<SEC-DOCUMENT>0001104659-21-098461-index.html : 20210802
<SEC-HEADER>0001104659-21-098461.hdr.sgml : 20210802
<ACCEPTANCE-DATETIME>20210802060350
ACCESSION NUMBER:		0001104659-21-098461
CONFORMED SUBMISSION TYPE:	S-8 POS
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20210802
DATE AS OF CHANGE:		20210802
EFFECTIVENESS DATE:		20210802

FILER:

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

	FILING VALUES:
		FORM TYPE:		S-8 POS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-212261
		FILM NUMBER:		211134511

	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 PARTNERS INC
		DATE OF NAME CHANGE:	20040206

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8 POS
<SEQUENCE>1
<FILENAME>tm2123782d2_s8pos.htm
<DESCRIPTION>S-8 POS
<TEXT>
Document 1 - file: tm2123782d2_s8pos.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>tm2123782d2_ex5-1.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: tm2123782d2_ex5-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>tm2123782d2_ex23-1.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 3 - file: tm2123782d2_ex23-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>image_001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: image_001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>image_002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: image_002.jpg

</DOCUMENT>
</SEC-DOCUMENT>