X0508 4 2026-01-06 0001768446 Climb Bio, Inc. CLYM 0001817988 ALTSCHULLER Susan C/O CLIMB BIO, INC. 20 WILLIAM STREET, SUITE 145 WELLESLEY HILLS MA 02481 false true false false Chief Financial Officer false Stock Option (Right to Buy) 3.81 2026-01-06 4 A false 142500 0.00 A 2036-01-05 Common Stock 142500 142500 D This option was granted on January 6, 2026 (the "Grant Date"). The shares underlying the option are scheduled to vest with respect to 25% of the shares on the first anniversary of the Grant Date and the remainder are scheduled to vest in 36 equal monthly installments through January 6, 2030, subject to the Reporting Person's continued service. /s/ Chandra Adams, as Attorney-in-Fact 2026-01-08