Schedule 13G Filing by Pontifax Entities for Climb Bio, Inc.

Pontifax VI G.P. L.P., Pontifax Management 4 G.P. (2015) Ltd., Ran Nussbaum, and Tomer Kariv have filed a Schedule 13G with the SEC, reporting beneficial ownership of 5,206,380 shares of common stock in Climb Bio, Inc., representing 7.7% of the total shares outstanding. The filing indicates that the shares are held by Pontifax (Israel) VI L.P. and Pontifax (Cayman) VI L.P., with Pontifax VI G.P. L.P. as the general partner and Pontifax Management 4 G.P. (2015) Ltd. as the general partner of Pontifax VI G.P. L.P. Ran Nussbaum and Tomer Kariv are the managing members of these partnerships. The filing includes a joint filing agreement dated September 18, 2025, and certifies that the shares were not acquired for the purpose of influencing the control of the issuer.