EXHIBIT 99.1

JOINT FILING AGREEMENT

The undersigned hereby agree that a single Schedule 13D (or any amendment thereto) relating to the Common Stock of CAMP4 Therapeutics Corporation shall be filed on behalf of each of the undersigned and that this Joint Filing Agreement shall be filed as an exhibit to such Schedule 13D.

Dated: September 11, 2025

5AM Ventures VI, L.P.

By:

5AM Partners VI, LLC

its

General Partner

By:

/s/ Andrew J. Schwab

Name: Andrew J. Schwab

Title: Managing Member

5AM Partners VI, LLC

By:

/s/ Andrew J. Schwab

Name: Andrew J. Schwab

Title: Managing Member

5AM Ventures VII, L.P.

By:

5AM Partners VII, LLC

its

General Partner

By:

/s/ Andrew J. Schwab

Name: Andrew J. Schwab

Title: Managing Member

5AM Partners VII, LLC

By:

/s/ Andrew J. Schwab

Name: Andrew J. Schwab

Title: Managing Member

5AM Opportunities II, L.P.

By:

5AM Opportunities II (GP), LLC

its

General Partner

By:

/s/ Andrew J. Schwab

Name: Andrew J. Schwab

Title: Managing Member

5AM Opportunities II (GP), LLC

By:

/s/ Andrew J. Schwab

Name: Andrew J. Schwab

Title: Managing Member

/s/ Andrew J. Schwab

Andrew J. Schwab

/s/ Dr. Kush Parmar

Dr. Kush Parmar

Camp4 Therapeutics Corp SCHEDULE 13D/A