Altimmune, Inc.
ALT- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001326190
In the last 90 days, Altimmune, Inc. insiders filed 1 open-market purchase and 0 sales; 210 institutions reported holding it in 13F filings for Q2 2026, worth $456.1M in total; Viking Global Investors is the only superinvestor holding it.
13F holders, Q1 2026
Institutional positions in Altimmune, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 173
- −5 vs. Q4 2025
- Shares held
- 69.4M
- +23.8M (+52.3%) vs. Q4 2025
- Total value
- $213.5M
- +$49.0M (+29.8%) vs. Q4 2025
- New holders
- 30
- 82 more added
- Sold out
- 35
- 34 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ALT on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 210 | $456.1M |
| Q1 2026 | 173 | $213.5M |
| Q4 2025 | 183 | $198.8M |
| Q3 2025 | 159 | $156.4M |
| Q2 2025 | 180 | $145.5M |
| Q1 2025 | 177 | $191.2M |
| Q4 2024 | 183 | $292.3M |
| Q3 2024 | 169 | $243.0M |
| Q2 2024 | 173 | $282.1M |
| Q1 2024 | 171 | $452.2M |
| Q4 2023 | 143 | $377.1M |
| Q3 2023 | 113 | $79.2M |
| Q2 2023 | 120 | $124.5M |
| Q1 2023 | 133 | $205.4M |
| Q4 2022 | 128 | $769.9M |
| Q3 2022 | 122 | $588.1M |
| Q2 2022 | 111 | $466.9M |
| Q1 2022 | 103 | $207.4M |
| Q4 2021 | 102 | $295.8M |
| Q3 2021 | 119 | $375.3M |
| Q2 2021 | 109 | $269.2M |
| Q1 2021 | 98 | $336.5M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Altimmune, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Raymond James Financial Inc | 53,796 | $165.7K | 0.00% | −2,063−3.7% | Reduced |
| SG Americas Securities, LLC | 55,625 | $171.0K | 0.00% | +45,050+426.0% | Added |
| PVG Asset Management Corp | 66,120 | $174.6K | 0.10% | +66,120 | New |
| American Century Companies Inc | 62,909 | $193.8K | 0.00% | +62,909 | New |
| Leonteq Securities AG | 65,000 | $200.2K | 0.01% | +64,000+6,400.0% | Added |
| Virtu Financial LLC | 70,540 | $217.0K | 0.01% | +12,063+20.6% | Added |
| Ameriprise Financial Inc | 71,968 | $221.7K | 0.00% | −1,870−2.5% | Reduced |
| MetLife Investment Management | 72,213 | $222.4K | 0.00% | +34,020+89.1% | Added |
| Caption Management, LLC | 74,438 | $229.3K | 0.01% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 77,292 | $234.8K | 0.00% | +24,726+47.0% | Added |
| Citigroup Inc | 76,327 | $235.1K | 0.00% | +48,003+169.5% | Added |
| Kingswood Wealth Advisors, LLC | 76,500 | $235.6K | 0.01% | +40,500+112.5% | Added |
| Brevan Howard Capital Management LP | 78,403 | $241.5K | 0.00% | −35,725−31.3% | Reduced |
| Alliancebernstein L.P. | 71,760 | $259.1K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 85,454 | $263.2K | 0.00% | +64,307+304.1% | Added |
| Price T Rowe Associates Inc | 92,512 | $285.0K | 0.00% | +42,633+85.5% | Added |
| Wells Fargo & Company | 95,907 | $295.4K | 0.00% | −45,375−32.1% | Reduced |
| Nomura Asset Management International Inc. | 100,000 | $308.0K | 0.00% | 00.0% | Unchanged |
| Profund Advisors LLC | 103,141 | $317.7K | 0.01% | +30,843+42.7% | Added |
| Summit Financial Wealth Advisors, LLC | 103,288 | $318.1K | 0.05% | 00.0% | Unchanged |
| Silvercrest Asset Management Group LLC | 103,500 | $318.8K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 103,756 | $319.6K | 0.00% | +55,130+113.4% | Added |
| Alps Advisors Inc | 105,881 | $326.1K | 0.00% | +20,204+23.6% | Added |
| Jefferies Financial Group Inc. | 110,000 | $338.8K | 0.00% | −47,800−30.3% | Reduced |
| Engineers Gate Manager LP | 116,112 | $357.6K | 0.00% | +28,848+33.1% | Added |
| JPMorgan Chase & Co | 127,498 | $367.2K | 0.00% | +22,966+22.0% | Added |
| Deutsche Bank AG | 124,516 | $383.5K | 0.00% | +44,576+55.8% | Added |
| Grantham, Mayo, Van Otterloo & Co. LLC | 126,389 | $389.3K | 0.00% | −46,170−26.8% | Reduced |
| Man Group plc | 129,846 | $399.9K | 0.00% | +110,910+585.7% | Added |
| Wealth Effects LLC | 131,950 | $406.4K | 0.14% | +20,200+18.1% | Added |
| Stifel Financial Corp | 134,616 | $414.6K | 0.00% | +11,200+9.1% | Added |
| HSBC Holdings PLC | 154,365 | $476.2K | 0.00% | +22,144+16.7% | Added |
| Rhumbline Advisers | 155,671 | $479.5K | 0.00% | +34,158+28.1% | Added |
| Knoll Capital Management, LLC | 160,000 | $492.8K | 0.27% | −961,524−85.7% | Reduced |
| Commonwealth Equity Services, LLC | 160,374 | $493.9K | 0.00% | −21,109−11.6% | Reduced |
| Janney Montgomery Scott LLC | 172,610 | $532.0K | 0.00% | +70,000+68.2% | Added |
| Barclays PLC | 192,871 | $594.0K | 0.00% | −207,724−51.9% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 201,989 | $622.1K | 0.02% | −12,643−5.9% | Reduced |
| Invesco Ltd. | 227,857 | $701.8K | 0.00% | +13,033+6.1% | Added |
| Rafferty Asset Management, LLC | 231,271 | $712.3K | 0.00% | +35,505+18.1% | Added |
| Brown Wealth Management, LLC | 236,136 | $727.3K | 0.19% | −22,537−8.7% | Reduced |
| Baird Financial Group, Inc. | 237,522 | $731.6K | 0.00% | +118,082+98.9% | Added |
| Mangrove Partners | 239,280 | $737.0K | 0.06% | +239,280 | New |
| Wellington Management Group LLP | 248,158 | $764.3K | 0.00% | −9,113−3.5% | Reduced |
| Steward Partners Investment Advisory, LLC | 251,781 | $775.5K | 0.00% | +6,388+2.6% | Added |
| Charles Schwab Investment Management Inc | 351,681 | $1.08M | 0.00% | +68,012+24.0% | Added |
| Beirne Wealth Consulting Services, LLC | 411,858 | $1.27M | 0.36% | +35,400+9.4% | Added |
| Bank of New York Mellon Corp | 413,503 | $1.27M | 0.00% | +59,302+16.7% | Added |
| BNP Paribas Arbitrage, SA | 435,078 | $1.34M | 0.00% | +257,773+145.4% | Added |
| Citadel Advisors LLC | 448,873 | $1.38M | 0.00% | −889,054−66.5% | Reduced |
| Bank of America Corp | 570,203 | $1.76M | 0.00% | +186,420+48.6% | Added |
| Schroder Investment Management Group | 667,837 | $1.92M | 0.00% | +198,824+42.4% | Added |
| Point72 Asset Management, L.P. | 665,289 | $2.05M | 0.00% | +665,289 | New |
| Tang Capital Management LLC | 666,022 | $2.05M | 0.10% | −1,465,285−68.8% | Reduced |
| FMR LLC | 673,964 | $2.08M | 0.00% | +109,871+19.5% | Added |
| D. E. Shaw & Co., Inc. | 727,001 | $2.24M | 0.00% | −616,582−45.9% | Reduced |
| Morgan Stanley | 775,258 | $2.39M | 0.00% | −584,627−43.0% | Reduced |
| Vanguard Fiduciary Trust Co | 869,318 | $2.68M | 0.00% | +869,318 | New |
| UBS Group AG | 904,768 | $2.79M | 0.00% | +262,720+40.9% | Added |
| Northern Trust Corp | 996,721 | $3.07M | 0.00% | +280,730+39.2% | Added |
| Dimensional Fund Advisors LP | 1,045,926 | $3.22M | 0.00% | +762,223+268.7% | Added |
| Susquehanna International Group, LLP | 1,325,956 | $4.08M | 0.01% | −43,061−3.1% | Reduced |
| Goldman Sachs Group Inc | 1,350,649 | $4.16M | 0.00% | +1,356+0.1% | Added |
| Nuveen, LLC | 2,334,601 | $7.19M | 0.00% | +1,090,390+87.6% | Added |
| Two Sigma Investments, LP | 2,478,900 | $7.64M | 0.01% | +1,213,217+95.9% | Added |
| Alyeska Investment Group, L.P. | 2,644,600 | $8.15M | 0.02% | +2,644,600 | New |
| Geode Capital Management, LLC | 3,107,096 | $9.57M | 0.00% | +814,686+35.5% | Added |
| Millennium Management LLC | 3,258,191 | $10.0M | 0.01% | +3,050,808+1,471.1% | Added |
| Marshall Wace, LLP | 4,017,901 | $12.4M | 0.01% | +3,095,124+335.4% | Added |
| Vanguard Portfolio Management LLC | 5,382,002 | $16.6M | 0.00% | +5,382,002 | New |
| Vanguard Capital Management LLC | 5,658,049 | $17.4M | 0.00% | +5,658,049 | New |
| State Street Corp | 7,145,550 | $22.0M | 0.00% | +2,025,847+39.6% | Added |
| BlackRock, Inc. | 12,795,277 | $39.4M | 0.00% | +3,090,979+31.9% | Added |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −1,783,950−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −793,900−100.0% | Sold out |
| Soviero Asset Management, LP | 0 | $0 | 0.00% | −400,000−100.0% | Sold out |
| Sculptor Capital LP | 0 | $0 | 0.00% | −276,700−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −242,017−100.0% | Sold out |
| Pavaki Capital Management LLC | 0 | $0 | 0.00% | −215,400−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −128,529−100.0% | Sold out |
| Susquehanna Portfolio Strategies, LLC | 0 | $0 | 0.00% | −135,170−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −124,821−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −69,476−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −61,300−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −60,109−100.0% | Sold out |
| Bridgeway Capital Management, LLC | 0 | $0 | 0.00% | −50,600−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −30,603−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −22,469−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −19,820−100.0% | Sold out |
| PKS Advisory Services, LLC | 0 | $0 | 0.00% | −15,100−100.0% | Sold out |
| Wiley Bros.-Aintree Capital, LLC | 0 | $0 | 0.00% | −15,035−100.0% | Sold out |
| National Asset Management, Inc. | 0 | $0 | 0.00% | −13,955−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −13,021−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −12,669−100.0% | Sold out |
| Sequoia Financial Advisors, LLC | 0 | $0 | 0.00% | −12,428−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −12,274−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −10,101−100.0% | Sold out |
| TD Waterhouse Canada Inc. | 0 | $0 | 0.00% | −3,500−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −2,786−100.0% | Sold out |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0 | $0 | 0.00% | −1,125−100.0% | Sold out |