As filed with the Securities and Exchange Commission on April 29, 2024. Registration Statement No. 333-275997 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 1 to Form S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Mustang Bio, Inc. (Exact name of registrant as specified in its charter) (State or Other Jurisdiction of Incorporation or Organization) Delaware 2834 47-3828760 (Primary Standard Industrial Classification Code Number) Identification Number) 377 P ...