Climb Bio, Inc. — Director's Dealing 2025

Oct 1, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Climb Bio, Inc. (CLYM)
CIK: 0001768446
Period of Report: 2025-10-01

Reporting Person: ALTSCHULLER Susan (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-10-01	Stock Option (Right to Buy)	$1.97	A	600000	Acquired	2035-09-30	Common Stock (600000)	Direct

Footnotes

F1: This option was granted on October 1, 2025 (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 October 1, 2029, subject to the Reporting Person's continued service.