Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Checkbox not checked   Rule 13d-1(b)
Checkbox checked   Rule 13d-1(c)
Checkbox not checked   Rule 13d-1(d)






SCHEDULE 13G




Comment for Type of Reporting Person:  Consists of (i) 3,312,625 shares of common stock issued to Pontifax (Israel) VI L.P. and (ii) 1,893,755 shares of common stock issued to Pontifax (Cayman) VI L.P. The General Partner of Pontifax (Israel) VI L.P. and Pontifax (Cayman) VI L.P. is Pontifax VI G.P. L.P. The General Partner of Pontifax VI G.P. L.P. is Pontifax Management 4 G.P. (2015) Ltd. Mr. Tomer Kariv and Mr. Ran Nussbaum are the managing members of the partnerships mentioned above. Each of Mr. Kariv and Mr. Nussbaum disclaim beneficial ownership of the shares held by the Pontifax entities listed above, and the inclusion of such shares in this Schedule 13G shall not be deemed to be an admission of beneficial ownership of the reported shares.


SCHEDULE 13G




Comment for Type of Reporting Person:  Consists of (i) 3,312,625 shares of common stock issued to Pontifax (Israel) VI L.P. and (ii) 1,893,755 shares of common stock issued to Pontifax (Cayman) VI L.P. The General Partner of Pontifax (Israel) VI L.P. and Pontifax (Cayman) VI L.P. is Pontifax VI G.P. L.P. The General Partner of Pontifax VI G.P. L.P. is Pontifax Management 4 G.P. (2015) Ltd. Mr. Tomer Kariv and Mr. Ran Nussbaum are the managing members of the partnerships mentioned above. Each of Mr. Kariv and Mr. Nussbaum disclaim beneficial ownership of the shares held by the Pontifax entities listed above, and the inclusion of such shares in this Schedule 13G shall not be deemed to be an admission of beneficial ownership of the reported shares.


SCHEDULE 13G




Comment for Type of Reporting Person:  Consists of (i) 3,312,625 shares of common stock issued to Pontifax (Israel) VI L.P. and (ii) 1,893,755 shares of common stock issued to Pontifax (Cayman) VI L.P. The General Partner of Pontifax (Israel) VI L.P. and Pontifax (Cayman) VI L.P. is Pontifax VI G.P. L.P. The General Partner of Pontifax VI G.P. L.P. is Pontifax Management 4 G.P. (2015) Ltd. Mr. Tomer Kariv and Mr. Ran Nussbaum are the managing members of the partnerships mentioned above. Each of Mr. Kariv and Mr. Nussbaum disclaim beneficial ownership of the shares held by the Pontifax entities listed above, and the inclusion of such shares in this Schedule 13G shall not be deemed to be an admission of beneficial ownership of the reported shares.


SCHEDULE 13G




Comment for Type of Reporting Person:  Consists of (i) 3,312,625 shares of common stock issued to Pontifax (Israel) VI L.P. and (ii) 1,893,755 shares of common stock issued to Pontifax (Cayman) VI L.P. The General Partner of Pontifax (Israel) VI L.P. and Pontifax (Cayman) VI L.P. is Pontifax VI G.P. L.P. The General Partner of Pontifax VI G.P. L.P. is Pontifax Management 4 G.P. (2015) Ltd. Mr. Tomer Kariv and Mr. Ran Nussbaum are the managing members of the partnerships mentioned above. Each of Mr. Kariv and Mr. Nussbaum disclaim beneficial ownership of the shares held by the Pontifax entities listed above, and the inclusion of such shares in this Schedule 13G shall not be deemed to be an admission of beneficial ownership of the reported shares.


SCHEDULE 13G



 
Pontifax VI G.P. L.P.
 
Signature:/s/ Pontifax Management 4 G.P. (2015) Ltd.
Name/Title:Pontifax Management 4 G.P. (2015) Ltd./General Partner
Date:09/18/2025
 
Pontifax Management 4 G.P. (2015) Ltd.
 
Signature:/s/ Ran Nussbaum
Name/Title:Ran Nussbaum/Director
Date:09/18/2025
 
Ran Nussbaum
 
Signature:/s/ Ran Nussbaum
Name/Title:Ran Nussbaum/Director
Date:09/18/2025
 
Tomer Kariv
 
Signature:/s/ Tomer Kariv
Name/Title:TOMER KARIV
Date:09/18/2025
Exhibit Information

A. Joint Filing Agreement, dated as of September 18, 2025, by and among Pontifax VI G.P. L.P., Pontifax Management 4 G.P. (2015) Ltd., Ran Nussbaum and Tomer Kariv.

Exhibit A

 

JOINT FILING AGREEMENT

 

The undersigned hereby agree that the Schedule 13G with respect to the shares of Climb Bio, Inc. dated as of September 18, 2025 is, and any amendments thereto (including amendments on Schedule 13D) signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

 

Date: September 18, 2025

 

PONTIFAX VI G.P. L.P.  
     
By: /s/ Pontifax Management 4 G.P. (2015) Ltd.  
Name:  Pontifax Management 4 G.P. (2015) Ltd.  
Title: General Partner  
     
By: /s/ Ran Nussbaum  
Name:  Ran Nussbaum  
Title: Director  
     
PONTIFAX MANAGEMENT 4 G.P. (2015) LTD.  
     
By: /s/ Ran Nussbaum  
Name: Ran Nussbaum  
Title: Director  

 

/s/ Ran Nussbaum  
RAN NUSSBAUM
   
/s/ Tomer Kariv  
TOMER KARIV