GT Biopharma(GTBP) - Prospectus

FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GT BIOPHARMA, INC. (Exact Name of Registrant as Specified in Its Charter) (State or Other Jurisdiction of Incorporation or Organization) Delaware 2834 94-1620407 (Primary Standard Industrial Classification Code Number) As filed with the Securities and Exchange Commission on October 24, 2025. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Approximate date of commencement of proposed sale to the pub ...