10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549 

FORM 10-Q

(Mark One) 

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2021

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ______________ to ______________

Commission File Number: 001-13718 

MDC Partners Inc.

(Exact name of registrant as specified in its charter)

Canada		98-0364441
(State or other jurisdiction of incorporation or organization)		(IRS Employer Identification No.)
One World Trade Center, Floor 65
New York,	New York	10007
(Address of principal executive offices)		(Zip Code)

(646) 429-1800

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Class A Subordinate Voting Shares, no par value	MDCA	NASDAQ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes   ☒   No   ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  Yes  ☒ No   ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated Filer	☐	Accelerated Filer	☒
Non-accelerated Filer	☐	Smaller reporting company	☒
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes   ☐ No   ☒

The number of common shares outstanding as of April 30, 2021 was 77,181,293 Class A subordinate voting shares and 3,743 Class B multiple voting shares.

MDC PARTNERS INC.

QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS

		Page
	PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements	4
	Unaudited Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2021 and 2020	4
	Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three Months Ended March 31, 2021 and 2020	5
	Unaudited Condensed Consolidated Balance Sheets as of March 31, 2021 and December 31, 2020	6
	Unaudited Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2021 and 2020	7
	Unaudited Condensed Consolidated Statements of Shareholders’ Deficit for the Three Months Ended March 31, 2021 and 2020	8
	Notes to Unaudited Condensed Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	42
Item 4.	Controls and Procedures	42
	PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	43
Item 1A.	Risk Factors	43
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	43
Item 3.	Defaults Upon Senior Securities	43
Item 4.	Mine Safety Disclosures	43
Item 5.	Other Information	44
Item 6.	Exhibits	45
Signatures		46

References in this Quarterly Report on Form 10-Q to “MDC Partners,” “MDC,” the “Company,” “we,” “us” and “our” refer to MDC Partners Inc. and, unless the context otherwise requires or otherwise is expressly stated, its subsidiaries. References in this Quarterly Report on Form 10-Q to “Partner Firms” generally refer to the Company’s subsidiary agencies.

All dollar amounts are stated in U.S. dollars unless otherwise stated.

                Note About Forward-Looking Statements

This document contains forward-looking statements. The Company’s representatives may also make forward-looking statements orally or in writing from time to time. Statements in this document that are not historical facts, including, statements about the Company’s beliefs and expectations, recent business and economic trends, potential acquisitions, and estimates of amounts for redeemable noncontrolling interests and deferred acquisition consideration, constitute forward-looking statements. These statements are based on current plans, estimates and projections, and are subject to change based on a number of factors, including those outlined in this section. These forward-looking statements are subject to various risks and uncertainties, many of which are outside the Company’s control. Therefore, you should not place undue reliance on such statements. Forward-looking statements speak only as of the date they are made, and the Company undertakes no obligation to update publicly any of them in light of new information or future events, if any.

2

Forward-looking statements involve inherent risks and uncertainties. A number of important factors could cause actual results to differ materially from those contained in any forward-looking statements. Such risk factors include, but are not limited to, the following:

•risks associated with international, national and regional unfavorable economic conditions that could affect the Company or its clients, including as a result of the novel coronavirus pandemic (“COVID-19”);

•the effects of the outbreak of COVID-19, including the measures to reduce its spread, and the impact on the economy and demand for our services, which may precipitate or exacerbate other risks and uncertainties;

•an inability to realize expected benefits of the proposed redomiciliation of the Company from the federal jurisdiction of Canada to the State of Delaware (the “Redomiciliation”) and the subsequent combination of the Company’s business with the business of the subsidiaries of Stagwell Media LP (“Stagwell”) that own and operate a portfolio of marketing services companies (the “Business Combination” and, together with the Redomiciliation, the “Proposed Transaction”) or the occurrence of difficulties in connection with the Proposed Transaction;

•adverse tax consequences in connection with the Proposed Transaction for the Company, its operations and its shareholders, that may differ from the expectations of the Company, including that future changes in tax law, potential increases to corporate tax rates in the United States and disagreements with the tax authorities on the Company’s determination of value and computations of its attributes may result in increased tax costs;

•the occurrence of material Canadian federal income tax (including material “emigration tax”) as a result of the Proposed Transaction;

•the impact of uncertainty associated with the Proposed Transaction on the Company’s businesses;

•direct or indirect costs associated with the Proposed Transaction, which could be greater than expected;

•the risk that a condition to completion of the Proposed Transaction may not be satisfied and the Proposed Transaction may not be completed;

•the risk of parties challenging the Proposed Transaction or the impact of the Proposed Transaction on the Company’s debt arrangements;

•the Company’s ability to attract new clients and retain existing clients;

•reduction in client spending and changes in client advertising, marketing and corporate communications requirements;

•financial failure of the Company’s clients;

•the Company’s ability to retain and attract key employees;

•the Company’s ability to achieve the full amount of its stated cost saving initiatives;

•the Company’s implementation of strategic initiatives;

•the Company’s ability to remain in compliance with its debt agreements and the Company’s ability to finance its contingent payment obligations when due and payable, including but not limited to those relating to redeemable noncontrolling interests and deferred acquisition consideration;

•the successful completion and integration of acquisitions which complement and expand the Company’s business capabilities; and

•foreign currency fluctuations.

Investors should carefully consider these risk factors, other risk factors described herein, and the additional risk factors outlined in more detail in the Company’s 2020 Form 10-K, filed with the Securities and Exchange Commission (the “SEC”) on March 16, 2021 and accessible on the SEC’s website at www.sec.gov., under the caption “Risk Factors,” and in the Company’s other SEC filings.

3

PART I. FINANCIAL INFORMATION

Item 1.    Financial Statements

MDC PARTNERS INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(thousands of United States dollars, except per share amounts)

	Three Months Ended March 31,
	2021		2020
Revenue:
Services	$	307,585	$	327,742
Operating Expenses
Cost of services sold	186,921		222,694
Office and general expenses	83,946		66,354
Depreciation and amortization	8,176		9,206
Impairment and other losses	875		161
	279,918		298,415
Operating income	27,667		29,327
Other Income (expenses):
Interest expense and finance charges, net	(19,065)		(15,611)
Foreign exchange gain (loss)	2,080		(14,757)
Other, net	614		16,334
	(16,371)		(14,034)
Income before income taxes and equity in earnings of non-consolidated affiliates	11,296		15,293
Income tax expense	1,302		13,500
Income before equity in earnings of non-consolidated affiliates	9,994		1,793
Equity in losses of non-consolidated affiliates	(493)		—
Net income	9,501		1,793
Net income attributable to the noncontrolling interest	(4,491)		(791)
Net income attributable to MDC Partners Inc.	5,010		1,002
Accretion on and net income allocated to convertible preference shares	(4,089)		(3,440)
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	921	$	(2,438)
Income (loss) Per Common Share:
Basic
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	0.01	$	(0.03)
Diluted
Net income (loss) attributable to MDC Partners Inc common shareholders	$	0.01	$	(0.03)
Weighted Average Number of Common Shares Outstanding:
Basic	73,392,824		72,397,661
Diluted	75,439,066		72,397,661

See notes to the Unaudited Condensed Consolidated Financial Statements.

4

MDC PARTNERS INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(thousands of United States dollars)

	Three Months Ended March 31,
	2021		2020
Comprehensive Income
Net income	$	9,501	$	1,793
Other comprehensive income (loss), net of applicable tax:
Foreign currency translation adjustment	(3,507)		7,429
Other comprehensive income (loss)	(3,507)		7,429
Comprehensive income for the period	5,994		9,222
Comprehensive income attributable to the noncontrolling interests	(3,539)		(282)
Comprehensive income attributable to MDC Partners Inc.	$	2,455	$	8,940

See notes to the Unaudited Condensed Consolidated Financial Statements.

5

MDC PARTNERS INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(thousands of United States dollars)

	March 31, 2021		December 31, 2020
ASSETS
Current Assets:
Cash and cash equivalents	$	113,340	$	60,757
Accounts receivable, less allowance for doubtful accounts of $4,498 and $5,473	377,670		374,892
Expenditures billable to clients	22,824		10,552
Other current assets	31,687		40,938
Total Current Assets	545,521		487,139
Fixed assets, at cost, less accumulated depreciation of $137,729 and $136,166	85,085		90,413
Right-of-use assets - operating leases	207,418		214,188
Goodwill	669,060		668,211
Other intangible assets, net	30,784		33,844
Other assets	22,845		17,517
Total Assets	$	1,560,713	$	1,511,312
LIABILITIES, RNCI, AND SHAREHOLDERS’ DEFICIT
Current Liabilities
Accounts payable	$	209,679	$	168,396
Accruals and other liabilities	242,667		274,968
Advance billings	170,159		152,956
Current portion of lease liabilities - operating leases	41,229		41,208
Current portion of deferred acquisition consideration	52,156		53,730
Total Current Liabilities	715,890		691,258
Long-term debt	864,850		843,184
Long-term portion of deferred acquisition consideration	41,244		29,335
Long-term lease liabilities - operating leases	241,375		247,243
Other liabilities	77,585		82,065
Total Liabilities	1,940,944		1,893,085
Redeemable Noncontrolling Interests	25,352		27,137
Commitments, Contingencies and Guarantees (Note 9)
Shareholders' Deficit:
Convertible preference shares, 145,000 authorized, issued and outstanding at March 31, 2021 and December 31, 2020	152,746		152,746
Common stock and other paid-in capital	106,193		104,367
Accumulated deficit	(704,741)		(709,751)
Accumulated other comprehensive income	183		2,739
MDC Partners Inc. Shareholders' Deficit	(445,619)		(449,899)
Noncontrolling interests	40,036		40,989
Total Shareholders' Deficit	(405,583)		(408,910)
Total Liabilities, Redeemable Noncontrolling Interests and Shareholders' Deficit	$	1,560,713	$	1,511,312

See notes to the Unaudited Condensed Consolidated Financial Statements.

6

MDC PARTNERS INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(thousands of United States dollars)

	Three Months Ended March 31,
	2021		2020
Cash flows from operating activities:
Net income	$	9,501	$	1,793
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Stock-based compensation	(1,963)		3,070
Depreciation and amortization	8,176		9,206
Impairment and other losses	875		161
Adjustment to deferred acquisition consideration	11,685		(4,600)
Deferred income taxes	63		8,511
Foreign exchange and other	682		4,489
Changes in working capital:
Accounts receivable	(2,779)		41,148
Expenditures billable to clients	(12,272)		7,370
Prepaid expenses and other current assets	(7,615)		(3,385)
Accounts payable, accruals and other liabilities	23,977		(62,120)
Acquisition related payments	(473)		(782)
Advance billings	17,203		(24,816)
Net cash provided by (used in) operating activities	47,060		(19,955)
Cash flows from investing activities:
Capital expenditures	(13,423)		(1,546)
Proceeds from sale of assets	7,080		18,920
Acquisitions, net of cash acquired	—		(729)
Other	(689)		—
Net cash provided by (used in) investing activities	(7,032)		16,645
Cash flows from financing activities:
Repayment of borrowing under revolving credit facility	(140,950)		(125,333)
Proceeds from revolving credit facility	160,950		250,333
Acquisition related payments	(1,087)		(750)
Distributions to noncontrolling interests and other	(5,486)		(4,608)
Net cash provided by financing activities	13,427		119,642
Effect of exchange rate changes on cash and cash equivalents	(872)		(2,164)
Net increase in cash and cash equivalents	52,583		114,168
Cash and cash equivalents at beginning of period	60,757		106,933
Cash and cash equivalents at end of period	$	113,340	$	221,101
Supplemental disclosures:
Cash income taxes paid	$	251	$	849
Cash interest paid	$	317	$	145

See notes to the Unaudited Condensed Consolidated Financial Statements.

7

MDC PARTNERS INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ DEFICIT

(thousands of United States dollars, except share amounts)

	Three Months Ended
	March 31, 2021
	Convertible Preference Shares			Common Shares	Common Stock and Other Paid-in Capital		Accumulated Deficit		Accumulated Other Comprehensive Income		MDC Partners Inc. Shareholders' Deficit		Noncontrolling Interests		Total Shareholders' Deficit
	Shares	Amount		Shares
Balance at December 31, 2020	145,000	$	152,746	73,532,848	$	104,367	$	(709,751)	$	2,739	$	(449,899)	$	40,989	$	(408,910)
Net income attributable to MDC Partners Inc.	—	—		—	—		5,010		—		5,010		—		5,010
Other comprehensive loss	—	—		—	—		—		(2,555)		(2,555)		(952)		(3,507)
Vesting of restricted awards	—	—		1,322,732	—		—		—		—		—		—
Shares acquired and cancelled	—	—		(64,520)	(202)		—		—		(202)		—		(202)
Stock-based compensation	—	—		—	1,035		—		—		1,035		—		1,035
Changes in redemption value of redeemable noncontrolling interests	—	—		—	1,681		—		—		1,681		—		1,681
Business acquisitions and step-up transactions, net of tax	—	—		—	(330)		—		—		(330)		—		(330)
Other	—	—		—	(358)		—		(1)		(359)		(1)		(360)
Balance at March 31, 2021	145,000	$	152,746	74,791,060	$	106,193	$	(704,741)	$	183	$	(445,619)	$	40,036	$	(405,583)

	Three Months Ended
	March 31, 2020
	Convertible Preference Shares			Common Shares	Common Stock and Other Paid-in Capital		Accumulated Deficit		Accumulated Other Comprehensive Income		MDC Partners Inc. Shareholders' Deficit		Noncontrolling Interests		Total Shareholders' Deficit
	Shares	Amount		Shares
Balance at December 31, 2019	145,000	$	152,746	72,154,603	$	101,469	$	(480,779)	$	(4,269)	$	(230,833)	$	40,258	$	(190,575)
Net income attributable to MDC Partners Inc.	—	—		—	—		1,002		—		1,002		—		1,002
Other comprehensive income (loss)	—	—		—	—		—		7,938		7,938		(509)		7,429
Vesting of restricted awards	—	—		587,227	—		—		—		—		—		—
Shares acquired and cancelled	—	—		(258,664)	(637)		—		—		(637)		—		(637)
Stock-based compensation	—	—		—	476		—		—		476		—		476
Changes in redemption value of redeemable noncontrolling interests	—	—		—	(1,218)		—		—		(1,218)		—		(1,218)
Business acquisitions and step-up transactions, net of tax	—	—		—	(503)		—		—		(503)		—		(503)
Other	—	—		—	—		82		—		82		—		82
Balance at March 31, 2020	145,000	$	152,746	72,483,166	$	99,587	$	(479,695)	$	3,669	$	(223,693)	$	39,749	$	(183,944)

See notes to the Unaudited Condensed Consolidated Financial Statements

8

MDC PARTNERS INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(thousands of United States dollars, except per share amounts, unless otherwise stated)

1. Basis of Presentation and Recent Developments

MDC Partners Inc. (the “Company” or “MDC”), incorporated under the laws of Canada, is a leading provider of global marketing, advertising, activation, communications and strategic consulting solutions. Through its Networks (and underlying agencies generally referred to as “Partner Firms”), MDC delivers a wide range of customized services in order to drive growth and business performance for its clients.

The accompanying consolidated financial statements include the accounts of MDC, its subsidiaries and variable interest entities for which the Company is the primary beneficiary. MDC has prepared the unaudited condensed consolidated interim financial statements included herein in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for reporting interim financial information on Form 10-Q. Accordingly, the financial statements have been condensed and do not include certain information and disclosures pursuant to these rules. The preparation of financial statements in conformity with GAAP requires us to make judgments, assumptions and estimates about current and future results of operations and cash flows that affect the amounts reported and disclosed. Actual results could differ from these estimates and assumptions. The consolidated results for interim periods are not necessarily indicative of results for the full year and should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (“2020 10-K”).

The COVID-19 pandemic continues to negatively affect the global economy and the Company’s operations. The pandemic did not begin to impact the Company’s operations in a significant manner until the second quarter of 2020. Therefore, our first quarter of 2021 comparisons to the first quarter of 2020 are affected by the impact of the pandemic on our operations in the first quarter of 2021. Early in 2020, the Company took actions to combat the impact of COVID-19 on our operations. We will continue to monitor the worldwide public health threat, government actions to combat COVID-19 and the impact such developments may have on the overall economy, our clients and operations. If the impact of the pandemic is beyond our expectation, the Company believes it is well positioned through the actions implemented at the beginning of the pandemic to successfully work through the effects of COVID-19 in 2021. The impact of the pandemic and the corresponding actions are reflected in our judgments, assumptions and estimates in the preparation of the financial statements. The judgments, assumptions and estimates will be updated and could result in different results in the future depending on the continued impact of the COVID-19 pandemic.

The accompanying financial statements reflect all adjustments, consisting of normally recurring accruals, which in the opinion of management are necessary for a fair presentation, in all material respects, of the information contained therein. Intercompany balances and transactions have been eliminated in consolidation. Certain reclassifications have been made to the prior year financial information to conform to the current year presentation.

Recent Developments

On December 21, 2020, MDC and Stagwell Media LP (“Stagwell”) announced that they had entered into a definitive transaction agreement (the “Transaction Agreement”) providing for the combination of MDC with the subsidiaries of Stagwell that own and operate a portfolio of marketing services companies (the “Stagwell Entities”). The combination and related transactions, including the domestication of MDC to a Delaware corporation, are referred to as the “Transactions.” See “Item 1. Business – Recent Developments” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, filed on March 16, 2021, for a description of the Transactions.

On May 7, 2021, MDC’s proxy statement/prospectus on Form S-4, as filed on April 30, 2021, which describes the Transaction Agreement, the Transactions, and related ancillary agreements in more detail, was declared effective by the SEC. MDC’s Board of Directors has scheduled a special meeting of shareholders on June 22, 2021 for the Company’s shareholders to vote on proposals to approve the Transactions and related matters.

On April 26, 2021, the Company acquired the remaining 40% ownership interest of Gale Partners it did not already own for an aggregate purchase price of approximately $20,000. The purchase price will be made in a combination of cash and MDC Class A Common Shares, of which approximately $12,000 is deferred with payments due in April 2022 and 2023. As part of the closing date purchase price, the Company issued 2,131,574 Class A Common Shares to the seller in a private placement in reliance on exemptions from registration under the Securities Act of 1933, as amended.

9

2. Acquisitions and Dispositions

2020 Acquisition

On July 1, 2020, the Company acquired the remaining 10% ownership interest of Veritas it did not already own for an aggregate purchase price of $2,187, of which $1,087 was a deferred cash payment. As a result of the transaction, the Company reduced noncontrolling and redeemable noncontrolling interests by $2,651. The difference between the purchase price and the noncontrolling interest of $464 was recorded in Common stock and other paid-in capital in the Unaudited Condensed Consolidated Balance Sheets.

On March 19, 2020, the Company acquired the remaining 22.5% ownership interest of KWT Global it did not already own for an aggregate purchase price of $2,118, comprised of a closing cash payment of $729 and contingent deferred acquisition payments with an estimated present value at the acquisition date of $1,389. The contingent deferred payments were based on the financial results of the underlying business from 2019 to 2020 with final payment due in 2021. As a result of the transaction, the Company reduced redeemable noncontrolling interests by $1,615. The difference between the purchase price and the redeemable noncontrolling interest of $503 was recorded in Common stock and other paid-in capital in the Unaudited Condensed Consolidated Balance Sheets.

2020 Disposition

On February 14, 2020, the Company sold substantially all the assets and certain liabilities of Sloane and Company LLC (“Sloane”), an indirectly wholly owned subsidiary of the Company, to an affiliate of The Stagwell Group LLC (“Stagwell”), for an aggregate sale price of $26,696, consisting of cash received at closing plus contingent deferred payments expected to be paid over the next two years. The sale resulted in a gain of $16,827, which is included in Other, net within the Unaudited Condensed Consolidated Statements of Operations. Sloane was included within Allison & Partners which is included within the All Other category.

3. Revenue

The Company’s revenue recognition policies are established in accordance with ASC 606, and accordingly, revenue is recognized when control of the promised goods or services is transferred to our clients, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services.

The MDC network provides an extensive range of services to our clients, offering a variety of marketing and communication capabilities including strategy, creative and production for advertising campaigns across a variety of platforms (print, digital, social media, television broadcast), public relations services including strategy, editorial, crisis support or issues management, media training, influencer engagement and events management. We also provide media buying and planning across a range of platforms (out-of-home, paid search, social media, lead generation, programmatic, television broadcast), experiential marketing and application/website design and development.

The primary source of the Company’s revenue is from agency arrangements in the form of fees for services performed, commissions, and from performance incentives or bonuses, depending on the terms of the client contract. In all circumstances, revenue is only recognized when collection is reasonably assured. Certain of the Company’s contractual arrangements have more than one performance obligation. For such arrangements, revenue is allocated to each performance obligation based on its relative stand-alone selling price. Stand-alone selling prices are determined based on the prices charged to clients or using expected cost plus margin.

The determination of our performance obligations is specific to the services included within each contract. Based on a client’s requirements within the contract, and how these services are provided, multiple services could represent separate performance obligations or be combined and considered one performance obligation. Contracts that contain services that are not significantly integrated or interdependent, and that do not significantly modify or customize each other, are considered separate performance obligations. Typically, we consider media planning, media buying, creative (or strategy), production and experiential marketing services to be separate performance obligations if included in the same contract as each of these services can be provided on a stand-alone basis, and do not significantly modify or customize each other. Public relations services and application/website design and development are typically each considered one performance obligation as there is a significant integration of these services into a combined output.

We typically satisfy our performance obligations over time, as services are performed. Fees for services are typically recognized using input methods (direct labor hours, materials and third-party costs) that correspond with efforts incurred to date in relation to total estimated efforts to complete the contract. Point in time recognition primarily relates to certain commission-based contracts, which are recognized upon the placement of advertisements in various media when the Company has no further performance obligation.                                            

10

Revenue is recognized net of sales and other taxes due to be collected and remitted to governmental authorities. The Company’s contracts typically provide for termination by either party within 30 to 90 days. Although payment terms vary by client, they are typically within 30 to 60 days. In addition, the Company generally has the right to payment for all services provided through the end of the contract or termination date.

Within each contract, we identify whether the Company is principal or agent at the performance obligation level. In arrangements where the Company has substantive control over the service before transferring it to the client, and is primarily responsible for integrating the services into the final deliverables, we act as principal. In these arrangements, revenue is recorded at the gross amount billed. Accordingly, for these contracts the Company has included reimbursed expenses in revenue. In other arrangements where a third-party supplier, rather than the Company, is primarily responsible for the integration of services into the final deliverables, and thus the Company is solely arranging for the third-party supplier to provide these services to our client, we generally act as agent and record revenue equal to the net amount retained, when the fee or commission is earned. The role of MDC’s agencies under a production services agreement is to facilitate a client’s purchasing of production capabilities from a third-party production company in accordance with the client’s strategy and guidelines. The obligation of MDC’s agencies under media buying services is to negotiate and purchase advertising media from a third-party media vendor on behalf of a client to execute its media plan. We do not obtain control prior to transferring these services to our clients; therefore, we primarily act as agent for production and media buying services.                                    

A small portion of the Company’s contractual arrangements with clients include performance incentive provisions, which allow the Company to earn additional revenues as a result of its performance relative to both quantitative and qualitative goals. Incentive compensation is primarily estimated using the most likely amount method and is included in revenue up to the amount that is not expected to result in a reversal of a significant amount of cumulative revenue recognized. We recognize revenue related to performance incentives as we satisfy the performance obligation to which the performance incentives are related.

Disaggregated Revenue Data

The Company provides a broad range of services to a large base of clients across the full spectrum of industry verticals globally. The primary source of revenue is from agency arrangements in the form of fees for services performed, commissions, and from performance incentives or bonuses. Certain clients may engage with the Company in various geographic locations, across multiple disciplines, and through multiple Partner Firms. Representation of a client rarely means that MDC handles marketing communications for all brands or product lines of the client in every geographical location. The Company’s Partner Firms often cooperate with one another through referrals and the sharing of both services and expertise, which enables MDC to service clients’ varied marketing needs by crafting custom integrated solutions. Additionally, the Company maintains separate, independent operating companies to enable it to effectively manage potential conflicts of interest by representing competing clients across the MDC network.

The following table presents revenue disaggregated by client industry vertical for the three months ended March 31, 2021 and 2020:

		Three Months Ended March 31,
Industry	Reportable Segment	2021		2020
Food & Beverage	All	$	55,178	$	58,091
Retail	All	30,777		36,303
Consumer Products	All	45,405		39,769
Communications	All	16,990		41,045
Automotive	All	15,629		25,192
Technology	All	46,390		25,535
Healthcare	All	31,494		24,066
Financials	All	24,442		24,005
Transportation and Travel/Lodging	All	9,948		20,486
Other	All	31,332		33,250
		$	307,585	$	327,742

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MDC has historically largely focused where the Company was founded in North America, the largest market for its services in the world. The Company has expanded its global footprint to support clients looking for help to grow their businesses in new markets. MDC’s Partner Firms are located in the United States, Canada, and an additional eleven countries around the world. In the past, some clients have responded to weakening economic conditions with reductions to their marketing budgets, which included discretionary components that are easier to reduce in the short term than other operating expenses.

The following table presents revenue disaggregated by geography for the three months ended March 31, 2021 and 2020:

		Three Months Ended March 31,
Geographical Location	Reportable Segment	2021	2020
United States	All	$242,580	$264,561
Canada	All	22,650	18,256
Other	All	42,355	44,925
		$307,585	$327,742

Contract Assets and Liabilities

Contract assets consist of fees and reimbursable outside vendor costs incurred on behalf of clients when providing advertising, marketing and corporate communications services that have not yet been invoiced to clients. Unbilled service fees were $59,143 and $49,110 at March 31, 2021 and December 31, 2020, respectively, and are included as a component of Accounts receivable on the Unaudited Condensed Consolidated Balance Sheets. Outside vendor costs incurred on behalf of clients which have yet to be invoiced were $22,824 and $10,552 at March 31, 2021 and December 31, 2020, respectively, and are included on the Unaudited Condensed Consolidated Balance Sheets as Expenditures billable to clients. Such amounts are invoiced to clients at various times over the course of providing services.

Contract liabilities consist of fees billed to clients in excess of fees recognized as revenue and are classified as Advance billings and included within Accruals and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets. In arrangements in which we are acting as an agent, the revenue recognition related to the contract liability is presented on a net basis within the Unaudited Condensed Consolidated Statements of Operations. Advance billings at March 31, 2021 and December 31, 2020 were $170,159 and $152,956, respectively. The increase in the Advance billings balance of $17,203 for the three months ended March 31, 2021 was primarily driven by cash payments received or due in advance of satisfying our performance obligations, offset by $99,188 of revenues recognized that were included in the Advance billings balances as of December 31, 2020 and reductions due to the incurrence of third-party costs. Contract liabilities classified within Accruals and other liabilities at March 31, 2021 and December 31, 2020 were $97,075 and $112,755, respectively. The decrease in the balance of $15,680 for the three months ended March 31, 2021 was primarily driven by cash payments received or due in advance of satisfying our performance obligations, offset by $69,699 of revenues recognized that were included in the balance as of December 31, 2020 and reductions due to the incurrence of third-party costs.

Changes in the contract asset and liability balances during the three months ended March 31, 2021 were not materially impacted by write offs, impairment losses or any other factors.

The majority of our contracts are for periods of one year or less. For those contracts with a term of more than one year, we had approximately $5,799 of unsatisfied performance obligations as of March 31, 2021, of which we expect to recognize approximately 83% in 2021 and 17% in 2022.

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4. Income (Loss) Per Common Share

The following table sets forth the computation of basic and diluted income (loss) per common share:

	Three Months Ended March 31,
	2021		2020
Numerator:
Net income attributable to MDC Partners Inc.	$	5,010	$	1,002
Accretion on convertible preference shares	(3,724)		(3,440)
Net income allocated to convertible preference shares	(365)		—
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	921	$	(2,438)
Adjustment to net income allocated to convertible preference shares	7		—
Net income (loss) attributable to MDC Partners Inc. common shareholders - Diluted	$	928	$	(2,438)
Denominator:
Basic weighted average number of common shares outstanding	73,392,824		72,397,661
Diluted weighted average number of common shares outstanding	75,439,066		72,397,661
Basic	$	0.01	$	(0.03)
Diluted	$	0.01	$	(0.03)

Anti-dilutive stock awards 1,920,634     2,835,770

Restricted stock and restricted stock unit awards of 0 and 2,203,717 as of March 31, 2021 and 2020, respectively, are excluded from the computation of diluted income (loss) per common share because the performance contingency necessary for vesting has not been met as of the reporting date. In addition, there were 145,000 Preference Shares outstanding which were convertible into 29,430,693 and 27,189,411 Class A common shares at March 31, 2021 and 2020, respectively. These Preference Shares were anti-dilutive for each period presented in the table above and are therefore excluded from the diluted income (loss) per common share calculation.

5. Deferred Acquisition Consideration

Deferred acquisition consideration on the balance sheet consists of deferred obligations related to contingent and fixed purchase price payments, and to a lesser extent, contingent and fixed retention payments tied to continued employment of specific personnel. Contingent deferred acquisition consideration is recorded at the acquisition date fair value and adjusted at each reporting period through operating income, for contingent purchase price payments, or net interest expense, for fixed purchase price payments. The Company accounts for certain retention payments through operating income as stock-based compensation over the required retention period.

The following table presents changes in contingent deferred acquisition consideration, which is measured at fair value on a recurring basis using significant unobservable inputs, and a reconciliation to the amounts reported on the balance sheets as of March 31, 2021 and December 31, 2020.

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	March 31,		December 31,
	2021		2020
Beginning Balance of Contingent Payments	$	82,802	$	74,671
Payments	(1,153)		(46,792)
Redemption value adjustments (1)	12,392		44,993
Additions - Acquisitions and step-up transactions	—		7,703
Other	(641)		2,227
Ending balance of contingent payments	$	93,400	$	82,802
Fixed Payments	—		263
	$	93,400	$	83,065

(1) Redemption value adjustments are fair value changes from the Company’s initial estimates of deferred acquisition payments and stock-based compensation charges relating to acquisition payments that are tied to continued employment. Redemption value adjustments are recorded within Office and general expenses on the Unaudited Condensed Consolidated Statements of Operations.

The following table presents the impact to the Company’s Statements of operations due to the redemption value adjustments for the contingent deferred acquisition consideration:

	Three Months Ended March 31,
	2021		2020
Loss (income) attributable to fair value adjustments	$	11,685	$	(4,600)
Stock-based compensation	707		2,025
Redemption value adjustments	$	12,392	$	(2,575)

6. Leases

The Company leases office space in North America, Europe, Asia, South America, and Australia. This space is primarily used for office and administrative purposes by the Company’s employees in performing professional services. These leases are classified as operating leases and expire between years 2021 through 2033. The Company’s finance leases are immaterial.

The Company’s leasing policies are established in accordance with ASC 842, and accordingly, the Company recognizes on the balance sheet at the time of lease commencement a right-of-use lease asset and a lease liability, initially measured at the present value of the lease payments. Right-of-use lease assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. All right-of-use lease assets are reviewed for impairment. As the Company’s implicit rate in its leases is not readily determinable, in determining the present value of lease payments, the Company uses its incremental borrowing rate based on the information available at the commencement date. Lease payments included in the measurement of the lease liability are comprised of noncancelable lease payments, payments based upon an index or rate, payments for optional renewal periods where it is reasonably certain the renewal period will be exercised, and payments for early termination options unless it is reasonably certain the lease will not be terminated early.

Lease costs are recognized in the Unaudited Condensed Consolidated Statements of Operations over the lease term on a straight-line basis. Leasehold improvements are depreciated on a straight-line basis over the lesser of the term of the related lease or the estimated useful life of the asset. 

Some of the Company’s leases contain variable lease payments, including payments based upon an index or rate. Variable lease payments based upon an index or rate are initially measured using the index or rate in effect at the lease commencement date and are included within the lease liabilities. Lease liabilities are not remeasured as a result of changes in the index or rate, rather changes in these types of payments are recognized in the period in which the obligation for those payments is incurred. In addition, some of our leases contain variable payments for utilities, insurance, real estate tax, repairs and maintenance, and other variable operating expenses. Such amounts are not included in the measurement of the lease liability and are recognized in the period when the facts and circumstances which the variable lease payments are based upon occur.

Some of the Company’s leases include options to extend or renew the leases through 2040. The renewal and extension options are not included in the lease term as the Company is not reasonably certain that it will exercise its option.

From time to time, the Company enters into sublease arrangements both with unrelated third-parties and with our partner agencies. These leases are classified as operating leases and expire between years 2021 through 2027. Sublease income is

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recognized over the lease term on a straight-line basis. Currently, the Company subleases office space in North America, Asia, Europe and Australia.

As of March 31, 2021, the Company has entered into five operating leases for which the commencement date has not yet occurred as the premises are in the process of being prepared for occupancy by the landlord. Accordingly, these five leases represent an obligation of the Company that is not reflected within the Unaudited Condensed Consolidated Balance Sheets as of March 31, 2021. The aggregate future liability related to these leases is approximately $34,020.

The discount rate used for leases accounted for under ASC 842 is the Company’s collateralized credit adjusted borrowing rate.

The following table presents lease costs and other quantitative information for the three months ended March 31, 2021 and 2020:

	Three Months Ended March 31,
	2021		2020
Lease Cost:
Operating lease cost	$	17,127	$	16,391
Variable lease cost	2,593		4,655
Sublease rental income	(2,564)		(2,805)
Total lease cost	$	17,156	$	18,241
Additional information:
Cash paid for amounts included in the measurement of lease liabilities for operating leases
Operating cash flows	$	16,796	$	17,635
Right-of-use lease assets obtained in exchange for operating lease liabilities and other non-cash adjustments	$	3,816	$	7,119
Weighted average remaining lease term (in years) - Operating leases	7.2		7.0
Weighted average discount rate - Operating leases	10.6		8.7

In the three months ended March 31, 2021, the Company recorded a charge of $875 to reduce the carrying value of two of its right-of-use lease assets and accelerate the operating expenses of one of its right-of-use lease assets. These right-of-use lease assets related to three agencies within its Integrated Networks - Group B reportable segment. The Company evaluated the facts and circumstances related to the use of the assets which indicated that they may not be recoverable. Using adjusted quoted market prices to develop expected future cash flows, it was determined that the fair value of the assets were less than their carrying value. This impairment charge is included in Impairment and other losses within the Unaudited Condensed Consolidated Statements of Operations.

In the three months ended March 31, 2020, the Company recorded an impairment charge of $161 to reduce the carrying value of one of its right-of-use lease assets.

Operating lease expense is included in office and general expenses in the Unaudited Condensed Consolidated Statements of Operations. The Company’s lease expense for leases with a term of 12 months or less is immaterial.

The following table presents minimum future rental payments under the Company’s leases at March 31, 2021 and their reconciliation to the corresponding lease liabilities:

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	Maturity Analysis
Remaining 2021	$52,871
2022	61,447
2023	56,839
2024	50,615
2025	39,582
2026 and thereafter	152,702
Total	414,056
Less: Present value discount	(131,452)
Lease liability	$	282,604

7. Debt

As of March 31, 2021 and December 31, 2020, the Company’s indebtedness was comprised as follows:

	March 31, 2021		December 31, 2020
Revolving Credit Agreements	$	20,000	$	—
Senior Notes	870,256		870,256
Debt Issuance Cost	(25,406)		(27,072)
	$	864,850	$	843,184

Senior Notes

On March 23, 2016, MDC entered into an indenture (the “Indenture”) among MDC, its existing and future restricted subsidiaries that guarantee, are co-borrowers under, or grant liens to secure, the Credit Agreement (as defined below), as guarantors (the “Guarantors”) and The Bank of New York Mellon, as trustee, relating to the issuance by MDC of $900,000 aggregate principal amount of the senior notes due 2024 (the “Senior Notes”). The Senior Notes were sold in a private placement in reliance on exemptions from registration under the Securities Act of 1933. The Senior Notes bear interest, payable semiannually in arrears on May 1 and November 1, at a rate of 7.50% per annum. The Senior Notes mature on May 1, 2024, unless earlier redeemed or repurchased.

The Senior Notes are guaranteed on a senior unsecured basis by all of MDC’s existing and future restricted subsidiaries that guarantee, are co-borrowers under, or grant liens to secure, the Credit Agreement. The Senior Notes are unsecured and unsubordinated obligations of MDC and rank (i) equally in right of payment with all of MDC’s or any Guarantor’s existing and future senior indebtedness, (ii) senior in right of payment to MDC’s or any Guarantor’s existing and future subordinated indebtedness, (iii) effectively subordinated to all of MDC’s or any Guarantor’s existing and future secured indebtedness to the extent of the collateral securing such indebtedness, including the Credit Agreement, and (iv) structurally subordinated to all existing and future liabilities of MDC’s subsidiaries that are not Guarantors.

MDC may, at its option, redeem the Senior Notes in whole at any time or in part from time to time, at varying prices based on the timing of the redemption.

If MDC experiences certain kinds of changes of control (as defined in the Indenture), holders of the Senior Notes may require MDC to repurchase any Senior Notes held by them at a price equal to 101% of the principal amount of the Senior Notes plus accrued and unpaid interest. In addition, if MDC sells assets under certain circumstances, it must apply the proceeds from such sale and offer to repurchase the Senior Notes at a price equal to 100% of the principal amount plus accrued and unpaid interest.

The Indenture includes covenants that, among other things, restrict MDC’s ability and the ability of its restricted subsidiaries (as defined in the Indenture) to incur or guarantee additional indebtedness; pay dividends on or redeem or repurchase the capital stock of MDC; make certain types of investments; create restrictions on the payment of dividends or other amounts from MDC’s restricted subsidiaries; sell assets; enter into transactions with affiliates; create liens; enter into sale and leaseback transactions; and consolidate or merge with or into, or sell substantially all of MDC’s assets to, another person. These covenants are subject to a number of important limitations and exceptions. The Senior Notes are also subject to customary events of default, including a cross-payment default and cross-acceleration provision. The Company was in compliance with all covenants at March 31, 2021.

Revolving Credit Agreement

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The Company is party to a $211,500 secured revolving credit facility due February 3, 2022. The Company had $20,000 outstanding under the revolving credit facility as of March 31, 2021.

Advances under the Credit Agreement bear interest as follows: (i) Non-Prime Rate Loans bear interest at the Non-Prime Rate plus the Non-Prime Rate Margin and (ii) all other Obligations bear interest at the Prime Rate, plus the Prime Rate Margin. The Non-Prime Rate Margin and Prime Rate Margin will range from 2.50% to 3.00% for Non-Prime Rate Loans and from 1.75% to 2.25% for Prime Rate Loans. In addition to paying interest on outstanding principal under the Credit Agreement, MDC is required to pay an unused revolver fee to lenders under the Credit Agreement in respect of unused commitments thereunder.

The Credit Agreement, which includes financial and non-financial covenants, is guaranteed by substantially all of MDC’s present and future subsidiaries, other than immaterial subsidiaries and subject to customary exceptions, and collateralized by a portion of MDC’s outstanding receivable balance. The Company was in compliance with all of the terms and conditions of its Credit Agreement as of March 31, 2021.

At March 31, 2021 and December 31, 2020, the Company had issued undrawn outstanding letters of credit of $19,151 and $18,651, respectively.

8. Noncontrolling and Redeemable Noncontrolling Interests

When acquiring less than 100% ownership of an entity, the Company may enter into agreements that give the Company an option to purchase, or require the Company to purchase, the incremental ownership interests under certain circumstances. Where the option to purchase the incremental ownership is within the Company’s control, the amounts are recorded as noncontrolling interests in the equity section of the Company’s Unaudited Condensed Consolidated Balance Sheets. Where the incremental purchase may be required of the Company, the amounts are recorded as redeemable noncontrolling interests in mezzanine equity at their estimated acquisition date redemption value and adjusted at each reporting period for changes to their estimated redemption value through additional paid-in capital (but not less than their initial redemption value), except for foreign currency translation adjustments. On occasion, the Company may initiate a renegotiation to acquire an incremental ownership interest and the amount of consideration paid may differ materially from the amounts recorded in the Company’s Unaudited Condensed Consolidated Balance Sheets.

Noncontrolling Interests

Changes in amounts due to noncontrolling interest holders included in Accruals and other liabilities on the Unaudited Condensed Consolidated Balance Sheets for the year ended December 31, 2020 and three months ended March 31, 2021 were as follows:

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	Noncontrolling Interests
Balance at December 31, 2019	$	14,028
Income attributable to noncontrolling interests	21,774
Distributions made	(15,192)
Other	94
Balance at December 31, 2020	$	20,704
Income attributable to noncontrolling interests	4,491
Distributions made	(5,285)
Other	36
Balance at March 31, 2021	$	19,946

Changes in the Company’s ownership interests in our less than 100% owned subsidiaries during the three months ended March 31, 2021 and 2020 were as follows:

	Three Months Ended March 31,
	2021		2020
Net income attributable to MDC Partners Inc.	$	5,010	$	1,002
Transfers from the noncontrolling interest:
Decrease in MDC Partners Inc. paid-in capital for purchase of redeemable noncontrolling interests and noncontrolling interests	(330)		(503)
Net transfers from noncontrolling interests	$	(330)	$	(503)
Change from Net income attributable to MDC Partners Inc. and transfers to noncontrolling interests	$	4,680	$	499

Redeemable Noncontrolling Interests

The following table presents changes in redeemable noncontrolling interests:

	Three Months Ended March 31, 2021		Year Ended December 31, 2020
Beginning Balance	$	27,137	$	36,973
Redemptions	—		(12,289)
Granted	—		—
Changes in redemption value	(1,681)		2,800
Currency translation adjustments	(104)		(347)
Ending Balance	$	25,352	$	27,137

The noncontrolling shareholders’ ability to exercise any such option right is subject to the satisfaction of certain conditions, including conditions requiring notice in advance of exercise and specific employment termination conditions. In addition, these rights cannot be exercised prior to specified staggered exercise dates. The exercise of these rights at their earliest contractual date would result in obligations of the Company to fund the related amounts during 2021 to 2025. It is not determinable, at this time, if or when the owners of these rights will exercise all or a portion of these rights.

The redeemable noncontrolling interest of $25,352 as of March 31, 2021, consists of $16,469 assuming that the subsidiaries perform over the relevant future periods at their discounted cash flows earnings level and such rights are exercised, $8,883 upon termination of such owner’s employment with the applicable subsidiary or death and $0 representing the initial redemption value (required floor) recorded for certain acquisitions in excess of the amount the Company would have to pay should the Company acquire the remaining ownership interests for such subsidiaries.

These adjustments will not impact the calculation of earnings (loss) per share if the redemption values are less than the estimated fair values. There is no related impact on the Company’s income per share calculations.

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9. Commitments, Contingencies, and Guarantees

Legal Proceedings. The Company’s operating entities are involved in legal proceedings of various types. While any litigation contains an element of uncertainty, the Company has no reason to believe that the outcome of such proceedings or claims will have a material adverse effect on the financial condition or results of operations of the Company.

Deferred Acquisition Consideration and Options to Purchase. See Notes 5 and 8 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for information regarding potential payments associated with deferred acquisition consideration and the acquisition of noncontrolling shareholders’ ownership interest in subsidiaries.

Natural Disasters. Certain of the Company’s operations are located in regions of the United States which typically are subject to hurricanes. During the three months ended March 31, 2021 and 2020, these operations did not incur any material costs related to damages resulting from hurricanes.

Guarantees. Generally, the Company has indemnified the purchasers of certain assets in the event that a third party asserts a claim against the purchaser that relates to a liability retained by the Company. These types of indemnification guarantees typically extend for a number of years. Historically, the Company has not made any significant indemnification payments under such agreements and no amount has been accrued in the accompanying consolidated financial statements with respect to these indemnification guarantees. The Company continues to monitor the conditions that are subject to guarantees and indemnifications to identify whether it is probable that a loss has occurred and would recognize any such losses under any guarantees or indemnifications in the period when those losses are probable and estimable.

Commitments.  At March 31, 2021, the Company had $19,151 of undrawn letters of credit.

The Company entered into operating leases for which the commencement date has not yet occurred as of March 31, 2021. See Note 6 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for additional information.

10. Share Capital

The authorized and outstanding share capital of the Company is as follows:

Series 6 Convertible Preference Shares

On March 14, 2019 (the “Series 6 Issue Date”), the Company entered into a securities purchase agreement with Stagwell Agency Holdings LLC (“Stagwell Holdings”), an affiliate of Stagwell, pursuant to which Stagwell Holdings agreed to purchase (i) 14,285,714 newly authorized Class A shares (the “Stagwell Class A Shares”) for an aggregate contractual purchase price of $50,000 and (ii) 50,000 newly authorized Series 6 convertible preference shares (“Series 6 Preference Shares”) for an aggregate contractual purchase price of $50,000. The Company received proceeds of approximately $98,620 net of fees and estimated expenses, which were primarily used to pay down existing debt under the Company’s credit facility and for general corporate purposes. The proceeds allocated to the Stagwell Class A Shares were $35,997 and to Series 6 Preference Shares were $62,623 based on their relative fair value calculated by utilizing a Monte Carlo Simulation model. In connection with the closing of the transaction, the Company increased the size of its Board and appointed two nominees designated by Stagwell Holdings. Except as required by law, the Series 6 Preference Shares do not have voting rights and are not redeemable at the option of Stagwell Holdings.

The holders of the Series 6 Preference Shares have the right to convert their Series 6 Preference Shares in whole at any time and from time to time, and in part at any time and from time to time, into a number of Class A Shares equal to the then-applicable liquidation preference divided by the applicable conversion price at such time (the “Conversion Price”). The initial liquidation preference per share of each Series 6 Preference Share is $1,000. The initial Conversion Price is $5.00 per Series 6 Preference Share, subject to customary adjustments for share splits and combinations, dividends, recapitalizations and other matters, including weighted average anti-dilution protection for certain issuances of equity or equity-linked securities.

The Series 6 Preference Shares’ liquidation preference accretes at 8.0% per annum, compounded quarterly until the five-year anniversary of the Series 6 Issue Date. During the three months ended March 31, 2021, the Series 6 Preference Shares accreted at a monthly rate of 7.69, for total accretion of $1,153, bringing the aggregate liquidation preference to $58,804 as of March 31, 2021. The accretion is considered in the calculation of net income (loss) attributable to MDC Partners Inc. common shareholders. See Note 4 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for further information regarding the Series 6 Preference Shares.

Holders of the Series 6 Preference Shares are entitled to dividends in an amount equal to any dividends that would otherwise have been payable on the Class A Shares issued upon conversion of the Series 6 Preference Shares. The Series 6 Preference Shares are convertible at the Company’s option (i) on and after the two-year anniversary of the Series 6 Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least 125% of the Conversion

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Price or (ii) after the fifth anniversary of the Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least equal to the Conversion Price.

Following certain change in control transactions of the Company in which holders of Series 6 Preference Shares are not entitled to receive cash or qualifying listed securities with a value at least equal to the liquidation preference plus accrued and unpaid dividends, (i) holders will be entitled to cash dividends on the liquidation preference at an increasing rate (beginning at 7%), and (ii) the Company will have a right to redeem the Series 6 Preference Shares for cash at the greater of their liquidation preference plus accrued and unpaid dividends or their as-converted value.

Series 4 Convertible Preference Shares

On March 7, 2017 (the “Series 4 Issue Date”), the Company issued 95,000 newly created Preference Shares (“Series 4 Preference Shares”) to affiliates of The Goldman Sachs Group, Inc. (collectively, the “Purchaser”) pursuant to a $95,000 private placement. The Company received proceeds of approximately $90,123, net of fees and estimated expenses, which were primarily used to pay down existing debt under the Company’s credit facility and for general corporate purposes. In connection with the closing of the transaction, the Company increased the size of its Board and appointed one nominee designated by the Purchaser. Except as required by law, the Series 4 Preference Shares do not have voting rights and are not redeemable at the option of the Purchaser.

Subsequent to the ninetieth day following the Series 4 Issue Date, the holders of the Series 4 Preference Shares have the right to convert their Series 4 Preference Shares in whole at any time and from time to time and in part at any time and from time to time into a number of Class A Shares equal to the then-applicable liquidation preference divided by the applicable conversion price at such time (the “Conversion Price”). The initial liquidation preference per share of each Series 4 Preference Share is $1,000. The Conversion Price of a Series 4 Preference Share is subject to customary adjustments for share splits and combinations, dividends, recapitalizations and other matters, including weighted average anti-dilution protection for certain issuances of equity or equity-linked securities. In connection with the anti-dilution protection provision triggered by the issuance of equity securities to Stagwell Holdings, the Conversion Price per Series 4 Preference Share was reduced to $7.42 from the initial Conversion Price of $10.00.

The Series 4 Preference Shares’ liquidation preference accretes at 8.0% per annum, compounded quarterly until the five-year anniversary of the Series 4 Issue Date. During the three months ended March 31, 2021, the Series 4 Preference Shares accreted at a monthly rate of approximately $9.02 per Series 4 Preference Share, for total accretion of $2,571, bringing the aggregate liquidation preference to $131,110 as of March 31, 2021. The accretion is considered in the calculation of net income (loss) attributable to MDC Partners Inc. common shareholders. See Note 4 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for further information regarding the Series 4 Preference Shares.

Holders of the Series 4 Preference Shares are entitled to dividends in an amount equal to any dividends that would otherwise have been payable on the Class A Shares issued upon conversion of the Series 4 Preference Shares. The Series 4 Preference Shares are convertible at the Company’s option (i) on and after the two-year anniversary of the Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least 125% of the Conversion Price or (ii) after the fifth anniversary of the Series 4 Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least equal to the Conversion Price.

Following certain change in control transactions of the Company in which holders of Series 4 Preference Shares are not entitled to receive cash or qualifying listed securities with a value at least equal to the liquidation preference plus accrued and unpaid dividends, (i) holders will be entitled to cash dividends on the liquidation preference at an increasing rate (beginning at 7%), and (ii) the Company will have a right to redeem the Series 4 Preference Shares for cash at the greater of their liquidation preference plus accrued and unpaid dividends or their as-converted value.

Class A Common Shares (“Class A Shares”)

These are an unlimited number of subordinate voting shares, carrying one vote each, with a par value of $0, entitled to dividends equal to or greater than Class B Shares, convertible at the option of the holder into one Class B Share for each Class A Share after the occurrence of certain events related to an offer to purchase all Class B shares. There were 74,787,317 and 73,529,105 Class A Shares issued and outstanding as of March 31, 2021 and December 31, 2020, respectively.

Class B Common Shares (“Class B Shares”)

These are an unlimited number of voting shares, carrying twenty votes each, with a par value of $0, convertible at any time at the option of the holder into one Class A share for each Class B share. There were 3,743 and 3,743 Class B Shares issued and outstanding as of March 31, 2021 and December 31, 2020, respectively.

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11. Fair Value Measurements

A fair value measurement assumes a transaction to sell an asset or transfer a liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability.

In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as considers counterparty credit risk in its assessment of fair value. The hierarchy for observable and unobservable inputs used to measure fair value into three broad levels are described below: 

•Level 1 - Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.

•Level 2 - Observable prices that are based on inputs not quoted on active markets, but corroborated by market data.

•Level 3 - Unobservable inputs are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs.

Financial Liabilities that are not Measured at Fair Value on a Recurring Basis

The following table presents certain information for our financial liability that is not measured at fair value on a recurring basis at March 31, 2021 and December 31, 2020:

	March 31, 2021				December 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Liabilities:
Senior Notes	$	870,256	$	882,379	$	870,256	$	883,580

Our long-term debt includes fixed rate debt. The fair value of this instrument is based on quoted market prices in markets that are not active. Therefore, this debt is classified as Level 2 within the fair value hierarchy.

Financial Liabilities Measured at Fair Value on a Recurring Basis

Contingent deferred acquisition consideration (Level 3 fair value measurement) is recorded at the acquisition date fair value and adjusted at each reporting period. The estimated liability is determined in accordance with various contractual valuation formulas and is dependent upon significant assumptions, such as the growth rate of the earnings of the relevant subsidiary during the contractual period and the discount rate. These growth rates are consistent with the Company’s long-term forecasts. As of March 31, 2021, the discount rate used to measure these liabilities was 5.1%.

As these estimates require the use of assumptions about future performance, which are uncertain at the time of estimation, the fair value measurements presented on the Unaudited Condensed Consolidated Balance Sheets are subject to material uncertainty.

See Note 5 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for additional information regarding contingent deferred acquisition consideration.

At March 31, 2021 and December 31, 2020, the carrying amount of the Company’s financial instruments, including cash and cash equivalents, accounts receivable and accounts payable, approximated fair value because of their short-term maturity.

Non-financial Assets and Liabilities that are Measured at Fair Value on a Nonrecurring Basis

Certain non-financial assets are measured at fair value on a nonrecurring basis, primarily goodwill, intangible assets (Level 3 fair value measurement) and right-of-use lease assets (Level 2 fair value measurement). Accordingly, these assets are not measured and adjusted to fair value on an ongoing basis but are subject to periodic evaluations for potential impairment. The Company did not recognize an impairment of goodwill or intangible assets in the three months ended March 31, 2021. The company did not recognize an impairment of goodwill or intangible assets in the three months ended March 31, 2020.

The Company recognized a charge of $598 to reduce the carrying value of its right-of-use lease assets in the three months ended March 31, 2021. The company recognized an impairment charge of $161 to reduce the carrying value of one of its right-of-use lease assets in the three months ended March 31, 2020. See Note 6 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for further information.

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12. Supplemental Information

Impairment and Other Losses

The Company recognized a charge of $875 for the three months ended March 31, 2021 to reduce the carrying value of two of its right-of-use lease assets and accelerate the operating expenses of one of its right-of-use lease assets. These right-of-use lease assets related to three agencies within its Integrated Networks - Group B reportable segment.

See Note 6 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for additional information regarding the impairment of right-of-use lease assets and losses.

Income Taxes

Our tax provision for interim periods is determined using an estimated annual effective tax rate, adjusted for discrete items arising in interim periods.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. The CARES Act includes provisions relating to delaying certain payroll tax payments, refundable payroll tax credits, net operating loss carryback periods, modifications to the net interest deduction limitations and technical corrections to the tax depreciation methods for qualified improvement property. The tax law changes in the CARES Act did not have a material impact on the Company’s income tax provision.

The Company had an income tax expense for the three months ended March 31, 2021 of $1,302 (on a pre-tax income of $11,296 resulting in an effective tax rate of 11.5%) compared to income tax expense of $13,500 (on pre-tax income of $15,293 resulting in an effective tax rate of 88.3%) for the three months ended March 31, 2020.

         The effective tax rate of 11.5% for the three months ended March 31, 2021 was primarily due to minimal tax expense recognized on U.S. earnings as a result of being subject to a valuation allowance.

The effective tax rate of 88.3% for the three months ended March 31, 2020 was primarily driven by capital gains, non-deductible stock compensation for which a tax benefit was not recognized, and the jurisdictional mix of earnings.    

13. Related Party Transactions

In the ordinary course of business, the Company enters into transactions with related parties, including Stagwell and its affiliates. The transactions may range in the nature and value of services underlying the arrangements. Below are the related party transactions that are significant in nature:

In October 2019, a Partner Firm of the Company entered into an arrangement with a Stagwell affiliate, in which the Stagwell affiliate and the Partner Firm collaborated to provide various services to a client of the Partner Firm. The Partner Firm and the Stagwell affiliate pitched and won this business together, with the client ultimately determining the general scope of work for each agency. Under the arrangement, which was structured as a sub-contract due to client preference, the Partner Firm is expected to pay the Stagwell affiliate, for services provided by the Stagwell affiliate in connection with serving the client, approximately $2,000 which has been fully recognized through March 31, 2021. As of March 31, 2021, $101 was owed to the affiliate.

In January 2021, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform media planning, buying and reporting services. Under the arrangement, the Partner Firm is expected to receive from the Stagwell affiliate approximately $529, which have been fully recognized through March 2021. As of March 31, 2021, $0 was due from the affiliate. 

In May 2020, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform programmatic media planning, buying and reporting services. Under the arrangement, the Partner Firm is expected to receive from the Stagwell affiliate approximately $2,397, which is expected to be fully recognized in May 2021. As of March 31, 2021, $0 was due from the affiliate. 

In November 2020, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform Event Management Services. Under the arrangement, the Partner Firm is expected to receive from the Stagwell affiliate approximately $456, which has been fully recognized as of March of 2021. As of March 31, 2021, $316 was due from the affiliate.

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In February 2021, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform requirements gathering and concept features for a future-leaning ad platform for the augmented reality space. Under the arrangement, the Stagwell affiliate is expected to receive from the Partner Firm approximately $140, which will be recognized through April 2021. As of March 31, 2021, $140 was due to the affiliate.

In March 2021, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform media relations support and outreach services. Under the arrangement, the Partner Firm is expected to receive from the Stagwell affiliate approximately $190, which will be recognized through September 2022. As of March 31, 2021, $10 was due from the affiliate.

The Company entered into an agreement commencing on January 1, 2020 to sublease office space through July 2021 to a company whose chairman is a member of the Company’s Board of Directors. As of March 31, 2021, the total future rental income related to the sublease is approximately $65.

14. Segment Information

The Company determines an operating segment if a component (i) engages in business activities from which it earns revenues and incurs expenses, (ii) has discrete financial information, and is (iii) regularly reviewed by the Chief Operating Decision Maker (“CODM”), who is Mark Penn, Chief Executive Officer and Chairman, to make decisions regarding resource allocation for the segment and assess its performance. Once operating segments are identified, the Company performs an analysis to determine if aggregation of operating segments is applicable. This determination is based upon a quantitative analysis of the expected and historic average long-term profitability for each operating segment, together with a qualitative assessment to determine if operating segments have similar operating characteristics.

The CODM uses Adjusted EBITDA (defined below) as a key metric, to evaluate the operating and financial performance of a segment, identify trends affecting the segments, develop projections and make strategic business decisions. Adjusted EBITDA is defined as Net income (loss) attributable to MDC Partners Inc. common shareholders’ plus or minus non-operating items to operating income (loss), plus depreciation and amortization, stock-based compensation, deferred acquisition consideration adjustments, distributions from non-consolidated affiliates and other items, net. Distributions from non-consolidated affiliates includes (i) cash received for profit distributions from non-consolidated affiliates, and (ii) consideration from the sale of ownership interests in non-consolidated affiliates, less contributions to date, plus undistributed earnings (losses). Other items, net includes items such as merger related costs, severance and other restructuring expenses, including costs for leases that will either be terminated or sublet in connection with the centralization of our New York real estate portfolio.

The three reportable segments that result from applying the aggregation criteria are as follows: “Integrated Networks - Group A,” “Integrated Networks - Group B” and the “Media & Data Network.” In addition, the Company combines and discloses operating segments that do not meet the aggregation criteria as “All Other.” The Company also reports corporate expenses, as further detailed below, as “Corporate.” All segments follow the same basis of presentation and accounting policies as those described throughout the Notes to the Unaudited Condensed Consolidated Financial Statements included herein and Note 2 of the Company’s 2020 Form 10-K.

•The Integrated Networks - Group A reportable segment is comprised of the Anomaly Alliance (Anomaly, Concentric Partners, Hunter, Mono, Y Media Labs) and Colle McVoy operating segments.

•The Integrated Networks - Group B reportable segment is comprised of the Constellation (72andSunny, CPB, Instrument and Redscout) and Doner Partner Network (6degrees, Doner, KWT, Union, Veritas and Yamamoto) operating segments.

    The operating segments aggregated within the Integrated Networks - Group A and B reportable segments provide a range of services for their clients, primarily including strategy, creative and production for advertising campaigns across a variety of platforms (print, digital, social media, television broadcast) as well as public relations and communications services, experiential, social media and influencer marketing. These operating segments share similar characteristics related to (i) the nature of their services; (ii) the type of clients and the methods used to provide services; and (iii) the extent to which they may be impacted by global economic and geopolitical risks. In addition, these operating segments compete with each other for new business and from time to time have business move between them. While the operating segments are similar in nature, the distinction between the Integrated Networks - Group A and B is the aggregation of operating segments that have the most similar historical and expected average long-term profitability.

•The Media & Data Network reportable segment is comprised of a single operating segment that combines media buying and planning across a range of platforms (out-of-home, paid search, social media, lead generation,

23

programmatic, television broadcast) with technology and data capabilities. The Media & Data Network includes Gale Partners, Kenna, MDC Media and Northstar.

•All Other consists of the Company’s remaining operating segments that provide a range of services including advertising, public relations and marketing communication services, but generally do not have similar services offerings or financial characteristics as those aggregated in the reportable segments. The All Other category includes Allison & Partners, Bruce Mau, Forsman & Bodenfors, Hello, Team and Vitro.

•Corporate consists of corporate office expenses incurred in connection with the strategic resources provided to the operating segments, as well as certain other centrally managed expenses that are not fully allocated to the operating segments. These office and general expenses include (i) salaries and related expenses for corporate office employees, including employees dedicated to supporting the operating segments, (ii) occupancy expenses relating to properties occupied by all corporate office employees, (iii) other office and general expenses including professional fees for the financial statement audits and other public company costs, and (iv) certain other professional fees managed by the corporate office. Additional expenses managed by the corporate office that are directly related to the operating segments are allocated to the appropriate reportable segment and the All Other category.

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	Three Months Ended March 31,
	2021		2020
Revenue:	(Dollars in Thousands)
Integrated Networks - Group A	$	102,386	$	90,621
Integrated Networks - Group B	111,151		117,707
Media & Data Network	36,783		41,058
All Other	57,265		78,356
Total	$	307,585	$	327,742
Adjusted EBITDA:
Integrated Networks - Group A	$	22,462	$	16,301
Integrated Networks - Group B	25,869		17,136
Media & Data Network	5,081		1,787
All Other	6,042		9,904
Corporate	(7,520)		(5,562)
Total Adjusted EBITDA	$	51,934	$	39,566
Depreciation and amortization	$	(8,176)	$	(9,206)
Impairment and other losses	(875)		(161)
Stock-based compensation	1,963		(3,070)
Deferred acquisition consideration	(11,685)		4,600
Distributions from non-consolidated affiliates	(9)		14
Other items, net	(5,485)		(2,416)
Total Operating Income	$	27,667	$	29,327
Other Income (expenses):
Interest expense and finance charges, net	$	(19,065)	$	(15,611)
Foreign exchange gain (loss)	2,080		(14,757)
Other, net	614		16,334
Income before income taxes and equity in earnings of non-consolidated affiliates	11,296		15,293
Income tax expense	1,302		13,500
Income before equity in earnings of non-consolidated affiliates	9,994		1,793
Equity in losses of non-consolidated affiliates	(493)		—
Net income	9,501		1,793
Net income attributable to the noncontrolling interest	(4,491)		(791)
Net income attributable to MDC Partners Inc.	5,010		1,002
Accretion on and net income allocated to convertible preference shares	(4,089)		(3,440)
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	921	$	(2,438)

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	Three Months Ended March 31,
	2021		2020
Depreciation and amortization:	(Dollars in Thousands)
Integrated Networks - Group A	$	1,294	$	1,741
Integrated Networks - Group B	3,657		4,526
Media & Data Network	472		808
All Other	1,537		1,899
Corporate	1,216		232
Total	$	8,176	$	9,206
Stock-based compensation:
Integrated Networks - Group A	$	(3,628)	$	1,961
Integrated Networks - Group B	953		900
Media & Data Network	21		(13)
All Other	61		80
Corporate	630		142
Total	$	(1,963)	$	3,070
Capital expenditures:
Integrated Networks - Group A	$	275	$	358
Integrated Networks - Group B	213		477
Media & Data Network	64		85
All Other	134		324
Corporate	(170)		302
Total	$	516	$	1,546

The Company’s CODM does not use segment assets to allocate resources or to assess performance of the segments and therefore, total segment assets have not been disclosed.

See Note 3 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for a summary of the Company’s revenue by geographic region for the three months ended March 31, 2021 and 2020.

Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations

Unless otherwise indicated, references to the “Company” or “MDC” mean MDC Partners Inc. and its subsidiaries, and references to a “fiscal year” mean the Company’s year commencing on January 1 of that year and ending December 31 of that year (e.g., fiscal 2021 means the period beginning January 1, 2021, and ending December 31, 2021).

The Company reports its financial results in accordance with accounting principles generally accepted in the United States of America (“GAAP”). In addition, the Company has included non-GAAP financial measures and ratios, which management uses to operate the business, which it believes provide useful supplemental information to both management and readers of this report in making period-to-period comparisons in measuring the financial performance and financial condition of the Company. These measures do not have a standardized meaning prescribed by GAAP and should not be construed as an alternative to other titled measures determined in accordance with GAAP. The non-GAAP measures included are “organic revenue growth” or “organic revenue decline” and “Adjusted EBITDA.”

Organic revenue growth or organic revenue decline refer to the positive or negative results, respectively, of subtracting both the foreign exchange and acquisition (disposition) components from total revenue growth. The acquisition (disposition) component is calculated by aggregating the prior period revenue for any acquired businesses, less the prior period revenue of any businesses that were disposed of in the current period. The organic revenue growth (decline) component reflects the constant currency impact (a) of the change in revenue of the Partner Firms which the Company has held throughout each of the comparable periods presented and (b) “non-GAAP acquisitions (dispositions), net.” Non-GAAP acquisitions (dispositions), net consists of (i) for acquisitions during the current year, the revenue effect from such acquisition as if the acquisition had been owned during the equivalent period in the prior year and (ii) for acquisitions during the previous year, the revenue effect from such acquisitions as if they had been owned during that entire year or same period as the current reportable period, taking into

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account their respective pre-acquisition revenues for the applicable periods and (iii) for dispositions, the revenue effect from such dispositions as if they had been disposed of during the equivalent period in the prior year. The Company believes that isolating the impact of acquisition activity and foreign currency impacts is an important and informative component to understand the overall change in the Company’s consolidated revenue. The change in the consolidated revenue that remains after these adjustments illustrates the underlying financial performance of the Company’s businesses. Specifically, it represents the impact of the Company’s management oversight, investments and resources dedicated to supporting the businesses’ growth strategy and operations. In addition, it reflects the network benefit of inclusion in the broader portfolio of firms that includes, but is not limited to, cross-selling and sharing of best practices. This approach isolates changes in performance of the business that take place under the Company’s stewardship, whether favorable or unfavorable, and thereby reflects the potential benefits and risks associated with owning and managing a talent-driven services business.

Accordingly, during the first twelve months of ownership by the Company, the organic growth measure may credit the Company with growth from an acquired business that is dependent on work performed prior to the acquisition date, and may include the impact of prior work in progress, existing contracts and backlog of the acquired businesses. It is the presumption of the Company that positive developments that may have taken place at an acquired business during the period preceding the acquisition will continue to result in value creation in the post-acquisition period.

While the Company believes that the methodology used in the calculation of organic revenue change is entirely consistent with our closest U.S. competitors, the calculations may not be comparable to similarly titled measures presented by other publicly traded companies in other industries. Additional information regarding the Company’s acquisition activity as it relates to potential revenue growth is provided in this Item 2 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” under “Certain Factors Affecting our Business.”

Adjusted EBITDA is defined as Net income (loss) attributable to MDC Partners Inc. common shareholders plus or minus non-operating items to operating income (loss) plus depreciation and amortization, stock-based compensation, deferred acquisition consideration adjustments, distributions from non-consolidated affiliates, and other items, net. Distributions from non-consolidated affiliates includes (i) cash received for profit distributions from non-consolidated affiliates, and (ii) consideration from the sale of ownership interests in non-consolidated affiliates less contributions to date plus undistributed earnings (losses). Other items includes items such as merger related costs, severance and restructuring expenses, including costs for leases that will either be terminated or sublet in connection with the centralization of our New York real estate portfolio.

The following discussion focuses on the operating performance of the Company for the three months ended March 31, 2021 and 2020 and the financial condition of the Company as of March 31, 2021. This analysis should be read in conjunction with the interim Unaudited Condensed Consolidated Financial Statements presented in this interim report and the annual Audited Consolidated Financial Statements and Management’s Discussion and Analysis presented in the 2020 Form 10-K.

Direct costs represent billable or non-billable internal and third-party expenses that are directly tied to providing services to our clients where we are principal in the arrangement. Direct costs exclude staff costs, which are presented separately.

All amounts are in dollars unless otherwise stated. Amounts reported in millions herein are computed based on the amounts in thousands. As a result, the sum of the components, and related calculations, reported in millions may not equal the total amounts due to rounding.

The percentage changes included in the tables herein Item 2 that are not considered meaningful are presented as “NM.”

Recent Developments

On December 21, 2020, MDC and Stagwell Media LP (“Stagwell”) announced that they had entered into a definitive transaction agreement (the “Transaction Agreement”) providing for the combination of MDC with the subsidiaries of Stagwell that own and operate a portfolio of marketing services companies (the “Stagwell Entities”). The combination and related transactions, including the domestication of MDC to a Delaware corporation, are referred to as the “Transactions.” See “Item 1. Business – Recent Developments” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, filed on March 16, 2021, for a description of the Transactions.

On May 7, 2021, MDC’s proxy statement/prospectus on Form S-4, as filed on April 30, 2021, which describes the Transaction Agreement, the Transactions, and related ancillary agreements in more detail, was declared effective by the SEC. MDC’s Board of Directors has scheduled a special meeting of shareholders on June 22, 2021 for the Company’s shareholders to vote on proposals to approve the Transactions and related matters.

On April 26, 2021, the Company acquired the remaining 40% ownership interest of Gale Partners it did not already own for an aggregate purchase price of approximately $20,000. The purchase price will be made in a combination of cash and MDC Class A Common Shares, of which approximately $12,000 is deferred with payments due in April 2022 and 2023. As part of the closing date purchase price, the Company issued 2,131,574 Class A Common Shares to the seller in a private placement in reliance on exemptions from registration under the Securities Act of 1933, as amended.

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Executive Summary

The COVID-19 pandemic continues to negatively affect the global economy and the Company’s operations. The pandemic did not begin to impact the Company’s operations in a significant manner until the second quarter of 2020. Therefore, our first quarter of 2021 comparisons to the first quarter of 2020 are affected by the impact of the pandemic on our operations in the first quarter of 2021. Early in 2020, the Company took actions to combat the impact of COVID-19 on our operations. We will continue to monitor the worldwide public health threat, government actions to combat COVID-19 and the impact such developments may have on the overall economy, our clients and operations. If the impact of the pandemic is beyond our expectation, the Company believes it is well positioned through the actions implemented at the beginning of the pandemic to successfully work through the effects of COVID-19 in 2021.

MDC conducts its business through its network of Partner Firms, which provide marketing and business solutions that realize the potential of combining data and creativity. MDC’s strategy is to build, grow and acquire market-leading businesses that deliver the modern suite of services that marketers need to thrive in a rapidly evolving business environment. MDC’s differentiation lies in its best-in-class creative roots and proven entrepreneurial leaders, which together with innovations in technology and data, bring transformational marketing, activation, communications and strategic consulting services to clients. MDC leverages its range of services in an integrated manner, offering strategic, creative and innovative solutions that are technologically forward and media-agnostic. The Company’s work is designed to challenge the industry status quo, realize outsized returns on investment, and drive transformative growth and business performance for its clients and stakeholders.

MDC manages its business by monitoring several financial and non-financial performance indicators. The key indicators that we focus on are revenues, operating expenses, capital expenditures and non-GAAP measures described above. Revenue growth is analyzed by reviewing a mix of measurements, including (i) growth by major geographic location, (ii) growth by client industry vertical, (iii) growth from existing clients and the addition of new clients, (iv) growth by primary discipline, (v) growth from currency changes, and (vi) growth from acquisitions. In addition to monitoring the foregoing financial indicators, the Company assesses and monitors several non-financial performance indicators relating to the business performance of our Partner Firms. These indicators may include a Partner Firm’s recent new client win/loss record; the depth and scope of a pipeline of potential new client account activity; the overall quality of the services provided to clients; and the relative strength of the Partner Firm’s next generation team that is in place as part of a potential succession plan to succeed the current senior executive team.

The Company determines an operating segment if a component (i) engages in business activities from which it earns revenues and incurs expenses, (ii) has discrete financial information, and is (iii) regularly reviewed by the Chief Operating Decision Maker (“CODM”), who is Mark Penn, Chief Executive Officer and Chairman, to make decisions regarding resource allocation for the segment and assess its performance. Once operating segments are identified, the Company performs an analysis to determine if aggregation of operating segments is applicable. This determination is based upon a quantitative analysis of the expected and historic average long-term profitability for each operating segment, together with a qualitative assessment to determine if operating segments have similar operating characteristics.

The CODM uses Adjusted EBITDA (defined below) as a key metric, to evaluate the operating and financial performance of a segment, identify trends affecting the segments, develop projections and make strategic business decisions. Adjusted EBITDA is defined as Net income (loss) attributable to MDC Partners Inc. common shareholders’ plus or minus non-operating items to operating income (loss), plus depreciation and amortization, stock-based compensation, deferred acquisition consideration adjustments, distributions from non-consolidated affiliates and other items, net. Distributions from non-consolidated affiliates includes (i) cash received for profit distributions from non-consolidated affiliates, and (ii) consideration from the sale of ownership interests in non-consolidated affiliates, less contributions to date, plus undistributed earnings (losses). Other items, net includes items such as merger related costs, severance and other restructuring expenses, including costs for leases that will either be terminated or sublet in connection with the centralization of our New York real estate portfolio.

The three reportable segments that result from applying the aggregation criteria are as follows: “Integrated Networks - Group A,” “Integrated Networks - Group B” and the “Media & Data Network.” In addition, the Company combines and discloses operating segments that do not meet the aggregation criteria as “All Other.” The Company also reports corporate expenses, as further detailed below, as “Corporate.” All segments follow the same basis of presentation and accounting policies as those described throughout the Notes to the Unaudited Condensed Consolidated Financial Statements included herein and Note 2 of the Company’s 2020 Form 10-K.

In addition, MDC reports its corporate office expenses incurred in connection with the strategic resources provided to the Partner Firms, as well as certain other centrally managed expenses that are not fully allocated to the operating segments as Corporate, including interest expense and public company overhead costs. Corporate provides client and business development

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support to the Partner Firms as well as certain strategic resources, including accounting, administrative, financial, real estate, human resource and legal functions.

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Results of Operations:

	Three Months Ended March 31,
	2021		2020
Revenue:	(Dollars in Thousands)
Integrated Networks - Group A	$	102,386	$	90,621
Integrated Networks - Group B	111,151		117,707
Media & Data Network	36,783		41,058
All Other	57,265		78,356
Total Revenue	$	307,585	$	327,742
Operating Income (Loss):
Integrated Networks - Group A	$	11,450	$	12,030
Integrated Networks - Group B	19,910		17,161
Media & Data Network	3,392		617
All Other	4,657		7,857
Corporate	(11,742)		(8,338)
Total Operating Income	$	27,667	$	29,327
Other Income (Expenses):
Interest expense and finance charges, net	$	(19,065)	$	(15,611)
Foreign exchange gain (loss)	2,080		(14,757)
Other, net	614		16,334
Income before income taxes and equity in earnings of non-consolidated affiliates	11,296		15,293
Income tax expense	1,302		13,500
Income before equity in earnings of non-consolidated affiliates	9,994		1,793
Equity in losses of non-consolidated affiliates	(493)		—
Net income	9,501		1,793
Net income attributable to the noncontrolling interest	(4,491)		(791)
Net income attributable to MDC Partners Inc.	5,010		1,002
Accretion on and net income allocated to convertible preference shares	(4,089)		(3,440)
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	921	$	(2,438)
Adjusted EBITDA:
Integrated Networks - Group A	$	22,462	$	16,301
Integrated Networks - Group B	25,869		17,136
Media & Data Network	5,081		1,787
All Other	6,042		9,904
Corporate	(7,520)		(5,562)
Total Adjusted EBITDA	$	51,934	$	39,566

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	Three Months Ended March 31,
	2021		2020
Capital expenditures:	(Dollars in Thousands)
Integrated Networks - Group A	$	275	$	358
Integrated Networks - Group B	213		477
Media & Data Network	64		85
All Other	134		324
Corporate	(170)		302
Total	$	516	$	1,546

The following tables reconcile Net income (loss) attributable to MDC Partners Inc. common shareholders (GAAP) to Adjusted EBITDA (non-GAAP) for the three months ended March 31, 2021 and 2020. The adjustments from Net income (loss) attributable to MDC Partners Inc. common shareholders to Operating income (loss) are detailed in the table above.

	Three Months Ended March 31, 2021
	Integrated Networks - Group A		Integrated Networks - Group B		Media & Data Network		All Other		Corporate		Total
Net income attributable to MDC Partners Inc. common shareholders											921
Non-operating items											26,746
Operating income (loss)	$	11,450	$	19,910	$	3,392	$	4,657	$	(11,742)	$	27,667
Adjustments:
Depreciation and amortization	1,294		3,657		472		1,537		1,216		8,176
Impairment and other losses	—		875		—		—		—		875
Stock-based compensation	(3,628)		953		21		61		630		(1,963)
Deferred acquisition consideration	11,824		128		—		(267)		—		11,685
Distributions from non-consolidated affiliates	—		—		—		—		9		9
Other items, net	1,522		346		1,196		54		2,367		5,485
Adjusted EBITDA	$	22,462	$	25,869	$	5,081	$	6,042	$	(7,520)	$	51,934

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	Three Months Ended March 31, 2020
	Integrated Networks - Group A		Integrated Networks - Group B		Media & Data Network		All Other		Corporate		Total
Net loss attributable to MDC Partners Inc. common shareholders											$	(2,438)
Non-operating items											31,765
Operating income (loss)	$	12,030	$	17,161	$	617	$	7,857	$	(8,338)	$	29,327
Adjustments:
Depreciation and amortization	1,741		4,526		808		1,899		232		9,206
Impairment and other losses	—		161		—		—		—		161
Stock-based compensation	1,961		900		(13)		80		142		3,070
Deferred acquisition consideration	569		(5,612)		375		68		—		(4,600)
Distributions from non-consolidated affiliates	—		—		—		—		(14)		(14)
Other items, net	—		—		—		—		2,416		2,416
Adjusted EBITDA	$	16,301	$	17,136	$	1,787	$	9,904	$	(5,562)	$	39,566

Certain Factors Affecting Our Business

See the Executive Summary section of Item 7 of the Company’s 2020 Form 10-K for information regarding certain factors affecting our business.

32

THREE MONTHS ENDED MARCH 31, 2021 COMPARED TO THREE MONTHS ENDED MARCH 31, 2020

Consolidated Results of Operations

Revenues

Revenue was $307.6 million for the three months ended March 31, 2021 compared to revenue of $327.7 million for the three months ended March 31, 2020.

The components of the fluctuations in revenues for the three months ended March 31, 2021 compared to the three months ended March 31, 2020 were as follows:

	Total				United States				Canada				Other
	$		%		$		%		$		%		$		%
	(Dollars in Thousands)
March 31, 2020	$	327,742			$	264,561			$	18,256			$	44,925
Components of revenue change:
Foreign exchange impact	4,559		1.4	%	—		—	%	1,192		6.5	%	3,367		7.5	%
Non-GAAP acquisitions (dispositions), net	(2,101)		(0.6)	%	(2,101)		(0.8)	%	—		—	%	—		—	%
Organic revenue	(22,615)		(6.9)	%	(19,880)		(7.5)	%	3,202		17.5	%	(5,937)		(13.2)	%
Total change	$	(20,157)	(6.2)	%	$	(21,981)	(8.3)	%	$	4,394	24.1	%	$	(2,570)	(5.7)	%
March 31, 2021	$	307,585			$	242,580			$	22,650			$	42,355

The positive foreign exchange impact of $4.6 million, or 1.4%, was attributable to the fluctuation of the U.S. dollar against the Canadian dollar, Swedish Króna, Euro and British Pound.

For the three months ended March 31, 2021, organic revenue declined $22.6 million, or 6.9%, primarily attributable to reduced spending by clients in connection with the COVID-19 pandemic.

The table below provides a reconciliation between revenue from acquired/disposed businesses in the statement of operations to non-GAAP dispositions, net for the three months ended March 31, 2021:    

	All Other
GAAP Revenue from 2020 and 2021 Dispositions	$	—
Foreign exchange impact	—
Contributions to non-GAAP organic revenue (growth) decline	—
Prior year revenue from dispositions	(2,101)
Non-GAAP dispositions, net	$	(2,101)

The geographic mix in revenues for the three months ended March 31, 2021 and 2020 was as follows:        

	2021		2020
United States	78.9	%	80.7	%
Canada	7.4	%	5.6	%
Other	13.7	%	13.7	%

Operating Income

Operating income for the three months ended March 31, 2021 was $27.7 million, compared to operating income of $29.3 million for the three months ended March 31, 2020, representing a change of $1.7 million, primarily driven by the decline in revenue, mostly offset by a reduction in operating expenses to align our costs with revenues impacted by the COVID-19 pandemic.

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Adjusted EBITDA

Adjusted EBITDA for the three months ended March 31, 2021 was $51.9 million, compared to $39.6 million for the three months ended March 31, 2020, representing an increase of $12.4 million, principally resulting from a reduction in operating expenses, partially offset by the decline in revenues.

Other, Net

Other, net, for the three months ended March 31, 2021 was income of $0.6 million compared to income of $16.3 million for the three months ended March 31, 2020, primarily due to a gain on the sale of a Partner Firm in March 2020.

Foreign Exchange Gain (Loss)

The foreign exchange gain for the three months ended March 31, 2021 was $2.1 million compared to a loss of $14.8 million for the three months ended March 31, 2020. The change in foreign exchange was primarily attributable to the strengthening of the Canadian dollar against the U.S. dollar in 2021 compared to the prior year period, in connection with a U.S. dollar denominated indebtedness that is an obligation of our Canadian parent company.

Interest Expense And Finance Charges, Net

Interest expense and finance charges, net, for the three months ended March 31, 2021 was $19.1 million compared to $15.6 million for the three months ended March 31, 2020, representing an increase of $3.5 million, primarily driven by the impact of a 1% increase in the interest rate of the Company’s Senior Notes and the amortization of consent fees paid to holders of the Senior Notes, both in connection with obtaining consent in December 2020 to the consummation of the proposed combination of MDC with the Stagwell Entities.

Income Tax Expense

Income tax expense for the three months ended March 31, 2021 was $1.3 million (on a pre-tax income of $11.3 million resulting in an effective tax rate of 11.5%) compared to an income tax expense of $13.5 million (on pre-tax income of $15.3 million resulting in an effective tax rate of 88.3%) for the three months ended March 31, 2020.

The effective tax rate of 11.5% for the three months ended March 31, 2021 was primarily due to minimal tax expense recognized on U.S. earnings as a result of being subject to a valuation allowance.

The effective tax rate of 88.3% for the three months ended March 31, 2020 was primarily driven by capital gains, non-deductible stock compensation for which a tax benefit was not recognized, and the jurisdictional mix of earnings.

Noncontrolling Interests

The effect of noncontrolling interests for the three months ended March 31, 2021 was $4.5 million compared to $0.8 million for the three months ended March 31, 2020.

Net Income (Loss) Attributable to MDC Partners Inc. Common Shareholders

As a result of the foregoing, net income attributable to MDC Partners Inc. common shareholders for the three months ended March 31, 2021 was $0.9 million, with $0.01 diluted income per share, compared to net loss attributable to MDC Partners Inc. common shareholders of $2.4 million, or $0.03 diluted loss per share, for the three months ended March 31, 2020.

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Integrated Networks - Group A

The change in expenses, operating income and Adjusted EBITDA as a percentage of revenue in the Integrated Networks - Group A reportable segment for the three months ended March 31, 2021 and 2020 was as follows:

	2021				2020				Change
Integrated Networks - Group A	$		% of Revenue		$		% of Revenue		$		%
	(Dollars in Thousands)
Revenue:	$	102,386			$	90,621			$	11,765	13.0	%
Operating Expenses:
Cost of services sold	62,246		60.8	%	62,524		69.0	%	(278)		(0.4)	%
Office and general expenses	27,396		26.8	%	14,326		15.8	%	13,070		91.2	%
Depreciation and amortization	1,294		1.3	%	1,741		1.9	%	(447)		(25.7)	%
	$	90,936	88.8	%	$	78,591	86.7	%	$	12,345	15.7	%
Operating income	$	11,450	11.2	%	$	12,030	13.3	%	$	(580)	(4.8)	%
Adjusted EBITDA	$	22,462	21.9	%	$	16,301	18.0	%	$	6,161	37.8	%

The increase in revenue was primarily attributable to increased spending by clients for public relations and digital services.

The decrease in operating income was attributable to higher operating expenses, as outlined below, more than offsetting the increase in revenue.

The change in the categories of expenses as a percentage of revenue in the Integrated Networks - Group A reportable segment for the three months ended March 31, 2021 and 2020 was as follows:

	2021				2020				Change
Integrated Networks - Group A	$		% of Revenue		$		% of Revenue		$		%
	(Dollars in Thousands)
Direct costs	$	13,976	13.7	%	$	10,774	11.9	%	$	3,202	29.7	%
Staff costs	57,210		55.9	%	53,510		59.0	%	3,700		6.9	%
Administrative costs	10,260		10.0	%	10,036		11.1	%	224		2.2	%
Deferred acquisitions consideration	11,824		11.5	%	569		0.6	%	11,255		NM
Stock-based compensation	(3,628)		(3.5)	%	1,961		2.2	%	(5,589)		NM
Depreciation and amortization	1,294		1.3	%	1,741		1.9	%	(447)		(25.7)	%
Total operating expenses	$	90,936	88.8	%	$	78,591	86.7	%	$	12,345	15.7	%

The increase in direct costs was in connection with higher revenues in connection with public relations services in the first quarter of 2021.

The increase in staff costs was primarily attributable to costs to support the growth in digital marketing services in the first quarter of 2021.

The increase in deferred acquisition consideration was primarily attributable to the favorable performance of a Partner Firm achieving incremental contractual targets.

Stock-based compensation expense was a credit in the first quarter of 2021, driven by a reduction in previously projected results in connection with awards tied to performance.

The increase in Adjusted EBITDA was driven by higher revenue, partially offset by higher expenses.

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Integrated Networks - Group B

The change in expenses, operating income and Adjusted EBITDA as a percentage of revenue in the Integrated Networks - Group B reportable segment for the three months ended March 31, 2021 and 2020 was as follows:

	2021				2020				Change
Integrated Networks - Group B	$		% of Revenue		$		% of Revenue		$		%
	(Dollars in Thousands)
Revenue:	$	111,151			$	117,707			$	(6,556)	(5.6)	%
Operating Expenses:
Cost of services sold	61,581		55.4	%	74,021		62.9	%	(12,440)		(16.8)	%
Office and general expenses	25,128		22.6	%	21,838		18.6	%	3,290		15.1	%
Depreciation and amortization	3,657		3.3	%	4,526		3.8	%	(869)		(19.2)	%
Impairment and other losses	875		0.8	%	161		0.1	%	714		NM
	$	91,241	82.1	%	$	100,546	85.4	%	$	(9,305)	(9.3)	%
Operating income	$	19,910	17.9	%	$	17,161	14.6	%	$	2,749	16.0	%
Adjusted EBITDA	$	25,869	23.3	%	$	17,136	14.6	%	$	8,733	51.0	%

The decrease in revenue was primarily attributable to lower spending by clients in connection with the COVID-19 pandemic, partially offset by higher digital marketing services in the first quarter of 2021.

The increase in operating income was attributable to lower operating expenses, as outlined below, partially offset by the decline in revenue.

The change in the categories of expenses as a percentage of revenue in the Integrated Networks - Group B reportable segment for the three months ended March 31, 2021 and 2020 was as follows:

	2021				2020				Change
Integrated Networks - Group B	$		% of Revenue		$		% of Revenue		$		%
	(Dollars in Thousands)
Direct costs	$	7,761	7.0	%	$	14,439	12.3	%	$	(6,678)	(46.2)	%
Staff costs	66,397		59.7	%	70,576		60.0	%	(4,179)		(5.9)	%
Administrative costs	11,470		10.3	%	15,556		13.2	%	(4,086)		(26.3)	%
Deferred acquisitions consideration	128		0.1	%	(5,612)		(4.8)	%	5,740		NM
Stock-based compensation	953		0.9	%	900		0.8	%	53		5.9	%
Depreciation and amortization	3,657		3.3	%	4,526		3.8	%	(869)		(19.2)	%
Impairment and other losses	875		0.8	%	161		0.1	%	714		NM
Total operating expenses	$	91,241	82.1	%	$	100,546	85.4	%	$	(9,305)	(9.3)	%

Direct costs declined in connection with the reduction in revenue as discussed above.

The decline in staff costs was attributable to a reduction in staff to combat the impact of the COVID-19 pandemic on the business.

Administrative costs were lower due to a decline in spending resulting from the orders to work-from-home given the COVID-19 pandemic and related cost containment initiatives.

The increase in Adjusted EBITDA was for the same reasons as the change in operating income.

Media & Data Network

The change in expenses, operating income and Adjusted EBITDA as a percentage of revenue in the Media & Data Network reportable segment for the three months ended March 31, 2021 and 2020 was as follows:

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	2021				2020				Change
Media & Data Network	$		% of Revenue		$		% of Revenue		$		%
	(Dollars in Thousands)
Revenue:	$	36,783			$	41,058			$	(4,275)	(10.4)	%
Operating Expenses:
Cost of services sold	25,574		69.5	%	29,906		72.8	%	(4,332)		(14.5)	%
Office and general expenses	7,345		20.0	%	9,727		23.7	%	(2,382)		(24.5)	%
Depreciation and amortization	472		1.3	%	808		2.0	%	(336)		(41.6)	%
	$	33,391	90.8	%	$	40,441	98.5	%	$	(7,050)	(17.4)	%
Operating income	3,392		9.2	%	617		1.5	%	2,775		NM
Adjusted EBITDA	$	5,081	13.8	%	$	1,787	4.4	%	$	3,294	NM

The decrease in revenue was primarily attributable to lower spending by media clients in connection with the COVID-19 pandemic, partially offset by an increase in digital services.

The increase in operating income was attributable to lower operating expenses, as outlined below, partially offset by the decline in revenue.

The change in the categories of expenses as a percentage of revenue in the Media & Data Network reportable segment for the three months ended March 31, 2021 and 2020 was as follows:

	2021				2020				Change
Media & Data Network	$		% of Revenue		$		% of Revenue		$		%
	(Dollars in Thousands)
Direct costs	$	8,031	21.8	%	$	12,128	29.5	%	$	(4,097)	(33.8)	%
Staff costs	19,790		53.8	%	20,600		50.2	%	(810)		(3.9)	%
Administrative costs	5,077		13.8	%	6,543		15.9	%	(1,466)		(22.4)	%
Deferred acquisition consideration	—		—	%	375		0.9	%	(375)		(100.0)	%
Stock-based compensation	21		0.1	%	(13)		—	%	34		NM
Depreciation and amortization	472		1.3	%	808		2.0	%	(336)		(41.6)	%
Total operating expenses	$	33,391	90.8	%	$	40,441	98.5	%	$	(7,050)	(17.4)	%

Direct costs declined in connection with the reduction in revenue as discussed above.

Administrative costs were lower due to a decline in spending resulting from the orders to work-from-home given the COVID-19 pandemic and other cost containment initiatives.

The increase in Adjusted EBITDA was principally for the same reasons as the change in operating income.

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All Other

The change in expenses, operating income and Adjusted EBITDA as a percentage of revenue in the All Other category for the three months ended March 31, 2021 and 2020 was as follows:

	2021				2020				Change
All Other	$		% of Revenue		$		% of Revenue		$		%
	(Dollars in Thousands)
Revenue:	$	57,265			$	78,356			$	(21,091)	(26.9)	%
Operating Expenses:
Cost of services sold	37,520		65.5	%	56,243		71.8	%	(18,723)		(33.3)	%
Office and general expenses	13,551		23.7	%	12,357		15.8	%	1,194		9.7	%
Depreciation and amortization	1,537		2.7	%	1,899		2.4	%	(362)		(19.1)	%
	$	52,608	91.9	%	$	70,499	90.0	%	$	(17,891)	(25.4)	%
Operating income	$	4,657	8.1	%	$	7,857	10.0	%	$	(3,200)	(40.7)	%
Adjusted EBITDA	$	6,042	10.6	%	$	9,904	12.6	%	$	(3,862)	(39.0)	%

The decrease in revenue was primarily attributable to the impact of the COVID-19 pandemic primarily on the experiential marketing business.

The decrease in operating income was attributable to the decline in revenue, partially offset by lower operating expenses, as outlined below.

The change in the categories of expenses as a percentage of revenue in the All Other category for the three months ended March 31, 2021 and 2020 was as follows:

	2021				2020				Change
All Other	$		% of Revenue		$		% of Revenue		$		%
	(Dollars in Thousands)
Direct costs	$	7,837	13.7	%	$	19,224	24.5	%	$	(11,387)	(59.2)	%
Staff costs	35,713		62.4	%	42,083		53.7	%	(6,370)		(15.1)	%
Administrative costs	7,727		13.5	%	7,145		9.1	%	582		8.1	%
Deferred acquisition consideration	(267)		(0.5)	%	68		0.1	%	(335)		NM
Stock-based compensation	61		0.1	%	80		0.1	%	(19)		(23.8)	%
Depreciation and amortization	1,537		2.7	%	1,899		2.4	%	(362)		(19.1)	%
Total operating expenses	$	52,608	91.9	%	$	70,499	90.0	%	$	(17,891)	(25.4)	%

Direct costs declined in line with the reduction in revenues as discussed above.

The decline in staff costs was primarily attributable to a reduction in staff to combat the impact on the business from the COVID-19 pandemic.

The decline in Adjusted EBITDA is principally for the same reasons as the change in operating income.

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Corporate

The change in operating expenses and Adjusted EBITDA for Corporate for the three months ended March 31, 2021 and 2020 was as follows:

	2021		2020		Change
Corporate	$		$		$		%
	(Dollars in Thousands)
Staff costs	$	7,126	$	4,917	$	2,209	44.9	%
Administrative costs	2,770		3,047		(277)		(9.1)	%
Stock-based compensation	630		142		488		NM
Depreciation and amortization	$	1,216	$	232	$	984	NM
Total operating expenses	$	11,742	$	8,338	$	3,404	40.8	%
Adjusted EBITDA	$	(7,520)	$	(5,562)	$	(1,958)	35.2	%

Operating expenses increased primarily due to higher incentive compensation, driving the change in Adjusted EBITDA, and depreciation expense in connection with the Company’s new headquarters.

Liquidity and Capital Resources:

Liquidity

The following table provides summary information about the Company’s liquidity position:

	March 31, 2021		March 31, 2020
	(Dollars in Thousands)
Net cash provided by (used in) operating activities	$	47,060	$	(19,955)
Net cash provided by (used in) investing activities	$	(7,032)	$	16,645
Net cash provided by financing activities	$	13,427	$	119,642

Early in 2020, the Company took actions to combat the impact of COVID-19 on our operations, including liquidity. We will continue to monitor the worldwide public health threat, government actions to combat COVID-19 and the impact such developments may have on our liquidity. If the impact of the pandemic is beyond our expectation, the Company believes it is well positioned through the actions implemented at the beginning of the pandemic to successfully work through the effects of COVID-19 for the foreseeable future.

The Company had cash and cash equivalents of $113.3 million and $60.8 million as of March 31, 2021 and December 31, 2020, respectively. The Company intends to maintain sufficient cash and/or available borrowings to fund operations for the next twelve months. The Company has historically been able to maintain and expand its business using cash generated from operating activities, funds available under its Credit Agreement, and other initiatives, such as obtaining additional debt and equity financing. At March 31, 2021, the Company had $20.0 million of borrowings outstanding and $172.3 million available under the Credit Agreement.

The Company’s obligations extending beyond twelve months primarily consist of deferred acquisition payments, capital expenditures, scheduled lease obligation payments, and interest payments on borrowings under the Company’s Senior Notes. Based on the current outlook, the Company believes future cash flows from operations, together with the Company’s existing cash balance and availability of funds under the Company’s Credit Agreement, will be sufficient to meet the Company’s anticipated cash needs for the next twelve months. The Company’s ability to make scheduled deferred acquisition payments, principal and interest payments, to refinance indebtedness or to fund planned capital expenditures will depend on future performance, which is subject to general economic conditions, the competitive environment and other factors, including those described in the Company’s 2020 Form 10-K and in the Company’s other SEC filings.

Cash Flows

Operating Activities

Cash flows provided by operating activities for the three months ended March 31, 2021 were $47.1 million, primarily reflecting earnings and favorable working capital requirements.

39

Cash flows used in operating activities for the three months ended March 31, 2020 were $20.0 million, primarily reflecting unfavorable working capital requirements, driven by media and other supplier payments.

Investing Activities

During the three months ended March 31, 2021, cash flows used in investing activities were $7.0 million, which was primarily due to capital expenditures of $13.4 million, primarily related to the Company’s new headquarters at One World Trade Center, partially offset by receipt of $7.1 million of deferred proceeds from the sale of the Company’s equity interest in a Partner Firm in the first quarter of 2020.

During the three months ended March 31, 2020, cash flows provided by investing activities were $16.6 million, which primarily consisted of proceeds of $18.9 million from the sale of the Company’s equity interest in a Partner Firm, partially offset by $1.5 million of capital expenditures and $0.7 million paid for acquisitions.

Financing Activities

During the three months ended March 31, 2021, cash flows provided by financing activities were $13.4 million, which primarily consisted of $20.0 million in net borrowings under the Credit Agreement, partially offset by $5.5 million in distributions to minority interest holders and $1.1 million in deferred acquisition consideration payments.

During the three months ended March 31, 2020, cash flows provided by financing activities were $119.6 million, primarily driven by $125.0 million in new borrowings under the Credit Agreement, offset by $4.6 million in distributions to minority interest holders and $0.8 million in deferred acquisition consideration payments.

Total Debt

Debt, net of debt issuance costs, as of March 31, 2021 was $864.9 million as compared to $843.2 million outstanding at December 31, 2020. The increase of $21.7 million in debt was primarily a result of the Company’s borrowings under the Credit Agreement. See Note 7 of the Notes to the Unaudited Condensed Consolidated Financial Statements for information regarding the Company’s Senior Notes and $211.5 million senior secured revolving credit agreement due February 3, 2022 (the “Credit Agreement”).

The Company is currently in compliance with all of the terms and conditions of the Credit Agreement, and management believes, based on its current financial projections, that the Company will be in compliance with its covenants over the next twelve months.

If the Company loses all or a substantial portion of its lines of credit under the Credit Agreement, or if the Company uses the maximum available amount under the Credit Agreement, it will be required to seek other sources of liquidity. If the Company were unable to find these sources of liquidity, for example through an equity offering or access to the capital markets, the Company’s ability to fund its working capital needs and any contingent obligations with respect to acquisitions and redeemable noncontrolling interests would be adversely affected.

Pursuant to the Credit Agreement, the Company must comply with certain financial covenants including, among other things, covenants for (i) total senior leverage ratio, (ii) total leverage ratio, (iii) fixed charges ratio, and (iv) minimum earnings before interest, taxes and depreciation and amortization, in each case as such term is specifically defined in the Credit Agreement. For the period ended March 31, 2021, the Company’s calculation of each of these covenants, and the specific requirements under the Credit Agreement, respectively, were calculated based on the trailing twelve months as follows:

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	March 31, 2021
Total Senior Leverage Ratio	(0.24)
Maximum per covenant	2.00
Total Leverage Ratio	4.10
Maximum per covenant	5.50
Fixed Charges Ratio	2.81
Minimum per covenant	1.00
Earnings before interest, taxes, depreciation and amortization (in millions)	$	200.7
Minimum per covenant (in millions)	$	120.0

These ratios and measures are not based on GAAP and are not presented as alternative measures of operating performance or liquidity. Some of these ratios and measures include, among other things, pro forma adjustments for acquisitions, one-time charges, and other items, as defined in the Credit Agreement. They are presented here to demonstrate compliance with the covenants in the Credit Agreement, as non-compliance with such covenants could have a material adverse effect on the Company.

Contractual Obligations and Other Commercial Commitments

The Company’s agencies enter into contractual commitments with media providers and agreements with production companies on behalf of its clients at levels that exceed the revenue from services. Some of our agencies purchase media for clients and act as an agent for a disclosed principal. These commitments are included in Accounts payable and Accruals and other liabilities when the media services are delivered by the media providers. MDC takes precautions against default on payment for these services and has historically had a very low incidence of default. MDC is still exposed to the risk of significant uncollectible receivables from our clients. The risk of a material loss could significantly increase in periods of severe economic downturn.

Deferred acquisition consideration on the balance sheet consists of deferred obligations related to contingent and fixed purchase price payments, and to a lesser extent, contingent and fixed retention payments tied to continued employment of specific personnel. See Note 5 of the Notes to the Unaudited Condensed Consolidated Financial Statements for additional information regarding contingent deferred acquisition consideration.

When acquiring less than 100% ownership of an entity, the Company may enter into agreements that give the Company an option to purchase, or require the Company to purchase, the incremental ownership interests under certain circumstances. Where the incremental purchase may be required of the Company, the amounts are recorded as redeemable noncontrolling interests in mezzanine equity. See Note 8 of the Notes to the Unaudited Condensed Consolidated Financial Statements for additional information regarding redeemable noncontrolling interests.

The Company intends to finance the cash portion of these contingent payment obligations using available cash from operations, borrowings under the Credit Agreement (and refinancings thereof), and, if necessary, through the incurrence of additional debt and/or issuance of additional equity. The ultimate amount payable in the future relating to these transactions will vary because it is dependent on the future results of operations of the subject businesses and the timing of when these rights are exercised.

Critical Accounting Policies

See the Company’s 2020 Form 10-K for information regarding the Company’s critical accounting policies.

41

New Accounting Pronouncements

Website Access to Company Reports and Information

MDC Partners Inc.’s Internet website address is www.mdc-partners.com. The Company’s Annual Reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, and any amendments to those reports filed or furnished pursuant to section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act” ), will be made available free of charge through the Company’s website as soon as reasonably practical after those reports are electronically filed with, or furnished to, the SEC.  The information found on, or otherwise accessible through, the Company’s website is not incorporated into, and does not form a part of, this quarterly report on Form 10-Q. From time to time, the Company may use its website as a channel of distribution of material company information.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk

The Company is exposed to market risk related to interest rates, foreign currencies and impairment risk.

Debt Instruments:  At March 31, 2021, the Company’s debt obligations consisted of amounts outstanding under its Credit Agreement and the Senior Notes. The Senior Notes bear a fixed 7.50% interest rate. The Credit Agreement bears interest at variable rates based upon the Euro rate, U.S. bank prime rate and U.S. base rate, at the Company’s option. The Company’s ability to obtain the required bank syndication commitments depends in part on conditions in the bank market at the time of syndication. Given that there were $20.0 million in borrowings under the Credit Agreement, as of March 31, 2021, a 1.0% increase or decrease in the weighted average interest rate, which was 4.46% at March 31, 2021, would have an interest impact of approximately $0.2 million.

Foreign Exchange:  While the Company primarily conducts business in markets that use the U.S. dollar, the Canadian dollar, the Euro and the British Pound, its non-U.S. operations transact business in numerous different currencies. The Company’s results of operations are subject to risk from the translation to the U.S. dollar of the revenue and expenses of its non-U.S. operations. The effects of currency exchange rate fluctuations on the translation of the Company’s results of operations are discussed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and in Note 2 of the Company’s 2020 Form 10-K. For the most part, revenues and expenses incurred related to the non-U.S. operations are denominated in their functional currency. This minimizes the impact that fluctuations in exchange rates will have on profit margins. Translation of intercompany debt, which is not intended to be repaid, is included in cumulative translation adjustments. Translation of current intercompany balances are included in net earnings (loss). The Company generally does not enter into foreign currency forward exchange contracts or other derivative financial instruments to hedge the effects of adverse fluctuations in foreign currency exchange rates.

The Company is exposed to foreign currency fluctuations relating to its intercompany balances between the U.S. and Canada. For every one cent change in the foreign exchange rate between the U.S. and Canada, the impact to the Company’s financial statements would be approximately $2.2 million.

Impairment Risk: At March 31, 2021, the Company had goodwill of $669.1 million. The Company reviews goodwill for impairment annually as of October 1st of each year or more frequently if indicators of potential impairment exist. See the Critical Accounting Policies and Estimates section in the Company’s 2020 Form 10-K for information related to impairment testing and the risk of potential impairment charges in future periods.

Item 4.    Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures designed to ensure that information required to be included in our SEC reports is recorded, processed, summarized and reported within the applicable time periods specified by the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer (“CEO”), who is our principal executive officer, and Chief Financial Officer (“CFO”), who is our principal financial officer, as appropriate, to allow timely decisions regarding required disclosures. There are inherent limitations to the effectiveness of any system of disclosure controls and procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures. Accordingly, even effective disclosure controls and procedures can provide only reasonable assurance of achieving their control objectives. However, our disclosure controls and procedures are designed to provide reasonable assurances of achieving our control objectives.

We conducted an evaluation, under the supervision and with the participation of our management, including our CEO, CFO and management Disclosure Committee, of the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report pursuant to Rule 13a-15(e) and 15(d)-15(e) of the Exchange Act. Based on that evaluation our CEO and CFO concluded that our disclosure controls and procedures are effective as of March 31, 2021.

42

Changes in Internal Control Over Financial Reporting

We have given consideration to the impact of the COVID-19 and have concluded that there have been no changes in our internal controls over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

Item 1.    Legal Proceedings

In the ordinary course of business, we are involved in various legal proceedings. We do not currently expect that these proceedings will have a material adverse effect on our results of operations, cash flows or financial position.

Item 1A.    Risk Factors

There have been no material changes to the risk factors in Part I, Item 1A “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2020. These risks could materially and adversely affect our business, results of operations, financial condition, cash flows, projected results and future prospects. These risks are not exclusive and additional risks to which we are subject include the factors listed under “Note About Forward-Looking Statements” and the risks described in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this Quarterly Report on Form 10-Q.

Item 2.    Unregistered Sales of Equity Securities and Use of Proceeds

In the three months ended Mar 31, 2021, the Company issued 50,000 Class A shares in a transaction exempt from registration under Section 4(a)(2) of the Securities Act of 1933, as amended. These shares were issued as payment to a member of management of a subsidiary for an acquisition by the Company of additional interests in the majority-owned subsidiary. The Company received no cash proceeds and no commissions were paid to any person in connection with the issuance of the shares.

Purchase of Equity Securities by the Issuer and Affiliated Purchasers

For the three months ended March 31, 2021, the Company made no open market purchases of its Class A shares or its Class B shares. Pursuant to its Credit Agreement and the indenture governing the Senior Notes, the Company is currently limited as to the dollar amount of shares it may repurchase in the open market.

For the three months ended March 31, 2021, the Company’s employees surrendered Class A shares in connection with the required tax withholding resulting from the vesting of restricted stock. The Company paid these withholding taxes on behalf of the related employees. These Class A shares were subsequently retired and no longer remain outstanding as of March 31, 2021. The following table details those shares withheld during the first quarter of 2021:

Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Maximum Number of Shares That May Yet Be Purchased Under the Program
1/1/2021 - 1/31/2021	10,117	$	3.29	—	—
2/1/2021 - 2/28/2021	54,403	2.51		—	—
3/1/2021 - 3/31/2021				—	—
Total	64,520	$	2.90	—	—

Item 3.    Defaults Upon Senior Securities

None.

Item 4.    Mine Safety Disclosures

Not applicable.

43

Item 5.    Other Information

None

Item 6.    Exhibits

The exhibits required by this item are listed on the Exhibit Index.

44

EXHIBIT INDEX

Exhibit No.	Description
3.1	Articles of Amalgamation, dated January 1, 2004 (incorporated by reference to Exhibit 3.1 to the Company’s Form 10-Q filed on May 10, 2004).
3.1.1	Articles of Continuance, dated June 28, 2004 (incorporated by reference to Exhibit 3.3 to the Company’s Form 10-Q filed on August 4, 2004).
3.1.2	Articles of Amalgamation, dated July 1, 2010 (incorporated by reference to Exhibit 3.1 to the Company’s Form 10-Q filed on July 30, 2010).
3.1.3	Articles of Amalgamation, dated May 1, 2011 (incorporated by reference to Exhibit 3.1 to the Company’s Form 10-Q filed on May 2, 2011).
3.1.4	Articles of Amalgamation, dated January 1, 2013 (incorporated by reference to Exhibit 3.1.4 to the Company’s Form 10-K filed on March 10, 2014).
3.1.5	Articles of Amalgamation, dated April 1, 2013 (incorporated by reference to Exhibit 3.1.5 to the Company’s Form 10-K filed on March 10, 2014).
3.1.6	Articles of Amalgamation, dated July 1, 2013 (incorporated by reference to Exhibit 3.1.6 to the Company’s Form 10-K filed on March 10, 2014).
3.1.7	Articles of Amendment, dated March 7, 2017 (incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K filed on March 7, 2017).
3.1.8	Articles of Amendment, dated March 14, 2019 (incorporated by reference to Exhibit 3.1 to the Company's Form 8-K filed on March 15, 2019).
3.2	General By-law No. 1, as amended on April 29, 2005 (incorporated by reference to Exhibit 3.2 to the Company’s Form 10-K filed on March 16, 2007).
4.1	Second Supplemental Indenture, dated as of January 13, 2021, among the Company, the Note Guarantors party thereto and the Bank of New York Mellon, as trustee (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on January 13, 2021.
4.2	Third Supplemental Indenture, dated as of February 8, 2021, among the Company, the Note Guarantors party thereto and the Bank of New York Mellon, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Form 8-K filed on February 9, 2021)
10.1	Goldman Letter Agreement, dated as of April 21, 2021, by and among MDC Partners Inc., Broad Street Principal Investments, L.L.C., Stonebridge 2017, L.P. and Stonebridge 2017 Offshore, L.P. (incorporated by reference to Exhibit 10.1 to the Company’s Amendment No. 2 to Registration Statement on Form S-4 filed on April 21, 2021).
31.1	Certification by Chief Executive Officer pursuant to Rules 13a - 14(a) and 15d - 14(a) under the Securities Exchange Act of 1934 and Section 302 of the Sarbanes-Oxley Act of 2002.*
31.2	Certification by Chief Financial Officer pursuant to Rules 13a - 14(a) and 15d - 14(a) under the Securities Exchange Act of 1934 and Section 302 of the Sarbanes-Oxley Act of 2002.*
32.1	Certification by Chief Executive Officer pursuant to 18 USC. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*
32.2	Certification by Chief Financial Officer pursuant to 18 USC. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*
101	Interactive Data File, for the period ended March 31, 2021. The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.*
104	Cover Page Interactive Data File. The cover page XBRL tags are embedded within the inline XBRL document and are included in Exhibit 101.*

* Filed electronically herewith.

† Indicates management contract or compensatory plan.

45

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

MDC PARTNERS INC.

/s/ Mark Penn

Mark Penn

Chairman of the Board and Chief Executive Officer (Principal Executive Officer)

May 10, 2021

/s/ Frank Lanuto

Frank Lanuto

Chief Financial Officer (Principal Financial Officer)

May 10, 2021

46

EX-31.1

Exhibit 31.1

Certification Pursuant to Rules 13a-14(a) and 15d-14(a) as Adopted Pursuant to Section

302 of the Sarbanes-Oxley Act of 2002

I, Mark Penn, certify that:

1.I have reviewed this quarterly report on Form 10-Q for the quarter ended March 31, 2021 of MDC Partners Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 10, 2021		/s/ MARK PENN
	By:	Mark Penn
	Title:	Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification Pursuant to Rules 13a-14(a) and 15d-14(a) as Adopted Pursuant to Section

302 of the Sarbanes-Oxley Act of 2002

I, Frank Lanuto, certify that:

1.I have reviewed this quarterly report on Form 10-Q for the quarter ended March 31, 2021 of MDC Partners Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 10, 2021		/s/ FRANK LANUTO
	By:	Frank Lanuto
	Title:	Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the

Sarbanes-Oxley Act of 2002

In connection with the quarterly report of MDC Partners Inc. (the “Company”) on Form 10-Q for the quarter ended March 31, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mark Penn, Chairman and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to my knowledge, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 10, 2021
/s/ MARK PENN
By:	Mark Penn
Title:	Chairman and Chief Executive Officer

EX-32.2

Exhibit 32.2

Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the

Sarbanes-Oxley Act of 2002

In connection with the quarterly report of MDC Partners Inc. (the “Company”) on Form 10-Q for the quarter ended March 31, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Frank Lanuto, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to my knowledge, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 10, 2021
/s/ FRANK LANUTO
By:	Frank Lanuto
Title:	Chief Financial Officer

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2021	Apr. 30, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-13718
Entity Registrant Name	MDC Partners Inc
Entity Incorporation, State or Country Code	Z4
Entity Tax Identification Number	98-0364441
Entity Address, Address Line One	One World Trade Center, Floor 65
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10007
City Area Code	646
Local Phone Number	429-1800
Title of 12(b) Security	Class A Subordinate Voting Shares, no par value
Trading Symbol	MDCA
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000876883
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		77,181,293
Common Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		3,743

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue:
Services	$ 307,585	$ 327,742
Operating expenses:
Cost of services sold	186,921	222,694
Office and general expenses	83,946	66,354
Depreciation and amortization	8,176	9,206
Impairment and other losses	875	161
Costs and Expenses, Total	279,918	298,415
Operating income	27,667	29,327
Other income (expense):
Interest expense and finance charges, net	(19,065)	(15,611)
Foreign exchange gain (loss)	2,080	(14,757)
Other, net	614	16,334
Nonoperating Income (Expense), Total	(16,371)	(14,034)
Income before income taxes and equity in earnings of non-consolidated affiliates	11,296	15,293
Income tax expense	1,302	13,500
Income before equity in earnings of non-consolidated affiliates	9,994	1,793
Equity in losses of non-consolidated affiliates	(493)	0
Net income	9,501	1,793
Net income attributable to the noncontrolling interest	(4,491)	(791)
Net income attributable to MDC Partners Inc.	5,010	1,002
Net income (loss) attributable to MDC Partners Inc. common shareholders	$ 921	$ (2,438)
Basic and diluted
Earnings per share, basic	$ 0.01	$ (0.03)
Earnings per share, diluted	$ 0.01	$ (0.03)
Weighted Average Number of Common Shares Outstanding:
Weighted Average Number of Shares Outstanding, Basic	73,392,824	72,397,661,000
Weighted Average Number of Shares Outstanding, Diluted	75,439,066	72,397,661,000
Series 4 Convertible Preferred Stock [Domain] | Preferred Stock
Other income (expense):
Accretion on and net income allocated to convertible preference shares	$ (4,089)	$ (3,440)

XML

UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Comprehensive income (loss)
Net loss	$ 9,501	$ 1,793
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustment	(3,507)	7,429
Other comprehensive income (loss)	(3,507)	7,429
Comprehensive income for the period	5,994	9,222
Comprehensive income attributable to the noncontrolling interests	(3,539)	(282)
Comprehensive income attributable to MDC Partners Inc.	$ 2,455	$ 8,940

XML

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 113,340	$ 60,757
Accounts receivable, less allowance for doubtful accounts of $4,498 and $5,473	377,670	374,892
Expenditures billable to clients	22,824	10,552
Other current assets	31,687	40,938
Total Current Assets	545,521	487,139
Fixed assets, at cost, less accumulated depreciation of $137,729 and $136,166	85,085	90,413
Right-of-use assets - operating leases	207,418	214,188
Goodwill	669,060	668,211
Other intangible assets, net	30,784	33,844
Other assets	22,845	17,517
Total Assets	1,560,713	1,511,312
Current Liabilities
Accounts payable	209,679	168,396
Accruals and other liabilities	242,667	274,968
Current portion of lease liabilities - operating leases	41,229	41,208
Current portion of deferred acquisition consideration	52,156	53,730
Total Current Liabilities	715,890	691,258
Long-term debt	864,850	843,184
Long-term portion of deferred acquisition consideration	41,244	29,335
Long-term lease liabilities - operating leases	241,375	247,243
Other liabilities	77,585	82,065
Total Liabilities	1,940,944	1,893,085
Redeemable Noncontrolling Interests	25,352	27,137
Commitments, Contingencies and Guarantees (Note 9)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Convertible preference shares, 145,000 authorized, issued and outstanding at March 31, 2021 and December 31, 2020	152,746	152,746
Common stock and other paid-in capital	106,193	104,367
Accumulated deficit	(704,741)	(709,751)
Accumulated other comprehensive income	183	2,739
MDC Partners Inc. Shareholders' Deficit	(445,619)	(449,899)
Noncontrolling interests	40,036	40,989
Total Shareholders' Deficit	(405,583)	(408,910)
Liabilities and Equity, Total	$ 1,560,713	$ 1,511,312

XML

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4,498	$ 5,473
Fixed assets, accumulated depreciation	$ 137,729	$ 136,166
Preference shares, authorized (in shares)	145,000	145,000
Preference shares, issued (in shares)	145,000	145,000
Preference shares, outstanding (in shares)	145,000	145,000

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net loss	$ 9,501	$ 1,793
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Stock-based compensation	(1,963)	3,070
Depreciation and amortization	8,176	9,206
Impairment and other losses	875	161
Adjustment to deferred acquisition consideration	11,685	(4,600)
Deferred income taxes	63	8,511
Changes in working capital:
Accounts receivable	(2,779)	41,148
Expenditures billable to clients	(12,272)	7,370
Prepaid expenses and other current assets	(7,615)	(3,385)
Accounts payable, accruals and other liabilities	23,977	(62,120)
Acquisition related payments	(473)	(782)
Advance billings	17,203	(24,816)
Net cash provided by (used in) operating activities	47,060	(19,955)
Cash flows from investing activities:
Capital expenditures	(13,423)	(1,546)
Proceeds from sale of assets	7,080	18,920
Acquisitions, net of cash acquired	0	(729)
Other	(689)	0
Net cash provided by (used in) investing activities	(7,032)	16,645
Repayment of borrowing under revolving credit facility
Acquisition related payments	(1,087)	(750)
Distributions to noncontrolling interests and other	(5,486)	(4,608)
Net cash provided by financing activities	13,427	119,642
Effect of exchange rate changes on cash and cash equivalents	(872)	(2,164)
Net increase in cash and cash equivalents	52,583	114,168
Cash and cash equivalents at beginning of period	60,757	106,933
Cash and cash equivalents at end of period	113,340	221,101
Supplemental disclosures:
Cash income taxes paid	251	849
Cash interest paid	317	145
Wells Fargo Capital Finance, LLC | Revolving Credit Facility
Repayment of borrowing under revolving credit facility
Repayment of borrowing under revolving credit facility	(140,950)	(125,333)
Proceeds from revolving credit facility	$ 160,950	$ 250,333

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT - USD ($) $ in Thousands	Total	Convertible Preference Shares	Common Shares	Common Stock and Other Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income	MDC Partners Inc. Shareholders' Deficit	Noncontrolling Interests	Series 4 Convertible Preferred Stock [Member] Convertible Preference Shares
Balance at Dec. 31, 2019	$ (190,575)	$ 152,746		$ 101,469	$ (480,779)	$ (4,269)	$ (230,833)	$ 40,258
Balance (in shares) at Dec. 31, 2019									145,000,000
Common stock, balance (in shares) at Dec. 31, 2019			72,154,603
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss attributable to MDC Partners Inc.	1,002				1,002
Other comprehensive loss	7,429					7,938	7,938	(509)
Issuance of restricted stock	0
Issuance of restricted stock (in shares)			587,227
Shares acquired and cancelled	(637)			(637)			(637)
Shares acquired and cancelled (in shares)			(258,664)
Stock-based compensation	476			476			476
Changes in redemption value of redeemable noncontrolling interests	(1,218)			(1,218)			(1,218)
Business acquisitions and step-up transactions, net of tax	(503)			(503)			(503)
Other	82			0	82		82	0
Balance at Mar. 31, 2020	(183,944)	152,746		99,587	(479,695)	3,669	(223,693)	39,749
Balance (in shares) at Mar. 31, 2020									145,000,000
Common stock, balance (in shares) at Mar. 31, 2020			72,483,166
Balance at Dec. 31, 2020	(408,910)	152,746		104,367	(709,751)	2,739	(449,899)	40,989
Balance (in shares) at Dec. 31, 2020									145,000,000
Common stock, balance (in shares) at Dec. 31, 2020			73,532,848
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss attributable to MDC Partners Inc.	5,010				5,010
Other comprehensive loss	(3,507)					(2,555)	(2,555)	(952)
Issuance of restricted stock	0
Issuance of restricted stock (in shares)			1,322,732
Shares acquired and cancelled	(202)			(202)			(202)
Shares acquired and cancelled (in shares)			(64,520)
Stock-based compensation	1,035			1,035			1,035
Changes in redemption value of redeemable noncontrolling interests	1,681			1,681			1,681
Business acquisitions and step-up transactions, net of tax	(330)			(330)			(330)
Other	(360)			(358)	0		(359)	(1)
Balance at Mar. 31, 2021	$ (405,583)	$ 152,746		$ 106,193	$ (704,741)	$ 183	$ (445,619)	$ 40,036
Balance (in shares) at Mar. 31, 2021									145,000,000
Common stock, balance (in shares) at Mar. 31, 2021			74,791,060

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Basis of Presentation and Recent Developments

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Recent Developments

Basis of Presentation and Recent Developments

MDC Partners Inc. (the “Company” or “MDC”), incorporated under the laws of Canada, is a leading provider of global marketing, advertising, activation, communications and strategic consulting solutions. Through its Networks (and underlying agencies generally referred to as “Partner Firms”), MDC delivers a wide range of customized services in order to drive growth and business performance for its clients.

The accompanying consolidated financial statements include the accounts of MDC, its subsidiaries and variable interest entities for which the Company is the primary beneficiary. MDC has prepared the unaudited condensed consolidated interim financial statements included herein in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for reporting interim financial information on Form 10-Q. Accordingly, the financial statements have been condensed and do not include certain information and disclosures pursuant to these rules. The preparation of financial statements in conformity with GAAP requires us to make judgments, assumptions and estimates about current and future results of operations and cash flows that affect the amounts reported and disclosed. Actual results could differ from these estimates and assumptions. The consolidated results for interim periods are not necessarily indicative of results for the full year and should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (“2020 10-K”).

The COVID-19 pandemic continues to negatively affect the global economy and the Company’s operations. The pandemic did not begin to impact the Company’s operations in a significant manner until the second quarter of 2020. Therefore, our first quarter of 2021 comparisons to the first quarter of 2020 are affected by the impact of the pandemic on our operations in the first quarter of 2021. Early in 2020, the Company took actions to combat the impact of COVID-19 on our operations. We will continue to monitor the worldwide public health threat, government actions to combat COVID-19 and the impact such developments may have on the overall economy, our clients and operations. If the impact of the pandemic is beyond our expectation, the Company believes it is well positioned through the actions implemented at the beginning of the pandemic to successfully work through the effects of COVID-19 in 2021. The impact of the pandemic and the corresponding actions are reflected in our judgments, assumptions and estimates in the preparation of the financial statements. The judgments, assumptions and estimates will be updated and could result in different results in the future depending on the continued impact of the COVID-19 pandemic.

The accompanying financial statements reflect all adjustments, consisting of normally recurring accruals, which in the opinion of management are necessary for a fair presentation, in all material respects, of the information contained therein. Intercompany balances and transactions have been eliminated in consolidation. Certain reclassifications have been made to the prior year financial information to conform to the current year presentation.

Recent Developments

On December 21, 2020, MDC and Stagwell Media LP (“Stagwell”) announced that they had entered into a definitive transaction agreement (the “Transaction Agreement”) providing for the combination of MDC with the subsidiaries of Stagwell that own and operate a portfolio of marketing services companies (the “Stagwell Entities”). The combination and related transactions, including the domestication of MDC to a Delaware corporation, are referred to as the “Transactions.” See “Item 1. Business – Recent Developments” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, filed on March 16, 2021, for a description of the Transactions.

On May 7, 2021, MDC’s proxy statement/prospectus on Form S-4, as filed on April 30, 2021, which describes the Transaction Agreement, the Transactions, and related ancillary agreements in more detail, was declared effective by the SEC. MDC’s Board of Directors has scheduled a special meeting of shareholders on June 22, 2021 for the Company’s shareholders to vote on proposals to approve the Transactions and related matters.

On April 26, 2021, the Company acquired the remaining 40% ownership interest of Gale Partners it did not already own for an aggregate purchase price of approximately $20,000. The purchase price will be made in a combination of cash and MDC Class A Common Shares, of which approximately $12,000 is deferred with payments due in April 2022 and 2023. As part of the closing date purchase price, the Company issued 2,131,574 Class A Common Shares to the seller in a private placement in reliance on exemptions from registration under the Securities Act of 1933, as amended.

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Acquisitions and Dispositions

3 Months Ended

Mar. 31, 2021

Business Combinations [Abstract]

Acquisitions and Dispositions

Acquisitions and Dispositions

2020 Acquisition

On July 1, 2020, the Company acquired the remaining 10% ownership interest of Veritas it did not already own for an aggregate purchase price of $2,187, of which $1,087 was a deferred cash payment. As a result of the transaction, the Company reduced noncontrolling and redeemable noncontrolling interests by $2,651. The difference between the purchase price and the noncontrolling interest of $464 was recorded in Common stock and other paid-in capital in the Unaudited Condensed Consolidated Balance Sheets.

On March 19, 2020, the Company acquired the remaining 22.5% ownership interest of KWT Global it did not already own for an aggregate purchase price of $2,118, comprised of a closing cash payment of $729 and contingent deferred acquisition payments with an estimated present value at the acquisition date of $1,389. The contingent deferred payments were based on the financial results of the underlying business from 2019 to 2020 with final payment due in 2021. As a result of the transaction, the Company reduced redeemable noncontrolling interests by $1,615. The difference between the purchase price and the redeemable noncontrolling interest of $503 was recorded in Common stock and other paid-in capital in the Unaudited Condensed Consolidated Balance Sheets.

2020 Disposition

On February 14, 2020, the Company sold substantially all the assets and certain liabilities of Sloane and Company LLC (“Sloane”), an indirectly wholly owned subsidiary of the Company, to an affiliate of The Stagwell Group LLC (“Stagwell”), for an aggregate sale price of $26,696, consisting of cash received at closing plus contingent deferred payments expected to be paid over the next two years. The sale resulted in a gain of $16,827, which is included in Other, net within the Unaudited Condensed Consolidated Statements of Operations. Sloane was included within Allison & Partners which is included within the All Other category.

Deferred Acquisition Consideration

Deferred acquisition consideration on the balance sheet consists of deferred obligations related to contingent and fixed purchase price payments, and to a lesser extent, contingent and fixed retention payments tied to continued employment of specific personnel. Contingent deferred acquisition consideration is recorded at the acquisition date fair value and adjusted at each reporting period through operating income, for contingent purchase price payments, or net interest expense, for fixed purchase price payments. The Company accounts for certain retention payments through operating income as stock-based compensation over the required retention period.

The following table presents changes in contingent deferred acquisition consideration, which is measured at fair value on a recurring basis using significant unobservable inputs, and a reconciliation to the amounts reported on the balance sheets as of March 31, 2021 and December 31, 2020.

	March 31,		December 31,
	2021		2020
Beginning Balance of Contingent Payments	$	82,802	$	74,671
Payments	(1,153)		(46,792)
Redemption value adjustments (1)	12,392		44,993
Additions - Acquisitions and step-up transactions	—		7,703
Other	(641)		2,227
Ending balance of contingent payments	$	93,400	$	82,802
Fixed Payments	—		263
	$	93,400	$	83,065

(1) Redemption value adjustments are fair value changes from the Company’s initial estimates of deferred acquisition payments and stock-based compensation charges relating to acquisition payments that are tied to continued employment. Redemption value adjustments are recorded within Office and general expenses on the Unaudited Condensed Consolidated Statements of Operations.

The following table presents the impact to the Company’s Statements of operations due to the redemption value adjustments for the contingent deferred acquisition consideration:

	Three Months Ended March 31,
	2021		2020
Loss (income) attributable to fair value adjustments	$	11,685	$	(4,600)
Stock-based compensation	707		2,025
Redemption value adjustments	$	12,392	$	(2,575)

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Revenue

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

The Company’s revenue recognition policies are established in accordance with ASC 606, and accordingly, revenue is recognized when control of the promised goods or services is transferred to our clients, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services.

The MDC network provides an extensive range of services to our clients, offering a variety of marketing and communication capabilities including strategy, creative and production for advertising campaigns across a variety of platforms (print, digital, social media, television broadcast), public relations services including strategy, editorial, crisis support or issues management, media training, influencer engagement and events management. We also provide media buying and planning across a range of platforms (out-of-home, paid search, social media, lead generation, programmatic, television broadcast), experiential marketing and application/website design and development.

The primary source of the Company’s revenue is from agency arrangements in the form of fees for services performed, commissions, and from performance incentives or bonuses, depending on the terms of the client contract. In all circumstances, revenue is only recognized when collection is reasonably assured. Certain of the Company’s contractual arrangements have more than one performance obligation. For such arrangements, revenue is allocated to each performance obligation based on its relative stand-alone selling price. Stand-alone selling prices are determined based on the prices charged to clients or using expected cost plus margin.

The determination of our performance obligations is specific to the services included within each contract. Based on a client’s requirements within the contract, and how these services are provided, multiple services could represent separate performance obligations or be combined and considered one performance obligation. Contracts that contain services that are not significantly integrated or interdependent, and that do not significantly modify or customize each other, are considered separate performance obligations. Typically, we consider media planning, media buying, creative (or strategy), production and experiential marketing services to be separate performance obligations if included in the same contract as each of these services can be provided on a stand-alone basis, and do not significantly modify or customize each other. Public relations services and application/website design and development are typically each considered one performance obligation as there is a significant integration of these services into a combined output.

We typically satisfy our performance obligations over time, as services are performed. Fees for services are typically recognized using input methods (direct labor hours, materials and third-party costs) that correspond with efforts incurred to date in relation to total estimated efforts to complete the contract. Point in time recognition primarily relates to certain commission-based contracts, which are recognized upon the placement of advertisements in various media when the Company has no further performance obligation.                                            

Revenue is recognized net of sales and other taxes due to be collected and remitted to governmental authorities. The Company’s contracts typically provide for termination by either party within 30 to 90 days. Although payment terms vary by client, they are typically within 30 to 60 days. In addition, the Company generally has the right to payment for all services provided through the end of the contract or termination date.

Within each contract, we identify whether the Company is principal or agent at the performance obligation level. In arrangements where the Company has substantive control over the service before transferring it to the client, and is primarily responsible for integrating the services into the final deliverables, we act as principal. In these arrangements, revenue is recorded at the gross amount billed. Accordingly, for these contracts the Company has included reimbursed expenses in revenue. In other arrangements where a third-party supplier, rather than the Company, is primarily responsible for the integration of services into the final deliverables, and thus the Company is solely arranging for the third-party supplier to provide these services to our client, we generally act as agent and record revenue equal to the net amount retained, when the fee or commission is earned. The role of MDC’s agencies under a production services agreement is to facilitate a client’s purchasing of production capabilities from a third-party production company in accordance with the client’s strategy and guidelines. The obligation of MDC’s agencies under media buying services is to negotiate and purchase advertising media from a third-party media vendor on behalf of a client to execute its media plan. We do not obtain control prior to transferring these services to our clients; therefore, we primarily act as agent for production and media buying services.                                    

A small portion of the Company’s contractual arrangements with clients include performance incentive provisions, which allow the Company to earn additional revenues as a result of its performance relative to both quantitative and qualitative goals. Incentive compensation is primarily estimated using the most likely amount method and is included in revenue up to the amount that is not expected to result in a reversal of a significant amount of cumulative revenue recognized. We recognize revenue related to performance incentives as we satisfy the performance obligation to which the performance incentives are related.

Disaggregated Revenue Data

The Company provides a broad range of services to a large base of clients across the full spectrum of industry verticals globally. The primary source of revenue is from agency arrangements in the form of fees for services performed, commissions, and from performance incentives or bonuses. Certain clients may engage with the Company in various geographic locations, across multiple disciplines, and through multiple Partner Firms. Representation of a client rarely means that MDC handles marketing communications for all brands or product lines of the client in every geographical location. The Company’s Partner Firms often cooperate with one another through referrals and the sharing of both services and expertise, which enables MDC to service clients’ varied marketing needs by crafting custom integrated solutions. Additionally, the Company maintains separate, independent operating companies to enable it to effectively manage potential conflicts of interest by representing competing clients across the MDC network.

The following table presents revenue disaggregated by client industry vertical for the three months ended March 31, 2021 and 2020:

		Three Months Ended March 31,
Industry	Reportable Segment	2021		2020
Food & Beverage	All	$	55,178	$	58,091
Retail	All	30,777		36,303
Consumer Products	All	45,405		39,769
Communications	All	16,990		41,045
Automotive	All	15,629		25,192
Technology	All	46,390		25,535
Healthcare	All	31,494		24,066
Financials	All	24,442		24,005
Transportation and Travel/Lodging	All	9,948		20,486
Other	All	31,332		33,250
		$	307,585	$	327,742

MDC has historically largely focused where the Company was founded in North America, the largest market for its services in the world. The Company has expanded its global footprint to support clients looking for help to grow their businesses in new markets. MDC’s Partner Firms are located in the United States, Canada, and an additional eleven countries around the world. In the past, some clients have responded to weakening economic conditions with reductions to their marketing budgets, which included discretionary components that are easier to reduce in the short term than other operating expenses.

The following table presents revenue disaggregated by geography for the three months ended March 31, 2021 and 2020:

		Three Months Ended March 31,
Geographical Location	Reportable Segment	2021	2020
United States	All	$242,580	$264,561
Canada	All	22,650	18,256
Other	All	42,355	44,925
		$307,585	$327,742

Contract Assets and Liabilities

Contract assets consist of fees and reimbursable outside vendor costs incurred on behalf of clients when providing advertising, marketing and corporate communications services that have not yet been invoiced to clients. Unbilled service fees were $59,143 and $49,110 at March 31, 2021 and December 31, 2020, respectively, and are included as a component of Accounts receivable on the Unaudited Condensed Consolidated Balance Sheets. Outside vendor costs incurred on behalf of clients which have yet to be invoiced were $22,824 and $10,552 at March 31, 2021 and December 31, 2020, respectively, and are included on the Unaudited Condensed Consolidated Balance Sheets as Expenditures billable to clients. Such amounts are invoiced to clients at various times over the course of providing services.

Contract liabilities consist of fees billed to clients in excess of fees recognized as revenue and are classified as Advance billings and included within Accruals and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets. In arrangements in which we are acting as an agent, the revenue recognition related to the contract liability is presented on a net basis within the Unaudited Condensed Consolidated Statements of Operations. Advance billings at March 31, 2021 and December 31, 2020 were $170,159 and $152,956, respectively. The increase in the Advance billings balance of $17,203 for the three months ended March 31, 2021 was primarily driven by cash payments received or due in advance of satisfying our performance obligations, offset by $99,188 of revenues recognized that were included in the Advance billings balances as of December 31, 2020 and reductions due to the incurrence of third-party costs. Contract liabilities classified within Accruals and other liabilities at March 31, 2021 and December 31, 2020 were $97,075 and $112,755, respectively. The decrease in the balance of $15,680 for the three months ended March 31, 2021 was primarily driven by cash payments received or due in advance of satisfying our performance obligations, offset by $69,699 of revenues recognized that were included in the balance as of December 31, 2020 and reductions due to the incurrence of third-party costs.

Changes in the contract asset and liability balances during the three months ended March 31, 2021 were not materially impacted by write offs, impairment losses or any other factors.

The majority of our contracts are for periods of one year or less. For those contracts with a term of more than one year, we had approximately $5,799 of unsatisfied performance obligations as of March 31, 2021, of which we expect to recognize approximately 83% in 2021 and 17% in 2022.

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Income (Loss) Per Common Share

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Loss Per Common Share

Income (Loss) Per Common Share

The following table sets forth the computation of basic and diluted income (loss) per common share:

	Three Months Ended March 31,
	2021		2020
Numerator:
Net income attributable to MDC Partners Inc.	$	5,010	$	1,002
Accretion on convertible preference shares	(3,724)		(3,440)
Net income allocated to convertible preference shares	(365)		—
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	921	$	(2,438)
Adjustment to net income allocated to convertible preference shares	7		—
Net income (loss) attributable to MDC Partners Inc. common shareholders - Diluted	$	928	$	(2,438)
Denominator:
Basic weighted average number of common shares outstanding	73,392,824		72,397,661
Diluted weighted average number of common shares outstanding	75,439,066		72,397,661
Basic	$	0.01	$	(0.03)
Diluted	$	0.01	$	(0.03)

Anti-dilutive stock awards 1,920,634     2,835,770

Restricted stock and restricted stock unit awards of 0 and 2,203,717 as of March 31, 2021 and 2020, respectively, are excluded from the computation of diluted income (loss) per common share because the performance contingency necessary for vesting has not been met as of the reporting date. In addition, there were 145,000 Preference Shares outstanding which were convertible into 29,430,693 and 27,189,411 Class A common shares at March 31, 2021 and 2020, respectively. These Preference Shares were anti-dilutive for each period presented in the table above and are therefore excluded from the diluted income (loss) per common share calculation.

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Deferred Acquisition Consideration

3 Months Ended

Mar. 31, 2021

Business Combinations [Abstract]

Deferred Acquisition Consideration

Acquisitions and Dispositions

2020 Acquisition

On July 1, 2020, the Company acquired the remaining 10% ownership interest of Veritas it did not already own for an aggregate purchase price of $2,187, of which $1,087 was a deferred cash payment. As a result of the transaction, the Company reduced noncontrolling and redeemable noncontrolling interests by $2,651. The difference between the purchase price and the noncontrolling interest of $464 was recorded in Common stock and other paid-in capital in the Unaudited Condensed Consolidated Balance Sheets.

On March 19, 2020, the Company acquired the remaining 22.5% ownership interest of KWT Global it did not already own for an aggregate purchase price of $2,118, comprised of a closing cash payment of $729 and contingent deferred acquisition payments with an estimated present value at the acquisition date of $1,389. The contingent deferred payments were based on the financial results of the underlying business from 2019 to 2020 with final payment due in 2021. As a result of the transaction, the Company reduced redeemable noncontrolling interests by $1,615. The difference between the purchase price and the redeemable noncontrolling interest of $503 was recorded in Common stock and other paid-in capital in the Unaudited Condensed Consolidated Balance Sheets.

2020 Disposition

On February 14, 2020, the Company sold substantially all the assets and certain liabilities of Sloane and Company LLC (“Sloane”), an indirectly wholly owned subsidiary of the Company, to an affiliate of The Stagwell Group LLC (“Stagwell”), for an aggregate sale price of $26,696, consisting of cash received at closing plus contingent deferred payments expected to be paid over the next two years. The sale resulted in a gain of $16,827, which is included in Other, net within the Unaudited Condensed Consolidated Statements of Operations. Sloane was included within Allison & Partners which is included within the All Other category.

Deferred Acquisition Consideration

Deferred acquisition consideration on the balance sheet consists of deferred obligations related to contingent and fixed purchase price payments, and to a lesser extent, contingent and fixed retention payments tied to continued employment of specific personnel. Contingent deferred acquisition consideration is recorded at the acquisition date fair value and adjusted at each reporting period through operating income, for contingent purchase price payments, or net interest expense, for fixed purchase price payments. The Company accounts for certain retention payments through operating income as stock-based compensation over the required retention period.

The following table presents changes in contingent deferred acquisition consideration, which is measured at fair value on a recurring basis using significant unobservable inputs, and a reconciliation to the amounts reported on the balance sheets as of March 31, 2021 and December 31, 2020.

	March 31,		December 31,
	2021		2020
Beginning Balance of Contingent Payments	$	82,802	$	74,671
Payments	(1,153)		(46,792)
Redemption value adjustments (1)	12,392		44,993
Additions - Acquisitions and step-up transactions	—		7,703
Other	(641)		2,227
Ending balance of contingent payments	$	93,400	$	82,802
Fixed Payments	—		263
	$	93,400	$	83,065

(1) Redemption value adjustments are fair value changes from the Company’s initial estimates of deferred acquisition payments and stock-based compensation charges relating to acquisition payments that are tied to continued employment. Redemption value adjustments are recorded within Office and general expenses on the Unaudited Condensed Consolidated Statements of Operations.

The following table presents the impact to the Company’s Statements of operations due to the redemption value adjustments for the contingent deferred acquisition consideration:

	Three Months Ended March 31,
	2021		2020
Loss (income) attributable to fair value adjustments	$	11,685	$	(4,600)
Stock-based compensation	707		2,025
Redemption value adjustments	$	12,392	$	(2,575)

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Leases

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Leases

Leases

The Company leases office space in North America, Europe, Asia, South America, and Australia. This space is primarily used for office and administrative purposes by the Company’s employees in performing professional services. These leases are classified as operating leases and expire between years 2021 through 2033. The Company’s finance leases are immaterial.

The Company’s leasing policies are established in accordance with ASC 842, and accordingly, the Company recognizes on the balance sheet at the time of lease commencement a right-of-use lease asset and a lease liability, initially measured at the present value of the lease payments. Right-of-use lease assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. All right-of-use lease assets are reviewed for impairment. As the Company’s implicit rate in its leases is not readily determinable, in determining the present value of lease payments, the Company uses its incremental borrowing rate based on the information available at the commencement date. Lease payments included in the measurement of the lease liability are comprised of noncancelable lease payments, payments based upon an index or rate, payments for optional renewal periods where it is reasonably certain the renewal period will be exercised, and payments for early termination options unless it is reasonably certain the lease will not be terminated early.

Lease costs are recognized in the Unaudited Condensed Consolidated Statements of Operations over the lease term on a straight-line basis. Leasehold improvements are depreciated on a straight-line basis over the lesser of the term of the related lease or the estimated useful life of the asset. 

Some of the Company’s leases contain variable lease payments, including payments based upon an index or rate. Variable lease payments based upon an index or rate are initially measured using the index or rate in effect at the lease commencement date and are included within the lease liabilities. Lease liabilities are not remeasured as a result of changes in the index or rate, rather changes in these types of payments are recognized in the period in which the obligation for those payments is incurred. In addition, some of our leases contain variable payments for utilities, insurance, real estate tax, repairs and maintenance, and other variable operating expenses. Such amounts are not included in the measurement of the lease liability and are recognized in the period when the facts and circumstances which the variable lease payments are based upon occur.

Some of the Company’s leases include options to extend or renew the leases through 2040. The renewal and extension options are not included in the lease term as the Company is not reasonably certain that it will exercise its option.

From time to time, the Company enters into sublease arrangements both with unrelated third-parties and with our partner agencies. These leases are classified as operating leases and expire between years 2021 through 2027. Sublease income is

recognized over the lease term on a straight-line basis. Currently, the Company subleases office space in North America, Asia, Europe and Australia.

As of March 31, 2021, the Company has entered into five operating leases for which the commencement date has not yet occurred as the premises are in the process of being prepared for occupancy by the landlord. Accordingly, these five leases represent an obligation of the Company that is not reflected within the Unaudited Condensed Consolidated Balance Sheets as of March 31, 2021. The aggregate future liability related to these leases is approximately $34,020.

The discount rate used for leases accounted for under ASC 842 is the Company’s collateralized credit adjusted borrowing rate.

The following table presents lease costs and other quantitative information for the three months ended March 31, 2021 and 2020:

	Three Months Ended March 31,
	2021		2020
Lease Cost:
Operating lease cost	$	17,127	$	16,391
Variable lease cost	2,593		4,655
Sublease rental income	(2,564)		(2,805)
Total lease cost	$	17,156	$	18,241
Additional information:
Cash paid for amounts included in the measurement of lease liabilities for operating leases
Operating cash flows	$	16,796	$	17,635
Right-of-use lease assets obtained in exchange for operating lease liabilities and other non-cash adjustments	$	3,816	$	7,119
Weighted average remaining lease term (in years) - Operating leases	7.2		7.0
Weighted average discount rate - Operating leases	10.6		8.7

In the three months ended March 31, 2021, the Company recorded a charge of $875 to reduce the carrying value of two of its right-of-use lease assets and accelerate the operating expenses of one of its right-of-use lease assets. These right-of-use lease assets related to three agencies within its Integrated Networks - Group B reportable segment. The Company evaluated the facts and circumstances related to the use of the assets which indicated that they may not be recoverable. Using adjusted quoted market prices to develop expected future cash flows, it was determined that the fair value of the assets were less than their carrying value. This impairment charge is included in Impairment and other losses within the Unaudited Condensed Consolidated Statements of Operations.

In the three months ended March 31, 2020, the Company recorded an impairment charge of $161 to reduce the carrying value of one of its right-of-use lease assets.

Operating lease expense is included in office and general expenses in the Unaudited Condensed Consolidated Statements of Operations. The Company’s lease expense for leases with a term of 12 months or less is immaterial.

The following table presents minimum future rental payments under the Company’s leases at March 31, 2021 and their reconciliation to the corresponding lease liabilities:

	Maturity Analysis
Remaining 2021	$52,871
2022	61,447
2023	56,839
2024	50,615
2025	39,582
2026 and thereafter	152,702
Total	414,056
Less: Present value discount	(131,452)
Lease liability	$	282,604

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Debt

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Debt

Debt

As of March 31, 2021 and December 31, 2020, the Company’s indebtedness was comprised as follows:

	March 31, 2021		December 31, 2020
Revolving Credit Agreements	$	20,000	$	—
Senior Notes	870,256		870,256
Debt Issuance Cost	(25,406)		(27,072)
	$	864,850	$	843,184

Senior Notes

On March 23, 2016, MDC entered into an indenture (the “Indenture”) among MDC, its existing and future restricted subsidiaries that guarantee, are co-borrowers under, or grant liens to secure, the Credit Agreement (as defined below), as guarantors (the “Guarantors”) and The Bank of New York Mellon, as trustee, relating to the issuance by MDC of $900,000 aggregate principal amount of the senior notes due 2024 (the “Senior Notes”). The Senior Notes were sold in a private placement in reliance on exemptions from registration under the Securities Act of 1933. The Senior Notes bear interest, payable semiannually in arrears on May 1 and November 1, at a rate of 7.50% per annum. The Senior Notes mature on May 1, 2024, unless earlier redeemed or repurchased.

The Senior Notes are guaranteed on a senior unsecured basis by all of MDC’s existing and future restricted subsidiaries that guarantee, are co-borrowers under, or grant liens to secure, the Credit Agreement. The Senior Notes are unsecured and unsubordinated obligations of MDC and rank (i) equally in right of payment with all of MDC’s or any Guarantor’s existing and future senior indebtedness, (ii) senior in right of payment to MDC’s or any Guarantor’s existing and future subordinated indebtedness, (iii) effectively subordinated to all of MDC’s or any Guarantor’s existing and future secured indebtedness to the extent of the collateral securing such indebtedness, including the Credit Agreement, and (iv) structurally subordinated to all existing and future liabilities of MDC’s subsidiaries that are not Guarantors.

MDC may, at its option, redeem the Senior Notes in whole at any time or in part from time to time, at varying prices based on the timing of the redemption.

If MDC experiences certain kinds of changes of control (as defined in the Indenture), holders of the Senior Notes may require MDC to repurchase any Senior Notes held by them at a price equal to 101% of the principal amount of the Senior Notes plus accrued and unpaid interest. In addition, if MDC sells assets under certain circumstances, it must apply the proceeds from such sale and offer to repurchase the Senior Notes at a price equal to 100% of the principal amount plus accrued and unpaid interest.

The Indenture includes covenants that, among other things, restrict MDC’s ability and the ability of its restricted subsidiaries (as defined in the Indenture) to incur or guarantee additional indebtedness; pay dividends on or redeem or repurchase the capital stock of MDC; make certain types of investments; create restrictions on the payment of dividends or other amounts from MDC’s restricted subsidiaries; sell assets; enter into transactions with affiliates; create liens; enter into sale and leaseback transactions; and consolidate or merge with or into, or sell substantially all of MDC’s assets to, another person. These covenants are subject to a number of important limitations and exceptions. The Senior Notes are also subject to customary events of default, including a cross-payment default and cross-acceleration provision. The Company was in compliance with all covenants at March 31, 2021.

Revolving Credit Agreement

The Company is party to a $211,500 secured revolving credit facility due February 3, 2022. The Company had $20,000 outstanding under the revolving credit facility as of March 31, 2021.

Advances under the Credit Agreement bear interest as follows: (i) Non-Prime Rate Loans bear interest at the Non-Prime Rate plus the Non-Prime Rate Margin and (ii) all other Obligations bear interest at the Prime Rate, plus the Prime Rate Margin. The Non-Prime Rate Margin and Prime Rate Margin will range from 2.50% to 3.00% for Non-Prime Rate Loans and from 1.75% to 2.25% for Prime Rate Loans. In addition to paying interest on outstanding principal under the Credit Agreement, MDC is required to pay an unused revolver fee to lenders under the Credit Agreement in respect of unused commitments thereunder.

The Credit Agreement, which includes financial and non-financial covenants, is guaranteed by substantially all of MDC’s present and future subsidiaries, other than immaterial subsidiaries and subject to customary exceptions, and collateralized by a portion of MDC’s outstanding receivable balance. The Company was in compliance with all of the terms and conditions of its Credit Agreement as of March 31, 2021.

At March 31, 2021 and December 31, 2020, the Company had issued undrawn outstanding letters of credit of $19,151 and $18,651, respectively.

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Noncontrolling and Redeemable Noncontrolling Interests

3 Months Ended

Mar. 31, 2021

Noncontrolling Interest [Abstract]

Noncontrolling and Redeemable Noncontrolling Interests

Noncontrolling and Redeemable Noncontrolling Interests

When acquiring less than 100% ownership of an entity, the Company may enter into agreements that give the Company an option to purchase, or require the Company to purchase, the incremental ownership interests under certain circumstances. Where the option to purchase the incremental ownership is within the Company’s control, the amounts are recorded as noncontrolling interests in the equity section of the Company’s Unaudited Condensed Consolidated Balance Sheets. Where the incremental purchase may be required of the Company, the amounts are recorded as redeemable noncontrolling interests in mezzanine equity at their estimated acquisition date redemption value and adjusted at each reporting period for changes to their estimated redemption value through additional paid-in capital (but not less than their initial redemption value), except for foreign currency translation adjustments. On occasion, the Company may initiate a renegotiation to acquire an incremental ownership interest and the amount of consideration paid may differ materially from the amounts recorded in the Company’s Unaudited Condensed Consolidated Balance Sheets.

Noncontrolling Interests

Changes in amounts due to noncontrolling interest holders included in Accruals and other liabilities on the Unaudited Condensed Consolidated Balance Sheets for the year ended December 31, 2020 and three months ended March 31, 2021 were as follows:

	Noncontrolling Interests
Balance at December 31, 2019	$	14,028
Income attributable to noncontrolling interests	21,774
Distributions made	(15,192)
Other	94
Balance at December 31, 2020	$	20,704
Income attributable to noncontrolling interests	4,491
Distributions made	(5,285)
Other	36
Balance at March 31, 2021	$	19,946

Changes in the Company’s ownership interests in our less than 100% owned subsidiaries during the three months ended March 31, 2021 and 2020 were as follows:

	Three Months Ended March 31,
	2021		2020
Net income attributable to MDC Partners Inc.	$	5,010	$	1,002
Transfers from the noncontrolling interest:
Decrease in MDC Partners Inc. paid-in capital for purchase of redeemable noncontrolling interests and noncontrolling interests	(330)		(503)
Net transfers from noncontrolling interests	$	(330)	$	(503)
Change from Net income attributable to MDC Partners Inc. and transfers to noncontrolling interests	$	4,680	$	499

Redeemable Noncontrolling Interests

The following table presents changes in redeemable noncontrolling interests:

	Three Months Ended March 31, 2021		Year Ended December 31, 2020
Beginning Balance	$	27,137	$	36,973
Redemptions	—		(12,289)
Granted	—		—
Changes in redemption value	(1,681)		2,800
Currency translation adjustments	(104)		(347)
Ending Balance	$	25,352	$	27,137

The noncontrolling shareholders’ ability to exercise any such option right is subject to the satisfaction of certain conditions, including conditions requiring notice in advance of exercise and specific employment termination conditions. In addition, these rights cannot be exercised prior to specified staggered exercise dates. The exercise of these rights at their earliest contractual date would result in obligations of the Company to fund the related amounts during 2021 to 2025. It is not determinable, at this time, if or when the owners of these rights will exercise all or a portion of these rights.

The redeemable noncontrolling interest of $25,352 as of March 31, 2021, consists of $16,469 assuming that the subsidiaries perform over the relevant future periods at their discounted cash flows earnings level and such rights are exercised, $8,883 upon termination of such owner’s employment with the applicable subsidiary or death and $0 representing the initial redemption value (required floor) recorded for certain acquisitions in excess of the amount the Company would have to pay should the Company acquire the remaining ownership interests for such subsidiaries.

These adjustments will not impact the calculation of earnings (loss) per share if the redemption values are less than the estimated fair values. There is no related impact on the Company’s income per share calculations.

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Commitments, Contingencies and Guarantees

3 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments, Contingencies and Guarantees

Commitments, Contingencies, and Guarantees

Legal Proceedings. The Company’s operating entities are involved in legal proceedings of various types. While any litigation contains an element of uncertainty, the Company has no reason to believe that the outcome of such proceedings or claims will have a material adverse effect on the financial condition or results of operations of the Company.

Deferred Acquisition Consideration and Options to Purchase. See Notes 5 and 8 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for information regarding potential payments associated with deferred acquisition consideration and the acquisition of noncontrolling shareholders’ ownership interest in subsidiaries.

Natural Disasters. Certain of the Company’s operations are located in regions of the United States which typically are subject to hurricanes. During the three months ended March 31, 2021 and 2020, these operations did not incur any material costs related to damages resulting from hurricanes.

Guarantees. Generally, the Company has indemnified the purchasers of certain assets in the event that a third party asserts a claim against the purchaser that relates to a liability retained by the Company. These types of indemnification guarantees typically extend for a number of years. Historically, the Company has not made any significant indemnification payments under such agreements and no amount has been accrued in the accompanying consolidated financial statements with respect to these indemnification guarantees. The Company continues to monitor the conditions that are subject to guarantees and indemnifications to identify whether it is probable that a loss has occurred and would recognize any such losses under any guarantees or indemnifications in the period when those losses are probable and estimable.

Commitments.  At March 31, 2021, the Company had $19,151 of undrawn letters of credit.

The Company entered into operating leases for which the commencement date has not yet occurred as of March 31, 2021. See Note 6 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for additional information.

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Share Capital

3 Months Ended

Mar. 31, 2021

Share Capital [Abstract]

Share Capital

Share Capital

The authorized and outstanding share capital of the Company is as follows:

Series 6 Convertible Preference Shares

On March 14, 2019 (the “Series 6 Issue Date”), the Company entered into a securities purchase agreement with Stagwell Agency Holdings LLC (“Stagwell Holdings”), an affiliate of Stagwell, pursuant to which Stagwell Holdings agreed to purchase (i) 14,285,714 newly authorized Class A shares (the “Stagwell Class A Shares”) for an aggregate contractual purchase price of $50,000 and (ii) 50,000 newly authorized Series 6 convertible preference shares (“Series 6 Preference Shares”) for an aggregate contractual purchase price of $50,000. The Company received proceeds of approximately $98,620 net of fees and estimated expenses, which were primarily used to pay down existing debt under the Company’s credit facility and for general corporate purposes. The proceeds allocated to the Stagwell Class A Shares were $35,997 and to Series 6 Preference Shares were $62,623 based on their relative fair value calculated by utilizing a Monte Carlo Simulation model. In connection with the closing of the transaction, the Company increased the size of its Board and appointed two nominees designated by Stagwell Holdings. Except as required by law, the Series 6 Preference Shares do not have voting rights and are not redeemable at the option of Stagwell Holdings.

The holders of the Series 6 Preference Shares have the right to convert their Series 6 Preference Shares in whole at any time and from time to time, and in part at any time and from time to time, into a number of Class A Shares equal to the then-applicable liquidation preference divided by the applicable conversion price at such time (the “Conversion Price”). The initial liquidation preference per share of each Series 6 Preference Share is $1,000. The initial Conversion Price is $5.00 per Series 6 Preference Share, subject to customary adjustments for share splits and combinations, dividends, recapitalizations and other matters, including weighted average anti-dilution protection for certain issuances of equity or equity-linked securities.

The Series 6 Preference Shares’ liquidation preference accretes at 8.0% per annum, compounded quarterly until the five-year anniversary of the Series 6 Issue Date. During the three months ended March 31, 2021, the Series 6 Preference Shares accreted at a monthly rate of 7.69, for total accretion of $1,153, bringing the aggregate liquidation preference to $58,804 as of March 31, 2021. The accretion is considered in the calculation of net income (loss) attributable to MDC Partners Inc. common shareholders. See Note 4 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for further information regarding the Series 6 Preference Shares.

Holders of the Series 6 Preference Shares are entitled to dividends in an amount equal to any dividends that would otherwise have been payable on the Class A Shares issued upon conversion of the Series 6 Preference Shares. The Series 6 Preference Shares are convertible at the Company’s option (i) on and after the two-year anniversary of the Series 6 Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least 125% of the Conversion

Price or (ii) after the fifth anniversary of the Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least equal to the Conversion Price.

Following certain change in control transactions of the Company in which holders of Series 6 Preference Shares are not entitled to receive cash or qualifying listed securities with a value at least equal to the liquidation preference plus accrued and unpaid dividends, (i) holders will be entitled to cash dividends on the liquidation preference at an increasing rate (beginning at 7%), and (ii) the Company will have a right to redeem the Series 6 Preference Shares for cash at the greater of their liquidation preference plus accrued and unpaid dividends or their as-converted value.

Series 4 Convertible Preference Shares

On March 7, 2017 (the “Series 4 Issue Date”), the Company issued 95,000 newly created Preference Shares (“Series 4 Preference Shares”) to affiliates of The Goldman Sachs Group, Inc. (collectively, the “Purchaser”) pursuant to a $95,000 private placement. The Company received proceeds of approximately $90,123, net of fees and estimated expenses, which were primarily used to pay down existing debt under the Company’s credit facility and for general corporate purposes. In connection with the closing of the transaction, the Company increased the size of its Board and appointed one nominee designated by the Purchaser. Except as required by law, the Series 4 Preference Shares do not have voting rights and are not redeemable at the option of the Purchaser.

Subsequent to the ninetieth day following the Series 4 Issue Date, the holders of the Series 4 Preference Shares have the right to convert their Series 4 Preference Shares in whole at any time and from time to time and in part at any time and from time to time into a number of Class A Shares equal to the then-applicable liquidation preference divided by the applicable conversion price at such time (the “Conversion Price”). The initial liquidation preference per share of each Series 4 Preference Share is $1,000. The Conversion Price of a Series 4 Preference Share is subject to customary adjustments for share splits and combinations, dividends, recapitalizations and other matters, including weighted average anti-dilution protection for certain issuances of equity or equity-linked securities. In connection with the anti-dilution protection provision triggered by the issuance of equity securities to Stagwell Holdings, the Conversion Price per Series 4 Preference Share was reduced to $7.42 from the initial Conversion Price of $10.00.

The Series 4 Preference Shares’ liquidation preference accretes at 8.0% per annum, compounded quarterly until the five-year anniversary of the Series 4 Issue Date. During the three months ended March 31, 2021, the Series 4 Preference Shares accreted at a monthly rate of approximately $9.02 per Series 4 Preference Share, for total accretion of $2,571, bringing the aggregate liquidation preference to $131,110 as of March 31, 2021. The accretion is considered in the calculation of net income (loss) attributable to MDC Partners Inc. common shareholders. See Note 4 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for further information regarding the Series 4 Preference Shares.

Holders of the Series 4 Preference Shares are entitled to dividends in an amount equal to any dividends that would otherwise have been payable on the Class A Shares issued upon conversion of the Series 4 Preference Shares. The Series 4 Preference Shares are convertible at the Company’s option (i) on and after the two-year anniversary of the Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least 125% of the Conversion Price or (ii) after the fifth anniversary of the Series 4 Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least equal to the Conversion Price.

Following certain change in control transactions of the Company in which holders of Series 4 Preference Shares are not entitled to receive cash or qualifying listed securities with a value at least equal to the liquidation preference plus accrued and unpaid dividends, (i) holders will be entitled to cash dividends on the liquidation preference at an increasing rate (beginning at 7%), and (ii) the Company will have a right to redeem the Series 4 Preference Shares for cash at the greater of their liquidation preference plus accrued and unpaid dividends or their as-converted value.

Class A Common Shares (“Class A Shares”)

These are an unlimited number of subordinate voting shares, carrying one vote each, with a par value of $0, entitled to dividends equal to or greater than Class B Shares, convertible at the option of the holder into one Class B Share for each Class A Share after the occurrence of certain events related to an offer to purchase all Class B shares. There were 74,787,317 and 73,529,105 Class A Shares issued and outstanding as of March 31, 2021 and December 31, 2020, respectively.

Class B Common Shares (“Class B Shares”)

These are an unlimited number of voting shares, carrying twenty votes each, with a par value of $0, convertible at any time at the option of the holder into one Class A share for each Class B share. There were 3,743 and 3,743 Class B Shares issued and outstanding as of March 31, 2021 and December 31, 2020, respectively.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

A fair value measurement assumes a transaction to sell an asset or transfer a liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability.

In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as considers counterparty credit risk in its assessment of fair value. The hierarchy for observable and unobservable inputs used to measure fair value into three broad levels are described below: 

•Level 1 - Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.

•Level 2 - Observable prices that are based on inputs not quoted on active markets, but corroborated by market data.

•Level 3 - Unobservable inputs are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs.

Financial Liabilities that are not Measured at Fair Value on a Recurring Basis

The following table presents certain information for our financial liability that is not measured at fair value on a recurring basis at March 31, 2021 and December 31, 2020:

	March 31, 2021				December 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Liabilities:
Senior Notes	$	870,256	$	882,379	$	870,256	$	883,580

Our long-term debt includes fixed rate debt. The fair value of this instrument is based on quoted market prices in markets that are not active. Therefore, this debt is classified as Level 2 within the fair value hierarchy.

Financial Liabilities Measured at Fair Value on a Recurring Basis

Contingent deferred acquisition consideration (Level 3 fair value measurement) is recorded at the acquisition date fair value and adjusted at each reporting period. The estimated liability is determined in accordance with various contractual valuation formulas and is dependent upon significant assumptions, such as the growth rate of the earnings of the relevant subsidiary during the contractual period and the discount rate. These growth rates are consistent with the Company’s long-term forecasts. As of March 31, 2021, the discount rate used to measure these liabilities was 5.1%.

As these estimates require the use of assumptions about future performance, which are uncertain at the time of estimation, the fair value measurements presented on the Unaudited Condensed Consolidated Balance Sheets are subject to material uncertainty.

See Note 5 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for additional information regarding contingent deferred acquisition consideration.

At March 31, 2021 and December 31, 2020, the carrying amount of the Company’s financial instruments, including cash and cash equivalents, accounts receivable and accounts payable, approximated fair value because of their short-term maturity.

Non-financial Assets and Liabilities that are Measured at Fair Value on a Nonrecurring Basis

Certain non-financial assets are measured at fair value on a nonrecurring basis, primarily goodwill, intangible assets (Level 3 fair value measurement) and right-of-use lease assets (Level 2 fair value measurement). Accordingly, these assets are not measured and adjusted to fair value on an ongoing basis but are subject to periodic evaluations for potential impairment. The Company did not recognize an impairment of goodwill or intangible assets in the three months ended March 31, 2021. The company did not recognize an impairment of goodwill or intangible assets in the three months ended March 31, 2020.

The Company recognized a charge of $598 to reduce the carrying value of its right-of-use lease assets in the three months ended March 31, 2021. The company recognized an impairment charge of $161 to reduce the carrying value of one of its right-of-use lease assets in the three months ended March 31, 2020. See Note 6 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for further information.

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Supplemental Information

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Information

Supplemental Information

Impairment and Other Losses

The Company recognized a charge of $875 for the three months ended March 31, 2021 to reduce the carrying value of two of its right-of-use lease assets and accelerate the operating expenses of one of its right-of-use lease assets. These right-of-use lease assets related to three agencies within its Integrated Networks - Group B reportable segment.

See Note 6 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for additional information regarding the impairment of right-of-use lease assets and losses.

Income Taxes

Our tax provision for interim periods is determined using an estimated annual effective tax rate, adjusted for discrete items arising in interim periods.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. The CARES Act includes provisions relating to delaying certain payroll tax payments, refundable payroll tax credits, net operating loss carryback periods, modifications to the net interest deduction limitations and technical corrections to the tax depreciation methods for qualified improvement property. The tax law changes in the CARES Act did not have a material impact on the Company’s income tax provision.

The Company had an income tax expense for the three months ended March 31, 2021 of $1,302 (on a pre-tax income of $11,296 resulting in an effective tax rate of 11.5%) compared to income tax expense of $13,500 (on pre-tax income of $15,293 resulting in an effective tax rate of 88.3%) for the three months ended March 31, 2020.

         The effective tax rate of 11.5% for the three months ended March 31, 2021 was primarily due to minimal tax expense recognized on U.S. earnings as a result of being subject to a valuation allowance.

The effective tax rate of 88.3% for the three months ended March 31, 2020 was primarily driven by capital gains, non-deductible stock compensation for which a tax benefit was not recognized, and the jurisdictional mix of earnings.

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Related Party Transactions

3 Months Ended

Mar. 31, 2021

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

In the ordinary course of business, the Company enters into transactions with related parties, including Stagwell and its affiliates. The transactions may range in the nature and value of services underlying the arrangements. Below are the related party transactions that are significant in nature:

In October 2019, a Partner Firm of the Company entered into an arrangement with a Stagwell affiliate, in which the Stagwell affiliate and the Partner Firm collaborated to provide various services to a client of the Partner Firm. The Partner Firm and the Stagwell affiliate pitched and won this business together, with the client ultimately determining the general scope of work for each agency. Under the arrangement, which was structured as a sub-contract due to client preference, the Partner Firm is expected to pay the Stagwell affiliate, for services provided by the Stagwell affiliate in connection with serving the client, approximately $2,000 which has been fully recognized through March 31, 2021. As of March 31, 2021, $101 was owed to the affiliate.

In January 2021, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform media planning, buying and reporting services. Under the arrangement, the Partner Firm is expected to receive from the Stagwell affiliate approximately $529, which have been fully recognized through March 2021. As of March 31, 2021, $0 was due from the affiliate. 

In May 2020, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform programmatic media planning, buying and reporting services. Under the arrangement, the Partner Firm is expected to receive from the Stagwell affiliate approximately $2,397, which is expected to be fully recognized in May 2021. As of March 31, 2021, $0 was due from the affiliate. 

In November 2020, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform Event Management Services. Under the arrangement, the Partner Firm is expected to receive from the Stagwell affiliate approximately $456, which has been fully recognized as of March of 2021. As of March 31, 2021, $316 was due from the affiliate.

In February 2021, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform requirements gathering and concept features for a future-leaning ad platform for the augmented reality space. Under the arrangement, the Stagwell affiliate is expected to receive from the Partner Firm approximately $140, which will be recognized through April 2021. As of March 31, 2021, $140 was due to the affiliate.

In March 2021, a Partner Firm of the Company entered into an arrangement with a certain Stagwell affiliate to perform media relations support and outreach services. Under the arrangement, the Partner Firm is expected to receive from the Stagwell affiliate approximately $190, which will be recognized through September 2022. As of March 31, 2021, $10 was due from the affiliate.

The Company entered into an agreement commencing on January 1, 2020 to sublease office space through July 2021 to a company whose chairman is a member of the Company’s Board of Directors. As of March 31, 2021, the total future rental income related to the sublease is approximately $65.

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Segment Information

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company determines an operating segment if a component (i) engages in business activities from which it earns revenues and incurs expenses, (ii) has discrete financial information, and is (iii) regularly reviewed by the Chief Operating Decision Maker (“CODM”), who is Mark Penn, Chief Executive Officer and Chairman, to make decisions regarding resource allocation for the segment and assess its performance. Once operating segments are identified, the Company performs an analysis to determine if aggregation of operating segments is applicable. This determination is based upon a quantitative analysis of the expected and historic average long-term profitability for each operating segment, together with a qualitative assessment to determine if operating segments have similar operating characteristics.

The CODM uses Adjusted EBITDA (defined below) as a key metric, to evaluate the operating and financial performance of a segment, identify trends affecting the segments, develop projections and make strategic business decisions. Adjusted EBITDA is defined as Net income (loss) attributable to MDC Partners Inc. common shareholders’ plus or minus non-operating items to operating income (loss), plus depreciation and amortization, stock-based compensation, deferred acquisition consideration adjustments, distributions from non-consolidated affiliates and other items, net. Distributions from non-consolidated affiliates includes (i) cash received for profit distributions from non-consolidated affiliates, and (ii) consideration from the sale of ownership interests in non-consolidated affiliates, less contributions to date, plus undistributed earnings (losses). Other items, net includes items such as merger related costs, severance and other restructuring expenses, including costs for leases that will either be terminated or sublet in connection with the centralization of our New York real estate portfolio.

The three reportable segments that result from applying the aggregation criteria are as follows: “Integrated Networks - Group A,” “Integrated Networks - Group B” and the “Media & Data Network.” In addition, the Company combines and discloses operating segments that do not meet the aggregation criteria as “All Other.” The Company also reports corporate expenses, as further detailed below, as “Corporate.” All segments follow the same basis of presentation and accounting policies as those described throughout the Notes to the Unaudited Condensed Consolidated Financial Statements included herein and Note 2 of the Company’s 2020 Form 10-K.

•The Integrated Networks - Group A reportable segment is comprised of the Anomaly Alliance (Anomaly, Concentric Partners, Hunter, Mono, Y Media Labs) and Colle McVoy operating segments.

•The Integrated Networks - Group B reportable segment is comprised of the Constellation (72andSunny, CPB, Instrument and Redscout) and Doner Partner Network (6degrees, Doner, KWT, Union, Veritas and Yamamoto) operating segments.

    The operating segments aggregated within the Integrated Networks - Group A and B reportable segments provide a range of services for their clients, primarily including strategy, creative and production for advertising campaigns across a variety of platforms (print, digital, social media, television broadcast) as well as public relations and communications services, experiential, social media and influencer marketing. These operating segments share similar characteristics related to (i) the nature of their services; (ii) the type of clients and the methods used to provide services; and (iii) the extent to which they may be impacted by global economic and geopolitical risks. In addition, these operating segments compete with each other for new business and from time to time have business move between them. While the operating segments are similar in nature, the distinction between the Integrated Networks - Group A and B is the aggregation of operating segments that have the most similar historical and expected average long-term profitability.

•The Media & Data Network reportable segment is comprised of a single operating segment that combines media buying and planning across a range of platforms (out-of-home, paid search, social media, lead generation,

programmatic, television broadcast) with technology and data capabilities. The Media & Data Network includes Gale Partners, Kenna, MDC Media and Northstar.

•All Other consists of the Company’s remaining operating segments that provide a range of services including advertising, public relations and marketing communication services, but generally do not have similar services offerings or financial characteristics as those aggregated in the reportable segments. The All Other category includes Allison & Partners, Bruce Mau, Forsman & Bodenfors, Hello, Team and Vitro.

•Corporate consists of corporate office expenses incurred in connection with the strategic resources provided to the operating segments, as well as certain other centrally managed expenses that are not fully allocated to the operating segments. These office and general expenses include (i) salaries and related expenses for corporate office employees, including employees dedicated to supporting the operating segments, (ii) occupancy expenses relating to properties occupied by all corporate office employees, (iii) other office and general expenses including professional fees for the financial statement audits and other public company costs, and (iv) certain other professional fees managed by the corporate office. Additional expenses managed by the corporate office that are directly related to the operating segments are allocated to the appropriate reportable segment and the All Other category.

	Three Months Ended March 31,
	2021		2020
Revenue:	(Dollars in Thousands)
Integrated Networks - Group A	$	102,386	$	90,621
Integrated Networks - Group B	111,151		117,707
Media & Data Network	36,783		41,058
All Other	57,265		78,356
Total	$	307,585	$	327,742
Adjusted EBITDA:
Integrated Networks - Group A	$	22,462	$	16,301
Integrated Networks - Group B	25,869		17,136
Media & Data Network	5,081		1,787
All Other	6,042		9,904
Corporate	(7,520)		(5,562)
Total Adjusted EBITDA	$	51,934	$	39,566
Depreciation and amortization	$	(8,176)	$	(9,206)
Impairment and other losses	(875)		(161)
Stock-based compensation	1,963		(3,070)
Deferred acquisition consideration	(11,685)		4,600
Distributions from non-consolidated affiliates	(9)		14
Other items, net	(5,485)		(2,416)
Total Operating Income	$	27,667	$	29,327
Other Income (expenses):
Interest expense and finance charges, net	$	(19,065)	$	(15,611)
Foreign exchange gain (loss)	2,080		(14,757)
Other, net	614		16,334
Income before income taxes and equity in earnings of non-consolidated affiliates	11,296		15,293
Income tax expense	1,302		13,500
Income before equity in earnings of non-consolidated affiliates	9,994		1,793
Equity in losses of non-consolidated affiliates	(493)		—
Net income	9,501		1,793
Net income attributable to the noncontrolling interest	(4,491)		(791)
Net income attributable to MDC Partners Inc.	5,010		1,002
Accretion on and net income allocated to convertible preference shares	(4,089)		(3,440)
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	921	$	(2,438)

	Three Months Ended March 31,
	2021		2020
Depreciation and amortization:	(Dollars in Thousands)
Integrated Networks - Group A	$	1,294	$	1,741
Integrated Networks - Group B	3,657		4,526
Media & Data Network	472		808
All Other	1,537		1,899
Corporate	1,216		232
Total	$	8,176	$	9,206
Stock-based compensation:
Integrated Networks - Group A	$	(3,628)	$	1,961
Integrated Networks - Group B	953		900
Media & Data Network	21		(13)
All Other	61		80
Corporate	630		142
Total	$	(1,963)	$	3,070
Capital expenditures:
Integrated Networks - Group A	$	275	$	358
Integrated Networks - Group B	213		477
Media & Data Network	64		85
All Other	134		324
Corporate	(170)		302
Total	$	516	$	1,546

The Company’s CODM does not use segment assets to allocate resources or to assess performance of the segments and therefore, total segment assets have not been disclosed.

See Note 3 of the Notes to the Unaudited Condensed Consolidated Financial Statements included herein for a summary of the Company’s revenue by geographic region for the three months ended March 31, 2021 and 2020.

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Revenue (Tables)

3 Months Ended

Mar. 31, 2021

By Location

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

The following table presents revenue disaggregated by geography for the three months ended March 31, 2021 and 2020:

		Three Months Ended March 31,
Geographical Location	Reportable Segment	2021	2020
United States	All	$242,580	$264,561
Canada	All	22,650	18,256
Other	All	42,355	44,925
		$307,585	$327,742

Industry Vertical

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

The following table presents revenue disaggregated by client industry vertical for the three months ended March 31, 2021 and 2020:

		Three Months Ended March 31,
Industry	Reportable Segment	2021		2020
Food & Beverage	All	$	55,178	$	58,091
Retail	All	30,777		36,303
Consumer Products	All	45,405		39,769
Communications	All	16,990		41,045
Automotive	All	15,629		25,192
Technology	All	46,390		25,535
Healthcare	All	31,494		24,066
Financials	All	24,442		24,005
Transportation and Travel/Lodging	All	9,948		20,486
Other	All	31,332		33,250
		$	307,585	$	327,742

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Income (Loss) Per Common Share (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share

The following table sets forth the computation of basic and diluted income (loss) per common share:

	Three Months Ended March 31,
	2021		2020
Numerator:
Net income attributable to MDC Partners Inc.	$	5,010	$	1,002
Accretion on convertible preference shares	(3,724)		(3,440)
Net income allocated to convertible preference shares	(365)		—
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	921	$	(2,438)
Adjustment to net income allocated to convertible preference shares	7		—
Net income (loss) attributable to MDC Partners Inc. common shareholders - Diluted	$	928	$	(2,438)
Denominator:
Basic weighted average number of common shares outstanding	73,392,824		72,397,661
Diluted weighted average number of common shares outstanding	75,439,066		72,397,661
Basic	$	0.01	$	(0.03)
Diluted	$	0.01	$	(0.03)

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Deferred Acquisition Consideration (Tables)

3 Months Ended

Mar. 31, 2021

Business Combinations [Abstract]

Schedule of Changes in Contingent Deferred Acquisition Consideration

The following table presents changes in contingent deferred acquisition consideration, which is measured at fair value on a recurring basis using significant unobservable inputs, and a reconciliation to the amounts reported on the balance sheets as of March 31, 2021 and December 31, 2020.

	March 31,		December 31,
	2021		2020
Beginning Balance of Contingent Payments	$	82,802	$	74,671
Payments	(1,153)		(46,792)
Redemption value adjustments (1)	12,392		44,993
Additions - Acquisitions and step-up transactions	—		7,703
Other	(641)		2,227
Ending balance of contingent payments	$	93,400	$	82,802
Fixed Payments	—		263
	$	93,400	$	83,065

(1) Redemption value adjustments are fair value changes from the Company’s initial estimates of deferred acquisition payments and stock-based compensation charges relating to acquisition payments that are tied to continued employment. Redemption value adjustments are recorded within Office and general expenses on the Unaudited Condensed Consolidated Statements of Operations.

The following table presents the impact to the Company’s Statements of operations due to the redemption value adjustments for the contingent deferred acquisition consideration:

	Three Months Ended March 31,
	2021		2020
Loss (income) attributable to fair value adjustments	$	11,685	$	(4,600)
Stock-based compensation	707		2,025
Redemption value adjustments	$	12,392	$	(2,575)

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Leases (Tables)

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Lease Costs and Other Quantitative Information

The following table presents lease costs and other quantitative information for the three months ended March 31, 2021 and 2020:

	Three Months Ended March 31,
	2021		2020
Lease Cost:
Operating lease cost	$	17,127	$	16,391
Variable lease cost	2,593		4,655
Sublease rental income	(2,564)		(2,805)
Total lease cost	$	17,156	$	18,241
Additional information:
Cash paid for amounts included in the measurement of lease liabilities for operating leases
Operating cash flows	$	16,796	$	17,635
Right-of-use lease assets obtained in exchange for operating lease liabilities and other non-cash adjustments	$	3,816	$	7,119
Weighted average remaining lease term (in years) - Operating leases	7.2		7.0
Weighted average discount rate - Operating leases	10.6		8.7

Minimum Future Rental Payments

The following table presents minimum future rental payments under the Company’s leases at March 31, 2021 and their reconciliation to the corresponding lease liabilities:

	Maturity Analysis
Remaining 2021	$52,871
2022	61,447
2023	56,839
2024	50,615
2025	39,582
2026 and thereafter	152,702
Total	414,056
Less: Present value discount	(131,452)
Lease liability	$	282,604

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Debt (Tables)

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Schedule of Debt

	March 31, 2021		December 31, 2020
Revolving Credit Agreements	$	20,000	$	—
Senior Notes	870,256		870,256
Debt Issuance Cost	(25,406)		(27,072)
	$	864,850	$	843,184

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Noncontrolling and Redeemable Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2021

Noncontrolling Interest [Abstract]

Change In Noncontrolling Interest [Table Text Block]

Changes in amounts due to noncontrolling interest holders included in Accruals and other liabilities on the Unaudited Condensed Consolidated Balance Sheets for the year ended December 31, 2020 and three months ended March 31, 2021 were as follows:

	Noncontrolling Interests
Balance at December 31, 2019	$	14,028
Income attributable to noncontrolling interests	21,774
Distributions made	(15,192)
Other	94
Balance at December 31, 2020	$	20,704
Income attributable to noncontrolling interests	4,491
Distributions made	(5,285)
Other	36
Balance at March 31, 2021	$	19,946

Noncontrolling Interest [Table Text Block]

Changes in the Company’s ownership interests in our less than 100% owned subsidiaries during the three months ended March 31, 2021 and 2020 were as follows:

	Three Months Ended March 31,
	2021		2020
Net income attributable to MDC Partners Inc.	$	5,010	$	1,002
Transfers from the noncontrolling interest:
Decrease in MDC Partners Inc. paid-in capital for purchase of redeemable noncontrolling interests and noncontrolling interests	(330)		(503)
Net transfers from noncontrolling interests	$	(330)	$	(503)
Change from Net income attributable to MDC Partners Inc. and transfers to noncontrolling interests	$	4,680	$	499

Redeemable Noncontrolling Interest [Table Text Block]

The following table presents changes in redeemable noncontrolling interests:

	Three Months Ended March 31, 2021		Year Ended December 31, 2020
Beginning Balance	$	27,137	$	36,973
Redemptions	—		(12,289)
Granted	—		—
Changes in redemption value	(1,681)		2,800
Currency translation adjustments	(104)		(347)
Ending Balance	$	25,352	$	27,137

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Fair Value of Financial Liability Measured on a Non-recurring Basis

The following table presents certain information for our financial liability that is not measured at fair value on a recurring basis at March 31, 2021 and December 31, 2020:

	March 31, 2021				December 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Liabilities:
Senior Notes	$	870,256	$	882,379	$	870,256	$	883,580

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

	Three Months Ended March 31,
	2021		2020
Revenue:	(Dollars in Thousands)
Integrated Networks - Group A	$	102,386	$	90,621
Integrated Networks - Group B	111,151		117,707
Media & Data Network	36,783		41,058
All Other	57,265		78,356
Total	$	307,585	$	327,742
Adjusted EBITDA:
Integrated Networks - Group A	$	22,462	$	16,301
Integrated Networks - Group B	25,869		17,136
Media & Data Network	5,081		1,787
All Other	6,042		9,904
Corporate	(7,520)		(5,562)
Total Adjusted EBITDA	$	51,934	$	39,566
Depreciation and amortization	$	(8,176)	$	(9,206)
Impairment and other losses	(875)		(161)
Stock-based compensation	1,963		(3,070)
Deferred acquisition consideration	(11,685)		4,600
Distributions from non-consolidated affiliates	(9)		14
Other items, net	(5,485)		(2,416)
Total Operating Income	$	27,667	$	29,327
Other Income (expenses):
Interest expense and finance charges, net	$	(19,065)	$	(15,611)
Foreign exchange gain (loss)	2,080		(14,757)
Other, net	614		16,334
Income before income taxes and equity in earnings of non-consolidated affiliates	11,296		15,293
Income tax expense	1,302		13,500
Income before equity in earnings of non-consolidated affiliates	9,994		1,793
Equity in losses of non-consolidated affiliates	(493)		—
Net income	9,501		1,793
Net income attributable to the noncontrolling interest	(4,491)		(791)
Net income attributable to MDC Partners Inc.	5,010		1,002
Accretion on and net income allocated to convertible preference shares	(4,089)		(3,440)
Net income (loss) attributable to MDC Partners Inc. common shareholders	$	921	$	(2,438)

	Three Months Ended March 31,
	2021		2020
Depreciation and amortization:	(Dollars in Thousands)
Integrated Networks - Group A	$	1,294	$	1,741
Integrated Networks - Group B	3,657		4,526
Media & Data Network	472		808
All Other	1,537		1,899
Corporate	1,216		232
Total	$	8,176	$	9,206
Stock-based compensation:
Integrated Networks - Group A	$	(3,628)	$	1,961
Integrated Networks - Group B	953		900
Media & Data Network	21		(13)
All Other	61		80
Corporate	630		142
Total	$	(1,963)	$	3,070
Capital expenditures:
Integrated Networks - Group A	$	275	$	358
Integrated Networks - Group B	213		477
Media & Data Network	64		85
All Other	134		324
Corporate	(170)		302
Total	$	516	$	1,546

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Basis of Presentation and Recent Developments (Details)	3 Months Ended
	Mar. 31, 2021 reportable_segment	Mar. 23, 2016 USD ($)
Debt [Line Items]
Number of reportable segments | reportable_segment	3
6.50% Notes due 2024
Debt [Line Items]
Interest rate, stated percentage	7.50%
6.50% Notes due 2024 | Senior Notes
Debt [Line Items]
Aggregate principal amount | $		$ 900,000,000

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Acquisitions and Dispositions (Details Textual) - USD ($) $ in Thousands				3 Months Ended		12 Months Ended
	Jul. 01, 2020	Mar. 19, 2020	Feb. 14, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
Aggregate purchase price for noncontrolling interest				$ 5,486	$ 4,608
Deferred acquisition consideration				93,400		$ 83,065
Redeemable noncontrolling interest, redemptions, value				0		$ 12,289
Veritas [Member]
Business Acquisition [Line Items]
Remaining ownership interest acquired	10.00%
Aggregate purchase price for noncontrolling interest	$ 2,187
Deferred cash payment for noncontrolling interest	1,087
Reduction of noncontrolling and redeemable noncontrolling interest	2,651
Difference between purchase price and noncontrolling interest recorded in common stock and other paid-in capital	$ 464
KWT Global [Member]
Business Acquisition [Line Items]
Remaining ownership interest acquired (percent)		22.50%
Aggregate purchase price		$ 2,118
Closing cash payment		729
Deferred acquisition consideration		1,389
Redeemable noncontrolling interest, redemptions, value				$ (1,615)
Reduction in noncontrolling interests		$ 503
Sloane and Company LLC [Member]
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses			$ 26,696
Gain (loss) on disposition of business			$ 16,827
Sloane and Company LLC [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Business Acquisition [Line Items]
Period of contingent payments expected after disposal			2 years

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Revenue - Additional Information (Details)	3 Months Ended
	Mar. 31, 2021 country
Non-US And Canada [Member]
Disaggregation of Revenue [Line Items]
Number of countries in which entity operates	11
Minimum
Disaggregation of Revenue [Line Items]
Payment period	30 days
Termination period	30 days
Maximum
Disaggregation of Revenue [Line Items]
Payment period	60 days
Termination period	90 days

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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Services	$ 307,585	$ 327,742
United States
Disaggregation of Revenue [Line Items]
Services	242,580	264,561
Canada
Disaggregation of Revenue [Line Items]
Services	22,650	18,256
Other
Disaggregation of Revenue [Line Items]
Services	42,355	44,925
Food & Beverage
Disaggregation of Revenue [Line Items]
Services	55,178	58,091
Retail
Disaggregation of Revenue [Line Items]
Services	30,777	36,303
Consumer Products
Disaggregation of Revenue [Line Items]
Services	45,405	39,769
Communications
Disaggregation of Revenue [Line Items]
Services	16,990	41,045
Automotive
Disaggregation of Revenue [Line Items]
Services	15,629	25,192
Technology
Disaggregation of Revenue [Line Items]
Services	46,390	25,535
Healthcare
Disaggregation of Revenue [Line Items]
Services	31,494	24,066
Financials
Disaggregation of Revenue [Line Items]
Services	24,442	24,005
Transportation and Travel/Lodging
Disaggregation of Revenue [Line Items]
Services	9,948	20,486
Other
Disaggregation of Revenue [Line Items]
Services	$ 31,332	$ 33,250

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Revenue - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Unbilled service fees	$ 59,143	$ 49,110
Unbilled outside vendor costs, billable to clients	22,824	10,552
Contract with Customer, Liability, Revenue Recognized		69,699
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	5,799
Advance Billings
Disaggregation of Revenue [Line Items]
Advance billings	170,159	152,956
Increase (Decrease) in Contract with Customer, Liability	17,203
Contract with Customer, Liability, Revenue Recognized	$ 99,188
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Percentage	83.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Percentage	17.00%
Accrued Expenses and Other Current Liabilities
Disaggregation of Revenue [Line Items]
Advance billings	$ 97,075	$ 112,755
Increase (Decrease) in Contract with Customer, Liability	$ 15,680

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Income (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Class of Stock [Line Items]
Net loss attributable to MDC Partners Inc.	$ 5,010	$ 1,002
Numerator
Net income (loss) attributable to MDC Partners Inc. common shareholders	$ 921	$ (2,438)
Denominator
Denominator for basic income (loss) per common share - weighted average common shares	73,392,824	72,397,661,000
Denominator for diluted income (loss) per common share - adjusted weighted shares and assumed conversions	75,439,066	72,397,661,000
Earnings per share, basic	$ 0.01	$ (0.03)
Earnings per share, diluted	$ 0.01	$ (0.03)
Series 4 Convertible Preferred Stock | Convertible Preference Shares
Numerator
Accretion on and net income allocated to convertible preference shares	$ (3,724)
Net income allocated to convertible preference shares	$ (365)	$ 0
Denominator
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,920,634	2,835,770

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Income (Loss) Per Common Share (Details Textual) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Contingent Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)	0	2,203,717
Series 4 Convertible Preferred Stock | Convertible Preference Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)	1,920,634	2,835,770
Shares outstanding (shares)	145,000,000	145,000,000	145,000,000	145,000,000
Convertible preferred stock, common shares issuable upon conversion (shares)	29,430,693	27,189,411

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Deferred Acquisition Consideration (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance of contingent payments	$ 82,802	$ 74,671	$ 74,671
Payments	1,153		46,792
Redemption value adjustments	12,392	(2,575)	44,993
Additions	0		7,703
Foreign translation adjustment	(641)		2,227
Ending balance of contingent payments	93,400		82,802
Deferred acquisition consideration	93,400		83,065
Stock-based compensation	707	2,025
Fixed payments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Deferred acquisition consideration	0		$ 263
Contingent Payment
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loss (income) attributable to fair value adjustments	$ 11,685	$ (4,600)

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Leases - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) lease
Leases [Abstract]
Number of leases not yet commenced | lease	5
Leases not yet commenced, liability	$ 34,020
Impairment of right-of-use asset and accelerated operating expenses	$ 875

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Leases - Lease Costs and Other Quantitative Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 17,127	$ 16,391
Variable lease cost	2,593	4,655
Sublease rental income	(2,564)	(2,805)
Total lease cost	17,156	18,241
Operating cash flows	16,796	17,635
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 3,816	$ 7,119
Weighted average remaining lease term (in years) - Operating leases	7 years 2 months 12 days	7 years
Weighted average discount rate - Operating leases	10.60%	870.00%

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Leases - Minimum Future Rental Payments (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Leases [Abstract]
Remaining 2021	$ 52,871
2022	61,447
2023	56,839
2024	50,615
2025	39,582
2026 and thereafter	152,702
Total	414,056
Less: Present value discount	(131,452)
Lease liability	$ 282,604

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Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt [Line Items]
Revolving credit agreement	$ 20,000	$ 0
Debt Issuance Cost	(25,406)	(27,072)
Long-term Debt, Excluding Current Maturities	864,850	843,184
6.50% Notes due 2024 | Fair Value, Inputs, Level 1 | Senior Notes
Debt [Line Items]
Long-term Debt	$ 870,256	$ 870,256

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Debt (Details Textual) - USD ($)	May 28, 2020	Mar. 23, 2016	Mar. 31, 2021	Dec. 31, 2020
Debt [Line Items]
Amount outstanding under the line of credit			$ 20,000,000	$ 0
Prime Rate | Minimum
Debt [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Prime Rate | Maximum
Debt [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Non-Prime Rate | Minimum
Debt [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Non-Prime Rate | Maximum
Debt [Line Items]
Debt Instrument, Basis Spread on Variable Rate	3.00%
6.50% Notes due 2024
Debt [Line Items]
Interest rate, stated percentage			7.50%
Senior Notes | 6.50% Notes due 2024
Debt [Line Items]
Aggregate principal amount		$ 900,000,000
Percentage of redemption price, change in ownership controllatest for redemption at face amount		101.00%
Percentage of redemption price, redemption date, latest for redemption at face amounttion Price, Redemption Date, Latest For Redemption At Face Amount		100.00%
Line of Credit [Member]
Debt [Line Items]
Maximum borrowing capacity			$ 211,500,000
Letter of Credit
Debt [Line Items]
Maximum borrowing capacity			$ 19,151,000	$ 18,651,000

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Noncontrolling and Redeemable Noncontrolling Interests (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest, Equity, Fair Value	$ 25,352	$ 27,137	$ 36,973
Vesting over period [Member]
Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest, Equity, Fair Value	16,469
Termination, disability, or death [Member]
Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest, Equity, Fair Value	8,883
Acquisition Value in excess of Redemption Value [Member]
Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest, Equity, Fair Value	$ 0

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Noncontrolling and Redeemable Noncontrolling Interests - Changes in Amounts Due to Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Noncontrolling Interest [Abstract]
Beginning balance	$ 20,704	$ 14,028
Income attributable to noncontrolling interests		21,774
Distributions made	(5,285)	(15,192)
Other	36	$ 94
Ending balance	$ 19,946

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Noncontrolling and Redeemable Noncontrolling Interests - Changes in Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Noncontrolling Interest [Line Items]
Net loss attributable to MDC Partners Inc.	$ 5,010	$ 1,002
Business acquisitions and step-up transactions, net of tax	(330)	(503)
Change from Net income attributable to MDC Partners Inc. and transfers to noncontrolling interests	(4,680)	(499)
MDC Partners Inc. Shareholders' Deficit
Noncontrolling Interest [Line Items]
Business acquisitions and step-up transactions, net of tax	$ (330)	$ (503)

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Noncontrolling and Redeemable Noncontrolling Interests - Changes in Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Noncontrolling Interest [Abstract]
Beginning Balance	$ 27,137	$ 36,973
Redemptions	0	12,289
Granted	0	0
Changes in redemption value	1,681	(2,800)
Currency translation adjustments	(104)	(347)
Ending Balance	$ 25,352	$ 27,137

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Share Capital (Details Textual)			3 Months Ended
	Mar. 14, 2019 USD ($) $ / shares shares	Mar. 07, 2017 USD ($) $ / shares	Mar. 31, 2021 USD ($) vote $ / shares shares	Dec. 31, 2020 USD ($) shares	Mar. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares
Share Capital [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			$ (405,583,000)	$ (408,910,000)	$ (183,944,000)	$ (190,575,000)
Preferred Stock
Share Capital [Line Items]
Proceeds from Issuance of Convertible Preferred Stock	$ 98,620,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 90,123,000	$ 152,746,000	$ 152,746,000	$ 152,746,000	$ 152,746,000
Preferred Stock | Series 4 Convertible Preferred Stock
Share Capital [Line Items]
Proceeds from Issuance of Convertible Preferred Stock		$ 95,000
Preferred Stock, Conversion Price Per Preference Share | $ / shares	$ 7.42	$ 10.00
Preferred Stock, Accretion Percentage, Preference	8.00%
Preferred Stock, Accretion Rate, Preference Per Share | $ / shares			$ 9.02
Preferred Stock, Accretion of Redemption Discount			$ 2,571,000
Preferred Stock, Liquidation Preference, Value			$ 131,110,000
Preferred Stock, Convertible Preference Shares, Convertible at Company's Option, Term	2 years	5 years
Shares outstanding (shares) | shares			145,000,000	145,000,000	145,000,000	145,000,000
Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price	125.00%
Preferred Stock, Liquidation Preference Percentage Rate, Change of Control of the Company	7.00%
Preferred Stock | Series 6 Convertible Preferred Stock
Share Capital [Line Items]
Stock Issued During Period, Shares, Issued for Services | shares	50,000
Proceeds from Issuance of Convertible Preferred Stock	$ 50,000,000
Preferred Stock, Liquidation Preference Per Share | $ / shares	$ 1,000	$ 1,000
Preferred Stock, Conversion Price Per Preference Share | $ / shares	$ 5.00
Preferred Stock, Accretion Percentage, Preference	8.00%
Preferred Stock, Monthly Accretion of Redemption Discount			$ 7.69
Preferred Stock, Accretion of Redemption Discount			1,153,000
Preferred Stock, Liquidation Preference, Value			58,804,000
Preferred Stock, Convertible Preference Shares, Convertible at Company's Option, Term	2 years	5 years
Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price	125.00%
Preferred Stock, Dividend Rate, Percentage	7.00%
Common Stock and Other Paid-in Capital
Share Capital [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			$ 106,193,000	$ 104,367,000	$ 99,587,000	$ 101,469,000
Issuance of common and convertible preference shares	$ 35,997
Common Shares | Common Class A
Share Capital [Line Items]
Stock Issued During Period, Shares, Issued for Services | shares	14,285,714
Proceeds from Issuance of Common Stock	$ 50,000,000
Shares outstanding (shares) | shares			74,787,317	73,529,105
Common stock, voting rights, number of votes per share | vote			1
Common Stock, Par or Stated Value Per Share | $ / shares			$ 0
Common Shares | Common Class B
Share Capital [Line Items]
Shares outstanding (shares) | shares			3,743	3,743
Common stock, voting rights, number of votes per share | vote			20
Preferred Stock, Par or Stated Value Per Share | $ / shares			$ 0
Contingent Consideration, Liability Settlements [Domain] | Preferred Stock | Series 4 Convertible Preferred Stock
Share Capital [Line Items]
Issuance of common and convertible preference shares	$ 62,623

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Fair Value Measurements (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Liabilities:
Impairment of right-of-use asset	$ 598
Measurement Input, Discount Rate
Liabilities:
Business Combination, Contingent Consideration, Liability, Measurement Input	0.051
Senior Notes | Reported Value Measurement
Liabilities:
Debt Instrument, Fair Value Disclosure	$ 870,256	$ 870,256
Senior Notes | Estimate of Fair Value Measurement
Liabilities:
Debt Instrument, Fair Value Disclosure	882,379	883,580
6.50% Notes due 2024 | Fair Value, Inputs, Level 1 | Senior Notes
Liabilities:
Long term debt, Carrying Amount	$ 870,256	$ 870,256

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Supplemental Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Asset Impairment Charges	$ 875	$ 161
Impairment of Right-Of-Use Asset	598
Goodwill	669,060		$ 668,211
Income tax expense	1,302	13,500
Income before income taxes and equity in earnings of non-consolidated affiliates	$ 11,296	$ 15,293
Effective tax rate (percent)	11.50%	88.30%
Revenues	$ 307,585	$ 327,742
Increase (Decrease) in Accounts Receivable	$ 2,779	$ (41,148)

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Supplemental Information - Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenues	$ 307,585	$ 327,742
Asset Impairment Charges	875	161
Costs and Expenses	279,918	298,415
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	11,296	15,293
Income Tax Expense (Benefit)	1,302	13,500
Net income (loss) attributable to MDC Partners Inc. common shareholders	$ 921	$ (2,438)
Weighted Average Number of Shares Outstanding, Basic	73,392,824	72,397,661,000
Weighted Average Number of Shares Outstanding, Diluted	75,439,066	72,397,661,000
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.01	$ (0.03)
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.01	$ (0.03)

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Supplemental Information - Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	$ 377,670	$ 374,892
Goodwill	669,060	668,211
Assets	1,560,713	1,511,312
Accruals and other liabilities	242,667	274,968
Liabilities	1,940,944	1,893,085
Accumulated deficit	(704,741)	(709,751)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(405,583)	(408,910)	$ (183,944)	$ (190,575)
Liabilities and Equity	$ 1,560,713	$ 1,511,312

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Related Party Transactions (Details) - USD ($) $ in Thousands		3 Months Ended		5 Months Ended
	Jan. 01, 2020	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021
Related Party Transaction [Line Items]
Sublease rental income		$ 2,564	$ 2,805
Stagwell Subsidiary [Member] | Services Provided By Subisidiary [Member]
Related Party Transaction [Line Items]
Due to Related Parties		2,000		$ 2,000
Accounts Payable, Related Parties		101		101
Stagwell Subsidiary [Member] | Event Management Services
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction				456
Due from Related Parties		316		316
Stagwell Affiliate [Member] | Affiliated Entity [Member] | Arrangement To Perform Media, Planning, Buying And Reporting Services [Member]
Related Party Transaction [Line Items]
Accounts receivable, related parties, current		529		529
Due from (to) from related parties		$ 0		$ 0
Other Company [Member] | Board of Directors Chairman [Member]
Related Party Transaction [Line Items]
Sublease rental income	$ 65

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Segment Information (Details 1) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) reportable_segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | reportable_segment	3
Revenues	$ 307,585	$ 327,742
Segment operating income (loss)	27,667	29,327
Interest expense and finance charges, net	(19,065)	(15,611)
Foreign exchange gain (loss)	2,080	(14,757)
Other, net	614	16,334
Income before income taxes and equity in earnings of non-consolidated affiliates	11,296	15,293
Income tax expense	1,302	13,500
Income before equity in earnings of non-consolidated affiliates	9,994	1,793
Equity in losses of non-consolidated affiliates	(493)	0
Net income	9,501	1,793
Net income attributable to the noncontrolling interest	(4,491)	(791)
Net income attributable to MDC Partners Inc.	5,010	1,002
Net income (loss) attributable to MDC Partners Inc. common shareholders	921	(2,438)
Asset Impairment Charges	(875)	(161)
Depreciation, Depletion and Amortization, Nonproduction	8,176	9,206
Depreciation	8,176	9,206
Stock-based compensation	1,963	(3,070)
Proceeds from (Payments to) Noncontrolling Interests	(9)	14
Deferred acquisition consideration	(11,685)	4,600
Other Operating Income	(5,485)	(2,416)
Adjusted EBITDA	51,934	39,566
Capital Expenditures, Incurred, Paid and Not Yet Paid	516	1,546
Series 4 Convertible Preferred Stock [Domain] | Convertible Preference Shares
Segment Reporting Information [Line Items]
Accretion on and net income allocated to convertible preference shares	4,089	3,440
All Other
Segment Reporting Information [Line Items]
Revenues	57,265	78,356
Depreciation, Depletion and Amortization, Nonproduction	1,537	1,899
Stock-based compensation	(61)	(80)
Adjusted EBITDA	6,042	9,904
Capital Expenditures, Incurred, Paid and Not Yet Paid	134	324
Media And Data Network
Segment Reporting Information [Line Items]
Revenues	36,783	41,058
Depreciation, Depletion and Amortization, Nonproduction	472	808
Stock-based compensation	(21)	13
Adjusted EBITDA	5,081	1,787
Capital Expenditures, Incurred, Paid and Not Yet Paid	64	85
Integrated Networks - Group A
Segment Reporting Information [Line Items]
Revenues	102,386	90,621
Depreciation, Depletion and Amortization, Nonproduction	1,294	1,741
Stock-based compensation	3,628	(1,961)
Adjusted EBITDA	22,462	16,301
Capital Expenditures, Incurred, Paid and Not Yet Paid	275	358
Integrated Networks - Group B
Segment Reporting Information [Line Items]
Revenues	111,151	117,707
Depreciation, Depletion and Amortization, Nonproduction	3,657	4,526
Stock-based compensation	(953)	(900)
Adjusted EBITDA	25,869	17,136
Capital Expenditures, Incurred, Paid and Not Yet Paid	213	477
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization, Nonproduction	1,216	232
Stock-based compensation	(630)	(142)
Adjusted EBITDA	(7,520)	(5,562)
Capital Expenditures, Incurred, Paid and Not Yet Paid	$ (170)	$ 302