ATOS Atossa Therapeutics, Inc.
Atossa Therapeutics, Inc. (ATOS) Institutional Ownership
What the institutions did with ATOS 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 |
|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | 361.7K | 26.9% |
| AMERIPRISE FINANCIAL INC | 258.2K | 19.2% |
| BlackRock, Inc. | 164.4K | 12.2% |
| RENAISSANCE TECHNOLOGIES LLC | 132.0K | 9.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 92.4K | 6.9% |
| UBS Group AG | 82.6K | 6.1% |
| JANE STREET GROUP, LLC | 56.6K | 4.2% |
| VANGUARD FIDUCIARY TRUST CO | 52.6K | 3.9% |
| MILLENNIUM MANAGEMENT LLC | 46.5K | 3.5% |
| STATE STREET CORP | 39.8K | 3.0% |
| NORTHERN TRUST CORP | 20.2K | 1.5% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 15.6K | 1.2% |
| MORGAN STANLEY | 12.3K | 0.9% |
| Vanguard Global Advisers, LLC | 3.1K | 0.2% |
| JONES FINANCIAL COMPANIES LLLP | 2.1K | 0.2% |
| ROYAL BANK OF CANADA | 2.0K | 0.1% |
| MCF Advisors LLC | 1.1K | 0.1% |
| OSAIC HOLDINGS, INC. | 587 | 0.0% |
| JPMORGAN CHASE & CO | 390 | 0.0% |
| Rockefeller Capital Management L.P. | 333 | 0.0% |
| WELLS FARGO & COMPANY/MN | 228 | 0.0% |
| SBI Securities Co., Ltd. | 148 | 0.0% |
| HARBOUR INVESTMENTS, INC. | 110 | 0.0% |
| TD Waterhouse Canada Inc. | 103 | 0.0% |
| BNP PARIBAS FINANCIAL MARKETS | 87 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| JANE STREET GROUP, LLC | New | 0 | 56.6K | +56.6K |
| BlackRock, Inc. | Increased | 133.2K | 164.4K | +31.2K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 109.0K | 132.0K | +23.0K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 66.7K | 46.5K | -20.2K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | 0 | 15.6K | +15.6K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 349.1K | 361.7K | +12.7K |
| UBS Group AG | Reduced | 92.0K | 82.6K | -9.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 97.1K | 92.4K | -4.7K |
| MORGAN STANLEY | Reduced | 16.2K | 12.3K | -3.9K |
| AMERIPRISE FINANCIAL INC | Increased | 255.1K | 258.2K | +3.1K |
| ROYAL BANK OF CANADA | Increased | 644 | 2.0K | +1.4K |
| MCF Advisors LLC | New | 0 | 1.1K | +1.1K |
| NORTHERN TRUST CORP | Increased | 19.2K | 20.2K | +1.0K |
| Tower Research Capital LLC (TRC) | Sold Out | 863 | 0 | -863 |
| GROUP ONE TRADING LLC | Reduced | 609 | 54 | -555 |
| VANGUARD FIDUCIARY TRUST CO | Increased | 52.2K | 52.6K | +348 |
| NewEdge Advisors, LLC | Sold Out | 333 | 0 | -333 |
| Avion Wealth | Sold Out | 318 | 0 | -318 |
| Robinswood Financial LLC | Sold Out | 170 | 0 | -170 |
| North Star Investment Management Corp. | Sold Out | 80 | 0 | -80 |
| WELLS FARGO & COMPANY/MN | Reduced | 296 | 228 | -68 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | Sold Out | 46 | 0 | -46 |
| Allworth Financial LP | Sold Out | 46 | 0 | -46 |
| SBI Securities Co., Ltd. | Increased | 113 | 148 | +35 |
| Rockefeller Capital Management L.P. | Reduced | 353 | 333 | -20 |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 98 | 87 | -11 |
| JPMORGAN CHASE & CO | Increased | 383 | 390 | +7 |
| BESSEMER GROUP INC | New | 0 | 6 | +6 |
| Caitong International Asset Management Co., Ltd | New | 0 | 6 | +6 |
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.