    <SEC-DOCUMENT>0001104659-21-063346-index.html : 20210510
    <SEC-HEADER>0001104659-21-063346.hdr.sgml : 20210510
    <ACCEPTANCE-DATETIME>20210510062944
    ACCESSION NUMBER:		0001104659-21-063346
    CONFORMED SUBMISSION TYPE:	424B3
    PUBLIC DOCUMENT COUNT:		19
    FILED AS OF DATE:		20210510
    DATE AS OF CHANGE:		20210510

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MDC PARTNERS INC
    		CENTRAL INDEX KEY:			0000876883
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ADVERTISING AGENCIES [7311]
    		IRS NUMBER:				980364441
    		STATE OF INCORPORATION:			A6
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		424B3
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-252829
    		FILM NUMBER:		21905141

    	BUSINESS ADDRESS:
    		STREET 1:		ONE WORLD TRADE CENTER, FLOOR 65
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10007
    		BUSINESS PHONE:		646 429 1800

    	MAIL ADDRESS:
    		STREET 1:		ONE WORLD TRADE CENTER, FLOOR 65
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10007

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MDC CORP INC
    		DATE OF NAME CHANGE:	20001204

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MDC COMMUNICATIONS CORP
    		DATE OF NAME CHANGE:	19961028

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MDC CORPORATION
    		DATE OF NAME CHANGE:	19950419

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			New MDC LLC
    		CENTRAL INDEX KEY:			0001841050
    		IRS NUMBER:				861390679
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		424B3
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-252829-01
    		FILM NUMBER:		21905142

    	BUSINESS ADDRESS:
    		STREET 1:		ONE WORLD TRADE CENTER
    		STREET 2:		FLOOR 65
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10007
    		BUSINESS PHONE:		6464291837

    	MAIL ADDRESS:
    		STREET 1:		ONE WORLD TRADE CENTER
    		STREET 2:		FLOOR 65
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10007
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>424B3
    <SEQUENCE>1
    <FILENAME>tm214718-15_424b3.htm
    <DESCRIPTION>424B3
    <TEXT>
    Document 1 - file: tm214718-15_424b3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>lg_kings-advisor.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: lg_kings-advisor.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>lg_mdcp-4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: lg_mdcp-4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>lg_moelis.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: lg_moelis.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>lg_pwc-4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: lg_pwc-4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>sg_canacord-4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: sg_canacord-4c.jpg

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

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>sg_pricewaterhousellp-bw.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: sg_pricewaterhousellp-bw.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>tm214718d1-fc_mdc4clr.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: tm214718d1-fc_mdc4clr.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>tm214718d1-ftr_address4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: tm214718d1-ftr_address4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>tm214718d1-ftr_losangeel4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: tm214718d1-ftr_losangeel4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>tm214718d1-htr_address4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: tm214718d1-htr_address4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>tm214718d15-px_mdcpar4clr.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: tm214718d15-px_mdcpar4clr.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>tm214718d15-px_qrcodebw.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: tm214718d15-px_qrcodebw.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>tm214718d3-fc_combine4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: tm214718d3-fc_combine4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>tm214718d3-hr_rockfell4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: tm214718d3-hr_rockfell4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>tm214718d3-px_signedbw.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: tm214718d3-px_signedbw.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>tm214718d3-px_tovotebw.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: tm214718d3-px_tovotebw.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>tm214718d9-px_transbwlr.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: tm214718d9-px_transbwlr.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>