Exhibit 99.1

MDC PARTNERS INC.

SCHEDULE OF CURRENT AND POTENTIAL MARKETING

COMMUNICATIONS COMPANY OWNERSHIP

	% Owned at 3/31/13			Year of Initial Investment	Put/Call Options
Company					2013			Thereafter
					(See Notes)
Consolidated:
Strategic Marketing Services
72andSunny		51.0	%	2010		—		Note 1
Allison & Partners		51.0	%	2010		—		Note 2
Anomaly		60.0	%	2011		—		Note 3
Attention		60.8	%	2009		—		Note 4
Bruce Mau Design		100.0	%	2004		—		Note 5
Capital C Partners		82.1	%	2010		—		Note 6
Colle + McVoy		95.0	%	1999		100.0	%	Note 7
Concentric Partners		70.0	%	2011		—		Note 8
Crispin Porter + Bogusky		100.0	%	2001		—		Note 9
Hello Design		49.0	%	2004		—
Doner		30.0	%	2012		70.0	%	Note 10
Dotbox		100.0	%	2012		—
henderson bas kohn		100.0	%	2004		—		Note 11
HL Group Partners		92.8	%	2007		—
kirshenbaum bond senecal + partners		100.0	%	2004		—		Note 12
The Media Kitchen		100.0	%	2010		—
Varick Media Management		100.0	%	2010		—
Kwittken		60.0	%	2010		—		Note 13
Laird + Partners		65.0	%	2011		—		Note 14
Mono Advertising		49.9	%	2004		70.0	%	Note 15
Redscout		100.0	%	2007		—
Sloane & Company		70.0	%	2010		—		Note 16
Union		70.0	%	2013		—		Note 17
Veritas		95.0	%	1993		96.0	%	Note 18
Vitro		71.4	%	2004		—		Note 19
Yamamoto		100.0	%	2000		—
Performance Marketing Services
6degrees Communications		66.3	%	1993		77.3	%	Note 20
Accent		100.0	%	1999		—
AIC Publishing		51.0	%	2011		—
Boom Marketing		85.0	%	2005		—
Onbrand		100.0	%	1992		—
Bryan Mills Iradesso		62.8	%	1989		100.0	%	Note 21
Computer Composition		100.0	%	1988		—
Integrated Media Solutions		100.0	%	2010		—		Note 22
Kenna Communications		80.0	%	2010		—		Note 23
Maxxcom Global Media		100.0	%	2012		—
Northstar Research Partners		91.8	%	1998		100.0	%	Note 24
Relevent		60.0	%	2010		—
RJ Palmer		100.0	%	2011		—
Source Marketing		91.0	%	1998		—		Note 25
Communifx		100.0	%	2010		—		Note 26
TargetCast		70.0	%	2012		—		Note 27
TargetCom		100.0	%	2000		—
TEAM		60.0	%	2010		100.0	%	Note 28
Trade X		75.0	%	2011		—		Note 29

Notes

(1) MDC has the right to increase its ownership interest in 72andSunny Partners LLC through acquisition of an incremental interest of up to 100% in 2016.

(2) MDC has the right to increase its ownership interest in Allison & Partners LLC through acquisition of an incremental interest, and other holders have the right to put only upon termination to MDC the same incremental interest up to 100% of this entity in 2015.

(3) MDC has the right to increase its ownership interest in Anomaly Partners LLC through acquisition of an incremental interest of up to 100% in 2015.

(4) Attention Partners LLC is owned by HL Group Partners, LLC. HL Group Partners, LLC has the right to increase its ownership in Attention Partners, LLC through acquisitions of incremental interests, and the other interest holders has the right to put to HL Group Partners, LLC the same incremental interests up to 100% only upon termination.

(5) Effective January 24, 2013, MDC owns 100% of the equity interests of each of Bruce Mau Holdings Ltd. And Bruce Mau Design (USA) LLC.

(6) MDC has the right to increase its ownership interest in Capital C Partners LP through acquisition of an incremental interests, up to 90% in 2015, and up to 100% in 2017.

(7) MDC has the right to increase its economic ownership in Colle + McVoy, LLC through acquisition of an incremental interest, and the other interest holder has the right to put to MDC the same incremental interest, up to 100% of this entity in 2013.

(8) MDC has the right to increase its ownership in Concentric Partners LLC through acquisition of an incremental interest of up to 100% in 2016.

(9) Includes Crispin Porter & Bogusky LLC, and certain other domestic and international operating subsidiaries.

(10) MDC has the right to increase its ownership in Doner Partners LLC through conversion of preferred interests and/or acquisitions of incremental interests, up to 70% of this entity in 2013 and up to 100% in 2017.

(11) Effective June 13, 2012, MDC increased its economic ownership in henderson bas kohn to 100%. Effective January 1, 2013, MDC merged the operations into Kenna Communications LP.

(12) Consists of Kirshenbaum Bond Senecal + Partners LLC, Kwittken PR LLC, Varick Media Management LLC, certain other domestic and international operating subsidiaries, and The Media Kitchen, a division of kirshenbaum bond senecal + partners.

(13) MDC has the right to increase its ownership in Kwittken PR LLC through acquisitions of incremental interests, up to 100% of this entity in 2015.

(14) MDC has the right to increase its ownership in Laird + Partners New York LLC through acquisition of an incremental interest of up to 100% in 2016.

(15) MDC has the right to increase its ownership in Mono Advertising, LLC through acquisitions of incremental interests, and the other interest holders have the right to put to MDC the same incremental interests, up to 70.0% in 2013 and up to 75.0% in 2014.

(16) MDC has the right to increase its ownership interest in Sloane & Company LLC through acquisition of incremental interests, and other interest holders have the right to put to MDC the same incremental interests up to 100% in 2015.

(17) MDC has the right to increase its ownership in Union Advertising Canada, LP through acquisition of incremental interests, up to 80% of this entity in 2018, 90% in 2019, and 100% in 2020.

TABLE OF CONTENTS

(18) MDC has the right to increase its ownership in Veritas Communications Inc. through acquisitions of incremental interests, and the other interest holders have the right to put to MDC the same incremental interests, up to 96% of this entity in 2013, up to 98.3% in 2014 and 100% in 2015.

(19) Effective January 1, 2012, Vitro Robertson, LLC and Skinny NYC, LLC were combined into a new entity Vitro Partners, LLC. MDC has the right to increase its ownership in Vitro Partners, LLC through acquisition interests, and other interest holders have the right to put to MDC the same incremental interests up to 77.9% of this entity in 2015, and up to 100% in 2017.

(20) Subject to certain conditions, MDC has the right to increase its ownership in 6degrees Integrated Communications Corp. through acquisitions of incremental interests, and the other interest holders have the right to put to MDC the same incremental interests up to 77.3% of this entity in 2013.

(21) MDC has the right to increase its ownership in Bryan Mills Iradesso, Corp. through acquisition of an incremental interest, and the other interest holders have the right to put to MDC the same incremental interest, up to 100% of this entity in 2013.

(22) Effective December 13, 2012, MDC increased its ownership interest in Integrated Media Solutions Partners LLC to 100%.

(23) MDC has the right to increase its ownership interest in Kenna Communications LP through acquisition of an incremental interest, up to 100% in 2015.

(24) The Northstar Research Partners Group consists of Northstar Research Holdings USA LP and Northstar Research Holdings Canada Inc. MDC has the right to increase its ownership in Northstar Research Canada through acquisitions of incremental interests, and the other holders have the right to put to MDC the same incremental interests, up to 100% of this entity in 2013.

(25) Effective October 1, 2012, MDC increased its ownership interest in Source Marketing, LLC. MDC has the right to increase its ownership in Source Marketing, LLC through acquisitions of incremental interests, and the other interest holders have the right to put to MDC the same incremental interests up to 100% in 2015.

(26) Effective April 1, 2012, MDC increased its ownership interest in Communifx Partners to 100%. In addition, MDC has merged the operations into Source Marketing, LLC.

(27) MDC has the right to increase its ownership in TargetCast LLC through acquisitions of incremental interests of up to 75% of this entity in 2015, 80% in 2016, and 100% in 2017.

(28) TEAM consists of The Arsenal LLC (f/k/a Team Holdings LLC) and its wholly-owned subsidiaries. MDC has the right to increase its ownership in The Arsenal, LLC, through acquisition of an incremental interest, up to 100% of this entity in 2013.

(29) MDC has the right to increase its ownership interest in Trade X Partners LLC through acquisitions of incremental interests up to 100% in 2015.