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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9,704,298 | $35.0M | 0.00% | +3,331,039+52.3% | Added |
| Vanguard Group Inc | 9,491,159 | $34.3M | 0.00% | +3,117,521+48.9% | Added |
| State Street Corp | 5,119,703 | $18.5M | 0.00% | +1,518,448+42.2% | Added |
| Geode Capital Management, LLC | 2,292,410 | $8.28M | 0.00% | +275,025+13.6% | Added |
| Tang Capital Management LLC | 2,131,307 | $7.69M | 0.38% | 00.0% | Unchanged |
| Jane Street Group, LLC | 1,783,950 | $6.44M | 0.01% | +1,503,751+536.7% | Added |
| Susquehanna International Group, LLP | 1,369,017 | $4.94M | 0.01% | −5,165−0.4% | Reduced |
| Morgan Stanley | 1,359,885 | $4.91M | 0.00% | −131,164−8.8% | Reduced |
| Goldman Sachs Group Inc | 1,349,293 | $4.87M | 0.00% | +787,036+140.0% | Added |
| D. E. Shaw & Co., Inc. | 1,343,583 | $4.85M | 0.00% | +983,188+272.8% | Added |
| Citadel Advisors LLC | 1,337,927 | $4.83M | 0.00% | +55,913+4.4% | Added |
| Two Sigma Investments, LP | 1,265,683 | $4.57M | 0.01% | −731,165−36.6% | Reduced |
| Nuveen, LLC | 1,244,211 | $4.49M | 0.00% | +1,041,856+514.9% | Added |
| Knoll Capital Management, LLC | 1,121,524 | $4.05M | 1.86% | 00.0% | Unchanged |
| Marshall Wace, LLP | 922,777 | $3.33M | 0.00% | +922,777 | New |
| Two Sigma Advisers, LP | 793,900 | $2.87M | 0.01% | −634,500−44.4% | Reduced |
| Northern Trust Corp | 715,991 | $2.58M | 0.00% | +58,975+9.0% | Added |
| UBS Group AG | 642,048 | $2.32M | 0.00% | −789−0.1% | Reduced |
| FMR LLC | 564,093 | $2.04M | 0.00% | +118,956+26.7% | Added |
| Schroder Investment Management Group | 469,013 | $1.69M | 0.00% | +469,013 | New |
| Barclays PLC | 400,595 | $1.45M | 0.00% | +60,312+17.7% | Added |
| Soviero Asset Management, LP | 400,000 | $1.44M | 0.75% | +400,000 | New |
| Bank of America Corp | 383,783 | $1.39M | 0.00% | +63,343+19.8% | Added |
| Beirne Wealth Consulting Services, LLC | 376,458 | $1.36M | 0.39% | −34,000−8.3% | Reduced |
| Bank of New York Mellon Corp | 354,201 | $1.28M | 0.00% | +12,216+3.6% | Added |
| Dimensional Fund Advisors LP | 283,703 | $1.02M | 0.00% | −14,086−4.7% | Reduced |
| Charles Schwab Investment Management Inc | 283,669 | $1.02M | 0.00% | +79,220+38.7% | Added |
| Sculptor Capital LP | 276,700 | $998.9K | 0.01% | 00.0% | Unchanged |
| Brown Wealth Management, LLC | 258,673 | $933.8K | 0.25% | +25,000+10.7% | Added |
| Wellington Management Group LLP | 257,271 | $928.7K | 0.00% | −7,531−2.8% | Reduced |
| Steward Partners Investment Advisory, LLC | 245,393 | $885.9K | 0.00% | +26,084+11.9% | Added |
| Jump Financial, LLC | 242,017 | $873.7K | 0.01% | +126,217+109.0% | Added |
| Pavaki Capital Management LLC | 215,400 | $777.6K | 0.54% | +215,400 | New |
| Invesco Ltd. | 214,824 | $775.5K | 0.00% | +52,881+32.7% | Added |
| Hennion & Walsh Asset Management, Inc. | 214,632 | $774.8K | 0.03% | +29,057+15.7% | Added |
| Millennium Management LLC | 207,383 | $748.7K | 0.00% | −160,199−43.6% | Reduced |
| Rafferty Asset Management, LLC | 195,766 | $706.7K | 0.00% | +39,572+25.3% | Added |
| Commonwealth Equity Services, LLC | 181,483 | $655.1K | 0.00% | +7,386+4.2% | Added |
| BNP Paribas Arbitrage, SA | 177,305 | $640.1K | 0.00% | +102,772+137.9% | Added |
| IMC-Chicago, LLC | 173,130 | $625.0K | 0.01% | +57,770+50.1% | Added |
| Grantham, Mayo, Van Otterloo & Co. LLC | 172,559 | $622.9K | 0.00% | +172,559 | New |
| Jefferies Financial Group Inc. | 157,800 | $569.7K | 0.00% | +107,800+215.6% | Added |
| Los Angeles Capital Management LLC | 128,529 | $523.1K | 0.00% | +128,529 | New |
| Wells Fargo & Company | 141,282 | $510.0K | 0.00% | +48,375+52.1% | Added |
| Susquehanna Portfolio Strategies, LLC | 135,170 | $488.0K | 0.01% | −50,057−27.0% | Reduced |
| HSBC Holdings PLC | 132,221 | $474.0K | 0.00% | +59,095+80.8% | Added |
| Jacobs Levy Equity Management, Inc | 124,821 | $450.6K | 0.00% | +124,821 | New |
| Stifel Financial Corp | 123,416 | $445.5K | 0.00% | +63,005+104.3% | Added |
| Rhumbline Advisers | 121,513 | $438.7K | 0.00% | −9,230−7.1% | Reduced |
| Baird Financial Group, Inc. | 119,440 | $431.2K | 0.00% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 114,128 | $412.0K | 0.01% | −108,814−48.8% | Reduced |
| Wealth Effects LLC | 111,750 | $403.4K | 0.13% | +51,900+86.7% | Added |
| JPMorgan Chase & Co | 104,532 | $377.4K | 0.00% | +5,341+5.4% | Added |
| Silvercrest Asset Management Group LLC | 103,500 | $373.6K | 0.00% | 00.0% | Unchanged |
| Summit Financial Wealth Advisors, LLC | 103,288 | $372.9K | 0.05% | +7,000+7.3% | Added |
| Janney Montgomery Scott LLC | 102,610 | $370.0K | 0.00% | +44,050+75.2% | Added |
| Nomura Asset Management International Inc. | 100,000 | $361.0K | 0.00% | +100,000 | New |
| Engineers Gate Manager LP | 87,264 | $315.0K | 0.00% | +46,221+112.6% | Added |
| Alps Advisors Inc | 85,677 | $309.3K | 0.00% | +85,677 | New |
| Deutsche Bank AG | 79,940 | $288.6K | 0.00% | +3,047+4.0% | Added |
| Caption Management, LLC | 74,438 | $268.7K | 0.01% | −55,562−42.7% | Reduced |
| Ameriprise Financial Inc | 73,838 | $266.6K | 0.00% | −474−0.6% | Reduced |
| Profund Advisors LLC | 72,298 | $261.0K | 0.01% | +38,586+114.5% | Added |
| Alliancebernstein L.P. | 71,760 | $259.1K | 0.00% | 00.0% | Unchanged |
| Verition Fund Management LLC | 69,476 | $250.8K | 0.00% | +38,322+123.0% | Added |
| Walleye Capital LLC | 65,665 | $237.1K | 0.00% | +50,147+323.2% | Added |
| LMR Partners LLP | 61,300 | $221.3K | 0.00% | +61,300 | New |
| Balyasny Asset Management LLC | 60,109 | $217.0K | 0.00% | +60,109 | New |
| Virtu Financial LLC | 58,477 | $211.0K | 0.01% | +10,409+21.7% | Added |
| Blair William & Co | 56,434 | $203.7K | 0.00% | +56,434 | New |
| Raymond James Financial Inc | 55,859 | $201.7K | 0.00% | +28,187+101.9% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 52,566 | $189.8K | 0.00% | +6,661+14.5% | Added |
| Intech Investment Management LLC | 52,557 | $189.7K | 0.00% | +13,918+36.0% | Added |
| Bridgeway Capital Management, LLC | 50,600 | $182.7K | 0.00% | 00.0% | Unchanged |
| Virtus Investment Advisers, Inc. | 50,482 | $182.2K | 0.05% | +34,568+217.2% | Added |
| Price T Rowe Associates Inc | 49,879 | $181.0K | 0.00% | +8,386+20.2% | Added |
| LPL Financial LLC | 48,626 | $175.5K | 0.00% | −12,898−21.0% | Reduced |
| Voleon Capital Management LP | 47,055 | $169.9K | 0.00% | +47,055 | New |
| Creative Planning | 46,886 | $169.3K | 0.00% | +10,508+28.9% | Added |
| Rockefeller Capital Management L.P. | 43,167 | $155.8K | 0.00% | +43,113+79,838.9% | Added |
| MetLife Investment Management | 38,193 | $137.9K | 0.00% | −6,341−14.2% | Reduced |
| Kingswood Wealth Advisors, LLC | 36,000 | $130.0K | 0.01% | +20,600+133.8% | Added |
| Acadian Asset Management LLC | 35,732 | $128.0K | 0.00% | +35,732 | New |
| Kovack Advisors, Inc. | 35,215 | $127.1K | 0.01% | +35,215 | New |
| Squarepoint Ops LLC | 34,949 | $126.2K | 0.00% | −549,747−94.0% | Reduced |
| MML Investors Services, LLC | 34,550 | $124.7K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 31,372 | $113.3K | 0.00% | −108,883−77.6% | Reduced |
| Fox Run Management, L.L.C. | 30,603 | $110.5K | 0.02% | +30,603 | New |
| Canada Pension Plan Investment Board | 30,000 | $108.3K | 0.00% | +30,000 | New |
| Cetera Investment Advisers | 29,687 | $107.2K | 0.00% | +9,481+46.9% | Added |
| Citigroup Inc | 28,324 | $102.3K | 0.00% | +18,550+189.8% | Added |
| Farallon Capital Management, L.L.C. | 27,600 | $99.6K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 27,596 | $99.6K | 0.00% | +1,609+6.2% | Added |
| Royal Bank of Canada | 27,414 | $99.0K | 0.00% | −39,319−58.9% | Reduced |
| Concurrent Investment Advisors, LLC | 26,508 | $95.7K | 0.00% | +2,500+10.4% | Added |
| Axq Capital, LP | 25,701 | $92.8K | 0.02% | +5,266+25.8% | Added |
| Police & Firemen's Retirement System of New Jersey | 23,573 | $85.1K | 0.00% | 00.0% | Unchanged |
| DRW Securities, LLC | 22,469 | $81.1K | 0.01% | +22,469 | New |
| New York State Common Retirement Fund | 21,447 | $77.4K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 21,147 | $76.3K | 0.00% | +21,147 | New |