<SEC-DOCUMENT>0001104659-21-051565-index.html : 20210623
<SEC-HEADER>0001104659-21-051565.hdr.sgml : 20210623
<ACCEPTANCE-DATETIME>20210419060144
<PRIVATE-TO-PUBLIC>
ACCESSION NUMBER:		0001104659-21-051565
CONFORMED SUBMISSION TYPE:	CORRESP
PUBLIC DOCUMENT COUNT:		8
FILED AS OF DATE:		20210419

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:		CORRESP

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>CORRESP
<SEQUENCE>1
<FILENAME>filename1.htm
<TEXT>
Document 1 - file: filename1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>tm214718d8_correspimg002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: tm214718d8_correspimg002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>tm214718d8_correspimg003.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: tm214718d8_correspimg003.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>tm214718d8_correspimg004.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: tm214718d8_correspimg004.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>tm214718d8_correspimg005.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: tm214718d8_correspimg005.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>tm214718d8_correspimg007.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: tm214718d8_correspimg007.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>tm214718d8_correspimgg003.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: tm214718d8_correspimgg003.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>tm214718d8_correspimgg004.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: tm214718d8_correspimgg004.jpg

</DOCUMENT>
</SEC-DOCUMENT>