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, Q3 2025
Institutional positions in Altimmune, Inc. as of Sep 30, 2025. 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
- 159
- −18 vs. Q2 2025
- Shares held
- 41.5M
- +3.91M (+10.4%) vs. Q2 2025
- Total value
- $156.4M
- +$11.0M (+7.6%) vs. Q2 2025
- New holders
- 23
- 57 more added
- Sold out
- 41
- 48 more reduced
3 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Altimmune, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| LPL Financial LLC | 61,524 | $231.9K | 0.00% | −13,969−18.5% | Reduced |
| Royal Bank of Canada | 66,733 | $251.0K | 0.00% | +5,770+9.5% | Added |
| Alliancebernstein L.P. | 71,760 | $270.5K | 0.00% | 00.0% | Unchanged |
| HSBC Holdings PLC | 73,126 | $272.0K | 0.00% | −12,342−14.4% | Reduced |
| Ameriprise Financial Inc | 74,312 | $280.2K | 0.00% | −39,563−34.7% | Reduced |
| BNP Paribas Arbitrage, SA | 74,533 | $281.0K | 0.00% | +64,438+638.3% | Added |
| Deutsche Bank AG | 76,893 | $289.9K | 0.00% | +6,122+8.7% | Added |
| Wells Fargo & Company | 92,907 | $350.3K | 0.00% | −5,471−5.6% | Reduced |
| Summit Financial Wealth Advisors, LLC | 96,288 | $372.6K | 0.06% | −26,700−21.7% | Reduced |
| JPMorgan Chase & Co | 99,191 | $374.0K | 0.00% | −5,506−5.3% | Reduced |
| Macquarie Group Ltd | 100,000 | $377.0K | 0.00% | 00.0% | Unchanged |
| Silvercrest Asset Management Group LLC | 103,500 | $390.2K | 0.00% | 00.0% | Unchanged |
| IMC-Chicago, LLC | 115,360 | $434.9K | 0.01% | −71,458−38.3% | Reduced |
| Jump Financial, LLC | 115,800 | $436.6K | 0.01% | +115,800 | New |
| Gsa Capital Partners LLP | 116,770 | $440.0K | 0.04% | −4,594−3.8% | Reduced |
| Baird Financial Group, Inc. | 119,440 | $450.3K | 0.00% | +60,000+100.9% | Added |
| Caption Management, LLC | 130,000 | $490.1K | 0.03% | −850,781−86.7% | Reduced |
| Rhumbline Advisers | 130,743 | $492.9K | 0.00% | +16,762+14.7% | Added |
| Group One Trading, L.P. | 140,255 | $528.8K | 0.02% | −329,134−70.1% | Reduced |
| Rafferty Asset Management, LLC | 156,194 | $588.9K | 0.00% | +54,183+53.1% | Added |
| Invesco Ltd. | 161,943 | $610.5K | 0.00% | +55,080+51.5% | Added |
| Commonwealth Equity Services, LLC | 174,097 | $656.0K | 0.00% | +75,176+76.0% | Added |
| ExodusPoint Capital Management, LP | 178,177 | $671.7K | 0.01% | +138,918+353.9% | Added |
| Susquehanna Portfolio Strategies, LLC | 185,227 | $698.3K | 0.01% | +100,898+119.6% | Added |
| Hennion & Walsh Asset Management, Inc. | 185,575 | $699.6K | 0.03% | −3,380−1.8% | Reduced |
| Nuveen, LLC | 202,355 | $762.9K | 0.00% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 204,449 | $770.8K | 0.00% | −29,057−12.4% | Reduced |
| Simplex Trading, LLC | 213,709 | $805.0K | 0.02% | +113,742+113.8% | Added |
| Steward Partners Investment Advisory, LLC | 219,309 | $826.8K | 0.00% | +5,925+2.8% | Added |
| Brevan Howard Capital Management LP | 222,942 | $840.5K | 0.01% | +89,733+67.4% | Added |
| Brown Wealth Management, LLC | 233,673 | $880.9K | 0.25% | +2,590+1.1% | Added |
| Wellington Management Group LLP | 264,802 | $998.3K | 0.00% | +12,936+5.1% | Added |
| Sculptor Capital LP | 276,700 | $1.04M | 0.01% | +125,700+83.2% | Added |
| Jane Street Group, LLC | 280,199 | $1.06M | 0.00% | +280,199 | New |
| Dimensional Fund Advisors LP | 297,789 | $1.12M | 0.00% | −149,681−33.5% | Reduced |
| Bank of America Corp | 320,440 | $1.21M | 0.00% | −395,579−55.2% | Reduced |
| Barclays PLC | 340,283 | $1.28M | 0.00% | +48,188+16.5% | Added |
| Bank of New York Mellon Corp | 341,985 | $1.29M | 0.00% | +9,969+3.0% | Added |
| D. E. Shaw & Co., Inc. | 360,395 | $1.36M | 0.00% | +309,137+603.1% | Added |
| Millennium Management LLC | 367,582 | $1.39M | 0.00% | +289,288+369.5% | Added |
| Beirne Wealth Consulting Services, LLC | 410,458 | $1.55M | 0.37% | +68,000+19.9% | Added |
| FMR LLC | 445,137 | $1.68M | 0.00% | +43,294+10.8% | Added |
| Point72 Asset Management, L.P. | 476,926 | $1.80M | 0.00% | +476,926 | New |
| Goldman Sachs Group Inc | 562,257 | $2.12M | 0.00% | +63,019+12.6% | Added |
| Squarepoint Ops LLC | 584,696 | $2.20M | 0.00% | +584,696 | New |
| UBS Group AG | 642,837 | $2.42M | 0.00% | −244,081−27.5% | Reduced |
| Northern Trust Corp | 657,016 | $2.48M | 0.00% | +16,670+2.6% | Added |
| Knoll Capital Management, LLC | 1,121,524 | $4.23M | 2.27% | 00.0% | Unchanged |
| Citadel Advisors LLC | 1,282,014 | $4.83M | 0.00% | +758,553+144.9% | Added |
| Susquehanna International Group, LLP | 1,374,182 | $5.18M | 0.01% | −245,565−15.2% | Reduced |
| Two Sigma Advisers, LP | 1,428,400 | $5.39M | 0.01% | +1,299,200+1,005.6% | Added |
| Morgan Stanley | 1,491,049 | $5.62M | 0.00% | +655,642+78.5% | Added |
| Two Sigma Investments, LP | 1,996,848 | $7.53M | 0.01% | +1,559,562+356.6% | Added |
| Geode Capital Management, LLC | 2,017,385 | $7.61M | 0.00% | +82,505+4.3% | Added |
| Tang Capital Management LLC | 2,131,307 | $8.04M | 0.31% | −618,693−22.5% | Reduced |
| State Street Corp | 3,601,255 | $13.6M | 0.00% | +847,617+30.8% | Added |
| BlackRock, Inc. | 6,373,259 | $24.0M | 0.00% | +6990.0% | Added |
| Vanguard Group Inc | 6,373,638 | $24.0M | 0.00% | +1,206,514+23.3% | Added |
| Cornerstone Planning Group LLC | 2,562 | – | – | +2,561+256,100.0% | Added |
| Scientech Research LLC | 0 | $0 | 0.00% | −254,312−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −239,630−100.0% | Sold out |
| Gerber, LLC | 0 | $0 | 0.00% | −206,778−100.0% | Sold out |
| Exchange Traded Concepts, LLC | 0 | $0 | 0.00% | −175,707−100.0% | Sold out |
| Moody Aldrich Partners LLC | 0 | $0 | 0.00% | −157,614−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −142,863−100.0% | Sold out |
| Avidity Partners Management LP | 0 | $0 | 0.00% | −105,000−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −92,319−100.0% | Sold out |
| Envestnet Asset Management Inc | 0 | $0 | 0.00% | −32,908−100.0% | Sold out |
| Wealth Enhancement Advisory Services, LLC | 0 | $0 | 0.00% | −24,828−100.0% | Sold out |
| Resources Investment Advisors, LLC. | 0 | $0 | 0.00% | −24,147−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −22,100−100.0% | Sold out |
| Baader Bank INC | 0 | $0 | 0.00% | −34,292−100.0% | Sold out |
| Glenmede Investment Management, LP | 0 | $0 | 0.00% | −20,465−100.0% | Sold out |
| Vivaldi Capital Management, LLC | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| Headlands Technologies LLC | 0 | $0 | 0.00% | −18,557−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −18,421−100.0% | Sold out |
| Horizon Wealth Management, LLC | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |
| State Board of Administration of Florida Retirement System | 0 | $0 | 0.00% | −14,344−100.0% | Sold out |
| Bayesian Capital Management, LP | 0 | $0 | 0.00% | −14,300−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −13,947−100.0% | Sold out |
| Mercer Global Advisors Inc | 0 | $0 | 0.00% | −12,868−100.0% | Sold out |
| PFG Investments, LLC | 0 | $0 | 0.00% | −12,000−100.0% | Sold out |
| 180 Wealth Advisors, LLC | 0 | $0 | 0.00% | −11,300−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −11,195−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −10,165−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −4,215−100.0% | Sold out |
| PEAK6 LLC | 0 | $0 | 0.00% | −3,423−100.0% | Sold out |
| Accordant Advisory Group Inc | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Winnow Wealth LLC | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −572−100.0% | Sold out |
| GAMMA Investing LLC | 0 | $0 | 0.00% | −327−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −318−100.0% | Sold out |
| Versant Capital Management, Inc | 0 | $0 | 0.00% | −230−100.0% | Sold out |
| Rothschild Investment LLC | 0 | $0 | 0.00% | −195−100.0% | Sold out |
| Allworth Financial LP | 0 | $0 | 0.00% | −190−100.0% | Sold out |
| Parkside Financial Bank & Trust | 0 | $0 | 0.00% | −105−100.0% | Sold out |
| CoreCap Advisors, LLC | 0 | $0 | 0.00% | −71−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −35−100.0% | Sold out |
| Tradewinds Capital Management, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −13−100.0% | Sold out |