Quick Takeaways
- Adage Capital Management, L.P. filed SCHEDULE 13G/A for Seadrill Ltd Common Shares, par value $0.01 per share (SDRL).
- Disclosed ownership: 3.9%.
- Date of event: 31 Mar 2026.
Adage Capital Management, L.P. - 31 Mar 2026 SCHEDULE 13G/A Report for Seadrill Ltd Common Shares, par value $0.01 per share (SDRL)
- Filing Manager
- Adage Capital Management, L.P.
- Reporting Manager
- Adage Capital Management, L.P.
- Symbol
- SDRL
- Shares outstanding
- 62,523,756 shares
- Disclosed Ownership
- 2,463,436 shares
- Ownership
- 3.9%
- Form type
- SCHEDULE 13G/A
- Filing time
- 13 May 2026, 09:16:04 UTC
- Date of event
- 31 Mar 2026
- Previous filing
- 12 Aug 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"Adage Capital Management, L.P. disclosed 3.9% ownership in Seadrill Ltd Common Shares, par value $0.01 per share (SDRL) on 31 Mar 2026."
What Changed
- Previous schedule filing date: 12 Aug 2025.
- Current filing was accepted on 13 May 2026, 09:16.
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. | 3.9% | 2,463,436 | 0 | 2,463,436 | /s/ Robert Atchinson | By: Adage Capital Partners LLC, its General Partner, By: Robert Atchinson, its Managing Member | |
| Robert Atchinson | 3.9% | 2,463,436 | 0 | 2,463,436 | /s/ Robert Atchinson | Robert Atchinson, individually | |
| Phillip Gross | 3.9% | 2,463,436 | 0 | 2,463,436 | /s/ Phillip Gross | Phillip Gross, individually |