<SEC-DOCUMENT>0001172661-17-000692-index.html : 20170214
<SEC-HEADER>0001172661-17-000692.hdr.sgml : 20170214
<ACCEPTANCE-DATETIME>20170214105202
ACCESSION NUMBER:		0001172661-17-000692
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20170214
DATE AS OF CHANGE:		20170214

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 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-53561
		FILM NUMBER:		17604165

	BUSINESS ADDRESS:	
		STREET 1:		745 FIFTH AVENUE, 19TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10151
		BUSINESS PHONE:		646 429 1800

	MAIL ADDRESS:	
		STREET 1:		745 FIFTH AVENUE, 19TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10151

	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:			Roystone Capital Management LP
		CENTRAL INDEX KEY:			0001582271
		IRS NUMBER:				900907631
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1213

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		780 THIRD AVENUE, 41ST FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		212-326-6010

	MAIL ADDRESS:	
		STREET 1:		780 THIRD AVENUE, 41ST FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>mdca123116a3.htm
<DESCRIPTION>13G/A
<TEXT>
Document 1 - file: mdca123116a3.htm

</DOCUMENT>
</SEC-DOCUMENT>