<SEC-DOCUMENT>0001437749-21-017039-index.html : 20210716
<SEC-HEADER>0001437749-21-017039.hdr.sgml : 20210716
<ACCEPTANCE-DATETIME>20210716083030
ACCESSION NUMBER:		0001437749-21-017039
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20210716
DATE AS OF CHANGE:		20210716
GROUP MEMBERS:		MARK J. PENN
GROUP MEMBERS:		STAGWELL GROUP LLC

SUBJECT COMPANY:	

	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:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-53561
		FILM NUMBER:		211094316

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Stagwell Agency Holdings LLC
		CENTRAL INDEX KEY:			0001771728
		IRS NUMBER:				833870147
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		1808 I STREENET, NW
		STREET 2:		6TH FLOOR
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20006
		BUSINESS PHONE:		9177652638

	MAIL ADDRESS:	
		STREET 1:		1808 I STREENET, NW
		STREET 2:		6TH FLOOR
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20006
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>sah20210715_sc13da.htm
<DESCRIPTION>SCHEDULE 13D/A
<TEXT>
Document 1 - file: sah20210715_sc13da.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.T
<SEQUENCE>2
<FILENAME>ex_264501.htm
<DESCRIPTION>EXHIBIT T
<TEXT>
Document 2 - file: ex_264501.htm

</DOCUMENT>
</SEC-DOCUMENT>