Atossa Therapeutics, Inc.
ATOS- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001488039
No open-market purchases or sales by Atossa Therapeutics, Inc. insiders were filed in the last 90 days; 31 institutions reported holding it in 13F filings for Q2 2026, worth $2.60M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Atossa Therapeutics, Inc. as of Dec 31, 2025. 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
- 67
- +3 vs. Q3 2025
- Shares held
- 22.0M
- +2.66M (+13.8%) vs. Q3 2025
- Total value
- $13.0M
- −$3.78M (−22.6%) vs. Q3 2025
- New holders
- 14
- 20 more added
- Sold out
- 11
- 10 more reduced
3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ATOS 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 | 31 | $2.60M |
| Q1 2026 | 33 | $6.52M |
| Q4 2025 | 67 | $13.0M |
| Q3 2025 | 67 | $16.9M |
| Q2 2025 | 84 | $17.7M |
| Q1 2025 | 83 | $19.1M |
| Q4 2024 | 86 | $28.3M |
| Q3 2024 | 86 | $41.8M |
| Q2 2024 | 77 | $31.2M |
| Q1 2024 | 67 | $37.4M |
| Q4 2023 | 49 | $14.2M |
| Q3 2023 | 54 | $11.9M |
| Q2 2023 | 52 | $20.2M |
| Q1 2023 | 45 | $11.9M |
| Q4 2022 | 51 | $9.49M |
| Q3 2022 | 59 | $15.8M |
| Q2 2022 | 73 | $25.4M |
| Q1 2022 | 83 | $45.4M |
| Q4 2021 | 92 | $64.2M |
| Q3 2021 | 93 | $102.1M |
| Q2 2021 | 90 | $225.8M |
| Q1 2021 | 54 | $22.8M |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Atossa Therapeutics, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 6,147,838 | $3.63M | 0.00% | +68,994+1.1% | Added |
| Ameriprise Financial Inc | 3,791,061 | $2.24M | 0.00% | +839,556+28.4% | Added |
| Renaissance Technologies LLC | 2,062,838 | $1.22M | 0.00% | +514,175+33.2% | Added |
| BlackRock, Inc. | 1,997,627 | $1.18M | 0.00% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 1,371,909 | $809.6K | 0.00% | +9,627+0.7% | Added |
| Millennium Management LLC | 1,242,868 | $733.3K | 0.00% | −425,780−25.5% | Reduced |
| Jacobs Levy Equity Management, Inc | 1,048,289 | $618.5K | 0.00% | +1,048,289 | New |
| Citadel Advisors LLC | 648,115 | $382.4K | 0.00% | +384,746+146.1% | Added |
| State Street Corp | 596,485 | $351.9K | 0.00% | +141,990+31.2% | Added |
| Susquehanna International Group, LLP | 582,587 | $343.7K | 0.00% | +362,985+165.3% | Added |
| UBS Group AG | 390,008 | $230.1K | 0.00% | +129,286+49.6% | Added |
| Northern Trust Corp | 288,399 | $170.2K | 0.00% | +25,022+9.5% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 266,010 | $156.9K | 0.00% | +17,396+7.0% | Added |
| Jane Street Group, LLC | 245,998 | $145.1K | 0.00% | +83,570+51.5% | Added |
| Graham Capital Management, L.P. | 211,369 | $124.7K | 0.00% | +45,923+27.8% | Added |
| XTX Topco Ltd | 169,261 | $99.9K | 0.00% | +144,412+581.2% | Added |
| Charles Schwab Investment Management Inc | 80,000 | $47.2K | 0.00% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 79,414 | $46.0K | 0.00% | −17,873−18.4% | Reduced |
| Qube Research & Technologies Ltd | 72,802 | $43.0K | 0.00% | −65,841−47.5% | Reduced |
| Bank of America Corp | 67,654 | $39.9K | 0.00% | −87,515−56.4% | Reduced |
| Morgan Stanley | 61,500 | $36.3K | 0.00% | −50,848−45.3% | Reduced |
| Point72 Asset Management, L.P. | 48,092 | $28.4K | 0.00% | +48,092 | New |
| Wiley Bros.-Aintree Capital, LLC | 43,000 | $25.4K | 0.00% | +43,000 | New |
| JPMorgan Chase & Co | 38,067 | $22.5K | 0.00% | −148−0.4% | Reduced |
| Regions Financial Corp | 30,000 | $17.7K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 29,469 | $17.4K | 0.00% | +913+3.2% | Added |
| R Squared Ltd | 28,099 | $16.6K | 0.01% | +28,099 | New |
| Marshall Wace, LLP | 28,072 | $16.6K | 0.00% | −57,004−67.0% | Reduced |
| Two Sigma Securities, LLC | 24,508 | $14.5K | 0.00% | +24,508 | New |
| Sigma Planning Corp | 24,000 | $14.2K | 0.00% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 23,452 | $13.8K | 0.00% | +23,452 | New |
| PFG Investments, LLC | 21,750 | $12.8K | 0.00% | +500+2.4% | Added |
| LVM Capital Management Ltd | 21,000 | $12.0K | 0.00% | 00.0% | Unchanged |
| StoneX Group Inc. | 19,871 | $11.7K | 0.00% | +19,871 | New |
| Two Sigma Advisers, LP | 18,300 | $10.8K | 0.00% | +18,300 | New |
| Greenberg Financial Group | 18,216 | $10.7K | 0.00% | +18,216 | New |
| DnB Asset Management AS | 15,600 | $9.20K | 0.00% | 00.0% | Unchanged |
| Baader Bank INC | 21,364 | $7.77K | 0.00% | +21,364 | New |
| Raymond James Financial Inc | 11,323 | $6.68K | 0.00% | +508+4.7% | Added |
| Bank of New York Mellon Corp | 11,147 | $6.58K | 0.00% | 00.0% | Unchanged |
| J. L. Bainbridge & Co., Inc. | 11,121 | $6.56K | 0.00% | 00.0% | Unchanged |
| Focus Financial Network, Inc. | 10,350 | $6.11K | 0.00% | +200+2.0% | Added |
| Janney Montgomery Scott LLC | 10,000 | $6.00K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 8,847 | $5.22K | 0.00% | 00.0% | Unchanged |
| FMR LLC | 7,365 | $4.34K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 6,662 | $3.93K | 0.00% | +6,662 | New |
| GWM Advisors LLC | 5,000 | $2.95K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 5,000 | $2.95K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 3,999 | $2.36K | 0.00% | +1,483+58.9% | Added |
| Huntington National Bank | 3,000 | $1.77K | 0.00% | 00.0% | Unchanged |
| Robinswood Financial LLC | 2,557 | $1.51K | 0.00% | +2,557 | New |
| Royal Bank of Canada | 943 | $1.00K | 0.00% | +198+26.6% | Added |
| Harbour Investments, Inc. | 1,656 | $977 | 0.00% | −55−3.2% | Reduced |
| SBI Securities Co., Ltd. | 1,565 | $923 | 0.00% | −1−0.1% | Reduced |
| TD Waterhouse Canada Inc. | 1,555 | $910 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 1,497 | $883 | 0.00% | +7+0.5% | Added |
| Optiver Holding B.V. | 838 | $494 | 0.00% | +838 | New |
| Allworth Financial LP | 702 | $415 | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 700 | $413 | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 500 | $295 | 0.00% | +500 | New |
| Nisa Investment Advisors, LLC | 350 | $207 | 0.00% | 00.0% | Unchanged |
| NBC Securities, Inc. | 150 | $88 | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 83 | $49 | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 70 | $42 | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 42 | $25 | 0.00% | 00.0% | Unchanged |
| Hantz Financial Services, Inc. | 82 | $0 | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 50 | $0 | 0.00% | −175−77.8% | Reduced |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −310,754−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −253,343−100.0% | Sold out |
| Commonwealth Equity Services, LLC | 0 | $0 | 0.00% | −46,001−100.0% | Sold out |
| Gallagher Capital Advisors, LLC | 0 | $0 | 0.00% | −31,575−100.0% | Sold out |
| NorthRock Partners, LLC | 0 | $0 | 0.00% | −16,750−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −16,707−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −16,932−100.0% | Sold out |
| Victory Capital Management Inc | 0 | $0 | 0.00% | −14,864−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −29−100.0% | Sold out |
| EverSource Wealth Advisors, LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −322−100.0% | Sold out |
| Point72 Asia (Singapore) Pte. Ltd. | – | – | – | – | Not filed |
| Wolverine Trading, LLC | – | – | – | – | Not filed |
| Point72 (DIFC) Ltd | – | – | – | – | Not filed |