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, Q4 2025
Institutional positions in Altimmune, Inc. as of Dec 31, 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
- 183
- +27 vs. Q3 2025
- Shares held
- 55.1M
- +13.6M (+32.8%) vs. Q3 2025
- Total value
- $198.8M
- +$42.6M (+27.2%) vs. Q3 2025
- New holders
- 48
- 75 more added
- Sold out
- 21
- 28 more reduced
3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Altimmune, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Acadian Asset Management LLC | 35,732 | $128.0K | 0.00% | +35,732 | New |
| Kingswood Wealth Advisors, LLC | 36,000 | $130.0K | 0.01% | +20,600+133.8% | Added |
| MetLife Investment Management | 38,193 | $137.9K | 0.00% | −6,341−14.2% | Reduced |
| Rockefeller Capital Management L.P. | 43,167 | $155.8K | 0.00% | +43,113+79,838.9% | Added |
| Creative Planning | 46,886 | $169.3K | 0.00% | +10,508+28.9% | Added |
| Voleon Capital Management LP | 47,055 | $169.9K | 0.00% | +47,055 | New |
| LPL Financial LLC | 48,626 | $175.5K | 0.00% | −12,898−21.0% | Reduced |
| Price T Rowe Associates Inc | 49,879 | $181.0K | 0.00% | +8,386+20.2% | Added |
| Virtus Investment Advisers, Inc. | 50,482 | $182.2K | 0.05% | +34,568+217.2% | Added |
| Bridgeway Capital Management, LLC | 50,600 | $182.7K | 0.00% | 00.0% | Unchanged |
| Intech Investment Management LLC | 52,557 | $189.7K | 0.00% | +13,918+36.0% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 52,566 | $189.8K | 0.00% | +6,661+14.5% | Added |
| Raymond James Financial Inc | 55,859 | $201.7K | 0.00% | +28,187+101.9% | Added |
| Blair William & Co | 56,434 | $203.7K | 0.00% | +56,434 | New |
| Virtu Financial LLC | 58,477 | $211.0K | 0.01% | +10,409+21.7% | Added |
| Balyasny Asset Management LLC | 60,109 | $217.0K | 0.00% | +60,109 | New |
| LMR Partners LLP | 61,300 | $221.3K | 0.00% | +61,300 | New |
| Walleye Capital LLC | 65,665 | $237.1K | 0.00% | +50,147+323.2% | Added |
| Verition Fund Management LLC | 69,476 | $250.8K | 0.00% | +38,322+123.0% | Added |
| Alliancebernstein L.P. | 71,760 | $259.1K | 0.00% | 00.0% | Unchanged |
| Profund Advisors LLC | 72,298 | $261.0K | 0.01% | +38,586+114.5% | Added |
| Ameriprise Financial Inc | 73,838 | $266.6K | 0.00% | −474−0.6% | Reduced |
| Caption Management, LLC | 74,438 | $268.7K | 0.01% | −55,562−42.7% | Reduced |
| Deutsche Bank AG | 79,940 | $288.6K | 0.00% | +3,047+4.0% | Added |
| Alps Advisors Inc | 85,677 | $309.3K | 0.00% | +85,677 | New |
| Engineers Gate Manager LP | 87,264 | $315.0K | 0.00% | +46,221+112.6% | Added |
| Nomura Asset Management International Inc. | 100,000 | $361.0K | 0.00% | +100,000 | New |
| Janney Montgomery Scott LLC | 102,610 | $370.0K | 0.00% | +44,050+75.2% | Added |
| Summit Financial Wealth Advisors, LLC | 103,288 | $372.9K | 0.05% | +7,000+7.3% | Added |
| Silvercrest Asset Management Group LLC | 103,500 | $373.6K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 104,532 | $377.4K | 0.00% | +5,341+5.4% | Added |
| Wealth Effects LLC | 111,750 | $403.4K | 0.13% | +51,900+86.7% | Added |
| Brevan Howard Capital Management LP | 114,128 | $412.0K | 0.01% | −108,814−48.8% | Reduced |
| Baird Financial Group, Inc. | 119,440 | $431.2K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 121,513 | $438.7K | 0.00% | −9,230−7.1% | Reduced |
| Stifel Financial Corp | 123,416 | $445.5K | 0.00% | +63,005+104.3% | Added |
| Jacobs Levy Equity Management, Inc | 124,821 | $450.6K | 0.00% | +124,821 | New |
| HSBC Holdings PLC | 132,221 | $474.0K | 0.00% | +59,095+80.8% | Added |
| Susquehanna Portfolio Strategies, LLC | 135,170 | $488.0K | 0.01% | −50,057−27.0% | Reduced |
| Wells Fargo & Company | 141,282 | $510.0K | 0.00% | +48,375+52.1% | Added |
| Los Angeles Capital Management LLC | 128,529 | $523.1K | 0.00% | +128,529 | New |
| Jefferies Financial Group Inc. | 157,800 | $569.7K | 0.00% | +107,800+215.6% | Added |
| Grantham, Mayo, Van Otterloo & Co. LLC | 172,559 | $622.9K | 0.00% | +172,559 | New |
| IMC-Chicago, LLC | 173,130 | $625.0K | 0.01% | +57,770+50.1% | Added |
| BNP Paribas Arbitrage, SA | 177,305 | $640.1K | 0.00% | +102,772+137.9% | Added |
| Commonwealth Equity Services, LLC | 181,483 | $655.1K | 0.00% | +7,386+4.2% | Added |
| Rafferty Asset Management, LLC | 195,766 | $706.7K | 0.00% | +39,572+25.3% | Added |
| Millennium Management LLC | 207,383 | $748.7K | 0.00% | −160,199−43.6% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 214,632 | $774.8K | 0.03% | +29,057+15.7% | Added |
| Invesco Ltd. | 214,824 | $775.5K | 0.00% | +52,881+32.7% | Added |
| Pavaki Capital Management LLC | 215,400 | $777.6K | 0.54% | +215,400 | New |
| Jump Financial, LLC | 242,017 | $873.7K | 0.01% | +126,217+109.0% | Added |
| Steward Partners Investment Advisory, LLC | 245,393 | $885.9K | 0.00% | +26,084+11.9% | Added |
| Wellington Management Group LLP | 257,271 | $928.7K | 0.00% | −7,531−2.8% | Reduced |
| Brown Wealth Management, LLC | 258,673 | $933.8K | 0.25% | +25,000+10.7% | Added |
| Sculptor Capital LP | 276,700 | $998.9K | 0.01% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 283,669 | $1.02M | 0.00% | +79,220+38.7% | Added |
| Dimensional Fund Advisors LP | 283,703 | $1.02M | 0.00% | −14,086−4.7% | Reduced |
| Bank of New York Mellon Corp | 354,201 | $1.28M | 0.00% | +12,216+3.6% | Added |
| Beirne Wealth Consulting Services, LLC | 376,458 | $1.36M | 0.39% | −34,000−8.3% | Reduced |
| Bank of America Corp | 383,783 | $1.39M | 0.00% | +63,343+19.8% | Added |
| Soviero Asset Management, LP | 400,000 | $1.44M | 0.75% | +400,000 | New |
| Barclays PLC | 400,595 | $1.45M | 0.00% | +60,312+17.7% | Added |
| Schroder Investment Management Group | 469,013 | $1.69M | 0.00% | +469,013 | New |
| FMR LLC | 564,093 | $2.04M | 0.00% | +118,956+26.7% | Added |
| UBS Group AG | 642,048 | $2.32M | 0.00% | −789−0.1% | Reduced |
| Northern Trust Corp | 715,991 | $2.58M | 0.00% | +58,975+9.0% | Added |
| Two Sigma Advisers, LP | 793,900 | $2.87M | 0.01% | −634,500−44.4% | Reduced |
| Marshall Wace, LLP | 922,777 | $3.33M | 0.00% | +922,777 | New |
| Knoll Capital Management, LLC | 1,121,524 | $4.05M | 1.86% | 00.0% | Unchanged |
| Nuveen, LLC | 1,244,211 | $4.49M | 0.00% | +1,041,856+514.9% | Added |
| Two Sigma Investments, LP | 1,265,683 | $4.57M | 0.01% | −731,165−36.6% | Reduced |
| Citadel Advisors LLC | 1,337,927 | $4.83M | 0.00% | +55,913+4.4% | Added |
| D. E. Shaw & Co., Inc. | 1,343,583 | $4.85M | 0.00% | +983,188+272.8% | Added |
| Goldman Sachs Group Inc | 1,349,293 | $4.87M | 0.00% | +787,036+140.0% | Added |
| Morgan Stanley | 1,359,885 | $4.91M | 0.00% | −131,164−8.8% | Reduced |
| Susquehanna International Group, LLP | 1,369,017 | $4.94M | 0.01% | −5,165−0.4% | Reduced |
| Jane Street Group, LLC | 1,783,950 | $6.44M | 0.01% | +1,503,751+536.7% | Added |
| Tang Capital Management LLC | 2,131,307 | $7.69M | 0.38% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 2,292,410 | $8.28M | 0.00% | +275,025+13.6% | Added |
| State Street Corp | 5,119,703 | $18.5M | 0.00% | +1,518,448+42.2% | Added |
| Vanguard Group Inc | 9,491,159 | $34.3M | 0.00% | +3,117,521+48.9% | Added |
| BlackRock, Inc. | 9,704,298 | $35.0M | 0.00% | +3,331,039+52.3% | Added |
| Bessemer Group Inc | 0 | $0 | 0.00% | −660−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −476,926−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −213,709−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −116,770−100.0% | Sold out |
| Macquarie Group Ltd | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| DLD Asset Management, LP | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Sig Brokerage, LP | 0 | $0 | 0.00% | −34,502−100.0% | Sold out |
| Kraematon Investment Advisors, Inc | 0 | $0 | 0.00% | −17,435−100.0% | Sold out |
| Fortis Capital Management LLC | 0 | $0 | 0.00% | −16,606−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −14,759−100.0% | Sold out |
| Cambridge Investment Research Advisors, Inc. | 0 | $0 | 0.00% | −12,532−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −5,019−100.0% | Sold out |
| HighTower Advisors, LLC | 0 | $0 | 0.00% | −4,909−100.0% | Sold out |
| FNY Investment Advisers, LLC | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |
| Groupe la Francaise | 0 | $0 | 0.00% | −1,200−100.0% | Sold out |
| NBC Securities, Inc. | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Global Retirement Partners, LLC | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |