AltimmuneALT
13F holders, Q1 2026 (March 31)173holders −10
25new positions
34sold out
6famous investors
$3.08avg. 13F price*
At the end of Q1 2026, 173 institutions reported holding Altimmune Inc. (ALT) in their 13F filings, down 10 from Q4 2025. 25 opened new positions and 34 sold out. The largest holders were BlackRock, Inc. ($39.4M), State Street Corp. ($22.0M) and Vanguard Capital Management LLC ($17.4M). 6 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Steve Cohen (0.0% of Point72 Asset Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Altimmune Inc.
- CUSIP
- 02155H200
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 25 | $12.0M |
| Exits | 34 | $13.5M |
All 13F filers, Q4 2025 → Q1 2026: 21,772,185 shares bought and 9,124,627 shares sold, net +12,647,558 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 173 holders
| BlackRock, Inc. | 0.00% | Add +31.9% | 12,795,277 | $39.4M |
| State Street Corp. | 0.00% | Add +39.6% | 7,145,550 | $22.0M |
| Vanguard Capital Management LLC | 0.00% | — | 5,658,049 | $17.4M |
| Vanguard Portfolio Management LLC | 0.00% | — | 5,382,002 | $16.6M |
| Marshall Wace, LLP | 0.01% | Add +335.4% | 4,017,901 | $12.4M |
| Millennium Management | 0.01% | Add +1471.1% | 3,258,191 | $10.0M |
| Geode Capital Management, LLC | 0.00% | Add +35.5% | 3,107,096 | $9.6M |
| Alyeska Investment Group, L.P. | 0.02% | New | 2,644,600 | $8.1M |
| Two Sigma Investments, LP | 0.01% | Add +95.8% | 2,478,900 | $7.6M |
| Nuveen, LLC | 0.00% | Add +87.6% | 2,334,601 | $7.2M |
| Goldman Sachs Group Inc. | 0.00% | Add +0.1% | 1,350,649 | $4.2M |
| Susquehanna International Group, LLP | 0.01% | Reduce -3.1% | 1,325,956 | $4.1M |
| Dimensional Fund Advisors LP | 0.00% | Add +268.7% | 1,045,926 | $3.2M |
| Northern Trust Corp. | 0.00% | Add +39.2% | 996,721 | $3.1M |
| UBS Group AG | 0.00% | Add +40.9% | 904,768 | $2.8M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 869,318 | $2.7M |
| Morgan Stanley | 0.00% | Reduce -43.0% | 775,258 | $2.4M |
| D. E. Shaw & Co. | 0.00% | Reduce -45.9% | 727,001 | $2.2M |
| FMR LLC | 0.00% | Add +19.5% | 673,964 | $2.1M |
| Tang Capital Management LLC | 0.10% | Reduce -68.8% | 666,022 | $2.1M |
| Point72 Asset Management | 0.00% | New | 665,289 | $2.0M |
| Schroder Investment Management Group | 0.00% | Add +42.4% | 667,837 | $1.9M |
| Bank of America Corp. | 0.00% | Add +48.6% | 570,203 | $1.8M |
| Citadel Advisors | 0.00% | Reduce -66.5% | 448,873 | $1.4M |
| BNP Paribas Financial Markets | 0.00% | Add +145.4% | 435,078 | $1.3M |
| Bank of New York Mellon Corp | 0.00% | Add +16.7% | 413,503 | $1.3M |
| Beirne Wealth Consulting Services, LLC | 0.36% | Add +9.4% | 411,858 | $1.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +24.0% | 351,681 | $1.1M |
| Steward Partners Investment Advisory, LLC | 0.00% | Add +2.6% | 251,781 | $775K |
| Wellington Management Group LLP | 0.00% | Reduce -3.5% | 248,158 | $764K |
| Mangrove Partners Im, LLC | 0.06% | New | 239,280 | $737K |
| Baird Financial Group, Inc. | 0.00% | Add +98.9% | 237,522 | $732K |
| Brown Wealth Management, LLC | 0.19% | Reduce -8.7% | 236,136 | $727K |
| Rafferty Asset Management, LLC | 0.00% | Add +18.1% | 231,271 | $712K |
| Invesco Ltd. | 0.00% | Add +6.1% | 227,857 | $702K |
| Hennion & Walsh Asset Management, Inc. | 0.02% | Reduce -5.9% | 201,989 | $622K |
| Barclays PLC | 0.00% | Reduce -51.9% | 192,871 | $594K |
| Janney Montgomery Scott LLC | 0.00% | Add +68.2% | 172,610 | $532K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -11.6% | 160,374 | $494K |
| Knoll Capital Management, LLC | 0.26% | Reduce -85.7% | 160,000 | $493K |
| Rhumbline Advisers | 0.00% | Add +28.1% | 155,671 | $479K |
| HSBC Holdings PLC | 0.00% | Add +16.8% | 154,365 | $476K |
| Stifel Financial Corp. | 0.00% | Add +9.1% | 134,616 | $415K |
| Wealth Effects LLC | 0.14% | Add +18.1% | 131,950 | $406K |
| Man Group plc | 0.00% | Add +585.7% | 129,846 | $400K |
| GMO | 0.00% | Reduce -26.8% | 126,389 | $389K |
| Deutsche Bank AG | 0.00% | Add +55.8% | 124,516 | $384K |
| JPMorgan Chase & Co. | 0.00% | Add +22.0% | 127,498 | $367K |
| Engineers Gate Manager LP | 0.00% | Add +33.1% | 116,112 | $358K |
| Jefferies Financial Group Inc. | 0.00% | Reduce -30.3% | 110,000 | $339K |
| Alps Advisors Inc. | 0.00% | Add +23.6% | 105,881 | $326K |
| LPL Financial LLC | 0.00% | Add +113.4% | 103,756 | $320K |
| Silvercrest Asset Management Group LLC | 0.00% | No change | 103,500 | $319K |
| Summit Financial Wealth Advisors, LLC | 0.05% | No change | 103,288 | $318K |
| Profund Advisors LLC | 0.01% | Add +42.7% | 103,141 | $318K |
| Nomura Asset Management International Inc. | 0.00% | No change | 100,000 | $308K |
| Wells Fargo & Company | 0.00% | Reduce -32.1% | 95,907 | $295K |
| T. Rowe Price Associates Inc. | 0.00% | Add +85.5% | 92,512 | $285K |
| AQR Capital Management | 0.00% | Add +304.1% | 85,454 | $263K |
| Alliancebernstein L.P. | 0.00% | No change | 71,760 | $259K |
| Brevan Howard Capital Management LP | 0.00% | Reduce -31.3% | 78,403 | $241K |
| Kingswood Wealth Advisors, LLC | 0.01% | Add +112.5% | 76,500 | $236K |
| Citigroup Inc. | 0.00% | Add +169.5% | 76,327 | $235K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +47.0% | 77,292 | $235K |
| Caption Management, LLC | 0.01% | No change | 74,438 | $229K |
| MetLife Investment Management, LLC | 0.00% | Add +89.1% | 72,213 | $222K |
| Ameriprise Financial Inc. | 0.00% | Reduce -2.5% | 71,968 | $222K |
| Virtu Financial LLC | 0.01% | Add +20.6% | 70,540 | $217K |
| Leonteq Securities AG | 0.01% | Add +6400.0% | 65,000 | $200K |
| American Century Companies Inc. | 0.00% | New | 62,909 | $194K |
| PVG Asset Management Corp. | 0.10% | New | 66,120 | $175K |
| SG Americas Securities, LLC | 0.00% | Add +426.0% | 55,625 | $171K |
| Raymond James Financial Inc. | 0.00% | Reduce -3.7% | 53,796 | $166K |
| Canada Pension Plan Investment Board | 0.00% | Add +77.7% | 53,300 | $164K |
| Virtus Investment Advisers, LLC | 0.04% | Add +2.5% | 51,743 | $159K |
| ExodusPoint Capital Management, LP | 0.00% | Add +307.8% | 48,619 | $150K |
| Axq Capital, LP | 0.02% | Add +85.8% | 47,752 | $147K |
| Rockefeller Capital Management L.P. | 0.00% | Add +7.4% | 46,370 | $143K |
| Vanguard Global Advisers, LLC | 0.00% | — | 42,826 | $132K |
| Creative Planning | 0.00% | Reduce -16.3% | 39,229 | $121K |
| Kovack Advisors, Inc. | 0.01% | Add +2.9% | 36,250 | $112K |
| EverSource Wealth Advisors, LLC | 0.00% | Add +101.6% | 35,650 | $110K |
| Cetera Investment Advisers | 0.00% | Add +19.4% | 35,453 | $109K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | Add +50.3% | 35,433 | $109K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +26.0% | 34,763 | $107K |
| MML Investors Services, LLC | 0.00% | No change | 34,550 | $106K |
| Intech Investment Management LLC | 0.00% | Reduce -41.5% | 30,761 | $95K |
| Corient Private Wealth LP | 0.00% | New | 30,553 | $94K |
| HUB Investment Partners, LLC | 0.00% | Add +112.5% | 30,218 | $93K |
| E Fund Management Co., Ltd. | 0.00% | — | 29,072 | $90K |
| Blair William & Co. | 0.00% | Reduce -50.0% | 28,223 | $87K |
| Farallon Capital Management, L.L.C. | 0.00% | No change | 27,600 | $85K |
| Voleon Capital Management LP | 0.00% | Reduce -42.3% | 27,142 | $84K |
| Concurrent Investment Advisors, LLC | 0.00% | No change | 26,508 | $82K |
| Jones Financial Companies LLLP | 0.00% | Add +106.5% | 25,869 | $78K |
| Royal Bank of Canada | 0.00% | Reduce -7.7% | 25,317 | $78K |
| ProShare Advisors LLC | 0.00% | Add +17.8% | 24,523 | $76K |
| Polymer Capital Management (US) LLC | 0.01% | New | 23,999 | $74K |
| Simplex Trading, LLC | 0.00% | New | 22,841 | $70K |
| China Universal Asset Management Co., Ltd. | 0.01% | Add +30.7% | 22,223 | $68K |
"% of holder's portfolio" is ALT's weight in each manager's 13F, not the share of Altimmune Inc. the manager owns.