Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the use of our report dated March 11, 2024, except for the first paragraph in Note 11, as to which the date is February 5, 2025, with respect to the financial statements of Mustang Bio, Inc., included herein, and to the reference to our firm under the heading “Experts” in the prospectus.

/s/ KPMG LLP

Boston, Massachusetts
February 5, 2025

KPMG LLP, a Delaware limited liability partnership and a member firm of
the KPMG global organization of independent member firms affiliated with

KPMG International Limited, a private English company limited by guarantee.