<SEC-DOCUMENT>0001654954-20-009309-index.html : 20200818 <SEC-HEADER>0001654954-20-009309.hdr.sgml : 20200818 <ACCEPTANCE-DATETIME>20200818170103 ACCESSION NUMBER: 0001654954-20-009309 CONFORMED SUBMISSION TYPE: 424B3 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20200818 DATE AS OF CHANGE: 20200818 FILER: COMPANY DATA: COMPANY CONFORMED NAME: GT Biopharma, Inc. CENTRAL INDEX KEY: 0000109657 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 941620407 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 424B3 SEC ACT: 1933 Act SEC FILE NUMBER: 333-239858 FILM NUMBER: 201114440 BUSINESS ADDRESS: STREET 1: 310 N. WESTLAKE BLVD. STREET 2: SUITE 206 CITY: WESTLAKE VILLAGE STATE: CA ZIP: 91362 BUSINESS PHONE: (800) 304-9888 MAIL ADDRESS: STREET 1: 310 N. WESTLAKE BLVD. STREET 2: SUITE 206 CITY: WESTLAKE VILLAGE STATE: CA ZIP: 91362 FORMER COMPANY: FORMER CONFORMED NAME: OXIS INTERNATIONAL INC DATE OF NAME CHANGE: 19940916 FORMER COMPANY: FORMER CONFORMED NAME: DDI PHARMACEUTICALS INC DATE OF NAME CHANGE: 19920703 FORMER COMPANY: FORMER CONFORMED NAME: DIAGNOSTIC DATA INC /DE/ DATE OF NAME CHANGE: 19850312 </SEC-HEADER> <DOCUMENT> <TYPE>424B3 <SEQUENCE>1 <FILENAME>gtbpb_424b3.htm <DESCRIPTION>PROSPECTUS SUPPLEMENT <TEXT> Document 1 - file: gtbpb_424b3.htm
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