<SEC-DOCUMENT>0001654954-18-010920-index.html : 20181009 <SEC-HEADER>0001654954-18-010920.hdr.sgml : 20181009 <ACCEPTANCE-DATETIME>20181009161640 ACCESSION NUMBER: 0001654954-18-010920 CONFORMED SUBMISSION TYPE: 424B3 PUBLIC DOCUMENT COUNT: 3 FILED AS OF DATE: 20181009 DATE AS OF CHANGE: 20181009 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: FL FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 424B3 SEC ACT: 1933 Act SEC FILE NUMBER: 333-223349 FILM NUMBER: 181113840 BUSINESS ADDRESS: STREET 1: 1825 K STREET STREET 2: SUITE 510 CITY: WASHINGTON, D.C. STATE: DC ZIP: 33602 BUSINESS PHONE: (800) 304-9888 MAIL ADDRESS: STREET 1: 1825 K STREET STREET 2: SUITE 510 CITY: WASHINGTON, D.C. STATE: DC ZIP: 33602 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>gtbp_424b3.htm <DESCRIPTION>PROSPECTUS SUPPLEMENT <TEXT> Document 1 - file: gtbp_424b3.htm
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