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, Q2 2026
Institutional positions in Atossa Therapeutics, Inc. as of Jun 30, 2026. 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
- 31
- −2 vs. Q1 2026
- Shares held
- 1.35M
- +105.3K (+8.5%) vs. Q1 2026
- Total value
- $2.60M
- −$3.92M (−60.2%) vs. Q1 2026
- New holders
- 5
- 9 more added
- Sold out
- 7
- 8 more reduced
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Atossa Therapeutics, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 361,747 | $698.2K | 0.00% | +12,651+3.6% | Added |
| Ameriprise Financial Inc | 258,234 | $498.4K | 0.00% | +3,100+1.2% | Added |
| BlackRock, Inc. | 164,358 | $317.2K | 0.00% | +31,189+23.4% | Added |
| Renaissance Technologies LLC | 132,043 | $254.8K | 0.00% | +23,036+21.1% | Added |
| Geode Capital Management, LLC | 92,382 | $178.3K | 0.00% | −4,679−4.8% | Reduced |
| UBS Group AG | 82,620 | $159.5K | 0.00% | −9,414−10.2% | Reduced |
| Jane Street Group, LLC | 56,602 | $109.2K | 0.00% | +56,602 | New |
| Vanguard Fiduciary Trust Co | 52,583 | $101.5K | 0.00% | +348+0.7% | Added |
| Millennium Management LLC | 46,508 | $89.8K | 0.00% | −20,231−30.3% | Reduced |
| State Street Corp | 39,761 | $76.7K | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 20,249 | $39.1K | 0.00% | +1,025+5.3% | Added |
| Susquehanna International Group, LLP | 15,574 | $30.1K | 0.00% | +15,574 | New |
| Morgan Stanley | 12,345 | $23.8K | 0.00% | −3,857−23.8% | Reduced |
| Vanguard Global Advisers, LLC | 3,089 | $5.96K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 1,994 | $4.00K | 0.00% | +1,350+209.6% | Added |
| Jones Financial Companies LLLP | 2,061 | $3.88K | 0.00% | 00.0% | Unchanged |
| MCF Advisors LLC | 1,066 | $2.06K | 0.00% | +1,066 | New |
| Advisor Group Holdings, Inc. | 587 | $1.13K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 390 | $772 | 0.00% | +7+1.8% | Added |
| Rockefeller Capital Management L.P. | 333 | $643 | 0.00% | −20−5.7% | Reduced |
| Wells Fargo & Company | 228 | $440 | 0.00% | −68−23.0% | Reduced |
| SBI Securities Co., Ltd. | 148 | $286 | 0.00% | +35+31.0% | Added |
| Harbour Investments, Inc. | 110 | $212 | 0.00% | 00.0% | Unchanged |
| TD Waterhouse Canada Inc. | 103 | $210 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 87 | $168 | 0.00% | −11−11.2% | Reduced |
| Group One Trading, L.P. | 54 | $104 | 0.00% | −555−91.1% | Reduced |
| Napier Financial, LLC | 6 | $12 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 6 | $12 | 0.00% | +6 | New |
| Bogart Wealth, LLC | 5 | $10 | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 4 | $8 | 0.00% | 00.0% | Unchanged |
| Bessemer Group Inc | 6 | $0 | 0.00% | +6 | New |
| Tower Research Capital LLC (TRC) | 0 | $0 | 0.00% | −863−100.0% | Sold out |
| GWM Advisors LLC | 0 | $0 | 0.00% | −333−100.0% | Sold out |
| Avion Wealth | 0 | $0 | 0.00% | −318−100.0% | Sold out |
| Robinswood Financial LLC | 0 | $0 | 0.00% | −170−100.0% | Sold out |
| North Star Investment Management Corp. | 0 | $0 | 0.00% | −80−100.0% | Sold out |
| Northwestern Mutual Wealth Management Co | 0 | $0 | 0.00% | −46−100.0% | Sold out |
| Allworth Financial LP | 0 | $0 | 0.00% | −46−100.0% | Sold out |