<SEC-DOCUMENT>0001654954-21-001459-index.html : 20210210 <SEC-HEADER>0001654954-21-001459.hdr.sgml : 20210210 <ACCEPTANCE-DATETIME>20210210211128 ACCESSION NUMBER: 0001654954-21-001459 CONFORMED SUBMISSION TYPE: S-1MEF PUBLIC DOCUMENT COUNT: 5 <REFERENCE-462B>333-251311 FILED AS OF DATE: 20210210 DATE AS OF CHANGE: 20210210 EFFECTIVENESS DATE: 20210210 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: S-1MEF SEC ACT: 1933 Act SEC FILE NUMBER: 333-252973 FILM NUMBER: 21616292 BUSINESS ADDRESS: STREET 1: 9350 WILSHIRE BLVD. STREET 2: SUITE 203 CITY: BEVERLY HILLS STATE: CA ZIP: 90212 BUSINESS PHONE: (800) 304-9888 MAIL ADDRESS: STREET 1: 9350 WILSHIRE BLVD. STREET 2: SUITE 203 CITY: BEVERLY HILLS STATE: CA ZIP: 90212 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>S-1MEF <SEQUENCE>1 <FILENAME>gtbp_s1mef.htm <DESCRIPTION>S-1MEF <TEXT> Document 1 - file: gtbp_s1mef.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-5.1 <SEQUENCE>2 <FILENAME>gtbp_ex51.htm <DESCRIPTION>OPINION OF BAKER & MCKENZIE LLP <TEXT> Document 2 - file: gtbp_ex51.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-23.1 <SEQUENCE>3 <FILENAME>gtbp_ex231.htm <DESCRIPTION>CONSENT OF SELIGSON & GIANNATTASIO, LLP <TEXT> Document 3 - file: gtbp_ex231.htm
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