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.
Security
CLIMB BIO, INC. Common Stock, par value $0.0001 per share
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
SEC
View on sec.gov

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