS Group AG Added +266,552+266.6k
HRT FINANCIAL LP New +178,883+178.9k
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added +111,872+111.9k
TWO SIGMA SECURITIES, LLC New +107,781+107.8k
TWO SIGMA INVESTMENTS, LP Added +93,105+93.1k
Creative Planning New +73,225+73.2k
STATE STREET CORP Added +60,874+60.9k

Biggest sellers

Sio Capital Management, LLC Sold out -5,583,448-5.6m
MILLENNIUM MANAGEMENT LLC Reduced -943,525-943.5k
SILVERARC CAPITAL MANAGEMENT, LLC Sold out -683,825-683.8k
Squarepoint Ops LLC Reduced -357,623-357.6k
GEODE CAPITAL MANAGEMENT, LLC Reduced -333,748-333.7k
BANK OF AMERICA CORP /DE/ Reduced -99,865-99.9k
Graham Capital Management, L.P. Sold out -89,541-89.5k
MORGAN STANLEY Reduced -32,981-33.0k
JANE STREET GROUP, LLC Sold out -30,516-30.5k
Invesco Ltd. Reduced -27,660-27.7k

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)

BuyingSelling
101Q3 23: 0 buyingQ3 23: 0 sellingQ4 23: 0 buyingQ4 23: 0 sellingQ4 23Q1 24: 0 buyingQ1 24: 0 sellingQ2 24: 1 buyingQ2 24: 0 sellingQ2 24Q3 24: 0 buyingQ3 24: 0 sellingQ4 24: 0 buyingQ4 24: 0 sellingQ4 24Q1 25: 0 buyingQ1 25: 0 sellingQ2 25: 1 buyingQ2 25: 0 sellingQ2 25
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q3 20230—0——
Q4 20230—0——
Q1 20240—0——
Q2 20241$13.6k0——
Q3 20240—0——
Q4 20240—0——
Q1 20250—0——
Q2 20251$49.0k0——
DateInsiderTradeSharesPrice ValueTheir holding
2025-05-19 Lo Steven President, Chief Exec Officer, director · By The Lo Family Trust Bought 100,000 $0.49 $49.0k100.0k shares new

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

#ManagerLocationShares Value% of their portfolioChangeShares change
1 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 10,417,63910.4m $4.7m $4.7m 0.00% Added +48.7k +48,715
2 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 2,326,3712.3m $1.1m $1.1m 0.00% Reduced -333.7k -333,748
3 BlackRock, Inc. 0.00% of their portfolio New York, NY 1,774,3461.8m $802.0k $802.0k 0.00% Reduced -9.9k -9,883
4 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 1,763,8821.8m $793.7k $793.7k 0.00% New
5 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 851,119851.1k $384.7k $384.7k 0.00% Added +60.9k +60,874
6 UBS Group AG 0.00% of their portfolio ZURICH, V8 825,758825.8k $373.2k $373.2k 0.00% Added +266.6k +266,552
7 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 597,443597.4k $270.0k $270.0k 0.00% New
8 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 447,732447.7k $202.0k $202.0k 0.00% Added +447.1k +447,126
9 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 446,852446.9k $202.0k $202.0k 0.00% Reduced -357.6k -357,623
10 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 409,181409.2k $184.9k $184.9k 0.00% Reduced -1 -1
11 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 236,166236.2k $106.7k $106.7k 0.00% Added +34.1k +34,075
12 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 232,574232.6k $105.1k $105.1k 0.00% Added +111.9k +111,872
13 IHT Wealth Management, LLC 0.00% of their portfolio Chicago, IL 229,451229.5k $103.7k $103.7k 0.00% Added +12.1k +12,068
14 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 181,047181.0k $81.8k $81.8k 0.00% Reduced -33.0k -32,981
15 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 178,883178.9k $80.0k $80.0k 0.00% New
16 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 153,847153.8k $69.5k $69.5k 0.00% Added +300 +300
17 Virtu Financial LLC 0.00% of their portfolio New York, NY 146,710146.7k $66.0k $66.0k 0.00% Added +8.5k +8,474
18 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 118,706118.7k $53.7k $53.7k 0.00% Reduced -27.7k -27,660
19 TWO SIGMA SECURITIES, LLC 0.01% of their portfolio NEW YORK, NY 107,781107.8k $48.7k $48.7k 0.01% New
20 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 106,929106.9k $48.3k $48.3k 0.00% Added +93.1k +93,105
21 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 97,40797.4k $44.0k $44.0k 0.00% Added +21.3k +21,251
22 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 75,49175.5k $34.1k $34.1k 0.00% Unchanged
23 HBK Sorce Advisory LLC 0.00% of their portfolio ERIE, PA 75,11875.1k $34.0k $34.0k 0.00% Unchanged
24 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 73,22573.2k $33.1k $33.1k 0.00% New
25 Curi Capital, LLC 0.00% of their portfolio CHICAGO, IL 65,51565.5k $29.6k $29.6k 0.00% Reduced -833 -833
26 Beacon Capital Management, LLC 0.00% of their portfolio FRANKLIN, TN 60,31460.3k $27.3k $27.3k 0.00% Unchanged
27 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 49,92149.9k $22.6k $22.6k 0.00% Reduced -11.0k -11,034
28 GSA CAPITAL PARTNERS LLP 0.00% of their portfolio LONDON, X0 48,54848.5k $22.0k $22.0k 0.00% New
29 Bernardo Wealth Planning LLC 0.00% of their portfolio HARLEYSVILLE, PA 45,96046.0k $21.0k $21.0k 0.00% Added +16.7k +16,710
30 LMR Partners LLP 0.00% of their portfolio LONDON, X0 43,08143.1k $19.5k $19.5k 0.00% Unchanged
31 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 41,04341.0k $18.6k $18.6k 0.00% Added +1.9k +1,899
32 OPPENHEIMER & CO INC 0.00% of their portfolio NEW YORK, NY 37,95038.0k $17.2k $17.2k 0.00% New
33 Sequoia Financial Advisors, LLC 0.00% of their portfolio Akron, OH 37,00037.0k $16.7k $16.7k 0.00% Reduced -26.6k -26,613
34 PRUDENTIAL FINANCIAL INC 0.00% of their portfolio NEWARK, NJ 31,10031.1k $14.1k $14.1k 0.00% Added +5.2k +5,200
35 KESTRA PRIVATE WEALTH SERVICES, LLC 0.00% of their portfolio AUSTIN, TX 30,26830.3k $13.7k $13.7k 0.00% Unchanged
36 Manhattan West Asset Management, LLC 0.00% of their portfolio Los Angeles, CA 30,25630.3k $13.7k $13.7k 0.00% New
37 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 26,49926.5k $12.0k $12.0k 0.00% Reduced -644 -644
38 Cascade Wealth Advisors, Inc 0.01% of their portfolio WENATCHEE, WA 25,03525.0k $9.5k $9.5k 0.01% New
39 LVM CAPITAL MANAGEMENT LTD/MI 0.00% of their portfolio PORTAGE, MI 25,00025.0k $11.0k $11.0k 0.00% Unchanged
40 Activest Wealth Management 0.00% of their portfolio AVENTURA, FL 25,00025.0k $11.3k $11.3k 0.00% Unchanged
41 Breakwater Capital Group 0.00% of their portfolio PARAMUS, NJ 24,00024.0k $10.8k $10.8k 0.00% Unchanged
42 XTX Topco Ltd 0.00% of their portfolio LONDON, X0 23,89423.9k $10.8k $10.8k 0.00% New
43 PFG Investments, LLC 0.00% of their portfolio WOODBURY, NY 23,88023.9k $10.8k $10.8k 0.00% Unchanged
44 STIFEL FINANCIAL CORP 0.00% of their portfolio ST. LOUIS, MO 22,09022.1k $10.0k $10.0k 0.00% Reduced -500 -500
45 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 21,77621.8k $9.8k $9.8k 0.00% Reduced -99.9k -99,865
46 Heritage Wealth Advisors 0.00% of their portfolio RICHMOND, VA 21,48421.5k $9.7k $9.7k 0.00% Unchanged
47 Fi3 FINANCIAL ADVISORS, LLC 0.00% of their portfolio INDIANAPOLIS, IN 21,16321.2k $9.6k $9.6k 0.00% Unchanged
48 KINGSWOOD WEALTH ADVISORS, LLC 0.00% of their portfolio SAN DIEGO, CA 20,00520.0k $9.0k $9.0k 0.00% Unchanged
49 Mesirow Financial Investment Management, Inc. 0.00% of their portfolio CHICAGO, IL 20,00020.0k $9.0k $9.0k 0.00% Unchanged
50 Corient Private Wealth LP 0.00% of their portfolio MIAMI, FL 19,82519.8k $9.0k $9.0k 0.00% Unchanged
51 HighTower Advisors, LLC 0.00% of their portfolio CHICAGO, IL 17,05117.1k $7.7k $7.7k 0.00% Reduced -12.0k -12,000
52 TRUIST FINANCIAL CORP 0.00% of their portfolio CHARLOTTE, NC 16,00016.0k $7.2k $7.2k 0.00% Unchanged
53 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 15,43515.4k $7.0k $7.0k 0.00% Unchanged
54 Cetera Investment Advisers 0.00% of their portfolio SCHAUMBURG, IL 15,27515.3k $6.9k $6.9k 0.00% Unchanged
55 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 15,12515.1k $6.8k $6.8k 0.00% Unchanged
56 CAPITAL ADVISORY GROUP ADVISORY SERVICES, LLC 0.00% of their portfolio Phoenix, AZ 15,00015.0k $6.8k $6.8k 0.00% Unchanged
57 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 14,59114.6k $6.6k $6.6k 0.00% Added +1 +1
58 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 12,89212.9k $5.0k $5.0k 0.00% Reduced -8.0k -7,995
59 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 12,34112.3k $5.6k $5.6k 0.00% Reduced -943.5k -943,525
60 Ausdal Financial Partners, Inc. 0.00% of their portfolio Davenport, IA 12,00712.0k $5.4k $5.4k 0.00% Unchanged
61 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 11,80611.8k $5.3k $5.3k 0.00% Added +4.2k +4,155
62 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 11,78511.8k $5.3k $5.3k 0.00% New
63 Focus Partners Wealth 0.00% of their portfolio ST LOUIS, MO 11,00011.0k $5.0k $5.0k 0.00% Unchanged
64 EDMOND DE ROTHSCHILD HOLDING S.A. 0.00% of their portfolio CHAMBESY, V8 11,00011.0k $5.0k $5.0k 0.00% Unchanged
65 Engineers Gate Manager LP 0.00% of their portfolio NEW YORK, NY 10,90110.9k $4.9k $4.9k 0.00% New
66 SG Americas Securities, LLC 0.00% of their portfolio NEW YORK, NY 10,57510.6k $5.0k $5.0k 0.00% New
67 WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio PLYMOUTH, MN 10,40010.4k $4.4k $4.4k 0.00% Added +400 +400
68 Red Door Wealth Management, LLC 0.00% of their portfolio Memphis, TN 10,10010.1k $4.6k $4.6k 0.00% Unchanged
69 Fisher Asset Management, LLC 0.00% of their portfolio PLANO, TX 10,06910.1k $4.6k $4.6k 0.00% Added +69 +69
70 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 10,00010.0k $4.5k $4.5k 0.00% Unchanged
71 Perigon Wealth Management, LLC 0.00% of their portfolio SAN FRANCISCO, CA 10,00010.0k $4.5k $4.5k 0.00% Unchanged
72 Custos Family Office, LLC 0.00% of their portfolio AUSTIN, TX 10,00010.0k $4.5k $4.5k 0.00% New
73 Carnegie Lake Advisors LLC 0.00% of their portfolio PRINCETON, NJ 10,00010.0k $5.0k $5.0k 0.00% Unchanged
74 Leonteq Securities AG 0.00% of their portfolio ZURICH, V8 7,9998.0k $3.6k $3.6k 0.00% Unchanged
75 HANTZ FINANCIAL SERVICES, INC. 0.00% of their portfolio SOUTHFIELD, MI 7,4007.4k $3.0k $3.0k 0.00% Unchanged
76 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 6,0156.0k $2.7k $2.7k 0.00% Reduced -1.0k -1,035
77 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 3,6583.7k $1.7k $1.7k 0.00% Reduced -1.0k -1,000
78 Parallel Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 3,0003.0k $1.4k $1.4k 0.00% Unchanged
79 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 2,5422.5k $1.1k $1.1k 0.00% Added +66 +66
80 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 2,2142.2k $1.0k $1.0k 0.00% Unchanged
81 CALDWELL SUTTER CAPITAL, INC. 0.00% of their portfolio SAUSALITO, CA 2,0002.0k $904 $904 0.00% Unchanged
82 ORG Partners LLC 0.00% of their portfolio ROANOKE, IN 2,0002.0k $919 $919 0.00% Reduced -6.2k -6,250
83 MJT & Associates Financial Advisory Group, Inc. 0.00% of their portfolio MONTEVIDEO, MN 1,5001.5k $678 $678 0.00% Unchanged
84 MAI Capital Management 0.00% of their portfolio INDEPENDENCE, OH 1,0001.0k $452 $452 0.00% Unchanged
85 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 272272 $134 $134 0.00% Added +99 +99
86 FMR LLC 0.00% of their portfolio BOSTON, MA 200200 $90 $90 0.00% New
87 BARTLETT & CO. WEALTH MANAGEMENT LLC 0.00% of their portfolio CINCINNATI, OH 200200 $90 $90 0.00% Unchanged
88 GHP Investment Advisors, Inc. 0.00% of their portfolio Denver, CO 160160 $73 $73 0.00% Unchanged
89 Blue Trust, Inc. 0.00% of their portfolio BRENTWOOD, TN 160160 $72 $72 0.00% New
90 Larson Financial Group LLC 0.00% of their portfolio ST LOUIS, MO 156156 $71 $71 0.00% Unchanged
91 CENTRAL TRUST Co 0.00% of their portfolio JEFFERSON CITY, MO 150150 $68 $68 0.00% Unchanged
92 UMB Bank, n.a. 0.00% of their portfolio Kansas City, MO 100100 $45 $45 0.00% Unchanged
93 Concord Wealth Partners 0.00% of their portfolio ABINGDON, VA 7575 $34 $34 0.00% Unchanged
94 TD Waterhouse Canada Inc. 0.00% of their portfolio TORONTO, A6 3535 $16 $16 0.00% Unchanged
95 Birch Capital Management, LLC 0.00% of their portfolio DALLAS, TX 2222 $10 $10 0.00% Unchanged
96 Archer Investment Corp 0.00% of their portfolio Carmel, IN 1515 $7 $7 0.00% Unchanged
97 JNBA Financial Advisors 0.00% of their portfolio BLOOMINGTON, MN 55 $3 $3 0.00% New
98 SJS Investment Consulting Inc. 0.00% of their portfolio SYLVANIA, OH 33 $2 $2 0.00% Unchanged
99 CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio BIRMINGHAM, AL 00 $0 $0 — Unchanged