<SEC-DOCUMENT>0000939798-17-000102.txt : 20171201
<SEC-HEADER>0000939798-17-000102.hdr.sgml : 20171201
<ACCEPTANCE-DATETIME>20171201191259
ACCESSION NUMBER:		0000939798-17-000102
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170901
FILED AS OF DATE:		20171201
DATE AS OF CHANGE:		20171201

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cataldo Tony
		CENTRAL INDEX KEY:			0001450565

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-08092
		FILM NUMBER:		171235261

	MAIL ADDRESS:	
		STREET 1:		C/O 475 INDUSTRIAL BLVD
		CITY:			WEST CHICAGO
		STATE:			IL
		ZIP:			60106

ISSUER:		

	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

	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>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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    <periodOfReport>2017-09-01</periodOfReport>

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        <issuerName>GT Biopharma, Inc.</issuerName>
        <issuerTradingSymbol>GTBP</issuerTradingSymbol>
    </issuer>

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        <reportingOwnerId>
            <rptOwnerCik>0001450565</rptOwnerCik>
            <rptOwnerName>Cataldo Tony</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1825 K STREET, SUITE 510</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WASHINGTON</rptOwnerCity>
            <rptOwnerState>DC</rptOwnerState>
            <rptOwnerZipCode>20006</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Chairman</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                    <value>0</value>
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    <ownerSignature>
        <signatureName>/s/Anthony J Cataldo</signatureName>
        <signatureDate>2017-12-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
