ATOSSA THERAPEUTICS INC (ATOS)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
Institutions report 1,345,283 shares against 9,979,298 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | $698.2K | 361,747 | 0.00% | 2q | +3.6%+$24.4K |
| AMERIPRISE FINANCIAL INC | $498.4K | 258,234 | 0.00% | 2q | +1.2%+$6.0K |
| BlackRock, Inc. | $317.2K | 164,358 | 0.00% | 2q | +23.4%+$60.2K |
| RENAISSANCE TECHNOLOGIES LLC | $254.8K | 132,043 | 0.00% | 2q | +21.1%+$44.5K |
| GEODE CAPITAL MANAGEMENT, LLC | $178.3K | 92,382 | 0.00% | 2q | -4.8%-$9.0K |
| UBS Group AG | $159.5K | 82,620 | 0.00% | 2q | -10.2%-$18.2K |
| JANE STREET GROUP, LLC | $109.2K | 56,602 | 0.00% | new | NEW |
| VANGUARD FIDUCIARY TRUST CO | $101.5K | 52,583 | 0.00% | 2q | +0.7% |
| MILLENNIUM MANAGEMENT LLC | $89.8K | 46,508 | 0.00% | 2q | -30.3%-$39.0K |
| SIMPLEX TRADING, LLC | $89.0K CALL | options only | 0.00% | 2q | OPTIONS |
| STATE STREET CORP | $76.7K | 39,761 | 0.00% | 2q | HELD |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $51.9K incl. $21.8K options CALL | 15,574 | 0.00% | 2q | HELD |
| NORTHERN TRUST CORP | $39.1K | 20,249 | 0.00% | 2q | +5.3%+$2.0K |
| MORGAN STANLEY | $23.8K | 12,345 | 0.00% | 2q | -23.8%-$7.4K |
| GROUP ONE TRADING LLC | $8.0K incl. $7.9K options CALL+PUT | 54 | 0.00% | 2q | -91.1%-$82.4K |
| Vanguard Global Advisers, LLC | $6.0K | 3,089 | 0.00% | 2q | HELD |
| ROYAL BANK OF CANADA | $4.0K | 1,994 | 0.00% | 2q | +209.6%+$2.7K |
| JONES FINANCIAL COMPANIES LLLP | $3.9K | 2,061 | 0.00% | 2q | HELD |
| MCF Advisors LLC | $2.1K | 1,066 | 0.00% | new | NEW |
| OSAIC HOLDINGS, INC. | $1.1K | 587 | 0.00% | 2q | HELD |
| JPMORGAN CHASE & CO | $772 | 390 | 0.00% | 2q | +1.8% |
| Rockefeller Capital Management L.P. | $643 | 333 | 0.00% | 2q | -5.7% |
| WELLS FARGO & COMPANY/MN | $440 | 228 | 0.00% | 2q | -23.0% |
| SBI Securities Co., Ltd. | $286 | 148 | 0.00% | 2q | +31.0% |
| HARBOUR INVESTMENTS, INC. | $212 | 110 | 0.00% | 2q | HELD |
| TD Waterhouse Canada Inc. | $210 | 103 | 0.00% | 2q | HELD |
| BNP PARIBAS FINANCIAL MARKETS | $168 | 87 | 0.00% | 2q | -11.2% |
| Caitong International Asset Management Co., Ltd | $12 | 6 | 0.00% | new | NEW |
| Napier Financial, LLC | $12 | 6 | 0.00% | 2q | HELD |
| Bogart Wealth, LLC | $10 | 5 | 0.00% | 2q | HELD |
| Clearstead Advisors, LLC | $8 | 4 | 0.00% | 2q | HELD |
| FMR LLC | $0 | none filed | 0.00% | new | NEW |
| BESSEMER GROUP INC | $0 | 6 | 0.00% | new | NEW |
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-10-09 | 2026-10-08 | Material agreement entered | filing |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 5 | $1.4K | 621 | 2 | 1 | 0 | 0.0% |
| Q2 2026 | 33 | $2.7M | 1,345,283 | 5 | 9 | 8 | 4.4% |
| Q1 2026 | 35 | $7.6M | 1,239,979 | 35 | 0 | 0 | 13.7% |
| Q4 2025 | 66 | $13.2M | 21,981,914 | 15 | 19 | 8 | 1.7% |
| Q3 2025 | 66 | $17.2M | 19,449,442 | 8 | 12 | 25 | 2.0% |
| Q2 2025 | 84 | $18.0M | 21,356,804 | 27 | 14 | 23 | 1.5% |
| Q1 2025 | 83 | $19.3M | 28,400,957 | 11 | 17 | 28 | 0.9% |
| Q4 2024 | 85 | $28.5M | 29,931,066 | 5 | 28 | 22 | 0.9% |
| Q3 2024 | 88 | $43.0M | 27,493,393 | 18 | 19 | 23 | 2.7% |
| Q2 2024 | 77 | $32.1M | 26,240,134 | 26 | 20 | 15 | 2.7% |
| Q1 2024 | 65 | $38.1M | 20,818,030 | 22 | 14 | 9 | 1.8% |
| Q4 2023 | 49 | $15.3M | 16,092,239 | 3 | 9 | 17 | 7.4% |
| Q3 2023 | 53 | $12.8M | 16,179,209 | 6 | 11 | 14 | 6.7% |
| Q2 2023 | 52 | $21.6M | 16,012,627 | 11 | 8 | 12 | 6.8% |
| Q1 2023 | 45 | $12.7M | 16,397,402 | 2 | 6 | 17 | 6.6% |
| Q4 2022 | 50 | $10.6M | 17,947,376 | 10 | 10 | 12 | 10.0% |
| Q3 2022 | 50 | $18.1M | 19,004,578 | 4 | 5 | 23 | 12.3% |
| Q2 2022 | 66 | $29.3M | 23,246,020 | 16 | 8 | 27 | 13.5% |
| Q1 2022 | 77 | $50.7M | 35,804,706 | 8 | 14 | 34 | 10.7% |
| Q4 2021 | 92 | $79.2M | 39,493,665 | 15 | 22 | 26 | 19.7% |
| Q3 2021 | 95 | $203.9M | 46,798,640 | 17 | 27 | 26 | 24.8% |
| Q2 2021 | 93 | $596.2M | 69,645,161 | 57 | 20 | 8 | 26.2% |
| Q1 2021 | 57 | $37.6M | 10,811,739 | 44 | 8 | 3 | 39.3% |
| Q4 2020 | 13 | $1.8M | 1,672,721 | 3 | 4 | 1 | 11.2% |
| Q3 2020 | 22 | $44.4M | 18,320,686 | 11 | 3 | 3 | 0.2% |
| Q2 2020 | 12 | $52.9M | 13,897,746 | 7 | 1 | 2 | 0.2% |
| Q1 2020 | 7 | $18.9M | 14,227,336 | 1 | 1 | 1 | 0.0% |
| Q4 2019 | 12 | $21.0M | 13,377,435 | 3 | 2 | 0 | 0.1% |
| Q3 2019 | 11 | $26.0M | 13,248,639 | 5 | 0 | 1 | 0.1% |
| Q2 2019 | 9 | $33.8M | 13,241,215 | 2 | 2 | 4 | 0.1% |
| Q1 2019 | 9 | $64.0M | 18,189,764 | 3 | 3 | 2 | 0.0% |
| Q4 2018 | 13 | $814.0K | 797,664 | 3 | 0 | 0 | 0.0% |