Quick Takeaways
- Adage Capital Management, L.P. filed SCHEDULE 13D for 89bio, Inc. Common Stock, par value $0.001 per share (ETNB).
- Disclosed ownership: 6.1%.
- Date of event: 26 Sep 2025.
Adage Capital Management, L.P. - 26 Sep 2025 SCHEDULE 13D Report for 89bio, Inc. Common Stock, par value $0.001 per share (ETNB)
- Filing Manager
- Adage Capital Management, L.P.
- Reporting Manager
- Adage Capital Management, L.P.
- Symbol
- ETNB
- Shares outstanding
- 148,410,881 shares
- Disclosed Ownership
- 9,097,587 shares
- Ownership
- 6.1%
- Form type
- SCHEDULE 13D
- Filing time
- 03 Oct 2025, 16:01:19 UTC
- Date of event
- 26 Sep 2025
- Next filing
- 31 Oct 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"Adage Capital Management, L.P. disclosed 6.1% ownership in 89bio, Inc. Common Stock, par value $0.001 per share (ETNB) on 26 Sep 2025."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 03 Oct 2025, 16:01.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (3)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Adage Capital Management, L.P. | 6.1% | 9,097,587 | 0 | 9,097,587 | /s/ Robert Atchinson | By: Adage Capital Partners LLC, its General Partner, By: Robert Atchinson, its Managing Member | 0001535978 |
| Robert Atchinson | 6.1% | 9,097,587 | 0 | 9,097,587 | /s/ Robert Atchinson | Robert Atchinson, Individually | 0001403404 |
| Phillip Gross | 6.1% | 9,097,587 | 0 | 9,097,587 | /s/ Phillip Gross | Phillip Gross, Individually | 0001403413 |