X0508 4 2026-02-12 0001768446 Climb Bio, Inc. CLYM 0002027962 Thomas Stephen Basil C/O CLIMB BIO, INC. 20 WILLIAM STREET, SUITE 145 WELLESLEY HILLS MA 02481 true false false false true Common Stock 2026-02-12 4 S false 90000 5.2332 D 214657 D Common Stock 2026-02-13 4 S false 10000 5.8141 D 204657 D These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 14, 2025. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.2212 to $5.2481, inclusive. The reporting person undertakes to provide the staff of the Securities and Exchange Commission, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (3) of this Form 4. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.6200 to $6.1200, inclusive. /s/ Chandra Adams, as Attorney-in-Fact 2026-02-17