<SEC-DOCUMENT>0001437749-21-014666-index.html : 20210614
<SEC-HEADER>0001437749-21-014666.hdr.sgml : 20210614
<ACCEPTANCE-DATETIME>20210614081748
ACCESSION NUMBER:		0001437749-21-014666
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		27
FILED AS OF DATE:		20210614
DATE AS OF CHANGE:		20210614
GROUP MEMBERS:		MARK J. PENN

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:		211013362

	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>sah20210613_sc13da.htm
<DESCRIPTION>SCHEDULE 13D/A
<TEXT>
Document 1 - file: sah20210613_sc13da.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.N
<SEQUENCE>2
<FILENAME>ex_257051.htm
<DESCRIPTION>EXHIBIT 99.N
<TEXT>
Document 2 - file: ex_257051.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.O
<SEQUENCE>3
<FILENAME>ex_257052.htm
<DESCRIPTION>EXHIBIT 99.O
<TEXT>
Document 3 - file: ex_257052.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.P
<SEQUENCE>4
<FILENAME>ex_257053.htm
<DESCRIPTION>EXHIBIT 99.P
<TEXT>
Document 4 - file: ex_257053.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>a01.jpg
<TEXT>
Document 5 - file: a01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>a02.jpg
<TEXT>
Document 6 - file: a02.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>a03.jpg
<TEXT>
Document 7 - file: a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>a04.jpg
<TEXT>
Document 8 - file: a04.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>a05.jpg
<TEXT>
Document 9 - file: a05.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>a06.jpg
<TEXT>
Document 10 - file: a06.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>a07.jpg
<TEXT>
Document 11 - file: a07.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>a08.jpg
<TEXT>
Document 12 - file: a08.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>a09.jpg
<TEXT>
Document 13 - file: a09.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>a10.jpg
<TEXT>
Document 14 - file: a10.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>a11.jpg
<TEXT>
Document 15 - file: a11.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>a12.jpg
<TEXT>
Document 16 - file: a12.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>a13.jpg
<TEXT>
Document 17 - file: a13.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>a14.jpg
<TEXT>
Document 18 - file: a14.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>a15.jpg
<TEXT>
Document 19 - file: a15.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>20
<FILENAME>a16.jpg
<TEXT>
Document 20 - file: a16.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>21
<FILENAME>a17.jpg
<TEXT>
Document 21 - file: a17.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>22
<FILENAME>a18.jpg
<TEXT>
Document 22 - file: a18.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>23
<FILENAME>a19.jpg
<TEXT>
Document 23 - file: a19.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>24
<FILENAME>a20.jpg
<TEXT>
Document 24 - file: a20.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>25
<FILENAME>logo.jpg
<TEXT>
Document 25 - file: logo.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>26
<FILENAME>logoa.jpg
<TEXT>
Document 26 - file: logoa.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>27
<FILENAME>sig.jpg
<TEXT>
Document 27 - file: sig.jpg

</DOCUMENT>
</SEC-DOCUMENT>