Quick Takeaways
- BlackRock, Inc. filed SCHEDULE 13G/A for SELLAS LIFE SCIENCES GROUP INC Common Stock (SLS).
- Disclosed ownership: 6.8%.
- Date of event: 31 Mar 2026.
BlackRock, Inc. - 31 Mar 2026 SCHEDULE 13G/A Report for SELLAS LIFE SCIENCES GROUP INC Common Stock (SLS)
- Filing Manager
- BlackRock, Inc.
- Reporting Manager
- BlackRock, Inc.
- Symbol
- SLS
- Shares outstanding
- 178,475,456 shares
- Disclosed Ownership
- 12,136,331 shares
- Ownership
- 6.8%
- Form type
- SCHEDULE 13G/A
- Filing time
- 24 Apr 2026, 16:11:56 UTC
- Date of event
- 31 Mar 2026
- Previous filing
- 17 Oct 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"BlackRock, Inc. disclosed 6.8% ownership in SELLAS LIFE SCIENCES GROUP INC Common Stock (SLS) on 31 Mar 2026."
What Changed
- Previous schedule filing date: 17 Oct 2025.
- Current filing was accepted on 24 Apr 2026, 16:11.
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 (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 6.8% | 12,136,331 | 11,966,938 | 0 | Spencer Fleming | Managing Director |