    <SEC-DOCUMENT>0001104659-19-006667-index.html : 20190208
    <SEC-HEADER>0001104659-19-006667.hdr.sgml : 20190208
    <ACCEPTANCE-DATETIME>20190208114932
    ACCESSION NUMBER:		0001104659-19-006667
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		7
    CONFORMED PERIOD OF REPORT:	20190208
    ITEM INFORMATION:		Material Modifications to Rights of Security Holders
    ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20190208
    DATE AS OF CHANGE:		20190208

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-15006
    		FILM NUMBER:		19578678

    	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
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>a19-4170_18k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a19-4170_18k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.1
    <SEQUENCE>2
    <FILENAME>a19-4170_1ex3d1.htm
    <DESCRIPTION>EX-3.1
    <TEXT>
    Document 2 - file: a19-4170_1ex3d1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-4.1
    <SEQUENCE>3
    <FILENAME>a19-4170_1ex4d1.htm
    <DESCRIPTION>EX-4.1
    <TEXT>
    Document 3 - file: a19-4170_1ex4d1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>4
    <FILENAME>a19-4170_1ex99d1.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 4 - file: a19-4170_1ex99d1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g41701kwi001.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g41701kwi001.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g41701kxi001.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g41701kxi001.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g41701mmi001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g41701mmi001.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>