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Altimmune (ALT) Institutional Ownership

Altimmune logo
$3.19 -0.22 (-6.45%)
Closing price 09/23/2026 04:00 PM Eastern
Extended Trading
$3.16 -0.02 (-0.78%)
As of 07:01 AM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Altimmune (NASDAQ:ALT)

Current
Institutional Ownership
Percentage
78.05%
Number of
Institutional Buyers
(last 12 months)
90
Total
Institutional Inflows
(last 12 months)
$50.87M
Number of
Institutional Sellers
(last 12 months)
26
Total
Institutional Outflows
(last 12 months)
$7.99M
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ALT Institutional Buying and Selling by Quarter

Altimmune Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/9/2026 Sequoia Financial Advisors LLC32,285$98K0.0%N/A0.017%
9/9/2026 WINTON GROUP Ltd16,100$49K0.0%N/A0.008%
9/9/2026 Engineers Gate Manager LP38,037$116K0.0%-67.2%0.020%
9/9/2026 Squarepoint Ops LLC202,380$615K0.0%+1,016.5%0.104%
8/27/2026 Corient Private Wealth LP54,226$165K0.0%+77.5%0.028%
8/22/2026 Syon Capital LLC17,118$52K0.0%N/A0.009%
8/21/2026 AXQ Capital LP56,810$173K0.0%+19.0%0.029%
8/19/2026 Wellington Management Group LLP420,300$1.28M0.0%+69.4%0.216%
8/6/2026 Bank of New York Mellon Corp689,713$2.10M0.0%N/A0.355%
7/9/2026 Hennion & Walsh Asset Management Inc.518,198$1.58M0.0%+156.5%0.266%
6/16/2026 PVG Asset Management Corp66,120$204K0.1%N/A0.034%
5/19/2026 Bank of America Corp DE570,203$1.76M0.0%+48.6%0.438%
5/18/2026 EverSource Wealth Advisors LLC35,650$110K0.0%+101.6%0.027%
5/16/2026 The Manufacturers Life Insurance Company34,763$107K0.0%+26.0%0.027%
5/16/2026 Quantinno Capital Management LP10,636$33K0.0%N/A0.008%
5/13/2026 Cetera Investment Advisers35,453$109K0.0%+19.4%0.027%
5/7/2026 Dimensional Fund Advisors LP1,045,926$3.22M0.0%+268.7%0.804%
5/5/2026 Bank of New York Mellon Corp413,503$1.27M0.0%+16.7%0.318%
5/1/2026 Beirne Wealth Consulting Services LLC411,858$1.27M0.4%+9.4%0.317%
4/30/2026 Hsbc Holdings PLC154,365$476K0.0%+16.7%0.119%
4/27/2026 PFG Investments LLC13,500$42K0.0%N/A0.010%
4/27/2026 Leonteq Securities AG65,000$200K0.0%+6,400.0%0.050%
4/23/2026 North Star Investment Management Corp.17,000$52K0.0%+112.5%0.013%
4/22/2026 Janney Montgomery Scott LLC172,610$532K0.0%+68.2%0.133%
4/21/2026 Wealth Effects LLC131,950$406K0.1%+18.1%0.101%
4/16/2026 SG Americas Securities LLC55,625$171K0.0%+426.0%0.043%
3/20/2026 Hsbc Holdings PLC132,221$474K0.0%+80.8%0.102%
3/17/2026 Rockefeller Capital Management L.P.43,167$156K0.0%+79,838.9%0.033%
2/23/2026 Virtu Financial LLC58,477$211K0.0%+21.7%0.052%
2/19/2026 Invesco Ltd.214,824$776K0.0%+32.7%0.190%
2/18/2026 Vines Capital Management LLC17,884$65K0.1%N/A0.016%
2/18/2026 Virtus Investment Advisers LLC50,482$182K0.0%+217.2%0.045%
2/18/2026 Wellington Management Group LLP257,271$929K0.0%-2.8%0.228%
2/18/2026 Susquehanna Portfolio Strategies LLC135,170$488K0.0%-27.0%0.120%
2/18/2026 Quadrature Capital Ltd10,101$36K0.0%N/A0.009%
2/18/2026 Millennium Management LLC207,383$749K0.0%-43.6%0.184%
2/18/2026 Man Group plc18,936$68K0.0%N/A0.017%
2/18/2026 Engineers Gate Manager LP87,264$315K0.0%+112.6%0.077%
2/18/2026 Balyasny Asset Management L.P.60,109$217K0.0%N/A0.053%
2/17/2026 Schonfeld Strategic Advisors LLC13,021$47K0.0%N/A0.012%
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2/17/2026 AQR Capital Management LLC21,147$76K0.0%N/A0.019%
2/17/2026 Cetera Investment Advisers29,687$107K0.0%+46.9%0.026%
2/17/2026Northeast Financial Group Inc.13,393$48K0.0%N/A0.012%
2/17/2026 EFG International AG16,500$60K0.0%N/A0.015%
2/17/2026 Kovack Advisors Inc.35,215$127K0.0%N/A0.031%
2/17/2026 Jump Financial LLC242,017$874K0.0%+109.0%0.214%
2/17/2026 Price T Rowe Associates Inc. MD49,879$181K0.0%+20.2%0.044%
2/17/2026 Soviero Asset Management LP400,000$1.44M0.7%N/A0.355%
2/17/2026 Advisory Services Network LLC15,160$55K0.0%+69.2%0.013%
2/17/2026 &PARTNERS15,035$54K0.0%N/A0.013%
2/17/2026 ExodusPoint Capital Management LP11,921$43K0.0%-93.3%0.011%
2/17/2026 Royal Bank of Canada27,414$99K0.0%-58.9%0.024%
2/17/2026 Blair William & Co. IL56,434$204K0.0%N/A0.050%
2/16/2026 Squarepoint Ops LLC34,949$126K0.0%-94.0%0.031%
2/16/2026 Arax Advisory Partners8,165$29K0.0%+99.7%0.007%
2/16/2026 Barclays PLC400,595$1.45M0.0%+17.7%0.355%
2/13/2026 CreativeOne Wealth LLC10,500$38K0.0%N/A0.009%
2/13/2026 Marshall Wace LLP922,777$3.33M0.0%N/A0.818%
2/13/2026 Stifel Financial Corp123,416$446K0.0%+104.3%0.109%
2/13/2026 Schroder Investment Management Group469,013$1.69M0.0%N/A0.416%
2/13/2026 Rafferty Asset Management LLC195,766$707K0.0%+25.3%0.174%
2/13/2026 Charles Schwab Investment Management Inc.283,669$1.02M0.0%+38.7%0.251%
2/13/2026 State Street Corp5,119,703$18.48M0.0%+42.2%4.538%
2/13/2026 Vontobel Holding Ltd.15,000$54K0.0%N/A0.013%
2/13/2026 Martingale Asset Management L P14,355$52K0.0%N/A0.013%
2/13/2026 Caitong International Asset Management Co. Ltd12,322$44K0.1%N/A0.011%
2/13/2026 Wells Fargo & Company MN141,282$510K0.0%+52.1%0.125%
2/12/2026 DRW Securities LLC22,469$81K0.0%N/A0.020%
2/12/2026 MetLife Investment Management LLC38,193$138K0.0%-14.2%0.034%
2/12/2026 Commonwealth Equity Services LLC181,483$655K0.0%+4.2%0.161%
2/12/2026 Dimensional Fund Advisors LP283,703$1.02M0.0%-4.7%0.251%
2/12/2026 Steward Partners Investment Advisory LLC245,393$886K0.0%+11.9%0.217%
2/12/2026 Alps Advisors Inc.85,677$309K0.0%N/A0.076%
2/12/2026 Kovack Advisors Inc.35,215$127K0.0%N/A0.031%
2/12/2026 Nuveen LLC1,244,211$4.49M0.0%+514.9%1.103%
2/11/2026 Janney Montgomery Scott LLC102,610$370K0.0%+75.2%0.091%
2/11/2026 Deutsche Bank AG79,940$289K0.0%+4.0%0.071%
2/11/2026 Fox Run Management L.L.C.30,603$110K0.0%N/A0.027%
2/11/2026 LPL Financial LLC48,626$176K0.0%-21.0%0.043%
2/11/2026 Los Angeles Capital Management LLC128,529$464K0.0%N/A0.114%
2/10/2026 Goldman Sachs Group Inc.1,349,293$4.87M0.0%+140.0%1.196%
2/10/2026 AXQ Capital LP25,701$93K0.0%+25.8%0.023%
2/10/2026 Intech Investment Management LLC52,557$190K0.0%+36.0%0.047%
2/9/2026 Geode Capital Management LLC2,292,410$8.28M0.0%+13.6%2.032%
2/6/2026 Keudell Morrison Wealth Management18,500$67K0.0%N/A0.016%
2/6/2026 Brown Wealth Management LLC258,673$934K0.2%+10.7%0.229%
2/6/2026 ProShare Advisors LLC20,816$75K0.0%+21.9%0.018%
2/3/2026 SBI Securities Co. Ltd.8,837$32K0.0%+27.9%0.008%
2/2/2026 PKS Advisory Services LLC15,100$55K0.0%N/A0.013%
1/29/2026 Beirne Wealth Consulting Services LLC376,458$1.36M0.4%-8.3%0.361%
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1/29/2026 Concurrent Investment Advisors LLC26,508$96K0.0%+10.4%0.025%
1/28/2026 Kingswood Wealth Advisors LLC36,000$130K0.0%+133.8%0.035%
1/27/2026 Summit Financial Wealth Advisors LLC103,288$373K0.1%+7.3%0.099%
1/26/2026 Wealth Effects LLC111,750$403K0.1%+86.7%0.107%
1/14/2026 Hennion & Walsh Asset Management Inc.214,632$775K0.0%+15.7%0.206%
1/9/2026 SG Americas Securities LLC10,575$38K0.0%-41.4%0.010%
1/1/2026 JPMorgan Chase & Co.99,191$374K0.0%-17.7%0.095%
11/18/2025 Advisory Services Network LLC8,960$34K0.0%-44.3%0.009%
11/17/2025Sherbrooke Park Advisers LLC15,904$60K0.0%N/A0.015%
11/17/2025 Sig Brokerage LP34,502$130K0.0%N/A0.033%


ALT Institutional Ownership - Frequently Asked Questions

During the previous two years, 156 institutional investors and hedge funds held shares of Altimmune. The most heavily invested institutionals were Vanguard Group Inc. ($24.03M), State Street Corp ($18.48M), Geode Capital Management LLC ($8.28M), Two Sigma Investments LP ($7.53M), Bellevue Group AG ($6.82M), Goldman Sachs Group Inc. ($4.87M), and Northern Trust Corp ($4.80M).Learn more on Altimmune's institutional investors.

78.05% of Altimmune's stock is owned by institutional investors. Learn more on ALT's institutional investor holdings.

Of the 143 institutional investors that purchased Altimmune's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Two Sigma Investments LP ($1.71M), State Street Corp ($1.52M), Ameriprise Financial Inc. ($1.38M), Nuveen LLC ($1.31M), Vanguard Group Inc. ($1.21M), Marshall Wace LLP ($988.29K), and Federated Hermes Inc. ($915.46K).

Institutional investors have bought a total of 14,334,574 shares in the last 24 months. This purchase volume represents approximately $50.87M in transactions.

Of the 26 institutional investors that sold Altimmune's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Squarepoint Ops LLC ($549.75K), Bank of America Corp DE ($395.58K), Virtu Financial LLC ($219.71K), ExodusPoint Capital Management LP ($166.26K), Dimensional Fund Advisors LP ($163.77K), Millennium Management LLC ($160.20K), and Intech Investment Management LLC ($106.25K).

Institutional investors have sold a total of 2,179,102 shares in the last 24 months. This volume of shares sold represents approximately $7.99M in transactions.


Related Companies

Institutional ownership data for NASDAQ:ALT is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/9/2026. New 13F filings are added each quarter as they're published.
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