Atossa Therapeutics, Inc. (ATOS) ownership: Top institutional holder: VANGUARD GROUP INC ($3.63M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 6147838.00 | $3.63M | 2025-12-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 349096.00 | $1.84M | 2026-03-31 |
| AMERIPRISE FINANCIAL INC | 255134.00 | $1.34M | 2026-03-31 |
| BlackRock, Inc. | 133169.00 | $700469.00 | 2026-03-31 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 1048289.00 | $618491.00 | 2025-12-31 |
| RENAISSANCE TECHNOLOGIES LLC | 109007.00 | $573377.00 | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 97061.00 | $510657.00 | 2026-03-31 |
| UBS Group AG | 92034.00 | $484099.00 | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.