<SEC-DOCUMENT>0001213900-26-029983.txt : 20260318
<SEC-HEADER>0001213900-26-029983.hdr.sgml : 20260318
<ACCEPTANCE-DATETIME>20260318085611
ACCESSION NUMBER:		0001213900-26-029983
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260318
FILED AS OF DATE:		20260318
DATE AS OF CHANGE:		20260318

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Goodwin Bruce Michael
		CENTRAL INDEX KEY:			0002120535
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-41621
		FILM NUMBER:		26765872

	MAIL ADDRESS:	
		ADDRESS IS A NON US LOCATION: 	YES
		STREET 1:		SUITE 1 LEVEL 3, 62 LYGON STREET
		CITY:			CARLTON SOUTH, VIC
		PROVINCE COUNTRY:   	C3
		ZIP:			3053

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Radiopharm Theranostics Ltd
		CENTRAL INDEX KEY:			0001949257
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				000000000
		STATE OF INCORPORATION:			C3
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		ADDRESS IS A NON US LOCATION: 	YES
		STREET 1:		LEVEL 3, 62 LYGON STREET
		CITY:			CARLTON VIC
		PROVINCE COUNTRY:   	C3
		ZIP:			3053
		BUSINESS PHONE:		61 3 9824 5254

	MAIL ADDRESS:	
		ADDRESS IS A NON US LOCATION: 	YES
		STREET 1:		LEVEL 3, 62 LYGON STREET
		CITY:			CARLTON VIC
		PROVINCE COUNTRY:   	C3
		ZIP:			3053
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>ownership.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-03-18</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001949257</issuerCik>
        <issuerName>Radiopharm Theranostics Ltd</issuerName>
        <issuerTradingSymbol>RADX</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002120535</rptOwnerCik>
            <rptOwnerName>Goodwin Bruce Michael</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>true</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>SUITE 1 LEVEL 3, 62 LYGON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CARLTON SOUTH, VICTORIA</rptOwnerCity>
            <rptOwnerNonUSStateTerritory></rptOwnerNonUSStateTerritory>
            <rptOwnerCountry>C3</rptOwnerCountry>
            <rptOwnerZipCode>3053</rptOwnerZipCode>
            <rptOwnerStateDescription>AUSTRALIA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>/s/ Bruce Michael Goodwin</signatureName>
        <signatureDate>2026-03-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
