🕵️ 89BIO, Inc. ($ETNB)
SEC insider & ownership activity, last 12 months · CIK 1785173 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. One red-flag 8-K in the window: Delisting notice (3.01), Oct 30, 2025.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Aaron Cowen | 8.5% | 13G | Feb 13, 2025 | filing ↗ | |
| Averill Master Fund, Ltd. | 7.7% | 13G | Feb 13, 2025 | filing ↗ | |
| The Vanguard Group | 5.6% | 13G | Jul 29, 2025 | filing ↗ | |
| Suvretta Capital Management, LLC | 5.6% | 13G | Nov 13, 2025 | filing ↗ | |
| Aaron Cowen | 5.6% | 13G | Nov 13, 2025 | filing ↗ | |
| DEEP Track Capital, LP | 5.4% | 13G | Dec 23, 2024 | filing ↗ | |
| DEEP Track Biotechnology Master Fund, Ltd. | 5.4% | 13G | Dec 23, 2024 | filing ↗ | |
| David Kroin | 5.4% | 13G | Dec 23, 2024 | filing ↗ | |
| Janus Henderson Biotech Innovation Master Fund Ltd | 5.1% | 13G | Aug 14, 2025 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Agreement terminated (1.02) | Oct 30, 2025 | filing ↗ |
| Acquisition or disposition (2.01) | Oct 30, 2025 | filing ↗ |
| Delisting notice (3.01) | Oct 30, 2025 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Oct 30, 2025 | filing ↗ |
| Change of control (5.01) | Oct 30, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 30, 2025 | filing ↗ |
| Charter/bylaw changes (5.03) | Oct 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 30, 2025 | filing ↗ |
| Material agreement (1.01) | Sep 17, 2025 | filing ↗ |
| Other events (8.01) | Sep 17, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 17, 2025 | filing ↗ |
| Earnings (2.02) | Aug 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 7, 2025 | filing ↗ |