ATOS — ATOSSA THERAPEUTICS INC
As of Q2 2026, 9 SEC-registered investment managers reported holding ATOS (ATOSSA THERAPEUTICS INC) in their latest 13F filings, with a combined reported value of $1.06M across 551.12K shares. That is +3.3% by share count (+17.39K shares) versus the previous quarter, while reported value moved -62.1%. Ownership is concentrated: the five largest holders account for 94.0% of reported value and the top ten for 100.0%.
Compared with the prior quarter, 1 opened new positions, 3 added to existing stakes, 5 trimmed. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
ATOS is classified in the Health Care sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| Vanguard Group history | Q4 2025 | 6.15M | $3.63M | 0.00% | Add |
| Citadel Advisors history | Q4 2025 | 765.72K | $451.77K | 0.00% | Add |
| BlackRock Inc history | Q2 2026 | 164.36K | $317.21K | 0.00% | Add |
| Goldman Sachs Group history | Q2 2025 | 334.95K | $278.01K | 0.00% | Add |
| D. E. Shaw & Co history | Q2 2023 | 216.53K | $272.82K | 0.00% | Reduce |
| Renaissance Technologies history | Q2 2026 | 132.04K | $254.84K | 0.00% | Add |
| Geode Capital Management history | Q2 2026 | 92.38K | $178.34K | 0.00% | Reduce |
| UBS Group AG history | Q2 2026 | 82.62K | $159.46K | 0.00% | Reduce |
| Deutsche Bank AG history | Q1 2022 | 72.42K | $90.00K | 0.00% | Add |
| Millennium Management history | Q2 2026 | 46.51K | $89.76K | 0.00% | Reduce |
| Balyasny Asset Management history | Q1 2024 | 42.98K | $77.37K | 0.00% | New |
| Citigroup Inc history | Q1 2025 | 88.08K | $59.27K | 0.00% | Reduce |
| Franklin Resources history | Q2 2022 | 48.04K | $52.00K | 0.00% | Reduce |
| Charles Schwab Investment Management history | Q4 2025 | 80.00K | $47.20K | 0.00% | Hold |
| AQR Capital Management history | Q2 2025 | 48.33K | $40.11K | 0.00% | Add |
| Bank of America Corp history | Q4 2025 | 67.65K | $39.92K | 0.00% | Reduce |
| Invesco Ltd history | Q1 2025 | 58.67K | $39.48K | 0.00% | Reduce |
| Northern Trust Corp history | Q2 2026 | 20.25K | $39.08K | 0.00% | Add |
| Point72 Asset Management history | Q4 2025 | 48.09K | $28.37K | 0.00% | New |
| Morgan Stanley history | Q2 2026 | 12.35K | $23.82K | 0.00% | Reduce |
New Positions (Q2 2026)
- JPMorgan Chase & Co 390 sh · $772
Fully Exited (vs previous quarter)
No tracked fund fully exited this quarter.
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 9.67M | 9.76M | 9.63M | 2.15M | 2.00M | 2.00M | 133.17K | 164.36K |
| Renaissance Technologies | — | 1.17M | 2.10M | 1.99M | 1.10M | 844.77K | 936.07K | 1.07M | 1.24M | 1.28M | 1.39M | 1.55M | 1.31M | 1.56M | 1.86M | 1.81M | 1.55M | 2.06M | 109.01K | 132.04K |
| Geode Capital Management | 2.11M | 2.00M | 2.05M | 1.22M | 1.22M | 1.22M | 1.21M | 1.11M | 1.10M | 1.11M | 1.21M | 2.77M | 2.81M | 2.81M | 2.85M | 1.30M | 1.36M | 1.37M | 97.06K | 92.38K |
| UBS Group AG | 40.66K | 72.82K | 36.09K | 5.79K | 359 | — | — | — | 33.36K | 30 | 423 | 41.45K | 70.79K | 1.12M | 455.39K | 412.46K | 260.72K | 390.01K | 92.03K | 82.62K |
| Millennium Management | 264.02K | 69.24K | — | 1.53M | 669.76K | 563.57K | 463.93K | 316.40K | 239.70K | 47.27K | 1.01M | 10.66K | — | 29.15K | — | 2.05M | 1.67M | 1.24M | 66.74K | 46.51K |
| Northern Trust Corp | 1.08M | 1.05M | 1.01M | 218.96K | 220.24K | 220.24K | 215.48K | 214.64K | 214.64K | 227.92K | 225.67K | 267.21K | 954.20K | 1.03M | 974.00K | 263.38K | 263.38K | 288.40K | 19.22K | 20.25K |
| Morgan Stanley | 238.13K | 153.96K | 147.59K | 266.39K | 183.81K | 193.69K | 170.75K | 195.89K | 149.76K | 114.81K | 765.41K | 456.15K | 457.52K | 452.20K | 284.19K | 160.91K | 112.35K | 61.50K | 16.20K | 12.35K |
| JPMorgan Chase & Co | 78.07K | 43.28K | 54.96K | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 54.00K | 149.64K | 361.30K | 118.93K | 2.74K | 38.22K | 38.07K | — | 390 |
| Wells Fargo & Co | — | 65.65K | 24.94K | 847 | 790 | 811 | 5.02K | 5.06K | 868 | 910 | 921 | 53.06K | 54.87K | 71.72K | 73.54K | 542 | 83 | 83 | 296 | 228 |
| Citadel Advisors | 1.87M | 2.43M | 1.56M | 465.88K | 237.62K | 257.80K | 88.60K | 84.50K | 102.86K | 70.54K | 219.96K | 260.60K | 238.10K | 466.92K | 47.90K | 127.32K | 322.27K | 765.72K | — | — |
| Point72 Asset Management | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 48.09K | — | — |
| Fidelity Management & Research (FMR) | 18 | — | 1.11K | 4.67K | 800 | 2.79K | 15.60K | 4.68K | 4.18K | 4.16K | 4.16K | 4.11K | 8.73K | 11.29K | 9.29K | 17.04K | 7.37K | 7.37K | — | — |
| Two Sigma Investments | 90.64K | 2.37M | 558.50K | 75.73K | 134.89K | 71.32K | 64.25K | 58.15K | 173.94K | 161.32K | 33.21K | 182.79K | 96.22K | 89.84K | — | — | — | 23.45K | — | — |
| Bank of America Corp | 91.70K | 127.84K | 47.86K | 49 | 1 | 40.05K | 4.33K | 1.80K | 1.95K | 2.12K | 79.93K | 105.67K | 73.67K | 111.47K | 63.97K | 99.60K | 155.17K | 67.65K | — | — |
| BNY Mellon | 477.29K | 519.66K | 510.54K | 152.05K | 152.05K | 151.28K | 151.28K | 112.66K | 110.85K | 52.22K | 12.63K | 411.67K | 303.65K | 289.73K | 289.73K | 11.15K | 11.15K | 11.15K | — | — |
| Marshall Wace | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 13.40K | 85.08K | 28.07K | — | — |
| Charles Schwab Investment Management | 299.43K | 299.43K | 313.91K | 45.96K | 45.96K | 45.96K | 45.96K | 45.96K | 45.96K | 45.96K | 45.96K | 369.99K | 347.61K | 301.65K | 422.58K | 80.00K | 80.00K | 80.00K | — | — |
| Vanguard Group | 7.06M | 6.97M | 6.89M | 6.39M | 5.69M | 5.70M | 5.70M | 5.68M | 5.68M | 5.68M | 5.75M | 6.49M | 6.60M | 6.62M | 6.59M | 5.83M | 6.08M | 6.15M | — | — |
| Goldman Sachs Group | 207.57K | 259.86K | 102.32K | 64.27K | — | — | — | — | — | — | 628.55K | 102.67K | 249.13K | 344.86K | 187.93K | 334.95K | — | — | — | — |
| Deutsche Bank AG | 127.75K | 71.05K | 72.42K | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
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