Atossa TherapeuticsATOS
13F holders, Q2 2026 (June 30)At the end of Q2 2026, 31 institutions reported holding Atossa Therapeutics Inc. (ATOS) in their 13F filings, down 2 from Q1 2026. 6 opened new positions and 7 sold out. The largest holders were Vanguard Capital Management LLC ($698K), Ameriprise Financial Inc. ($498K) and BlackRock, Inc. ($317K). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Atossa Therapeutics Inc.
- CUSIP
- 04962H704
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 6 | $141K |
| Exits | 7 | $9K |
All 13F filers, Q1 2026 → Q2 2026: 145,995 shares bought and 40,691 shares sold, net +105,304 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 31 holders
| Vanguard Capital Management LLC | 0.00% | Add +3.6% | 361,747 | $698K |
| Ameriprise Financial Inc. | 0.00% | Add +1.2% | 258,234 | $498K |
| BlackRock, Inc. | 0.00% | Add +23.4% | 164,358 | $317K |
| Renaissance Technologies | 0.00% | Add +21.1% | 132,043 | $255K |
| Geode Capital Management, LLC | 0.00% | Reduce -4.8% | 92,382 | $178K |
| UBS Group AG | 0.00% | Reduce -10.2% | 82,620 | $159K |
| Jane Street Group, LLC | 0.00% | New | 56,602 | $109K |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +0.7% | 52,583 | $101K |
| Millennium Management | 0.00% | Reduce -30.3% | 46,508 | $90K |
| State Street Corp. | 0.00% | No change | 39,761 | $77K |
| Northern Trust Corp. | 0.00% | Add +5.3% | 20,249 | $39K |
| Susquehanna International Group, LLP | 0.00% | New | 15,574 | $30K |
| Morgan Stanley | 0.00% | Reduce -23.8% | 12,345 | $24K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 3,089 | $6K |
| Royal Bank of Canada | 0.00% | Add +209.6% | 1,994 | $4K |
| Jones Financial Companies LLLP | 0.00% | No change | 2,061 | $4K |
| MCF Advisors LLC | 0.00% | New | 1,066 | $2K |
| Osaic Holdings, Inc. | 0.00% | No change | 587 | $1K |
| JPMorgan Chase & Co. | 0.00% | Add +1.8% | 390 | $772 |
| Rockefeller Capital Management L.P. | 0.00% | Reduce -5.7% | 333 | $643 |
| Wells Fargo & Company | 0.00% | Reduce -23.0% | 228 | $440 |
| SBI Securities Co., Ltd. | 0.00% | Add +31.0% | 148 | $286 |
| Harbour Investments, Inc. | 0.00% | No change | 110 | $212 |
| TD Waterhouse Canada Inc. | 0.00% | No change | 103 | $210 |
| BNP Paribas Financial Markets | 0.00% | Reduce -11.2% | 87 | $168 |
| Group One Trading LLC | 0.00% | Reduce -91.1% | 54 | $104 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 6 | $12 |
| Napier Financial, LLC | 0.00% | No change | 6 | $12 |
| Bogart Wealth, LLC | 0.00% | No change | 5 | $10 |
| Clearstead Advisors, LLC | 0.00% | No change | 4 | $8 |
| Bessemer Group Inc. | 0.00% | New | 6 | $0 |
"% of holder's portfolio" is ATOS's weight in each manager's 13F, not the share of Atossa Therapeutics Inc. the manager owns.