Table of Contents As filed with the Securities and Exchange Commission on February 2, 2024. Registration No. 333-________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Moleculin Biotech, Inc. (Exact Name of Registrant as Specified in Its Charter) (State or Other Jurisdiction of (Primary Standard Industrial (I.R.S. Employer Incorporation or Organization) Classification Code Number) Identification Number) Delaware 2834 ...