<SEC-DOCUMENT>0000921895-15-001232.txt : 20150508
<SEC-HEADER>0000921895-15-001232.hdr.sgml : 20150508
<ACCEPTANCE-DATETIME>20150508180615
ACCESSION NUMBER:		0000921895-15-001232
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150506
FILED AS OF DATE:		20150508
DATE AS OF CHANGE:		20150508

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Actinium Pharmaceuticals, Inc.
		CENTRAL INDEX KEY:			0001388320
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				880378336
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		546 5TH AVENUE, 14TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036
		BUSINESS PHONE:		212-300-2131

	MAIL ADDRESS:	
		STREET 1:		546 5TH AVENUE, 14TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Cactus Ventures, Inc.
		DATE OF NAME CHANGE:	20070130

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Actinium Holdings, Ltd.
		CENTRAL INDEX KEY:			0001584730
		STATE OF INCORPORATION:			D0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36374
		FILM NUMBER:		15848170

	BUSINESS ADDRESS:	
		STREET 1:		C/O STERLLING MANAGEMENT (1985) LTD
		STREET 2:		STERLING HOUSE, 16W WESLEY ST.
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			HM11
		BUSINESS PHONE:		1 441-542-0659

	MAIL ADDRESS:	
		STREET 1:		C/O /O STERLING MANAGEMENT, LTD.
		STREET 2:		P.O. BOX HM 29
		CITY:			HAMILTON HM CX
		STATE:			D0
		ZIP:			00000

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			AHLB Holdings, LLC
		CENTRAL INDEX KEY:			0001566788
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36374
		FILM NUMBER:		15848171

	BUSINESS ADDRESS:	
		STREET 1:		C/O MSKCC
		STREET 2:		1275 YORK AVE.
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10065
		BUSINESS PHONE:		212-639-2000

	MAIL ADDRESS:	
		STREET 1:		C/O MSKCC
		STREET 2:		1275 YORK AVE.
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10065

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Memorial Sloan-Kettering Cancer Center
		CENTRAL INDEX KEY:			0001566787
		STATE OF INCORPORATION:			NY

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36374
		FILM NUMBER:		15848172

	BUSINESS ADDRESS:	
		STREET 1:		1275 YORK AVE.
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10065
		BUSINESS PHONE:		212-639-2000

	MAIL ADDRESS:	
		STREET 1:		1275 YORK AVE.
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10065
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form410109002_05082015.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-05-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001388320</issuerCik>
        <issuerName>Actinium Pharmaceuticals, Inc.</issuerName>
        <issuerTradingSymbol>ATNM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001566787</rptOwnerCik>
            <rptOwnerName>Memorial Sloan-Kettering Cancer Center</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1275 YORK AVE.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10065</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001566788</rptOwnerCik>
            <rptOwnerName>AHLB Holdings, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MSKCC</rptOwnerStreet1>
            <rptOwnerStreet2>1275 YORK AVE.</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10065</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001584730</rptOwnerCik>
            <rptOwnerName>Actinium Holdings, Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O /O STERLING MANAGEMENT, LTD.</rptOwnerStreet1>
            <rptOwnerStreet2>P.O. BOX HM 29</rptOwnerStreet2>
            <rptOwnerCity>HAMILTON HM CX</rptOwnerCity>
            <rptOwnerState>D0</rptOwnerState>
            <rptOwnerZipCode>00000</rptOwnerZipCode>
            <rptOwnerStateDescription>BERMUDA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2015-05-06</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5702387</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5702387</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents a transfer of shares previously held directly by Actinium Holdings Ltd. (&quot;AHL&quot;) to Memorial Sloan-Kettering Cancer Center (&quot;MSKCC&quot;). MSKCC owns all of the membership interests in AHLB Holdings, LLC (&quot;AHLB&quot;), which owns all of the outstanding shares of AHL. As a result of the transfer, AHL and AHLB are no longer deemed a beneficial owner of the shares. With respect to MSKCC, the transfer constitutes a change in the form of beneficial interest from indirect to direct in accordance with Rule 16a-13.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Memorial Sloan-Kettering Cancer Center, By Eric Cottington, PhD, its Sr. Vice President, Research &amp; Technology Management</signatureName>
        <signatureDate>2015-05-08</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ AHLB Holdings, LLC, By Memorial Sloan-Kettering Cancer Center, its sole member, By Eric Cottington, PhD, its Sr. Vice President, Research &amp; Technology Management</signatureName>
        <signatureDate>2015-05-08</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Actinium Holdings Ltd., By Eric Cottington, PhD, its President</signatureName>
        <signatureDate>2015-05-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
