Atossa TherapeuticsATOS
13F holders, Q4 2025 (December 31)66holders −1
13new positions
12sold out
4famous investors
$0.59avg. 13F price*
At the end of Q4 2025, 66 institutions reported holding Atossa Therapeutics Inc. (ATOS) in their 13F filings, down 1 from Q3 2025. 13 opened new positions and 12 sold out. The largest holders were Vanguard Group Inc. ($3.6M), Ameriprise Financial Inc. ($2.2M) and Renaissance Technologies ($1.2M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Atossa Therapeutics Inc.
- CUSIP
- 04962H506
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 13 | $754K |
| Exits | 12 | $686K |
All 13F filers, Q3 2025 → Q4 2025: 4,057,023 shares bought and 1,440,591 shares sold, net +2,616,432 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 66 holders
| Vanguard Group Inc. | 0.00% | Add +1.1% | 6,147,838 | $3.6M |
| Ameriprise Financial Inc. | 0.00% | Add +28.4% | 3,791,061 | $2.2M |
| Renaissance Technologies | 0.00% | Add +33.2% | 2,062,838 | $1.2M |
| BlackRock, Inc. | 0.00% | No change | 1,997,627 | $1.2M |
| Geode Capital Management, LLC | 0.00% | Add +0.7% | 1,371,909 | $810K |
| Millennium Management | 0.00% | Reduce -25.5% | 1,242,868 | $733K |
| Jacobs Levy Equity Management, Inc. | 0.00% | New | 1,048,289 | $618K |
| Citadel Advisors | 0.00% | Add +146.1% | 648,115 | $382K |
| State Street Corp. | 0.00% | Add +31.2% | 596,485 | $352K |
| Susquehanna International Group, LLP | 0.00% | Add +165.3% | 582,587 | $344K |
| UBS Group AG | 0.00% | Add +49.6% | 390,008 | $230K |
| Northern Trust Corp. | 0.00% | Add +9.5% | 288,399 | $170K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Add +7.0% | 266,010 | $157K |
| Jane Street Group, LLC | 0.00% | Add +51.5% | 245,998 | $145K |
| Graham Capital Management, L.P. | 0.01% | Add +27.8% | 211,369 | $125K |
| XTX Topco Ltd | 0.00% | Add +581.2% | 169,261 | $100K |
| Charles Schwab Investment Management Inc. | 0.00% | No change | 80,000 | $47K |
| Acadian Asset Management LLC | 0.00% | Reduce -18.4% | 79,414 | $46K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -47.5% | 72,802 | $43K |
| Bank of America Corp. | 0.00% | Reduce -56.4% | 67,654 | $40K |
| Morgan Stanley | 0.00% | Reduce -45.3% | 61,500 | $36K |
| Point72 Asset Management | 0.00% | New | 48,092 | $28K |
| &partners | 0.00% | New | 43,000 | $25K |
| JPMorgan Chase & Co. | 0.00% | Reduce -0.4% | 38,067 | $22K |
| Regions Financial Corp. | 0.00% | No change | 30,000 | $18K |
| LPL Financial LLC | 0.00% | Add +3.2% | 29,469 | $17K |
| R Squared Ltd | 0.01% | New | 28,099 | $17K |
| Two Sigma Securities, LLC | 0.00% | New | 24,508 | $14K |
| Sigma Planning Corp | 0.00% | No change | 24,000 | $14K |
| Two Sigma Investments, LP | 0.00% | New | 23,452 | $14K |
| PFG Investments, LLC | 0.00% | Add +2.4% | 21,750 | $13K |
| LVM Capital Management Ltd. | 0.00% | No change | 21,000 | $12K |
| StoneX Group Inc. | 0.00% | New | 19,871 | $12K |
| Two Sigma Advisers, LP | 0.00% | New | 18,300 | $11K |
| Greenberg Financial Group | 0.00% | — | 18,216 | $11K |
| DNB Asset Management AS | 0.00% | No change | 15,600 | $9K |
| Baader Bank Aktiengesellschaft | 0.00% | New | 21,364 | $8K |
| Raymond James Financial Inc. | 0.00% | Add +4.7% | 11,323 | $7K |
| Bank of New York Mellon Corp | 0.00% | No change | 11,147 | $7K |
| J. L. Bainbridge & Co., Inc. | 0.00% | No change | 11,121 | $7K |
| Focus Financial Network, Inc. | 0.00% | Add +2.0% | 10,350 | $6K |
| Janney Montgomery Scott LLC | 0.00% | No change | 10,000 | $6K |
| Osaic Holdings, Inc. | 0.00% | No change | 8,847 | $5K |
| FMR LLC | 0.00% | No change | 7,365 | $4K |
| Group One Trading LLC | 0.00% | New | 6,662 | $4K |
| NewEdge Advisors, LLC | 0.00% | No change | 5,000 | $3K |
| Rockefeller Capital Management L.P. | 0.00% | No change | 5,000 | $3K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +58.9% | 3,999 | $2K |
| Huntington National Bank | 0.00% | No change | 3,000 | $2K |
| Robinswood Financial LLC | 0.00% | New | 2,557 | $2K |
| Royal Bank of Canada | 0.00% | Add +26.6% | 943 | $1K |
| Harbour Investments, Inc. | 0.00% | Reduce -3.2% | 1,656 | $977 |
| SBI Securities Co., Ltd. | 0.00% | Reduce -0.1% | 1,565 | $923 |
| TD Waterhouse Canada Inc. | 0.00% | No change | 1,555 | $910 |
| BNP Paribas Financial Markets | 0.00% | Add +0.5% | 1,497 | $883 |
| Optiver Holding B.V. | 0.00% | New | 838 | $494 |
| Allworth Financial LP | 0.00% | No change | 702 | $415 |
| Jones Financial Companies LLLP | 0.00% | No change | 700 | $413 |
| Northwestern Mutual Wealth Management Co. | 0.00% | New | 500 | $295 |
| Nisa Investment Advisors, LLC | 0.00% | No change | 350 | $207 |
| Lanark Financial, Inc. | 0.00% | No change | 150 | $88 |
| Wells Fargo & Company | 0.00% | No change | 83 | $49 |
| Clearstead Advisors, LLC | 0.00% | No change | 70 | $42 |
| Arax Advisory Partners | 0.00% | No change | 42 | $25 |
| Hantz Financial Services, Inc. | 0.00% | No change | 82 | $0 |
| Cwm, LLC | 0.00% | Reduce -77.8% | 50 | $0 |
"% of holder's portfolio" is ATOS's weight in each manager's 13F, not the share of Atossa Therapeutics Inc. the manager owns.