<SEC-DOCUMENT>0001179110-17-009994.txt : 20170705
<SEC-HEADER>0001179110-17-009994.hdr.sgml : 20170705
<ACCEPTANCE-DATETIME>20170705163249
ACCESSION NUMBER:		0001179110-17-009994
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170703
FILED AS OF DATE:		20170705
DATE AS OF CHANGE:		20170705

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Celldex Therapeutics, Inc.
		CENTRAL INDEX KEY:			0000744218
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				133191702
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		53 FRONTAGE ROAD
		STREET 2:		SUITE 220
		CITY:			HAMPTON
		STATE:			NJ
		ZIP:			08827
		BUSINESS PHONE:		908-200-7500

	MAIL ADDRESS:	
		STREET 1:		53 FRONTAGE ROAD
		STREET 2:		SUITE 220
		CITY:			HAMPTON
		STATE:			NJ
		ZIP:			08827

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AVANT IMMUNOTHERAPEUTICS INC
		DATE OF NAME CHANGE:	19980828

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	T CELL SCIENCES INC
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			McMahon Gerald PhD
		CENTRAL INDEX KEY:			0001290747

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-15006
		FILM NUMBER:		17948566

	MAIL ADDRESS:	
		STREET 1:		300 ELLIOTT AVENUE WEST
		STREET 2:		SUITE 500
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98119-4114
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-07-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000744218</issuerCik>
        <issuerName>Celldex Therapeutics, Inc.</issuerName>
        <issuerTradingSymbol>CLDX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001290747</rptOwnerCik>
            <rptOwnerName>McMahon Gerald PhD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CELLDEX THERAPEUTICS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>53  FRONTAGE ROAD, SUITE 220</rptOwnerStreet2>
            <rptOwnerCity>HAMPTON</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>08827</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2017-07-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2869</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.47</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>232953</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">On November 28, 2016, in connection with the Reporting Person's employment separation agreement with Kolltan Pharmaceuticals, Inc., Reporting Person entered into a severance agreement (the &quot;Severance Agreement&quot;) with Celldex Therapeutics, Inc. (&quot;Issuer&quot;) whereby Issuer agreed to pay Reporting Person 267,356 shares of its common stock, par value $0.001 per share (&quot;Common Stock&quot;) less required tax and other withholdings (the &quot;Withholdings&quot;). The Reporting Person previously reported ownership of such 267,356 shares on his Form 3 filed with the Securities and Exchange Commission on December 15, 2016. The shares, less Withholdings, are issuable to Reporting Person in equal monthly installments through December 2018.</footnote>
        <footnote id="F2">Pursuant to the Severance Agreement, on July 3, 2017, the Issuer issued 5,485 shares of its Common Stock to the Reporting Person. This Form 4 reflects the disposition to the Issuer of 2,869 shares of its Common Stock to satisfy required Withholdings in connection with such issuance of Common Stock to the Reporting Person.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Samuel B. Martin, attorney-in-fact for Gerald McMahon</signatureName>
        <signatureDate>2017-07-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.HTML
<SEQUENCE>2
<FILENAME>mcmahon_poa2017.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>POWER OF ATTORNEY</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Know all by those present,
that the undersigned hereby constitutes and appoints each of Samuel B. Martin and Anthony S. Marucci his true and lawful attorney-in-fact
to:</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in">1.</TD><TD STYLE="text-align: justify">execute for and on behalf of the undersigned Schedules 13D and 13G, Form ID, and Forms 3, 4 and
5 in accordance with Sections 13 and 16(a) of the Securities Exchange Act of 1934 and the rules thereunder;</TD></TR></TABLE>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in">2.</TD><TD STYLE="text-align: justify">do and perform any and all acts for and on behalf of the undersigned which may be necessary or
desirable to complete and execute any such Schedules 13D or 13G, Form ID and Forms 3, 4 or 5, and the timely filing of such Forms
with the United States Securities and Exchange Commission and any other authority; and</TD></TR></TABLE>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 0 0 1in; text-align: justify; text-indent: -0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in">3.</TD><TD STYLE="text-align: justify">take any other action of any type whatsoever in connection with the foregoing which, in the opinion
of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, including without
limitation the execution and filing of a Form 4 with respect to a transaction which may be reported on a Form 5, it being understood
that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in
such form and shall contain such terms and conditions as such attorney-in-fact may approve in his discretion.</TD></TR></TABLE>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">The undersigned hereby
grants to each such attorney-in-fact full power and authority to do and perform all and every act and thing whatsoever requisite,
necessary and proper to be done in the exercise of any of the rights and powers herein granted, as fully and to all intents and
purposes as he might or could do in person, with full power of substitution and resubstitution, hereby ratifying and confirming
all that such attorney-in-fact, or his substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power
of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving
in such capacity at the request of the undersigned, are not assuming any of the undersigned's responsibilities to comply with Sections
13 and 16 of the Securities Exchange Act of 1934.</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">IN WITNESS WHEREOF, the
undersigned has caused this Power of Attorney to be executed as of this 15th day of June, 2017.</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><U>/s/ Gerald McMahon</U></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Name: Gerald McMahon</P>



<P STYLE="margin: 0"></P>

</BODY>
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</DOCUMENT>
</SEC-DOCUMENT>
