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 |
|---|---|---|---|---|---|
| Vanguard Group Inc | 6,373,638 | $24.0M | 0.00% | +1,206,514+23.3% | Added |
| BlackRock, Inc. | 6,373,259 | $24.0M | 0.00% | +6990.0% | Added |
| State Street Corp | 3,601,255 | $13.6M | 0.00% | +847,617+30.8% | Added |
| Tang Capital Management LLC | 2,131,307 | $8.04M | 0.31% | −618,693−22.5% | Reduced |
| Geode Capital Management, LLC | 2,017,385 | $7.61M | 0.00% | +82,505+4.3% | Added |
| Two Sigma Investments, LP | 1,996,848 | $7.53M | 0.01% | +1,559,562+356.6% | Added |
| Morgan Stanley | 1,491,049 | $5.62M | 0.00% | +655,642+78.5% | Added |
| Two Sigma Advisers, LP | 1,428,400 | $5.39M | 0.01% | +1,299,200+1,005.6% | Added |
| Susquehanna International Group, LLP | 1,374,182 | $5.18M | 0.01% | −245,565−15.2% | Reduced |
| Citadel Advisors LLC | 1,282,014 | $4.83M | 0.00% | +758,553+144.9% | Added |
| Knoll Capital Management, LLC | 1,121,524 | $4.23M | 2.27% | 00.0% | Unchanged |
| Northern Trust Corp | 657,016 | $2.48M | 0.00% | +16,670+2.6% | Added |
| UBS Group AG | 642,837 | $2.42M | 0.00% | −244,081−27.5% | Reduced |
| Squarepoint Ops LLC | 584,696 | $2.20M | 0.00% | +584,696 | New |
| Goldman Sachs Group Inc | 562,257 | $2.12M | 0.00% | +63,019+12.6% | Added |
| Point72 Asset Management, L.P. | 476,926 | $1.80M | 0.00% | +476,926 | New |
| FMR LLC | 445,137 | $1.68M | 0.00% | +43,294+10.8% | Added |
| Beirne Wealth Consulting Services, LLC | 410,458 | $1.55M | 0.37% | +68,000+19.9% | Added |
| Millennium Management LLC | 367,582 | $1.39M | 0.00% | +289,288+369.5% | Added |
| D. E. Shaw & Co., Inc. | 360,395 | $1.36M | 0.00% | +309,137+603.1% | Added |
| Bank of New York Mellon Corp | 341,985 | $1.29M | 0.00% | +9,969+3.0% | Added |
| Barclays PLC | 340,283 | $1.28M | 0.00% | +48,188+16.5% | Added |
| Bank of America Corp | 320,440 | $1.21M | 0.00% | −395,579−55.2% | Reduced |
| Dimensional Fund Advisors LP | 297,789 | $1.12M | 0.00% | −149,681−33.5% | Reduced |
| Jane Street Group, LLC | 280,199 | $1.06M | 0.00% | +280,199 | New |
| Sculptor Capital LP | 276,700 | $1.04M | 0.01% | +125,700+83.2% | Added |
| Wellington Management Group LLP | 264,802 | $998.3K | 0.00% | +12,936+5.1% | Added |
| Brown Wealth Management, LLC | 233,673 | $880.9K | 0.25% | +2,590+1.1% | Added |
| Brevan Howard Capital Management LP | 222,942 | $840.5K | 0.01% | +89,733+67.4% | Added |
| Steward Partners Investment Advisory, LLC | 219,309 | $826.8K | 0.00% | +5,925+2.8% | Added |
| Simplex Trading, LLC | 213,709 | $805.0K | 0.02% | +113,742+113.8% | Added |
| Charles Schwab Investment Management Inc | 204,449 | $770.8K | 0.00% | −29,057−12.4% | Reduced |
| Nuveen, LLC | 202,355 | $762.9K | 0.00% | 00.0% | Unchanged |
| Hennion & Walsh Asset Management, Inc. | 185,575 | $699.6K | 0.03% | −3,380−1.8% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 185,227 | $698.3K | 0.01% | +100,898+119.6% | Added |
| ExodusPoint Capital Management, LP | 178,177 | $671.7K | 0.01% | +138,918+353.9% | Added |
| Commonwealth Equity Services, LLC | 174,097 | $656.0K | 0.00% | +75,176+76.0% | Added |
| Invesco Ltd. | 161,943 | $610.5K | 0.00% | +55,080+51.5% | Added |
| Rafferty Asset Management, LLC | 156,194 | $588.9K | 0.00% | +54,183+53.1% | Added |
| Group One Trading, L.P. | 140,255 | $528.8K | 0.02% | −329,134−70.1% | Reduced |
| Rhumbline Advisers | 130,743 | $492.9K | 0.00% | +16,762+14.7% | Added |
| Caption Management, LLC | 130,000 | $490.1K | 0.03% | −850,781−86.7% | Reduced |
| Baird Financial Group, Inc. | 119,440 | $450.3K | 0.00% | +60,000+100.9% | Added |
| Gsa Capital Partners LLP | 116,770 | $440.0K | 0.04% | −4,594−3.8% | Reduced |
| Jump Financial, LLC | 115,800 | $436.6K | 0.01% | +115,800 | New |
| IMC-Chicago, LLC | 115,360 | $434.9K | 0.01% | −71,458−38.3% | Reduced |
| Silvercrest Asset Management Group LLC | 103,500 | $390.2K | 0.00% | 00.0% | Unchanged |
| Macquarie Group Ltd | 100,000 | $377.0K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 99,191 | $374.0K | 0.00% | −5,506−5.3% | Reduced |
| Summit Financial Wealth Advisors, LLC | 96,288 | $372.6K | 0.06% | −26,700−21.7% | Reduced |
| Wells Fargo & Company | 92,907 | $350.3K | 0.00% | −5,471−5.6% | Reduced |
| Deutsche Bank AG | 76,893 | $289.9K | 0.00% | +6,122+8.7% | Added |
| BNP Paribas Arbitrage, SA | 74,533 | $281.0K | 0.00% | +64,438+638.3% | Added |
| Ameriprise Financial Inc | 74,312 | $280.2K | 0.00% | −39,563−34.7% | Reduced |
| HSBC Holdings PLC | 73,126 | $272.0K | 0.00% | −12,342−14.4% | Reduced |
| Alliancebernstein L.P. | 71,760 | $270.5K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 66,733 | $251.0K | 0.00% | +5,770+9.5% | Added |
| LPL Financial LLC | 61,524 | $231.9K | 0.00% | −13,969−18.5% | Reduced |
| Stifel Financial Corp | 60,411 | $227.8K | 0.00% | +18,851+45.4% | Added |
| Wealth Effects LLC | 59,850 | $225.6K | 0.07% | +28,100+88.5% | Added |
| Janney Montgomery Scott LLC | 58,560 | $221.0K | 0.00% | +58,560 | New |
| Bridgeway Capital Management, LLC | 50,600 | $190.8K | 0.00% | +50,600 | New |
| Jefferies Financial Group Inc. | 50,000 | $188.5K | 0.00% | +15,000+42.9% | Added |
| DLD Asset Management, LP | 50,000 | $188.5K | 0.02% | +27,400+121.2% | Added |
| Virtu Financial LLC | 48,068 | $181.0K | 0.01% | −219,710−82.0% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 45,905 | $173.2K | 0.00% | −1,443−3.0% | Reduced |
| MetLife Investment Management | 44,534 | $167.9K | 0.00% | −2,336−5.0% | Reduced |
| Price T Rowe Associates Inc | 41,493 | $157.0K | 0.00% | +7,262+21.2% | Added |
| Engineers Gate Manager LP | 41,043 | $154.7K | 0.00% | +41,043 | New |
| Intech Investment Management LLC | 38,639 | $145.7K | 0.00% | −106,251−73.3% | Reduced |
| Creative Planning | 36,378 | $137.1K | 0.00% | −4,786−11.6% | Reduced |
| MML Investors Services, LLC | 34,550 | $130.3K | 0.00% | −4,768−12.1% | Reduced |
| Sig Brokerage, LP | 34,502 | $130.1K | 0.03% | +34,502 | New |
| Profund Advisors LLC | 33,712 | $127.1K | 0.00% | +11,999+55.3% | Added |
| Verition Fund Management LLC | 31,154 | $117.5K | 0.00% | 00.0% | Unchanged |
| Raymond James Financial Inc | 27,672 | $104.3K | 0.00% | +1,703+6.6% | Added |
| Farallon Capital Management, L.L.C. | 27,600 | $104.1K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 25,987 | $98.0K | 0.00% | −1,958−7.0% | Reduced |
| Concurrent Investment Advisors, LLC | 24,008 | $90.5K | 0.00% | −1,250−4.9% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 23,573 | $88.9K | 0.00% | +7,263+44.5% | Added |
| Wolverine Trading, LLC | 21,820 | $82.7K | 0.00% | −23,708−52.1% | Reduced |
| New York State Common Retirement Fund | 21,447 | $80.9K | 0.00% | 00.0% | Unchanged |
| National Asset Management, Inc. | 20,480 | $77.2K | 0.00% | +2,192+12.0% | Added |
| Axq Capital, LP | 20,435 | $77.0K | 0.03% | −20,847−50.5% | Reduced |
| Cetera Investment Advisers | 20,206 | $76.2K | 0.00% | +2,056+11.3% | Added |
| Quest Partners LLC | 19,820 | $74.7K | 0.00% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 18,040 | $68.0K | 0.00% | +18,040 | New |
| Advisor Group Holdings, Inc. | 17,748 | $67.8K | 0.00% | −333−1.8% | Reduced |
| Kraematon Investment Advisors, Inc | 17,435 | $65.7K | 0.06% | −16,150−48.1% | Reduced |
| ProShare Advisors LLC | 17,081 | $64.4K | 0.00% | −1,817−9.6% | Reduced |
| Miracle Mile Advisors, LLC | 17,020 | $64.2K | 0.00% | −19−0.1% | Reduced |
| Fortis Capital Management LLC | 16,606 | $62.6K | 0.01% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 16,033 | $60.4K | 0.00% | +15,913+13,260.8% | Added |
| Virtus Investment Advisers, Inc. | 15,914 | $60.0K | 0.02% | +2,763+21.0% | Added |
| Sherbrooke Park Advisers LLC | 15,904 | $60.0K | 0.03% | +15,904 | New |
| Walleye Capital LLC | 15,518 | $58.5K | 0.00% | +15,518 | New |
| China Universal Asset Management Co., Ltd. | 15,470 | $58.3K | 0.00% | −820−5.0% | Reduced |
| Kingswood Wealth Advisors, LLC | 15,400 | $58.1K | 0.00% | +5,000+48.1% | Added |
| Walleye Trading LLC | 14,759 | $55.6K | 0.00% | +14,759 | New |
| Russell Investments Group, Ltd. | 13,929 | $52.5K | 0.00% | +9,249+197.6% | Added |