Quick Takeaways
- RA CAPITAL MANAGEMENT, L.P. filed SCHEDULE 13D/A for CLIMB BIO, INC. Common Stock, par value $0.0001 per share (CLYM).
- Disclosed ownership: 33%.
- Date of event: 11 Dec 2025.
RA CAPITAL MANAGEMENT, L.P. - 11 Dec 2025 SCHEDULE 13D/A Report for CLIMB BIO, INC. Common Stock, par value $0.0001 per share (CLYM)
- Filing Manager
- RA CAPITAL MANAGEMENT, L.P.
- Reporting Manager
- RA Capital Management, L.P.
- Symbol
- CLYM
- Shares outstanding
- 54,403,891 shares
- Disclosed Ownership
- 17,953,284 shares
- Ownership
- 33%
- Form type
- SCHEDULE 13D/A
- Filing time
- 15 Dec 2025, 19:56:05 UTC
- Date of event
- 11 Dec 2025
- Next filing
- 29 Apr 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"RA CAPITAL MANAGEMENT, L.P. disclosed 33% ownership in CLIMB BIO, INC. Common Stock, par value $0.0001 per share (CLYM) on 11 Dec 2025."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 15 Dec 2025, 19:56.
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 (6)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| RA Capital Management, L.P. | 33% | 17,953,284 | 0 | 17,953,284 | /s/ Peter Kolchinsky | By Peter Kolchinsky, Authorized Signatory | 0001346824 |
| Peter Kolchinsky | 33% | 17,953,284 | 0 | 17,953,284 | /s/ Peter Kolchinsky | Peter Kolchinsky | 0001384859 |
| Rajeev Shah | 33% | 17,953,284 | 0 | 17,953,284 | /s/ Rajeev Shah | Rajeev Shah | 0001619841 |
| RA Capital Healthcare Fund, L.P. | 23% | 12,485,646 | 0 | 12,485,646 | /s/ Peter Kolchinsky | By RA Capital Healthcare Fund GP, LLC, its General Partner, By Peter Kolchinsky, Manager | 0001315082 |
| RA Capital Nexus Fund III, L.P. | 11% | 5,346,247 | 0 | 5,346,247 | /s/ Peter Kolchinsky | By RA Capital Nexus Fund III GP, LLC, its General Partner, By Peter Kolchinsky, Manager | 0001883840 |
| Sera Medicines, LLC | 5.2% | 2,479,872 | 0 | 2,479,872 | /s/ Stephen Thomas | By Stephen Thomas, Chief Executive Officer |