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 |
|---|---|---|---|---|---|
| Cerity Partners LLC | 35,469 | $107.8K | 0.00% | +35,469 | New |
| Kovack Advisors, Inc. | 36,000 | $109.4K | 0.01% | −250−0.7% | Reduced |
| Engineers Gate Manager LP | 38,037 | $115.6K | 0.00% | −78,075−67.2% | Reduced |
| Voya Investment Management LLC | 39,783 | $120.9K | 0.00% | +18,772+89.3% | Added |
| Russell Investments Group, Ltd. | 43,696 | $132.8K | 0.00% | +27,604+171.5% | Added |
| Graham Capital Management, L.P. | 44,940 | $136.6K | 0.00% | +44,940 | New |
| Quantbot Technologies LP | 45,632 | $138.7K | 0.01% | +45,632 | New |
| Intech Investment Management LLC | 45,911 | $139.6K | 0.00% | +15,150+49.3% | Added |
| Caption Management, LLC | 46,617 | $141.7K | 0.00% | −27,821−37.4% | Reduced |
| SG Americas Securities, LLC | 47,089 | $143.0K | 0.00% | −8,536−15.3% | Reduced |
| Rockefeller Capital Management L.P. | 49,740 | $151.2K | 0.00% | +3,370+7.3% | Added |
| Cetera Investment Advisers | 51,901 | $157.8K | 0.00% | +16,448+46.4% | Added |
| Manufacturers Life Insurance Company, The | 52,036 | $158.2K | 0.00% | +17,273+49.7% | Added |
| New York State Common Retirement Fund | 52,747 | $160.4K | 0.00% | +31,300+145.9% | Added |
| Mercer Global Advisors Inc | 53,115 | $161.5K | 0.00% | +53,115 | New |
| CI Private Wealth, LLC | 54,226 | $164.8K | 0.00% | +23,673+77.5% | Added |
| Envestnet Asset Management Inc | 56,743 | $172.5K | 0.00% | +56,743 | New |
| Axq Capital, LP | 56,810 | $172.7K | 0.02% | +9,058+19.0% | Added |
| Police & Firemen's Retirement System of New Jersey | 58,625 | $178.2K | 0.00% | +23,192+65.5% | Added |
| Leonteq Securities AG | 64,000 | $194.6K | 0.01% | −1,000−1.5% | Reduced |
| HSBC Holdings PLC | 64,460 | $199.5K | 0.00% | −89,905−58.2% | Reduced |
| PVG Asset Management Corp | 66,120 | $201.0K | 0.12% | 00.0% | Unchanged |
| Ieq Capital, LLC | 66,954 | $203.5K | 0.00% | +66,954 | New |
| Ameriprise Financial Inc | 68,571 | $208.5K | 0.00% | −3,397−4.7% | Reduced |
| Renaissance Technologies LLC | 71,600 | $217.7K | 0.00% | +71,600 | New |
| Kingswood Wealth Advisors, LLC | 74,500 | $226.5K | 0.01% | −2,000−2.6% | Reduced |
| Vanguard Global Advisers, LLC | 75,045 | $228.1K | 0.00% | +32,219+75.2% | Added |
| Grantham, Mayo, Van Otterloo & Co. LLC | 83,837 | $254.9K | 0.00% | −42,552−33.7% | Reduced |
| Canada Pension Plan Investment Board | 87,300 | $265.4K | 0.00% | +34,000+63.8% | Added |
| Nomura Asset Management International Inc. | 100,000 | $304.0K | 0.00% | 00.0% | Unchanged |
| Mariner, LLC | 101,123 | $307.4K | 0.00% | +101,123 | New |
| ADAR1 Capital Management, LLC | 102,823 | $312.6K | 0.01% | +102,823 | New |
| JPMorgan Chase & Co | 106,625 | $313.5K | 0.00% | −20,873−16.4% | Reduced |
| Summit Financial Wealth Advisors, LLC | 103,288 | $314.0K | 0.04% | 00.0% | Unchanged |
| Susquehanna Portfolio Strategies, LLC | 103,374 | $314.3K | 0.01% | +103,374 | New |
| Silvercrest Asset Management Group LLC | 103,500 | $314.6K | 0.00% | 00.0% | Unchanged |
| Jefferies Financial Group Inc. | 110,000 | $334.4K | 0.00% | 00.0% | Unchanged |
| Profund Advisors LLC | 113,598 | $345.3K | 0.01% | +10,457+10.1% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 117,682 | $355.1K | 0.00% | +40,390+52.3% | Added |
| MetLife Investment Management | 116,856 | $355.2K | 0.00% | +44,643+61.8% | Added |
| LPL Financial LLC | 121,952 | $370.7K | 0.00% | +18,196+17.5% | Added |
| Wealth Effects LLC | 122,650 | $372.9K | 0.10% | −9,300−7.0% | Reduced |
| Virtus Investment Advisers, Inc. | 125,363 | $381.1K | 0.09% | +73,620+142.3% | Added |
| XTX Topco Ltd | 128,088 | $389.4K | 0.01% | +128,088 | New |
| Brevan Howard Capital Management LP | 130,781 | $397.6K | 0.01% | +52,378+66.8% | Added |
| Alliancebernstein L.P. | 140,850 | $433.8K | 0.00% | +69,090+96.3% | Added |
| Birchview Capital, LP | 152,681 | $464.1K | 0.22% | +152,681 | New |
| Knoll Capital Management, LLC | 160,000 | $486.4K | 0.23% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 165,390 | $503.0K | 0.00% | +72,878+78.8% | Added |
| Man Group plc | 173,872 | $528.6K | 0.00% | +44,026+33.9% | Added |
| Jump Financial, LLC | 190,000 | $577.6K | 0.01% | +190,000 | New |
| Stifel Financial Corp | 192,368 | $584.8K | 0.00% | +57,752+42.9% | Added |
| Deutsche Bank AG | 195,014 | $592.8K | 0.00% | +70,498+56.6% | Added |
| Alps Advisors Inc | 197,374 | $600.0K | 0.00% | +91,493+86.4% | Added |
| D. E. Shaw & Co., Inc. | 201,638 | $613.0K | 0.00% | −525,363−72.3% | Reduced |
| Squarepoint Ops LLC | 202,380 | $615.2K | 0.00% | +184,254+1,016.5% | Added |
| Commonwealth Equity Services, LLC | 214,574 | $652.3K | 0.00% | +54,200+33.8% | Added |
| Wells Fargo & Company | 217,430 | $661.0K | 0.00% | +121,523+126.7% | Added |
| Creative Planning | 218,281 | $663.6K | 0.00% | +179,052+456.4% | Added |
| Rafferty Asset Management, LLC | 225,060 | $684.2K | 0.00% | −6,211−2.7% | Reduced |
| Brown Wealth Management, LLC | 236,136 | $717.9K | 0.16% | 00.0% | Unchanged |
| Baird Financial Group, Inc. | 237,522 | $722.1K | 0.00% | 00.0% | Unchanged |
| Mangrove Partners | 239,280 | $727.4K | 0.05% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 266,671 | $810.7K | 0.00% | +14,890+5.9% | Added |
| Citigroup Inc | 293,948 | $893.6K | 0.00% | +217,621+285.1% | Added |
| LMR Partners LLP | 300,000 | $912.0K | 0.01% | +300,000 | New |
| Janney Montgomery Scott LLC | 302,610 | $920.0K | 0.00% | +130,000+75.3% | Added |
| Rhumbline Advisers | 309,606 | $941.2K | 0.00% | +153,935+98.9% | Added |
| Invesco Ltd. | 332,592 | $1.01M | 0.00% | +104,735+46.0% | Added |
| Barclays PLC | 351,587 | $1.07M | 0.00% | +158,716+82.3% | Added |
| BNP Paribas Arbitrage, SA | 371,176 | $1.13M | 0.00% | −63,902−14.7% | Reduced |
| Wellington Management Group LLP | 420,300 | $1.28M | 0.00% | +172,142+69.4% | Added |
| Beirne Wealth Consulting Services, LLC | 421,858 | $1.28M | 0.26% | +10,000+2.4% | Added |
| Rock Springs Capital Management LP | 471,465 | $1.43M | 0.07% | +471,465 | New |
| Point72 Asset Management, L.P. | 486,884 | $1.48M | 0.00% | −178,405−26.8% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 518,198 | $1.58M | 0.04% | +316,209+156.5% | Added |
| Charles Schwab Investment Management Inc | 624,499 | $1.90M | 0.00% | +272,818+77.6% | Added |
| Dimensional Fund Advisors LP | 639,436 | $1.94M | 0.00% | −406,490−38.9% | Reduced |
| Tang Capital Management LLC | 666,022 | $2.02M | 0.09% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 689,713 | $2.10M | 0.00% | +276,210+66.8% | Added |
| Susquehanna International Group, LLP | 731,078 | $2.22M | 0.00% | −594,878−44.9% | Reduced |
| FMR LLC | 748,974 | $2.28M | 0.00% | +75,010+11.1% | Added |
| Ghisallo Capital Management LLC | 750,000 | $2.28M | 0.04% | +750,000 | New |
| Bank of America Corp | 757,919 | $2.30M | 0.00% | +187,716+32.9% | Added |
| Morgan Stanley | 758,435 | $2.31M | 0.00% | −16,823−2.2% | Reduced |
| UBS Group AG | 866,385 | $2.63M | 0.00% | −38,383−4.2% | Reduced |
| Citadel Advisors LLC | 983,559 | $2.99M | 0.00% | +534,686+119.1% | Added |
| AQR Capital Management LLC | 1,220,949 | $3.71M | 0.00% | +1,135,495+1,328.8% | Added |
| Cormorant Asset Management, LP | 1,250,000 | $3.80M | 0.19% | +1,250,000 | New |
| Vanguard Fiduciary Trust Co | 1,293,001 | $3.93M | 0.00% | +423,683+48.7% | Added |
| Nantahala Capital Management, LLC | 1,500,000 | $4.56M | 0.28% | +1,500,000 | New |
| Weiss Asset Management LP | 1,530,803 | $4.65M | 0.05% | +1,530,803 | New |
| Northern Trust Corp | 1,599,226 | $4.86M | 0.00% | +602,505+60.4% | Added |
| Great Point Partners LLC | 1,741,232 | $5.29M | 1.25% | +1,741,232 | New |
| Goldman Sachs Group Inc | 2,214,450 | $6.73M | 0.00% | +863,801+64.0% | Added |
| Two Sigma Investments, LP | 2,381,142 | $7.24M | 0.01% | −97,758−3.9% | Reduced |
| Nuveen, LLC | 2,405,354 | $7.31M | 0.00% | +70,753+3.0% | Added |
| Trails Edge Capital Partners, LP | 2,660,000 | $8.09M | 1.28% | +2,660,000 | New |
| Millennium Management LLC | 3,309,122 | $10.1M | 0.01% | +50,931+1.6% | Added |
| Woodline Partners LP | 3,400,312 | $10.3M | 0.03% | +3,400,312 | New |