RTW INVESTMENTS, LP - 31 Dec 2025 SCHEDULE 13G Report for CASTLE BIOSCIENCES, INC. Common Stock, $0.001 par value (CSTL)

Filing Manager
RTW INVESTMENTS, LP
Reporting Manager
RTW Investments, LP
Security
CASTLE BIOSCIENCES, INC. Common Stock, $0.001 par value
Symbol
CSTL
Shares outstanding
29,378,292 shares
Disclosed Ownership
2,115,237 shares
Ownership
7.2%
Form type
SCHEDULE 13G
Filing time
17 Feb 2026, 08:31:14 UTC
Date of event
31 Dec 2025
SEC
View on sec.gov

Reporting Managers (2)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
RTW Investments, LP 7.2% 2,115,237 0 2,115,237 /s/ Roderick Wong, M.D. Roderick Wong, M.D., Managing Partner
Roderick Wong 7.2% 2,115,237 0 2,115,237 s/ Roderick Wong, M.D. Roderick Wong, M.D.