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, Q2 2026
Institutional positions in Altimmune, Inc. as of Jun 30, 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
- 210
- +40 vs. Q1 2026
- Shares held
- 150.0M
- +80.7M (+116.4%) vs. Q1 2026
- Total value
- $456.1M
- +$242.7M (+113.7%) vs. Q1 2026
- New holders
- 58
- 86 more added
- Sold out
- 18
- 33 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Altimmune, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 20,385,284 | $62.0M | 0.00% | +7,590,007+59.3% | Added |
| Deep Track Capital, LP | 19,250,000 | $58.5M | 0.86% | +19,250,000 | New |
| State Street Corp | 12,098,540 | $36.8M | 0.00% | +4,952,990+69.3% | Added |
| TCG Crossover Management, LLC | 10,000,000 | $30.4M | 0.73% | +10,000,000 | New |
| Vanguard Capital Management LLC | 8,177,752 | $24.9M | 0.00% | +2,519,703+44.5% | Added |
| Vanguard Portfolio Management LLC | 7,330,265 | $22.3M | 0.00% | +1,948,263+36.2% | Added |
| Marshall Wace, LLP | 6,841,055 | $20.8M | 0.02% | +2,823,154+70.3% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 6,700,000 | $20.4M | 0.06% | +6,700,000 | New |
| Ra Capital Management, L.P. | 6,500,000 | $19.8M | 0.17% | +6,500,000 | New |
| Geode Capital Management, LLC | 5,011,314 | $15.2M | 0.00% | +1,904,218+61.3% | Added |
| Woodline Partners LP | 3,400,312 | $10.3M | 0.03% | +3,400,312 | New |
| Millennium Management LLC | 3,309,122 | $10.1M | 0.01% | +50,931+1.6% | Added |
| Trails Edge Capital Partners, LP | 2,660,000 | $8.09M | 1.28% | +2,660,000 | New |
| Nuveen, LLC | 2,405,354 | $7.31M | 0.00% | +70,753+3.0% | Added |
| Two Sigma Investments, LP | 2,381,142 | $7.24M | 0.01% | −97,758−3.9% | Reduced |
| Goldman Sachs Group Inc | 2,214,450 | $6.73M | 0.00% | +863,801+64.0% | Added |
| Great Point Partners LLC | 1,741,232 | $5.29M | 1.25% | +1,741,232 | New |
| Northern Trust Corp | 1,599,226 | $4.86M | 0.00% | +602,505+60.4% | Added |
| Weiss Asset Management LP | 1,530,803 | $4.65M | 0.05% | +1,530,803 | New |
| Nantahala Capital Management, LLC | 1,500,000 | $4.56M | 0.28% | +1,500,000 | New |
| Vanguard Fiduciary Trust Co | 1,293,001 | $3.93M | 0.00% | +423,683+48.7% | Added |
| Cormorant Asset Management, LP | 1,250,000 | $3.80M | 0.19% | +1,250,000 | New |
| AQR Capital Management LLC | 1,220,949 | $3.71M | 0.00% | +1,135,495+1,328.8% | Added |
| Citadel Advisors LLC | 983,559 | $2.99M | 0.00% | +534,686+119.1% | Added |
| UBS Group AG | 866,385 | $2.63M | 0.00% | −38,383−4.2% | Reduced |
| Morgan Stanley | 758,435 | $2.31M | 0.00% | −16,823−2.2% | Reduced |
| Bank of America Corp | 757,919 | $2.30M | 0.00% | +187,716+32.9% | Added |
| Ghisallo Capital Management LLC | 750,000 | $2.28M | 0.04% | +750,000 | New |
| FMR LLC | 748,974 | $2.28M | 0.00% | +75,010+11.1% | Added |
| Susquehanna International Group, LLP | 731,078 | $2.22M | 0.00% | −594,878−44.9% | Reduced |
| Bank of New York Mellon Corp | 689,713 | $2.10M | 0.00% | +276,210+66.8% | Added |
| Tang Capital Management LLC | 666,022 | $2.02M | 0.09% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 639,436 | $1.94M | 0.00% | −406,490−38.9% | Reduced |
| Charles Schwab Investment Management Inc | 624,499 | $1.90M | 0.00% | +272,818+77.6% | Added |
| Hennion & Walsh Asset Management, Inc. | 518,198 | $1.58M | 0.04% | +316,209+156.5% | Added |
| Point72 Asset Management, L.P. | 486,884 | $1.48M | 0.00% | −178,405−26.8% | Reduced |
| Rock Springs Capital Management LP | 471,465 | $1.43M | 0.07% | +471,465 | New |
| Beirne Wealth Consulting Services, LLC | 421,858 | $1.28M | 0.26% | +10,000+2.4% | Added |
| Wellington Management Group LLP | 420,300 | $1.28M | 0.00% | +172,142+69.4% | Added |
| BNP Paribas Arbitrage, SA | 371,176 | $1.13M | 0.00% | −63,902−14.7% | Reduced |
| Barclays PLC | 351,587 | $1.07M | 0.00% | +158,716+82.3% | Added |
| Invesco Ltd. | 332,592 | $1.01M | 0.00% | +104,735+46.0% | Added |
| Rhumbline Advisers | 309,606 | $941.2K | 0.00% | +153,935+98.9% | Added |
| Janney Montgomery Scott LLC | 302,610 | $920.0K | 0.00% | +130,000+75.3% | Added |
| LMR Partners LLP | 300,000 | $912.0K | 0.01% | +300,000 | New |
| Citigroup Inc | 293,948 | $893.6K | 0.00% | +217,621+285.1% | Added |
| Steward Partners Investment Advisory, LLC | 266,671 | $810.7K | 0.00% | +14,890+5.9% | Added |
| Mangrove Partners | 239,280 | $727.4K | 0.05% | 00.0% | Unchanged |
| Baird Financial Group, Inc. | 237,522 | $722.1K | 0.00% | 00.0% | Unchanged |
| Brown Wealth Management, LLC | 236,136 | $717.9K | 0.16% | 00.0% | Unchanged |
| Rafferty Asset Management, LLC | 225,060 | $684.2K | 0.00% | −6,211−2.7% | Reduced |
| Creative Planning | 218,281 | $663.6K | 0.00% | +179,052+456.4% | Added |
| Wells Fargo & Company | 217,430 | $661.0K | 0.00% | +121,523+126.7% | Added |
| Commonwealth Equity Services, LLC | 214,574 | $652.3K | 0.00% | +54,200+33.8% | Added |
| Squarepoint Ops LLC | 202,380 | $615.2K | 0.00% | +184,254+1,016.5% | Added |
| D. E. Shaw & Co., Inc. | 201,638 | $613.0K | 0.00% | −525,363−72.3% | Reduced |
| Alps Advisors Inc | 197,374 | $600.0K | 0.00% | +91,493+86.4% | Added |
| Deutsche Bank AG | 195,014 | $592.8K | 0.00% | +70,498+56.6% | Added |
| Stifel Financial Corp | 192,368 | $584.8K | 0.00% | +57,752+42.9% | Added |
| Jump Financial, LLC | 190,000 | $577.6K | 0.01% | +190,000 | New |
| Man Group plc | 173,872 | $528.6K | 0.00% | +44,026+33.9% | Added |
| Price T Rowe Associates Inc | 165,390 | $503.0K | 0.00% | +72,878+78.8% | Added |
| Knoll Capital Management, LLC | 160,000 | $486.4K | 0.23% | 00.0% | Unchanged |
| Birchview Capital, LP | 152,681 | $464.1K | 0.22% | +152,681 | New |
| Alliancebernstein L.P. | 140,850 | $433.8K | 0.00% | +69,090+96.3% | Added |
| Brevan Howard Capital Management LP | 130,781 | $397.6K | 0.01% | +52,378+66.8% | Added |
| XTX Topco Ltd | 128,088 | $389.4K | 0.01% | +128,088 | New |
| Virtus Investment Advisers, Inc. | 125,363 | $381.1K | 0.09% | +73,620+142.3% | Added |
| Wealth Effects LLC | 122,650 | $372.9K | 0.10% | −9,300−7.0% | Reduced |
| LPL Financial LLC | 121,952 | $370.7K | 0.00% | +18,196+17.5% | Added |
| MetLife Investment Management | 116,856 | $355.2K | 0.00% | +44,643+61.8% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 117,682 | $355.1K | 0.00% | +40,390+52.3% | Added |
| Profund Advisors LLC | 113,598 | $345.3K | 0.01% | +10,457+10.1% | Added |
| Jefferies Financial Group Inc. | 110,000 | $334.4K | 0.00% | 00.0% | Unchanged |
| Silvercrest Asset Management Group LLC | 103,500 | $314.6K | 0.00% | 00.0% | Unchanged |
| Susquehanna Portfolio Strategies, LLC | 103,374 | $314.3K | 0.01% | +103,374 | New |
| Summit Financial Wealth Advisors, LLC | 103,288 | $314.0K | 0.04% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 106,625 | $313.5K | 0.00% | −20,873−16.4% | Reduced |
| ADAR1 Capital Management, LLC | 102,823 | $312.6K | 0.01% | +102,823 | New |
| Mariner, LLC | 101,123 | $307.4K | 0.00% | +101,123 | New |
| Nomura Asset Management International Inc. | 100,000 | $304.0K | 0.00% | 00.0% | Unchanged |
| Canada Pension Plan Investment Board | 87,300 | $265.4K | 0.00% | +34,000+63.8% | Added |
| Grantham, Mayo, Van Otterloo & Co. LLC | 83,837 | $254.9K | 0.00% | −42,552−33.7% | Reduced |
| Vanguard Global Advisers, LLC | 75,045 | $228.1K | 0.00% | +32,219+75.2% | Added |
| Kingswood Wealth Advisors, LLC | 74,500 | $226.5K | 0.01% | −2,000−2.6% | Reduced |
| Renaissance Technologies LLC | 71,600 | $217.7K | 0.00% | +71,600 | New |
| Ameriprise Financial Inc | 68,571 | $208.5K | 0.00% | −3,397−4.7% | Reduced |
| Ieq Capital, LLC | 66,954 | $203.5K | 0.00% | +66,954 | New |
| PVG Asset Management Corp | 66,120 | $201.0K | 0.12% | 00.0% | Unchanged |
| HSBC Holdings PLC | 64,460 | $199.5K | 0.00% | −89,905−58.2% | Reduced |
| Leonteq Securities AG | 64,000 | $194.6K | 0.01% | −1,000−1.5% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 58,625 | $178.2K | 0.00% | +23,192+65.5% | Added |
| Axq Capital, LP | 56,810 | $172.7K | 0.02% | +9,058+19.0% | Added |
| Envestnet Asset Management Inc | 56,743 | $172.5K | 0.00% | +56,743 | New |
| CI Private Wealth, LLC | 54,226 | $164.8K | 0.00% | +23,673+77.5% | Added |
| Mercer Global Advisors Inc | 53,115 | $161.5K | 0.00% | +53,115 | New |
| New York State Common Retirement Fund | 52,747 | $160.4K | 0.00% | +31,300+145.9% | Added |
| Manufacturers Life Insurance Company, The | 52,036 | $158.2K | 0.00% | +17,273+49.7% | Added |
| Cetera Investment Advisers | 51,901 | $157.8K | 0.00% | +16,448+46.4% | Added |
| Rockefeller Capital Management L.P. | 49,740 | $151.2K | 0.00% | +3,370+7.3% | Added |