ALT Altimmune, Inc.
Altimmune, Inc. (ALT) Institutional Ownership
What the institutions did with ALT last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 20.4M | 13.5% |
| Deep Track Capital, LP | 19.3M | 12.7% |
| STATE STREET CORP | 12.1M | 8.0% |
| TCG Crossover Management, LLC | 10.0M | 6.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 8.2M | 5.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.3M | 4.8% |
| MARSHALL WACE, LLP | 6.8M | 4.5% |
| VIKING GLOBAL INVESTORS LP | 6.7M | 4.4% |
| RA CAPITAL MANAGEMENT, L.P. | 6.5M | 4.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 5.0M | 3.3% |
| Woodline Partners LP | 3.4M | 2.2% |
| MILLENNIUM MANAGEMENT LLC | 3.3M | 2.2% |
| Nantahala Capital Management, LLC | 3.0M | 2.0% |
| Trails Edge Capital Partners, LP | 2.7M | 1.8% |
| Nuveen, LLC | 2.4M | 1.6% |
| TWO SIGMA INVESTMENTS, LP | 2.4M | 1.6% |
| GOLDMAN SACHS GROUP INC | 2.2M | 1.5% |
| GREAT POINT PARTNERS LLC | 1.7M | 1.1% |
| NORTHERN TRUST CORP | 1.6M | 1.1% |
| Weiss Asset Management LP | 1.5M | 1.0% |
| VANGUARD FIDUCIARY TRUST CO | 1.3M | 0.9% |
| Cormorant Asset Management, LP | 1.3M | 0.8% |
| AQR CAPITAL MANAGEMENT LLC | 1.2M | 0.8% |
| CITADEL ADVISORS LLC | 983.6K | 0.6% |
| UBS Group AG | 866.4K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Deep Track Capital, LP | New | 0 | 19.3M | +19.3M |
| TCG Crossover Management, LLC | New | 0 | 10.0M | +10.0M |
| BlackRock, Inc. | Increased | 12.8M | 20.4M | +7.6M |
| VIKING GLOBAL INVESTORS LP | New | 0 | 6.7M | +6.7M |
| RA CAPITAL MANAGEMENT, L.P. | New | 0 | 6.5M | +6.5M |
| STATE STREET CORP | Increased | 7.1M | 12.1M | +5.0M |
| Woodline Partners LP | New | 0 | 3.4M | +3.4M |
| Nantahala Capital Management, LLC | New | 0 | 3.0M | +3.0M |
| MARSHALL WACE, LLP | Increased | 4.0M | 6.8M | +2.8M |
| Trails Edge Capital Partners, LP | New | 0 | 2.7M | +2.7M |
| Alyeska Investment Group, L.P. | Sold Out | 2.6M | 0 | -2.6M |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 5.7M | 8.2M | +2.5M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 5.4M | 7.3M | +1.9M |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.1M | 5.0M | +1.9M |
| GREAT POINT PARTNERS LLC | New | 0 | 1.7M | +1.7M |
| Weiss Asset Management LP | New | 0 | 1.5M | +1.5M |
| Cormorant Asset Management, LP | New | 0 | 1.3M | +1.3M |
| AQR CAPITAL MANAGEMENT LLC | Increased | 85.5K | 1.2M | +1.1M |
| GOLDMAN SACHS GROUP INC | Increased | 1.4M | 2.2M | +863.8K |
| Ghisallo Capital Management LLC | New | 0 | 750.0K | +750.0K |
| SCHRODER INVESTMENT MANAGEMENT GROUP | Sold Out | 667.8K | 0 | -667.8K |
| NORTHERN TRUST CORP | Increased | 996.7K | 1.6M | +602.5K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 1.3M | 731.1K | -594.9K |
| CITADEL ADVISORS LLC | Increased | 448.9K | 983.6K | +534.7K |
| D. E. Shaw & Co., Inc. | Reduced | 727.0K | 201.6K | -525.4K |
| Rock Springs Capital Management LP | New | 0 | 471.5K | +471.5K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 869.3K | 1.3M | +423.7K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.0M | 639.4K | -406.5K |
| Hennion & Walsh Asset Management, Inc. | Increased | 202.0K | 518.2K | +316.2K |
| LMR Partners LLP | New | 0 | 300.0K | +300.0K |
| Bank of New York Mellon Corp | Increased | 413.5K | 689.7K | +276.2K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 351.7K | 624.5K | +272.8K |
| CITIGROUP INC | Increased | 76.3K | 293.9K | +217.6K |
| Jump Financial, LLC | New | 0 | 190.0K | +190.0K |
| BANK OF AMERICA CORP /DE/ | Increased | 570.2K | 757.9K | +187.7K |
| Squarepoint Ops LLC | Increased | 18.1K | 202.4K | +184.3K |
| Creative Planning | Increased | 39.2K | 218.3K | +179.1K |
| Point72 Asset Management, L.P. | Reduced | 665.3K | 486.9K | -178.4K |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 248.2K | 420.3K | +172.1K |
| BARCLAYS PLC | Increased | 192.9K | 351.6K | +158.7K |
| RHUMBLINE ADVISERS | Increased | 155.7K | 309.6K | +153.9K |
| Birchview Capital, LP | New | 0 | 152.7K | +152.7K |
| Janney Montgomery Scott LLC | Increased | 172.6K | 302.6K | +130.0K |
| XTX Topco Ltd | New | 0 | 128.1K | +128.1K |
| WELLS FARGO & COMPANY/MN | Increased | 95.9K | 217.4K | +121.5K |
| Invesco Ltd. | Increased | 227.9K | 332.6K | +104.7K |
| Susquehanna Portfolio Strategies, LLC | New | 0 | 103.4K | +103.4K |
| ADAR1 Capital Management, LLC | New | 0 | 102.8K | +102.8K |
| Mariner, LLC | New | 0 | 101.1K | +101.1K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 2.5M | 2.4M | -97.8K |
| ALPS ADVISORS INC | Increased | 105.9K | 197.4K | +91.5K |
| HSBC HOLDINGS PLC | Reduced | 154.4K | 64.5K | -89.9K |
| Engineers Gate Manager LP | Reduced | 116.1K | 38.0K | -78.1K |
| FMR LLC | Increased | 674.0K | 749.0K | +75.0K |
| Virtus Investment Advisers, LLC | Increased | 51.7K | 125.4K | +73.6K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 92.5K | 165.4K | +72.9K |
| RENAISSANCE TECHNOLOGIES LLC | New | 0 | 71.6K | +71.6K |
| Nuveen, LLC | Increased | 2.3M | 2.4M | +70.8K |
| Virtu Financial LLC | Sold Out | 70.5K | 0 | -70.5K |
| DEUTSCHE BANK AG\ | Increased | 124.5K | 195.0K | +70.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.