Stagwell (STGW) 10-Q 7 Nov 22 2022 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 28, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	001-13718
Entity Registrant Name	Stagwell Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-1390679
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 Common Stock, par value $0.001 per share
Trading Symbol	STGW
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
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	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		130,785,623
Common Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		3,946
Common Class C
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		164,375,682

UNAUDITED CONDENSED CONSOLIDATE

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating expenses:
Cost of services	$ 417,134	$ 324,782	$ 1,253,765	$ 558,856
Office and general expenses	119,186	121,770	429,121	226,720
Depreciation and amortization	32,207	24,790	95,642	46,122
Impairment and other losses	25,211	14,926	28,034	14,926
Costs and Expenses, Total	593,738	486,268	1,806,562	846,624
Operating Income (Loss), Total	70,053	(19,634)	173,045	10,812
Other income (expense):
Interest expense, net	(19,672)	(11,912)	(56,552)	(15,197)
Foreign exchange, net	(3,927)	(893)	(4,163)	(1,955)
Other, net	147	45,621	182	46,806
Nonoperating Income (Expense), Total	(23,452)	32,816	(60,533)	29,654
Income before income taxes and equity in earnings of non-consolidated affiliates	46,601	13,182	112,512	40,466
Income tax expense	11,540	5,183	20,150	9,205
Income before equity in earnings of non-consolidated affiliates	35,061	7,999	92,362	31,261
Equity in income (loss) of non-consolidated affiliates	213	(76)	1,053	(75)
Net income	35,274	7,923	93,415	31,186
Net income attributable to noncontrolling and redeemable noncontrolling interests	(24,665)	(9,994)	(59,668)	(10,987)
Net income (loss) attributable to Stagwell Inc. common shareholders	$ 10,609	$ (2,071)	$ 33,747	$ 20,199
Earnings Per Share [Abstract]
Earnings per share, basic	$ 0.08	$ (0.06)	$ 0.27	$ (0.06)
Earnings per share, diluted	$ 0.08	$ (0.06)	$ 0.26	$ (0.06)
Weighted Average Number Of Shares Outstanding For Basic and Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic	125,384	76,106	124,710	76,106
Weighted Average Number of Shares Outstanding, Diluted	130,498	76,106	131,550	76,106
Revenues	$ 663,791	$ 466,634	$ 1,979,607	$ 857,436

UNAUDITED CONSOLIDATED STATEMEN

UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Comprehensive income (loss)
Net income	$ 35,274	$ 7,923	$ 93,415	$ 31,186
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(30,505)	12,537	(59,678)	12,537
Other Comprehensive Income (Loss), Net of Tax, Total	(30,505)	12,537	(59,678)	12,537
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	4,769	20,460	33,737	43,723
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(24,665)	(9,994)	(59,668)	(10,987)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	$ (19,896)	$ 10,466	$ (25,931)	$ 32,736

UNAUDITED CONDENSED CONSOLIDA_2

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 165,251	$ 184,009
Accounts receivable, net	725,346	696,937
Expenditures billable to clients	57,873	63,065
Other current assets	71,249	61,830
Total Current Assets	1,019,719	1,005,841
Fixed assets, net	123,128	118,603
Right-of-use lease assets - operating leases	283,974	311,654
Goodwill	1,615,694	1,652,723
Other intangible assets, net	879,049	937,695
Other assets	47,784	29,064
Total Assets	3,969,348	4,055,580
Current Liabilities
Accounts payable	294,402	271,769
Accrued media	188,344	237,794
Accruals and other liabilities	211,263	272,533
Advance billings	340,675	361,885
Current portion of lease liabilities - operating leases	73,659	72,255
Current portion of deferred acquisition consideration	74,426	77,946
Total Current Liabilities	1,182,769	1,294,182
Long-term debt	1,329,134	1,191,601
Long-term portion of deferred acquisition consideration	85,163	144,423
Long-term lease liabilities - operating leases	308,162	342,730
Deferred tax liabilities, net	103,243	103,093
Other liabilities	70,167	57,147
Total Liabilities	3,078,638	3,133,176
Redeemable Noncontrolling Interests	65,817	43,364
Commitments and Contingencies
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common Stock, Value, Issued	348,663	382,893
Retained Earnings (Accumulated Deficit)	6,573	(6,982)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(64,956)	(5,278)
Stockholders' Equity Attributable to Parent, Total	290,417	370,753
Stockholders' Equity Attributable to Noncontrolling Interest	534,476	508,287
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Total	824,893	879,040
Liabilities and Equity, Total	3,969,348	4,055,580
Common Class A and Common Class B
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common shares	135	118
Common Class C
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common shares	$ 2	$ 2

UNAUDITED CONDENSED CONSOLIDA_3

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income	$ 93,415	$ 31,186
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Stock-based compensation	33,410	53,465
Depreciation and amortization	95,642	46,122
Impairment and other losses	28,034	14,926
Provision for bad debt expense	2,681	1,893
Deferred income taxes	(1,557)	2,710
Adjustment to deferred acquisition consideration	(14,420)	9,456
Other	(1,002)	6,998
Changes in working capital:
Accounts receivable	(34,637)	(26,095)
Expenditures billable to clients	5,525	(9,230)
Other assets	4,100	(14,568)
Accounts payable	34,630	(37,435)
Accrued expenses and other liabilities	(138,947)	(26,668)
Advance billings	(23,017)	16,598
Deferred acquisition related payments	(10,776)	(5,772)
Net Cash Provided by (Used in) Operating Activities, Total	73,081	20,146
Cash flows from investing activities:
Capital expenditures	(25,495)	(13,666)
Current period acquisitions, net of cash acquired	(37,461)	130,155
Other	(1,328)	0
Net Cash Provided by (Used in) Investing Activities, Total	(64,284)	153,721
Repayment of borrowings under revolving credit facility
Repayment of borrowings under revolving credit facility	(855,000)	(535,472)
Proceeds from borrowings under revolving credit facility	989,500	408,369
Shares acquired and cancelled	14,970	820
Distributions to noncontrolling interests and other	(38,486)	(19,245)
Payment of deferred consideration	(61,089)	0
Distributions	0	(204,929)
Repurchase of Common Stock	0	(884,398)
Repurchase of Common Stock	(28,667)	0
Net Cash Provided by (Used in) Financing Activities, Total	(12,312)	(151,860)
Effect of exchange rate changes on cash and cash equivalents	(15,243)	1,025
Net decrease in cash and cash equivalents	(18,758)	23,032
Cash and cash equivalents at beginning of period	184,009	92,457
Cash and cash equivalents at end of period	165,251	115,489
Supplemental disclosures:
Cash income taxes paid	23,315	42,346
Cash interest paid	61,016	22,493
Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed)	0	426,396
Acquisitions of noncontrolling interest	0	37,559
Non-cash investing and financing activities:
Reduction of deferred tax liability related to the exchange of Paired Units	20,763	0
Establishment of Tax Receivables Agreement liability	17,649	0
Non-cash contributions	0	12,372
Non-cash distributions to Stagwell Media LP	0	13,000
Non-cash payment of deferred acquisition consideration	0	7,080
Purchase of noncontrolling interest	3,600	0
Proceeds from issuance of the 5.625% Notes	0	1,100,000
Debt issuance costs	0	(15,365)
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	0	(43,440)
Proceeds from Sale of Productive Assets	$ 0	$ 37,232

UNAUDITED CONDENSED CONSOLIDA_4

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT - USD ($)	Total	Approved plan	Members' capital	Stagwell Inc. Shareholders' Equity	Stagwell Inc. Shareholders' Equity Approved plan	Common Shares Common Class A & B	Common Shares Common Class A & B Approved plan	Common Shares Class C	Paid-in Capital	Paid-in Capital Approved plan	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests	Convertible Preference Shares
Beginning balance at Dec. 31, 2020			$ 358,756,000
Balance at Dec. 31, 2020	$ 398,543,000			$ 358,756,000									$ 39,787,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	12,537,000
Contribution from Limited Liability Company (LLC)	250,000		250,000	250,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	(204,929,000)		(204,929,000)	(204,929,000)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(11,936,000)												(11,936,000)
Changes in redemption value of RNCI	(72,000)		(72,000)	(72,000)
Adjustments to Additional Paid in Capital, Changes due to Business Combinations	9,679,000			9,679,000
Other											$ 0	$ 0
Ending balance at Sep. 30, 2021			0
Balance (in shares) at Sep. 30, 2021						78,984,000		179,970,000						123,849,000
Balance at Sep. 30, 2021	1,041,230,000			385,980,000		$ 77,000		$ 2,000	$ 169,537,000		(6,153,000)	12,537,000	655,250,000	$ 209,980,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income attributable to noncontrolling interests	10,987,000
Beginning balance at Dec. 31, 2020			358,756,000
Balance at Dec. 31, 2020	398,543,000			358,756,000									39,787,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Changes in redemption value	(3,834,000)
Balance (in shares) at Dec. 31, 2021						118,252,000		179,970,000
Balance at Dec. 31, 2021	879,040,000			370,753,000		$ 118,000		$ 2,000	382,893,000		(6,982,000)	(5,278,000)	508,287,000
Beginning balance at Jun. 30, 2021	350,395,000
Balance at Jun. 30, 2021	381,342,000			350,395,000									30,947,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other Comprehensive Income (Loss), Net of Tax	12,537,000
Adjustments to Additional Paid in Capital, Changes due to Business Combinations	9,679,000			9,679,000
Ending balance at Sep. 30, 2021			$ 0
Balance (in shares) at Sep. 30, 2021						78,984,000		179,970,000						123,849,000
Balance at Sep. 30, 2021	1,041,230,000			385,980,000		$ 77,000		$ 2,000	169,537,000		(6,153,000)	12,537,000	655,250,000	$ 209,980,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income attributable to noncontrolling interests	9,994,000
Balance (in shares) at Dec. 31, 2021						118,252,000		179,970,000
Balance at Dec. 31, 2021	879,040,000			370,753,000		$ 118,000		$ 2,000	382,893,000		(6,982,000)	(5,278,000)	508,287,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact				33,747,000							33,747,000		55,110,000
Other Comprehensive Income (Loss), Net of Tax	(59,678,000)			(59,678,000)								(59,678,000)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(29,957,000)												(29,957,000)
Changes in redemption value	(20,546,000)
Reduction of noncontrolling and redeemable noncontrolling interest	(4,600,000)			(1,000,000)					(1,000,000)				(3,600,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncontrolling Interest	2,667,000												2,667,000
Changes in redemption value of RNCI	(20,546,000)			(20,546,000)							(20,546,000)
Granting of restricted awards	0					$ (4,000)			(4,000)
Granting of restricted awards (in shares)						3,678,000
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited						(111,000)
Shares repurchased and cancelled (withheld for payroll taxes)	(14,972,000)	$ (28,671,000)		(14,972,000)	$ (28,671,000)	$ (2,000)	$ (4,000)		(14,970,000)	$ (28,667,000)
Shares acquired and cancelled (in shares)						(2,005,000)	(4,006,000)
Stock-based compensation	25,475,000			25,475,000					25,475,000
Adjustments to Additional Paid in Capital, Changes due to Business Combinations	(1,000,000)			(1,000,000)
Conversion of shares						$ 16,000			(16,000)
Conversion of shares (in shares)						15,594,000		(15,594,000)
Finalization of MDC acquisition accounting	(13,993,000)			(16,294,000)					(16,294,000)				2,301,000
Stockholders' Equity, Other Shares						142,000
Other	(1,271,000)			(1,603,000)		$ 3,000			(1,246,000)		(354,000)		332,000
Balance (in shares) at Sep. 30, 2022						131,544,000		164,376,000
Balance at Sep. 30, 2022	824,893,000			290,417,000		$ 135,000		$ 2,000	348,663,000		6,573,000	(64,956,000)	534,476,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent, Equity Statement Impact	88,857,000
Income attributable to noncontrolling interests	59,668,000
Balance (in shares) at Jun. 30, 2022						131,838,000		164,427,000
Balance at Jun. 30, 2022	857,384,000			344,299,000		$ 135,000		$ 2,000	368,345,000		10,268,000	(34,451,000)	513,085,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact				10,609,000							10,609,000
Other Comprehensive Income (Loss), Net of Tax	(30,505,000)			(30,505,000)								(30,505,000)
Changes in redemption value of RNCI	(14,658,000)			(14,658,000)							(14,658,000)
Granting of restricted awards						$ (2,000)			(2,000)
Granting of restricted awards (in shares)						1,689,000
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited						(3,000)
Shares repurchased and cancelled (withheld for payroll taxes)	(46,000)	$ (13,830,000)		(46,000)	$ (13,830,000)	$ (2,000)	$ (2,000)		(44,000)	$ (13,828,000)
Shares acquired and cancelled (in shares)						(7,000)	(2,025,000)
Stock-based compensation	9,583,000			9,583,000					9,583,000
Adjustments to Additional Paid in Capital, Changes due to Business Combinations	0			0
Conversion of shares						$ 1,000			(1,000)
Conversion of shares (in shares)						51,000		(51,000)
Finalization of MDC acquisition accounting	(13,993,000)			(16,294,000)					(16,294,000)				2,301,000
Stockholders' Equity, Other Shares						1,000
Other	1,224,000			(1,259,000)		$ 1,000			(904,000)		354,000		2,483,000
Balance (in shares) at Sep. 30, 2022						131,544,000		164,376,000
Balance at Sep. 30, 2022	824,893,000			$ 290,417,000		$ 135,000		$ 2,000	$ 348,663,000		$ 6,573,000	$ (64,956,000)	534,476,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent, Equity Statement Impact	32,182,000
Income attributable to noncontrolling interests	$ 24,665,000												$ 21,573,000

Basis of Presentation and Recen

Basis of Presentation and Recent Developments	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Recent Developments	1. Business and Basis of Presentation Stagwell Inc. (the “Company” or “Stagwell”), incorporated under the laws of Delaware, conducts its business through its networks and their Brands (“Brands”), which provide marketing and business solutions that realize the potential of combining data and creativity. Stagwell’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. The accompanying condensed consolidated financial statements include the accounts of Stagwell and its subsidiaries. Stagwell has prepared the unaudited condensed consolidated interim financial statements included herein in accordance with accounting principles generally accepted in the United States (“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, 2021 (“2021 Form 10-K”). On December 21, 2020, MDC Partners Inc. (“MDC”) and Stagwell Media LP (“Stagwell Media”) announced that they had entered into the Transaction Agreement, providing for the combination of MDC with the operating businesses and subsidiaries of Stagwell Media (the “Stagwell Subject Entities”). The Stagwell Subject Entities comprised Stagwell Marketing Group LLC (“Stagwell Marketing” or “SMG”) and its direct and indirect subsidiaries. On August 2, 2021, we completed the previously announced combination of MDC and the operating businesses and subsidiaries of Stagwell Media and a series related transactions (such combination and transactions, the “Transactions”). The Transactions were treated as a reverse acquisition for financial reporting purposes, with MDC treated as the legal acquirer and Stagwell Marketing treated as the accounting acquirer. The results of MDC are included within the Unaudited Condensed Consolidated Statements of Operations for the period beginning on the date of the acquisition through the end of the respective period presented and the results of SMG are included for the entire period presented. See Note 3 of the Notes included herein for information in connection with the acquisition of MDC. We continue to monitor the impact on our operations from worldwide events such as the COVID-19 pandemic and evolving strains of COVID-19, as well as the military conflict between Russia and Ukraine, which we do not expect to have a material adverse effect on our operations. Our judgments, assumptions and estimates about the potential effects of such events are reflected in the financial statements. The use of different judgements, assumptions or estimates could have a material impact on our condensed consolidated financial statements. 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. We have revised the presentation of Current Liabilities to separately present Accrued media, which was previously included in Accruals and other liabilities, of $237,794 as of December 31, 2021. As a result, the accompanying Condensed Consolidated Balance Sheet has been revised to correct this immaterial classification error by decreasing the previously reported amount for Accruals and other liabilities as of December 31, 2021 by the $237,794 of Accrued media. This revision had no effect on our previously reported Total Current Liabilities, or on any other previously reported amounts in our consolidated financial statements for the year ended December 31, 2021. Recent Developments On October 3, 2022, the Company acquired all of the equity interest of Maru Group Limited Ltd, a software experience & insights data platform, for approximately £23,000 in cash, subject to post-closing adjustments. On October 3, 2022, the Company acquired the remaining 80% interest that it did not already own in Wolfgang, LLC, a creative agency combining consultancy, strategy and technology experience, for approximately $3,750 in cash and $5,250 in shares of Stagwell Inc. Class A Common Stock, subject to post-closing adjustments. The stock payment is subject to the seller’s continued employment throughout the period, with total shares vesting on July 1, 2025.
Reclassifications	We have revised the presentation of Current Liabilities to separately present Accrued media, which was previously included in Accruals and other liabilities, of $237,794 as of December 31, 2021. As a result, the accompanying Condensed Consolidated Balance Sheet has been revised to correct this immaterial classification error by decreasing the previously reported amount for Accruals and other liabilities as of December 31, 2021 by the $237,794 of Accrued media. This revision had no effect on our previously reported Total Current Liabilities, or on any other previously reported amounts in our consolidated financial statements for the year ended December 31, 2021.

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements	New Accounting PronouncementsIn March 2020, the Financial Accounting Standards Board, (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, and in January 2021 subsequently issued ASU 2021-01, Facilitation of the Effects of Reference Rate Reform on Financial Reporting, to provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 is effective upon issuance, through December 31, 2022. The Combined Credit Agreement (as defined in Note 8 of the Notes included herein) is the Company’s only contractual arrangement that referenced LIBOR and is impacted by ASU 2020-04. On April 28, 2022, the Company amended the Combined Credit Agreement. Among other things, this amendment replaced any references to LIBOR with references to the Secured Overnight Financing Rate (“SOFR”). Based on the Company’s assessment, the Company has elected to apply the optional expedient and treat the contract modifications as a continuation of an existing contract. This election does not have a material effect on our results of operations or financial position. See Note 8 of the Notes included herein for information.

Acquisitions and Dispositions

Acquisitions and Dispositions	9 Months Ended
	Sep. 30, 2022
Business Combinations [Abstract]
Acquisitions and Dispositions	3. Acquisitions 2022 Acquisitions Acquisition of Brand New Galaxy On April 19, 2022, the Company acquired Brand New Galaxy (“BNG”), for approximately $20,695 of cash consideration, as well as contingent consideration up to a maximum value of $50,000. The contingent consideration is due upon meeting certain future earnings targets through 2024, with approximately 67% payable in cash and 33% payable in Class A Common Stock. The consideration has been allocated to the assets acquired and assumed liabilities of BNG based upon preliminary estimated fair values, with any excess purchase price allocated to goodwill. The preliminary purchase price allocation is as follows: Amount Cash and cash equivalents $ 2,771 Accounts receivable 7,638 Other current assets 1,634 Fixed assets 2,338 Intangible assets 12,410 Other assets 1,416 Accounts payable (6,855) Accruals and other liabilities (4,896) Advance billings (1,095) Other liabilities (3,448) Net assets assumed 11,913 Goodwill 25,552 Purchase price consideration $ 37,465 The excess of purchase consideration over the fair value of the net assets acquired was recorded as goodwill, which is primarily attributed to the assembled workforce of BNG. Goodwill of $25,552 was assigned to the Brand Performance Network reportable segment. The majority of the goodwill is non-deductible for income tax purposes. Intangible assets consist of trade names and customer relationships. We amortize purchased intangible assets on a straight-line basis over their respective useful lives. The weighted average life of the total acquired identifiable intangible assets is ten years. The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Trade Names $ 5,930 10 Customer Relationships 5,390 11 Other 1,090 7 Total Acquired Intangible Assets $ 12,410 Pro Forma Financial Information (unaudited) The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, Nine Months Ended September 30, 2021 2022 2021 Revenue $ 473,539 $ 1,989,833 $ 878,610 Net Income 7,031 92,670 30,495 Revenue attributable to BNG, included within the three and nine months ended September 30, 2022 unaudited condensed consolidated statement of operations is $5,580 and $11,215, respectively and operating loss was $2,500 and $2,620, respectively. Acquisition of TMA Direct, Inc. On May 31, 2022, the Company acquired approximately 87% of TMA Direct, Inc. (“TMA Direct”) for approximately $17,247 of cash consideration and approximately $457 of deferred acquisition payments. The Company was also granted an option to purchase the remaining 13% minority interest in TMA Direct for up to approximately $13,330. The consideration has been allocated to the assets acquired and assumed liabilities of TMA Direct based upon preliminary estimated fair values, with any excess purchase price allocated to goodwill. The preliminary purchase price allocation is as follows: Amount Accounts receivable $ 582 Other current assets 669 Intangible assets 13,200 Accounts payable (379) Other liabilities (270) Noncontrolling interests (2,667) Net assets assumed 11,135 Goodwill 6,569 Purchase price consideration $ 17,704 The excess of purchase consideration over the fair value of the net assets acquired was recorded as goodwill, which is primarily attributed to the assembled workforce of TMA Direct. Goodwill of $6,569 was assigned to the Communications Network reportable segment. The majority of the goodwill is deductible for income tax purposes. Intangible assets consist of trade names and customer relationships. We amortize purchased intangible assets on a straight-line basis over their respective useful lives. The weighted average life of the total acquired identifiable intangible assets is ten years. The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Customer Relationships $ 11,400 10 Trade names 1,800 10 Total Acquired Intangible Assets $ 13,200 Pro Forma Financial Information (unaudited) The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, Nine Months Ended September 30, 2021 2022 2021 Revenue $ 468,862 $ 1,983,437 $ 867,533 Net Income 8,462 94,768 34,491 Revenue attributable to TMA Direct, included within the three and nine months ended September 30, 2022 unaudited condensed consolidated statement of operations is $3,774 and $5,026, respectively, and operating income was $1,369 and $1,626, respectively. Other Acquisitions On July 12, 2022, the Company acquired PEP Group Holdings B.V. (“PEP Group”), an omnichannel content creation and adaption production company for approximately $521, subject to post-closing adjustments, as well as contingent consideration up to a maximum value of $2,679. The contingent consideration is based on meeting certain future earnings targets through 2025. On July 15, 2022, the Company acquired Apollo Program II Inc. (“Apollo”), a real-time artificial intelligence-powered software-as-a-service platform, for approximately $2,300, subject to post-closing adjustments, as well as fixed deferred payments of $1,000 and $1,500 on or prior to July 1, 2023 and July 1, 2024, respectively. The estimates of fair value for the aforementioned acquisitions are subject to change and could be significant. The Company expects to complete the allocation of purchase price as soon as practicable, but no later than one year after the acquisition date. 2021 Acquisitions Acquisition of MDC On December 21, 2020, MDC and Stagwell Media announced that they had entered into the Transaction Agreement, providing for the combination of MDC with the operating businesses and subsidiaries of the Stagwell Subject Entities. The Stagwell Subject Entities comprised Stagwell Marketing and its direct and indirect subsidiaries. On August 2, 2021 (the “Closing Date”), we completed the combination of MDC and the Stagwell Subject Entities and a series of steps and related transactions (such combination and transactions, the “Transactions”). In connection with the Transactions, among other things, (i) MDC completed a series of transactions pursuant to which it emerged as a wholly owned subsidiary of the Company, converted into a Delaware limited liability company and changed its name to Midas OpCo Holdings LLC, and subsequently to Stagwell Global LLC (“OpCo”); (ii) Stagwell Media contributed the equity interests of Stagwell Marketing and its direct and indirect subsidiaries to OpCo; and (iii) the Company converted into a Delaware corporation, succeeded MDC as the publicly-traded company and changed its name to Stagwell Inc. In respect of the Transactions, the acquired assets and assumed liabilities, together with acquired processes and employees, represent a business as defined in the FASB’s Accounting Standards Codification (“ASC”) 805, Business Combinations (“ASC 805”). The Transactions were accounted for as a reverse acquisition using the acquisition method of accounting, pursuant to ASC Topic 805-10, Business Combinations, with MDC treated as the legal acquirer and SMG treated as the accounting acquirer. In identifying SMG as the acquiring entity for accounting purposes, MDC and SMG took into account a number of factors, including the relative voting rights and the corporate governance structure of the Company. SMG is considered the accounting acquirer since Stagwell Media controls the board of directors of the Company following the Transactions and received an indirect ownership interest in the Company’s only operating subsidiary, OpCo, of 69.55% ownership of OpCo’s common units. However, no single factor was the sole determinant in the overall conclusion that Stagwell is the acquirer for accounting purposes; rather all factors were considered in arriving at such conclusion. Under the acquisition method of accounting, the assets and liabilities of MDC, as the accounting acquiree, were recorded at their respective fair value as of the date the Transactions were completed. On August 2, 2021, an aggregate of 179,970 shares of the Company’s Class C Common Stock were issued to Stagwell Media in exchange for $1.80 (the “Stagwell New MDC Contribution”). The Class C Common Stock does not participate in the earnings of the Company. Additionally, an aggregate of 179,970 OpCo common units were issued to Stagwell Media in exchange for the equity interests of the Stagwell Subject Entities (the “Stagwell OpCo Contribution”). The fair value of the purchase consideration is $429,062, consisting of approximately 80,000 shares of the Company’s Class A and B Common Stock and Common Stock equivalents based on a per share price of approximately $5.42, the closing stock price on the date of the combination. ASC 805 requires the allocation of the purchase price consideration to the fair value of the identified assets acquired and liabilities assumed upon consummation of a business combination. For this purpose, fair value shall be determined in accordance with the fair value concepts defined in ASC 820, “Fair Value Measurements and Disclosures,” (“ASC 820”). Fair value is defined in ASC 820 as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” Fair value measurements can be highly subjective and can involve a high degree of estimation. The purchase price valuation was completed during the third quarter of 2022. The purchase price allocation is as follows: Amount Cash and cash equivalents $ 130,197 Accounts receivable 398,736 Other current assets 41,291 Fixed assets 81,343 Right-of-use lease assets - operating leases 252,739 Intangible assets 810,900 Other assets 18,282 Accounts payable (139,590) Accruals and other liabilities (307,439) Advance billings (211,212) Current portion of lease liabilities (54,009) Current portion of deferred acquisition consideration (53,054) Long-term debt (901,736) Revolving credit facility (109,954) Long-term portion of deferred acquisition consideration (8,056) Long-term portion of lease liabilities (283,637) Other liabilities (139,026) Redeemable noncontrolling interests (25,990) Preferred shares (209,980) Noncontrolling interests (151,090) Net liabilities assumed (861,285) Goodwill 1,290,347 Purchase price consideration $ 429,062 The excess of purchase consideration over the fair value of the net assets acquired was recorded as goodwill, which is primarily attributed to the assembled workforce of MDC. Goodwill of $932,582, $285,396 and $72,369 was assigned to the Integrated Agencies Network, the Brand Performance Network and the Communications Network reportable segments, respectively. The majority of the goodwill is non-deductible for income tax purposes. Goodwill has been reduced from the reported amount as of June 30, 2022 of $1,298,370 primarily to reflect the finalization of the assessment of certain tax positions and the related deferred taxes, as well as the finalization of the valuation of certain assets and liabilities in the Brand Performance Network. There has been no change that impacts the Consolidated Statement of Operations. Intangible assets consist of trade names and customer relationships. We amortize purchased intangible assets on a straight-line basis over their respective useful lives. The weighted average life of the total acquired identifiable intangible assets is thirteen years. The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Trade Names $ 98,000 10 Customer Relationships 712,900 6-15 Total Acquired Intangible Assets $ 810,900 Pro Forma Financial Information (unaudited) The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, 2021 Nine Months Ended September 30, 2021 Revenue $ 568,424 $ 1,612,399 The pro forma net loss was nominal for the three and nine months ended September 30, 2021. Revenue attributable to MDC, included within the three and nine months ended September 30, 2021 unaudited condensed consolidated statement of operations is $342,539 and $995,729, respectively and operating income was $17,506 and $77,817, respectively. Acquisition of GoodStuff Holdings Limited On December 31, 2021, the Company acquired GoodStuff Holdings Limited (“Goodstuff”) for approximately £21,000 (approximately $28,188) of cash consideration as well as contingent consideration up to a maximum of £22,000. The cash consideration included an initial payment of £8,000, an excess working capital payment of approximately £9,000 and approximately £4,000 of deferred payments. The contingent consideration is tied to employees’ service and will be recognized as deferred acquisition consideration expense through 2026. Therefore, only the cash consideration has been allocated to the assets acquired and assumed liabilities of Goodstuff based upon preliminary estimated fair values, with any excess purchase price allocated to goodwill. The preliminary purchase price allocation is as follows: Amount Cash and cash equivalents $ 30,985 Accounts receivable 28,685 Other current assets 3,207 Fixed assets 237 Right-of-use lease assets - operating leases 2,060 Intangible assets 14,974 Other assets 55 Accounts payable (6,344) Accruals and other liabilities (27,353) Advance billings (15,956) Current portion of lease liabilities (857) Income taxes payable (967) Long-term portion of lease liabilities (3,744) Other liabilities (1,204) Net assets assumed 23,778 Goodwill 4,410 Purchase price consideration $ 28,188 The excess of purchase consideration over the fair value of the net assets acquired was recorded as goodwill, which is primarily attributed to the assembled workforce of Goodstuff. Goodwill of $4,410 was assigned to the Brand Performance Network reportable segment. The majority of the goodwill is non-deductible for income tax purposes. Intangible assets consist of trade names and customer relationships. We amortize purchased intangible assets on a straight-line basis over their respective useful lives. The weighted average life of the total acquired identifiable intangible assets is ten years. The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Trade Names $ 1,349 15 Customer Relationships 13,625 10 Total Acquired Intangible Assets $ 14,974 Pro Forma Financial Information (unaudited) The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, 2021 Nine Months Ended September 30, 2021 Revenue $ 471,406 $ 872,192 Net Income 8,357 33,894 2022 Purchases of Noncontrolling Interests On April 1, 2022, the Company acquired the remaining interest in Hello Design, LLC (“Hello Design”) that it did not already own for an aggregate purchase price of $4,600, comprised of a closing cash payment of $3,600 and a contingent deferred acquisition payment of $1,000. The contingent deferred payment will be based on the financial results of the underlying business through the end of 2022 with the payment due in 2023. 2021 Purchases of Noncontrolling Interests On October 1, 2021, the Company entered into an agreement to purchase the approximate 27% remaining interest of Targeted Victory it did not already own, stipulating the purchase of 13.3% on October 1, 2021 and the remaining 13.3% on July 31, 2023, with the option for the seller to delay the second purchase until July 31, 2025. The purchase price of $73,898 was comprised of a contingent deferred acquisition payment and redeemable noncontrolling interest with estimated present values at the acquisition date of $46,618 and $27,280, respectively. The contingent deferred payment and redeemable noncontrolling interest were based on the financial results of the underlying business through 2025. In addition, at the option of the Company, up to 50% of the total purchase price can be paid in shares of Class A Common Stock and in no event may the purchase price exceed $135,000. On December 1, 2021, the Company acquired the approximate 27% remaining interest of Concentric it did not already own for an aggregate purchase price of $8,058, comprised of a closing cash payment of $1,581 and contingent deferred acquisition payments with an estimated present value at the acquisition date of $6,477. The contingent deferred payments were based on the financial results of the underlying business through 2022 with final payment due in 2023. On December 31, 2021, the Company acquired the approximate 49% remaining interest of Instrument it did not already own for an aggregate purchase price of $157,072, comprised of a closing payment of $37,500 in cash and $37,500 in shares of Class A Common Stock and deferred acquisition payments with an estimated present value at the acquisition date of $82,072. The deferred payments are not contingent and will be paid in 2023 and 2024. 6. Deferred Acquisition Consideration Deferred acquisition consideration on the balance sheet consists of deferred obligations related to contingent and fixed purchase price payments, and 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. 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 September 30, 2022 and December 31, 2021: September 30, December 31, 2021 Beginning balance of contingent payments $ 222,369 $ 17,847 Payments (71,865) (12,431) Adjustment to deferred acquisition consideration (1) (13,793) 18,721 Additions (2) 24,594 198,937 Currency Translation Adjustment (1,576) — Other (140) (705) Ending balance of contingent payments (3) $ 159,589 $ 222,369 (1) Adjustment to deferred acquisition consideration contains fair value changes from the Company’s initial estimates of deferred acquisition payments. Adjustment to deferred acquisition consideration is recorded within Office and general expenses on the Unaudited Condensed Consolidated Statements of Operations. (2) In 2021, approximately $61,000 of additions represent deferred acquisition consideration acquired in connection with the acquisition of MDC. Approximately $136,000 of additions represent deferred acquisition consideration acquired in connection with the purchases of noncontrolling interests. See Note 3 of the Notes included herein for additional information related to the purchases of Concentric, Targeted Victory, and Instrument. In 2022, approximately 22,014 of additions represent deferred acquisition consideration acquired in connection with the acquisitions of BNG, Apollo, and PEP Group. See Note 3 of the Notes included herein for additional information related to these purchases. (3) As of September 30, 2022, approximately, $42,356 of the deferred acquisition consideration is expected to be settled in the Company’s in Class A Common Stock.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue	4. 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 Stagwell 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. Certain of the Company’s contracts consist of a single performance obligation. In these instances, the Company does not consider the underlying activities as separate or distinct performance obligations because its services are highly interrelated, and the integration of the various components is essential to the overall promise to the Company’s customer. In certain of the Company’s client contracts, the performance obligation is a stand-ready obligation because the Company provides a constant level of similar services over the term of the contract. 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. To a lesser extent, revenue is recognized using output measures, such as impressions or ongoing reporting. For client contracts when the Company has a stand-ready obligation to perform services on an ongoing basis over the life of the contract, where the scope of these arrangements includes an undefined number of broad activities and there are no significant gaps in performing the services, the Company recognizes revenue ratably using a time-based measure. In addition, for client contracts where the Company is providing online subscription-based hosted services, it recognizes revenue ratably over the contract term. 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 Stagwell’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 Stagwell’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. Typically, 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 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 Brands. Representation of a client rarely means that Stagwell handles marketing communications for all Brands or product lines of the client in every geographical location. The Company’s Brands often cooperate with one another through referrals and the sharing of both services and expertise, which enables Stagwell 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 Stagwell network. The following table presents revenue disaggregated by our principal capabilities for the three and nine months ended September 30, 2022 and 2021: Three Months Ended September 30, Nine Months Ended September 30, Principal Capabilities Reportable Segment 2022 2021 2022 2021 Digital Transformation All Segments $ 197,337 $ 124,268 $ 606,061 $ 256,966 Creativity and Communications Integrated Agencies Network, Brand Performance Network, Communications Network 304,048 208,424 890,692 261,080 Performance Media and Data Brand Performance Network 111,548 88,139 325,584 222,186 Consumer Insights and Strategy Integrated Agencies Network 50,858 45,803 157,270 117,204 $ 663,791 $ 466,634 $ 1,979,607 $ 857,436 Stagwell 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. Stagwell’s Brands are located in the United States and United Kingdom, and more than thirty other 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 and nine months ended September 30, 2022 and 2021: Three Months Ended September 30, Nine Months Ended September 30, Geographical Location Reportable Segment 2022 2021 2022 2021 United States All $ 553,744 $ 387,662 $ 1,650,610 $ 733,038 United Kingdom All 42,774 32,218 125,950 62,416 Other All 67,273 46,754 203,047 61,982 $ 663,791 $ 466,634 $ 1,979,607 $ 857,436 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 $179,878 and $116,558 at September 30, 2022 and December 31, 2021, 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 $57,873 and $63,065 at September 30, 2022 and December 31, 2021, 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 received from or billed to clients in excess of fees recognized. Such fees are classified as Advance billings presented on the Company’s Unaudited Condensed Consolidated Balance Sheets. In arrangements in which we are acting as an agent, the recognition related to the contract liability is presented on a net basis within the Unaudited Condensed Consolidated Statements of Operations. Advance billings at September 30, 2022 and December 31, 2021 were $340,675 and $361,885, respectively. The decrease in the Advance billings balance of $21,210 for the nine months ended September 30, 2022 was primarily driven by cash payments received or due in advance of satisfying our performance obligations, offset by $323,734 of revenues recognized that were included in the Advance billings balances as of December 31, 2021 and reductions due to the incurrence of third-party costs. Changes in the contract asset and liability balances during the nine months ended September 30, 2022 were not materially impacted by write offs, impairment losses or any other factors. Unsatisfied Performance Obligations 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 $42,438 of unsatisfied performance obligations as of September 30, 2022 of which we expect to recognize approximately 32% in the remaining quarters of 2022, 56% in 2023 and 12% in 2024.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Earnings Per Share	5. Earnings Per Share The following table sets forth the computations of basic and diluted income per common share for the three and nine months ended September 2022: Three Months Ended September 30, Nine Months Ended September 30, 2022 2022 Earnings Per Share - Basic Numerator: Net income $ 35,274 $ 93,415 Net income attributable to Class C shareholders (19,286) (51,027) Net loss attributable to other equity interest holders (5,379) (8,641) Net income attributable to noncontrolling and redeemable noncontrolling interests (24,665) (59,668) Net income attributable to Stagwell Inc. common shareholders $ 10,609 $ 33,747 Denominator: Weighted Average number of common shares outstanding 125,384 124,710 Earnings Per Share - Basic $ 0.08 $ 0.27 Earnings Per Share - Diluted Numerator: Net income attributable to Stagwell Inc. common shareholders $ 10,609 $ 33,747 Denominator: Basic - Weighted Average number of common shares outstanding 125,384 124,710 Dilutive shares: Stock appreciation rights 1,837 1,885 Restricted share and restricted unit awards 3,277 4,955 Diluted - Weighted average number of common shares outstanding 130,498 131,550 Earnings Per Share - Diluted $ 0.08 $ 0.26 Restricted stock awards of 2,340 as of September 30, 2022 are excluded from the computation of diluted income per common share because the performance contingency necessary for vesting had not been met as of the reporting date. The following table sets forth the computations of basic and diluted income per common share for the three and nine months ended September 2021: Three Months Ended September 30, Nine Months Ended September 30, 2021 2021 Numerator: Net loss attributable to Stagwell Inc. common shareholders $ (4,545) $ (4,545) Denominator: Weighted average number of common shares outstanding 76,106 76,106 Loss Per Share - Basic & Diluted $ (0.06) $ (0.06) Anti-dilutive: Class C shares 179,970 179,970 Stock Appreciation Rights and Restricted Awards 6,596 6,596 The combination of MDC and SMG, completed on August 2, 2021, was treated as a reverse acquisition for financial reporting purposes. SMG was treated as the accounting acquirer and MDC as the accounting acquiree. Therefore, under applicable accounting principles, the historical financial results of SMG prior to August 2, 2021 are considered our historical financial results. Accordingly, historical information presented in this Form 10-Q for events occurring or periods ending before August 2, 2021 does not reflect the impact of the Transactions or the financial results of MDC and may not be comparable with historical information for events occurring or periods ending on or after August 2, 2021. SMG’s equity structure, prior to the combination with MDC, was a non-unitized single member limited liability company, resulting in all components of equity attributable to the member being reported within Members’ Capital. Given that SMG was a non-unitized single member limited liability company, net income (loss) prior to the combination is not applicable for purposes of calculating earnings per share. Therefore, the net income (loss) in the table above includes the income or loss for the period beginning on the acquisition date through the end of the respective reporting period and as such will not reconcile to the respective amounts presented within the Unaudited Condensed Consolidated Statements of Operations.

Deferred Acquisition Considerat

Deferred Acquisition Consideration	9 Months Ended
	Sep. 30, 2022
Business Combinations [Abstract]
Deferred Acquisition Consideration	3. Acquisitions 2022 Acquisitions Acquisition of Brand New Galaxy On April 19, 2022, the Company acquired Brand New Galaxy (“BNG”), for approximately $20,695 of cash consideration, as well as contingent consideration up to a maximum value of $50,000. The contingent consideration is due upon meeting certain future earnings targets through 2024, with approximately 67% payable in cash and 33% payable in Class A Common Stock. The consideration has been allocated to the assets acquired and assumed liabilities of BNG based upon preliminary estimated fair values, with any excess purchase price allocated to goodwill. The preliminary purchase price allocation is as follows: Amount Cash and cash equivalents $ 2,771 Accounts receivable 7,638 Other current assets 1,634 Fixed assets 2,338 Intangible assets 12,410 Other assets 1,416 Accounts payable (6,855) Accruals and other liabilities (4,896) Advance billings (1,095) Other liabilities (3,448) Net assets assumed 11,913 Goodwill 25,552 Purchase price consideration $ 37,465 The excess of purchase consideration over the fair value of the net assets acquired was recorded as goodwill, which is primarily attributed to the assembled workforce of BNG. Goodwill of $25,552 was assigned to the Brand Performance Network reportable segment. The majority of the goodwill is non-deductible for income tax purposes. Intangible assets consist of trade names and customer relationships. We amortize purchased intangible assets on a straight-line basis over their respective useful lives. The weighted average life of the total acquired identifiable intangible assets is ten years. The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Trade Names $ 5,930 10 Customer Relationships 5,390 11 Other 1,090 7 Total Acquired Intangible Assets $ 12,410 Pro Forma Financial Information (unaudited) The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, Nine Months Ended September 30, 2021 2022 2021 Revenue $ 473,539 $ 1,989,833 $ 878,610 Net Income 7,031 92,670 30,495 Revenue attributable to BNG, included within the three and nine months ended September 30, 2022 unaudited condensed consolidated statement of operations is $5,580 and $11,215, respectively and operating loss was $2,500 and $2,620, respectively. Acquisition of TMA Direct, Inc. On May 31, 2022, the Company acquired approximately 87% of TMA Direct, Inc. (“TMA Direct”) for approximately $17,247 of cash consideration and approximately $457 of deferred acquisition payments. The Company was also granted an option to purchase the remaining 13% minority interest in TMA Direct for up to approximately $13,330. The consideration has been allocated to the assets acquired and assumed liabilities of TMA Direct based upon preliminary estimated fair values, with any excess purchase price allocated to goodwill. The preliminary purchase price allocation is as follows: Amount Accounts receivable $ 582 Other current assets 669 Intangible assets 13,200 Accounts payable (379) Other liabilities (270) Noncontrolling interests (2,667) Net assets assumed 11,135 Goodwill 6,569 Purchase price consideration $ 17,704 The excess of purchase consideration over the fair value of the net assets acquired was recorded as goodwill, which is primarily attributed to the assembled workforce of TMA Direct. Goodwill of $6,569 was assigned to the Communications Network reportable segment. The majority of the goodwill is deductible for income tax purposes. Intangible assets consist of trade names and customer relationships. We amortize purchased intangible assets on a straight-line basis over their respective useful lives. The weighted average life of the total acquired identifiable intangible assets is ten years. The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Customer Relationships $ 11,400 10 Trade names 1,800 10 Total Acquired Intangible Assets $ 13,200 Pro Forma Financial Information (unaudited) The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, Nine Months Ended September 30, 2021 2022 2021 Revenue $ 468,862 $ 1,983,437 $ 867,533 Net Income 8,462 94,768 34,491 Revenue attributable to TMA Direct, included within the three and nine months ended September 30, 2022 unaudited condensed consolidated statement of operations is $3,774 and $5,026, respectively, and operating income was $1,369 and $1,626, respectively. Other Acquisitions On July 12, 2022, the Company acquired PEP Group Holdings B.V. (“PEP Group”), an omnichannel content creation and adaption production company for approximately $521, subject to post-closing adjustments, as well as contingent consideration up to a maximum value of $2,679. The contingent consideration is based on meeting certain future earnings targets through 2025. On July 15, 2022, the Company acquired Apollo Program II Inc. (“Apollo”), a real-time artificial intelligence-powered software-as-a-service platform, for approximately $2,300, subject to post-closing adjustments, as well as fixed deferred payments of $1,000 and $1,500 on or prior to July 1, 2023 and July 1, 2024, respectively. The estimates of fair value for the aforementioned acquisitions are subject to change and could be significant. The Company expects to complete the allocation of purchase price as soon as practicable, but no later than one year after the acquisition date. 2021 Acquisitions Acquisition of MDC On December 21, 2020, MDC and Stagwell Media announced that they had entered into the Transaction Agreement, providing for the combination of MDC with the operating businesses and subsidiaries of the Stagwell Subject Entities. The Stagwell Subject Entities comprised Stagwell Marketing and its direct and indirect subsidiaries. On August 2, 2021 (the “Closing Date”), we completed the combination of MDC and the Stagwell Subject Entities and a series of steps and related transactions (such combination and transactions, the “Transactions”). In connection with the Transactions, among other things, (i) MDC completed a series of transactions pursuant to which it emerged as a wholly owned subsidiary of the Company, converted into a Delaware limited liability company and changed its name to Midas OpCo Holdings LLC, and subsequently to Stagwell Global LLC (“OpCo”); (ii) Stagwell Media contributed the equity interests of Stagwell Marketing and its direct and indirect subsidiaries to OpCo; and (iii) the Company converted into a Delaware corporation, succeeded MDC as the publicly-traded company and changed its name to Stagwell Inc. In respect of the Transactions, the acquired assets and assumed liabilities, together with acquired processes and employees, represent a business as defined in the FASB’s Accounting Standards Codification (“ASC”) 805, Business Combinations (“ASC 805”). The Transactions were accounted for as a reverse acquisition using the acquisition method of accounting, pursuant to ASC Topic 805-10, Business Combinations, with MDC treated as the legal acquirer and SMG treated as the accounting acquirer. In identifying SMG as the acquiring entity for accounting purposes, MDC and SMG took into account a number of factors, including the relative voting rights and the corporate governance structure of the Company. SMG is considered the accounting acquirer since Stagwell Media controls the board of directors of the Company following the Transactions and received an indirect ownership interest in the Company’s only operating subsidiary, OpCo, of 69.55% ownership of OpCo’s common units. However, no single factor was the sole determinant in the overall conclusion that Stagwell is the acquirer for accounting purposes; rather all factors were considered in arriving at such conclusion. Under the acquisition method of accounting, the assets and liabilities of MDC, as the accounting acquiree, were recorded at their respective fair value as of the date the Transactions were completed. On August 2, 2021, an aggregate of 179,970 shares of the Company’s Class C Common Stock were issued to Stagwell Media in exchange for $1.80 (the “Stagwell New MDC Contribution”). The Class C Common Stock does not participate in the earnings of the Company. Additionally, an aggregate of 179,970 OpCo common units were issued to Stagwell Media in exchange for the equity interests of the Stagwell Subject Entities (the “Stagwell OpCo Contribution”). The fair value of the purchase consideration is $429,062, consisting of approximately 80,000 shares of the Company’s Class A and B Common Stock and Common Stock equivalents based on a per share price of approximately $5.42, the closing stock price on the date of the combination. ASC 805 requires the allocation of the purchase price consideration to the fair value of the identified assets acquired and liabilities assumed upon consummation of a business combination. For this purpose, fair value shall be determined in accordance with the fair value concepts defined in ASC 820, “Fair Value Measurements and Disclosures,” (“ASC 820”). Fair value is defined in ASC 820 as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” Fair value measurements can be highly subjective and can involve a high degree of estimation. The purchase price valuation was completed during the third quarter of 2022. The purchase price allocation is as follows: Amount Cash and cash equivalents $ 130,197 Accounts receivable 398,736 Other current assets 41,291 Fixed assets 81,343 Right-of-use lease assets - operating leases 252,739 Intangible assets 810,900 Other assets 18,282 Accounts payable (139,590) Accruals and other liabilities (307,439) Advance billings (211,212) Current portion of lease liabilities (54,009) Current portion of deferred acquisition consideration (53,054) Long-term debt (901,736) Revolving credit facility (109,954) Long-term portion of deferred acquisition consideration (8,056) Long-term portion of lease liabilities (283,637) Other liabilities (139,026) Redeemable noncontrolling interests (25,990) Preferred shares (209,980) Noncontrolling interests (151,090) Net liabilities assumed (861,285) Goodwill 1,290,347 Purchase price consideration $ 429,062 The excess of purchase consideration over the fair value of the net assets acquired was recorded as goodwill, which is primarily attributed to the assembled workforce of MDC. Goodwill of $932,582, $285,396 and $72,369 was assigned to the Integrated Agencies Network, the Brand Performance Network and the Communications Network reportable segments, respectively. The majority of the goodwill is non-deductible for income tax purposes. Goodwill has been reduced from the reported amount as of June 30, 2022 of $1,298,370 primarily to reflect the finalization of the assessment of certain tax positions and the related deferred taxes, as well as the finalization of the valuation of certain assets and liabilities in the Brand Performance Network. There has been no change that impacts the Consolidated Statement of Operations. Intangible assets consist of trade names and customer relationships. We amortize purchased intangible assets on a straight-line basis over their respective useful lives. The weighted average life of the total acquired identifiable intangible assets is thirteen years. The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Trade Names $ 98,000 10 Customer Relationships 712,900 6-15 Total Acquired Intangible Assets $ 810,900 Pro Forma Financial Information (unaudited) The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, 2021 Nine Months Ended September 30, 2021 Revenue $ 568,424 $ 1,612,399 The pro forma net loss was nominal for the three and nine months ended September 30, 2021. Revenue attributable to MDC, included within the three and nine months ended September 30, 2021 unaudited condensed consolidated statement of operations is $342,539 and $995,729, respectively and operating income was $17,506 and $77,817, respectively. Acquisition of GoodStuff Holdings Limited On December 31, 2021, the Company acquired GoodStuff Holdings Limited (“Goodstuff”) for approximately £21,000 (approximately $28,188) of cash consideration as well as contingent consideration up to a maximum of £22,000. The cash consideration included an initial payment of £8,000, an excess working capital payment of approximately £9,000 and approximately £4,000 of deferred payments. The contingent consideration is tied to employees’ service and will be recognized as deferred acquisition consideration expense through 2026. Therefore, only the cash consideration has been allocated to the assets acquired and assumed liabilities of Goodstuff based upon preliminary estimated fair values, with any excess purchase price allocated to goodwill. The preliminary purchase price allocation is as follows: Amount Cash and cash equivalents $ 30,985 Accounts receivable 28,685 Other current assets 3,207 Fixed assets 237 Right-of-use lease assets - operating leases 2,060 Intangible assets 14,974 Other assets 55 Accounts payable (6,344) Accruals and other liabilities (27,353) Advance billings (15,956) Current portion of lease liabilities (857) Income taxes payable (967) Long-term portion of lease liabilities (3,744) Other liabilities (1,204) Net assets assumed 23,778 Goodwill 4,410 Purchase price consideration $ 28,188 The excess of purchase consideration over the fair value of the net assets acquired was recorded as goodwill, which is primarily attributed to the assembled workforce of Goodstuff. Goodwill of $4,410 was assigned to the Brand Performance Network reportable segment. The majority of the goodwill is non-deductible for income tax purposes. Intangible assets consist of trade names and customer relationships. We amortize purchased intangible assets on a straight-line basis over their respective useful lives. The weighted average life of the total acquired identifiable intangible assets is ten years. The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Trade Names $ 1,349 15 Customer Relationships 13,625 10 Total Acquired Intangible Assets $ 14,974 Pro Forma Financial Information (unaudited) The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, 2021 Nine Months Ended September 30, 2021 Revenue $ 471,406 $ 872,192 Net Income 8,357 33,894 2022 Purchases of Noncontrolling Interests On April 1, 2022, the Company acquired the remaining interest in Hello Design, LLC (“Hello Design”) that it did not already own for an aggregate purchase price of $4,600, comprised of a closing cash payment of $3,600 and a contingent deferred acquisition payment of $1,000. The contingent deferred payment will be based on the financial results of the underlying business through the end of 2022 with the payment due in 2023. 2021 Purchases of Noncontrolling Interests On October 1, 2021, the Company entered into an agreement to purchase the approximate 27% remaining interest of Targeted Victory it did not already own, stipulating the purchase of 13.3% on October 1, 2021 and the remaining 13.3% on July 31, 2023, with the option for the seller to delay the second purchase until July 31, 2025. The purchase price of $73,898 was comprised of a contingent deferred acquisition payment and redeemable noncontrolling interest with estimated present values at the acquisition date of $46,618 and $27,280, respectively. The contingent deferred payment and redeemable noncontrolling interest were based on the financial results of the underlying business through 2025. In addition, at the option of the Company, up to 50% of the total purchase price can be paid in shares of Class A Common Stock and in no event may the purchase price exceed $135,000. On December 1, 2021, the Company acquired the approximate 27% remaining interest of Concentric it did not already own for an aggregate purchase price of $8,058, comprised of a closing cash payment of $1,581 and contingent deferred acquisition payments with an estimated present value at the acquisition date of $6,477. The contingent deferred payments were based on the financial results of the underlying business through 2022 with final payment due in 2023. On December 31, 2021, the Company acquired the approximate 49% remaining interest of Instrument it did not already own for an aggregate purchase price of $157,072, comprised of a closing payment of $37,500 in cash and $37,500 in shares of Class A Common Stock and deferred acquisition payments with an estimated present value at the acquisition date of $82,072. The deferred payments are not contingent and will be paid in 2023 and 2024. 6. Deferred Acquisition Consideration Deferred acquisition consideration on the balance sheet consists of deferred obligations related to contingent and fixed purchase price payments, and 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. 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 September 30, 2022 and December 31, 2021: September 30, December 31, 2021 Beginning balance of contingent payments $ 222,369 $ 17,847 Payments (71,865) (12,431) Adjustment to deferred acquisition consideration (1) (13,793) 18,721 Additions (2) 24,594 198,937 Currency Translation Adjustment (1,576) — Other (140) (705) Ending balance of contingent payments (3) $ 159,589 $ 222,369 (1) Adjustment to deferred acquisition consideration contains fair value changes from the Company’s initial estimates of deferred acquisition payments. Adjustment to deferred acquisition consideration is recorded within Office and general expenses on the Unaudited Condensed Consolidated Statements of Operations. (2) In 2021, approximately $61,000 of additions represent deferred acquisition consideration acquired in connection with the acquisition of MDC. Approximately $136,000 of additions represent deferred acquisition consideration acquired in connection with the purchases of noncontrolling interests. See Note 3 of the Notes included herein for additional information related to the purchases of Concentric, Targeted Victory, and Instrument. In 2022, approximately 22,014 of additions represent deferred acquisition consideration acquired in connection with the acquisitions of BNG, Apollo, and PEP Group. See Note 3 of the Notes included herein for additional information related to these purchases. (3) As of September 30, 2022, approximately, $42,356 of the deferred acquisition consideration is expected to be settled in the Company’s in Class A Common Stock.

Leases

Leases	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Leases	7. Leases The Company leases office space in North America, Europe, Asia, South America, Africa 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 2022 through 2034. 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 non-cancellable 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 2044. 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 with unrelated third parties. These leases are classified as operating leases and expire between years 2022 through 2032. Sublease income is recognized over the lease term on a straight-line basis. Currently, the Company subleases office space in North America and Europe. As of September 30, 2022, the Company has entered into one operating lease for which the commencement date has not yet occurred primarily because the premises is in the process of being prepared for occupancy by the landlord. Accordingly, this one lease represents an obligation of the Company that is not reflected within the Unaudited Condensed Consolidated Balance Sheets as of September 30, 2022. The aggregate future liability related to this lease is approximately $1,167. 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 and nine months ended September 30, 2022 and 2021: Three Months Nine Months 2022 2021 2022 2021 Lease Cost: Operating lease cost $ 19,966 $ 13,502 $ 54,929 $ 27,779 Variable lease cost 4,759 3,230 13,963 5,167 Sublease rental income (3,636) (2,359) (11,128) (4,290) Total lease cost $ 21,089 $ 14,373 $ 57,764 $ 28,656 Additional information: Cash paid for amounts included in the measurement of lease liabilities for operating leases Operating cash flows $ 22,694 $ 16,490 $ 69,827 $ 29,854 Right-of-use lease assets obtained in exchange for operating lease liabilities and other non-cash adjustments $ 5,189 $ 353,984 $ 27,878 $ 353,984 As of September 30, 2022, the weighted average remaining lease term (in years) and weighted average discount rate were 6.4 and 4.3%, respectively. 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. In the three and nine months ended September 30, 2022, the Company recorded a charge of $1,734 and $2,014, respectively, primarily to reduce the carrying value of one of its right-of-use lease assets and related leasehold improvements. This right-of-use lease asset related to an agency within the Integrated Agencies Network. As a result of subleasing the space, the Company evaluated the facts and circumstances related to the use of the assets which indicated that they may not be recoverable. Using the sublease income to develop expected future cash flows, it was determined that the fair value of the asset was less than its carrying value. This impairment charge is included in Impairment and other losses within the Unaudited Condensed Consolidated Statements of Operations. The following table presents minimum future rental payments under the Company’s leases at September 30, 2022 and their reconciliation to the corresponding lease liabilities: Maturity Analysis Remaining 2022 $ 20,551 2023 88,697 2024 75,684 2025 59,203 2026 44,170 2027 and thereafter 158,858 Total 447,163 Less: Present value discount (65,342) Lease liability $ 381,821

Debt

Debt	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Debt	8. Debt As of September 30, 2022 and December 31, 2021, the Company’s indebtedness was comprised as follows: September 30, December 31, 2021 Revolving credit facility $ 245,000 $ 110,165 5.625% Notes 1,100,000 1,100,000 Debt issuance costs (15,866) (18,564) Total long-term debt $ 1,329,134 $ 1,191,601 Interest expense related to long-term debt included in Interest expense, net on the Unaudited Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2022 was $19,022 and $54,918, respectively, and for the three and nine months ended September 30, 2021 was $9,913 and $15,560, respectively. The amortization of debt issuance costs included in Interest expense, net on the Unaudited Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2022 was $573 and $1,784, respectively, and for the three and nine months ended September 30, 2021 was $1,623 and $2,092, respectively. Revolving Credit Agreement On November 18, 2019, the Company entered into a debt agreement (“JPM Syndicated Facility”) with a syndicate of banks led by JPMorgan Chase Bank, N.A (“JPM”). The JPM Syndicated Facility consisted of a five-year revolving credit facility of $265,000 (“JPM Revolver”) with the right to be increased by an additional $150,000. On March 18, 2020, the Company increased the commitments on the JPM Revolver by $60,000 to $325,000. On August 2, 2021, in connection with the closing of the acquisition of MDC, the Company entered into an amended and restated credit agreement (the “Combined Credit Agreement”) with a syndicate of banks led by JPM to increase commitments on the existing JPM Revolver. The Combined Credit Agreement consists of a $500,000 senior secured revolving credit facility with a five-year maturity. The Combined Credit Agreement contains sub-limits for revolving loans and letters of credit of $50,000 for loans denominated in pounds sterling or euros. It also includes an accordion feature under which the Company may request, subject to lender approval and certain conditions, to increase the amount of the commitments to an aggregate amount not to exceed $650,000. On April 28, 2022, the Company amended the Combined Credit Agreement. Among other things, this amendment replaced any references to LIBOR with references to SOFR. Borrowings pursuant to the Combined Credit Agreement, as amended, bear interest at a rate equal to, at the Company’s option, (i) the greatest of (a) the prime rate of interest in effect on such day, (b) the federal funds effective rate plus 0.50% and (c) SOFR plus 1% in each case, plus the applicable margin (calculated based on the Company’s Total Leverage Ratio, as defined in the Combined Credit Agreement) at that time. Additionally, the Combined Credit Agreement was amended to remove certain pre-commencement notice provisions for certain acquisitions under $50,000 in the aggregate, increased the amount permitted for certain investments allowed under the Combined Credit Agreement, and, subject to certain conditions, to allow for the repurchase of Stagwell Inc. stock in an amount not to exceed $100,000 in any fiscal year. All other substantive terms of the Combined Credit Agreement remain unchanged. Prior to April 28, 2022, borrowings under the Combined Credit Agreement bore interest at a rate equal to, at the Company’s option, (i) the greatest of (a) the prime rate of interest announced from time to time by JPM, (b) the federal funds effective rate from time to time plus 0.50% and (c) the LIBOR rate plus 1%, in each case, plus the applicable margin (calculated based on the Company’s total leverage ratio) at that time or (ii) the LIBOR rate plus the applicable margin (calculated based on the Company’s total leverage ratio) at that time. Advances under the Combined Credit Agreement may be prepaid in whole or in part from time to time without penalty or premium. The Combined Credit Agreement commitment may be reduced by the Company from time to time. Principal amounts outstanding under the Combined Credit Agreement are due and payable in full at maturity within five years of the date of the Combined Credit Agreement. If an event of default occurs under the Combined Credit Agreement or any future secured indebtedness, the holders of such secured indebtedness will have a prior right to our assets securing such indebtedness, to the exclusion of the holders of the 5.625% Notes (as defined below), even if we are in default with respect to the 5.625% Notes. In that event, our assets securing such indebtedness would first be used to repay in full all indebtedness and other obligations secured by them (including all amounts outstanding under the Combined Credit Agreement), resulting in all or a portion of our assets being unavailable to satisfy the claims of the holders of the 5.625% Notes and other unsecured indebtedness. The Combined Credit Agreement contains a number of financial and nonfinancial covenants and is guaranteed by substantially all of our present and future subsidiaries, subject to customary exceptions. The Company was in compliance with all covenants at September 30, 2022. A portion of the Combined Credit Agreement in an amount not to exceed $50,000 is available for the issuance of standby letters of credit. At September 30, 2022 and December 31, 2021, the Company had issued undrawn outstanding letters of credit of $24,973 and $24,332, respectively. Senior Notes In August 2021, the Company issued $1,100,000 aggregate principal amount of 5.625% senior notes (“5.625% Notes”). A portion of the proceeds from the issuance of the 5.625% Notes was used to redeem $870,300 aggregate principal amount of the outstanding 7.50% Senior Notes due 2024 (the “Existing Notes”) for a price of $904,200. This price is equal to 101.625% of the outstanding principal amount of the Existing Notes being redeemed, plus, accrued, and unpaid interest on the principal amount of such Existing Notes. The Company did not recognize a gain or loss on redemption. The 5.625% Notes are due August 15, 2029 and bear interest of 5.625% to be paid on February 15 and August 15 of each year, commencing on February 15, 2022. The 5.625% Notes are guaranteed on a senior unsecured basis by substantially all of the Company’s subsidiaries. The 5.625% Notes rank (i) equally in right of payment with all of the Company’s or any guarantor’s existing and future unsubordinated indebtedness, (ii) senior in right of payment to the Company’s or any guarantor’s existing and future subordinated indebtedness, (iii) effectively subordinated to any of the Company’s or any guarantor’s existing and future secured indebtedness to the extent of the collateral securing such indebtedness, including the Combined Credit Agreement, and (iv) structurally subordinated to all existing and future liabilities of the Company’s subsidiaries that are not guarantors. Our obligations under the 5.625% Notes are unsecured and are effectively junior to our secured indebtedness to the extent of the value of the collateral securing such secured indebtedness. Borrowings under the Combined Credit Agreement are secured by substantially all of the assets of the Company, and any existing and future subsidiary guarantors, including all of the capital stock of each restricted subsidiary. The Company may, at its option, redeem the 5.625% Notes in whole at any time or in part from time to time, on and after August 15, 2024 at a redemption price of 102.813% of the principal amount thereof if redeemed during the twelve-month period beginning on August 15, 2024, at a redemption price of 101.406% of the principal amount thereof if redeemed during the twelve-month period beginning on August 15, 2025 and at a redemption price of 100% of the principal amount thereof if redeemed on August 15, 2026 and thereafter. Prior to August 15, 2024, the Company may, at its option, redeem some or all of the 5.625% Notes at a price equal to 100% of the principal amount of the 5.625% Notes plus a “make whole” premium and accrued and unpaid interest. The Company may also redeem, at its option, prior to August 15, 2024, up to 40% of the 5.625% Notes with the net proceeds from one or more equity offerings at a redemption price of 105.625% of the principal amount thereof. If the Company experiences certain kinds of changes of control (as defined in the indenture), holders of the 5.625% Notes may require the Company to repurchase any 5.625% Notes held by them at a price equal to 101% of the principal amount of the 5.625% Notes plus accrued and unpaid interest. In addition, if the Company sells assets under certain circumstances, it must offer to repurchase the 5.625% Notes at a price equal to 100% of the principal amount of the 5.625% Notes plus accrued and unpaid interest. The indenture includes covenants that, among other things, restrict the Company’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 the Company; make certain types of investments; create restrictions on the payment of dividends or other amounts from the Company’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 the Company’s assets to, another person. These covenants are subject to a number of important limitations and exceptions. The 5.625% Notes are also subject to customary events of default, including cross-payment default and cross-acceleration provisions. The Company was in compliance with all covenants at September 30, 2022. Interest Rate Swap

Noncontrolling and Redeemable N

Noncontrolling and Redeemable Noncontrolling Interests	9 Months Ended
	Sep. 30, 2022
Noncontrolling Interest [Abstract]
Noncontrolling and Redeemable Noncontrolling Interests	9. Noncontrolling and Redeemable Noncontrolling Interests 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 Retained earnings (but not less than their initial redemption value), except for foreign currency translation adjustments. Changes in the Company’s ownership interests in its less than 100% owned subsidiaries during the three and nine months ended September 30, 2022 and 2021 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Net income (loss) attributable to Stagwell Inc. common shareholders $ 10,609 $ (2,071) $ 33,747 $ 20,199 Transfers from the noncontrolling interest: Change in Stagwell Inc. Paid-in capital for purchase of redeemable noncontrolling interests and noncontrolling interests — 9,679 (1,000) 9,679 Net transfers from noncontrolling interests — 9,679 (1,000) 9,679 Change from net income attributable to Stagwell Inc. and transfers to noncontrolling interests $ 10,609 $ 7,608 $ 32,747 $ 29,878 The following table presents net income attributable to noncontrolling interests between holders of Class C shares and other equity interest holders for the three and nine months ended September 30, 2022 and 2021: Three Months Nine Months 2022 2021 2022 2021 Net income attributable to Class C shareholders $ 19,286 $ 2,110 $ 51,027 $ 2,110 Net income attributable to other equity interest holders 2,287 7,210 4,083 9,833 Net income attributable to noncontrolling interests $ 21,573 $ 9,320 $ 55,110 $ 11,943 The following table presents noncontrolling interests between holders of Class C shares and other equity interest holders as of September 30, 2022 and December 31, 2021: September 30, December 31, 2021 Noncontrolling interest of Class C shareholders $ 502,912 $ 475,373 Noncontrolling interest of other equity interest holders 31,564 32,914 NCI attributable to noncontrolling interests $ 534,476 $ 508,287 Redeemable Noncontrolling Interests The following table presents changes in redeemable noncontrolling interests: September 30, December 31, 2021 Beginning Balance $ 43,364 $ 604 Redemptions (3,511) (15,231) Acquisitions (1) — 53,270 Changes in redemption value 20,546 3,834 Net income (loss) attributable to redeemable noncontrolling interests 4,558 (412) Other 860 1,299 Ending Balance $ 65,817 $ 43,364 (1) As of December 31, 2021, approximately $26,000 represents redeemable noncontrolling interests acquired in connection with the acquisition of MDC. Approximately $27,000 represents redeemable noncontrolling interests acquired in connection with the purchase of the noncontrolling interest of Targeted Victory. See Note 3 of the Notes included herein for additional information related to the purchase of Targeted Victory. 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 2022 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 $65,817 as of September 30, 2022, consists of $62,197, assuming that the subsidiaries perform over the relevant periods at their current profit levels, and $3,620 upon termination of such owner’s employment with the applicable subsidiary or death. 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.

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	9 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	10. 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 6 and 9 of the Notes included herein for information regarding potential payments associated with deferred acquisition consideration and the acquisition of noncontrolling shareholders’ ownership interest in subsidiaries. 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 September 30, 2022, the Company had $24,973 of undrawn letters of credit. The Company entered into one operating lease for which the commencement date has not yet occurred as of September 30, 2022. See Note 7 of the Notes included herein for additional information.

Share Capital

Share Capital	9 Months Ended
	Sep. 30, 2022
Share Capital [Abstract]
Share Capital	11. Share Capital On March 23, 2022, the board of directors authorized a stock repurchase program (the “Repurchase Program”) under which we may repurchase up to $125,000 of shares of our outstanding Class A common stock. The Repurchase Program will expire on March 23, 2025. Under the Repurchase Program, share repurchases may be made at our discretion from time to time in open market transactions at prevailing market prices (including through trading plans that may be adopted in accordance with Rule 10b5-1 of the Exchange Act), in privately negotiated transactions, or through other means. The timing and number of shares repurchased under the Repurchase Program will depend on a variety of factors, including the performance of our stock price, general market and economic conditions, regulatory requirements, the availability of funds, and other considerations we deem relevant. The Repurchase Program may be suspended, modified or discontinued at any time without prior notice. Our board of directors will review the Repurchase Program periodically and may authorize adjustments of its terms. When repurchasing shares, we reduce the value of our Class A Common Stock for the par value of the shares repurchased and account for the difference between the price paid for the Class A Common Stock, excluding fees, and the par value of such stock recorded to Paid-in capital. As of September 30, 2022, there were 4,006 shares of Class A Common Stock repurchased under the Repurchase Program at an aggregate value, excluding fees, of $28,671. These were purchased at an average share price of $7.16 per share. The remaining value of shares of Class A Common Stock permitted to be repurchased under the Repurchase Program was $96,249 as of September 30, 2022. The authorized and outstanding share capital of the Company is below. Class A Common Stock (“Class A Shares”) There are 1,000,000 shares of Class A Shares authorized. There were 131,540 Class A Shares issued and outstanding as of September 30, 2022. The Class A Shares carry one vote each, with a par value of $0.001, entitled to dividends equal to or greater than Class B Shares, and 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. Class B Common Stock (“Class B Shares”) There are 5 shares of Class B Shares authorized. There were 4 of Class B Shares issued and outstanding as of September 30, 2022. The Class B Shares carry twenty votes each, with a par value of $0.001, convertible at any time at the option of the holder into one Class A Share for each Class B Share. Class C Common Stock (“Class C Shares”) There are 250,000 shares of Class C Shares authorized. There were 164,376 Class C Shares issued and outstanding as of September 30, 2022. The Class C Shares do not participate in the earnings of the Company and have a par value of $.00001. In 2021, an aggregate of 179,970 OpCo common units were issued to Stagwell Media in exchange for the equity interests of the Stagwell Subject Entities. Each Class C Share, together with the related OpCo common unit, is convertible at any time, at the option of the holder, into one Class A Share. In the nine months ended September 30, 2022, holders of Class C Shares and OpCo Units (the “Paired Units”) exchanged 15,594 Paired Units for the same number of Class A Shares. Approximately 5,000 Paired Units exchanged into an equal number of Class A Shares triggered an employee tax withholding obligation of $14,900. The Company repurchased approximately 2,000 of the 5,000 Class A Shares issued to the employees to satisfy their employee tax withholding obligation.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	12. 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 Instruments 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 September 30, 2022 and December 31, 2021: September 30, 2022 December 31, 2021 Carrying Fair Value Carrying Fair Value 5.625% Notes 1,100,000 896,500 1,100,000 1,120,900 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 Instruments 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 models of each business’ future performance, including revenue growth and free cash flows. These models are 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 September 30, 2022, the discount rate used to measure these liabilities ranged from 4.2 6.0 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 6 of the Notes included herein for additional information regarding contingent deferred acquisition consideration. At September 30, 2022 and December 31, 2021, the carrying amount of the Company’s financial instruments, including cash, 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 recognized an impairment of goodwill and an impairment of right-of-use lease assets for the three and nine months ended September 30, 2022. The Company did not recognize an impairment of goodwill or right-of-use lease assets in the three and nine months ended September 30, 2021. See Note 7 of the Notes included herein for additional information regarding right-of-use assets and Note 13 of the Notes included herein for additional information regarding goodwill.

Supplemental Information

Supplemental Information	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Information	13. Supplemental Information Subsidiary Awards Certain of the Company’s subsidiaries grant awards to their employees providing them with an equity interest in the respective subsidiary (the “profits interests awards”). The awards generally provide the employee the right, but not the obligation, to sell its profits interest in the subsidiary to the Company based on a performance-based formula and, in certain cases, receive a profit share distribution. The profits interests awards are settled in cash and the corresponding liability at fair value was $32,198 at September 30, 2022 (Level 3 fair value model), and included as a component of Accruals and other liabilities and Other liabilities on the Unaudited Condensed Consolidated Balance Sheets. Stock-based Compensation Total stock-based compensation recognized for the nine months ended September 30, 2022 was $33,410, primarily attributable to $26,288 recognized for stock-based compensation associated with grants of Class A Common Stock and $5,550 recognized for profits interest awards. In the nine months ended September 30, 2022, the Company granted approximately 5,728 share based awards. Impairment and Other Losses The Company recognized an impairment and other losses charge of $28,034 for the nine months ended September 30, 2022, primarily related to the impairment of goodwill totaling $23,139. The goodwill impairment was to write-down the carrying value in excess of the fair value at three reporting units, one in the Integrated Agencies Network, one in the Brand Performance Network and one within the All Other category. The expense was recorded within Impairment and other losses on the Unaudited Condensed Consolidated Statements of Operations.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Tax Disclosure	14. 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. The Company had an income tax expense for the three months ended September 30, 2022 of $11,540 (on a pre-tax income of $46,601 resulting in an effective tax rate of 24.8%) compared to income tax expense of $5,183 (on pre-tax income of $13,182 resulting in an effective tax rate of 39.3%) for the three months ended September 30, 2021. The difference in the effective tax rate of 24.8% in the three months ended September 30, 2022 as compared to 39.3% in the three months ended September 30, 2021 was primarily attributable to higher non-deductible share based compensation in September 30, 2021, and favorable return to provision adjustments at September 30, 2022, offset in part by the impact of non-deductible goodwill impairments in September 30, 2022. The Company had an income tax expense for the nine months ended September 30, 2022 of $20,150 (on a pre-tax income of $112,512 resulting in an effective tax rate of 17.9%) compared to income tax expense of $9,205 (on pre-tax income of $40,466 resulting in an effective tax rate of 22.7%) for the nine months ended September 30, 2021. The difference in the effective tax rate of 17.9% in the nine months ended September 30, 2022 as compared to 22.7% in the nine months ended September 30, 2021 was primarily related to favorable adjustments for share-based compensation vesting and return to provision adjustments at September 30, 2022, offset in part by the impact of non-deductible goodwill impairments in September 30, 2022. In connection with the finalization of the MDC purchase accounting, the Company finalized its tax basis calculations and adjusted deferred taxes and goodwill. The change in goodwill also impacted the deferred tax liability on Company’s ownership interest in OpCo. This change has been accounted for as an equity transaction resulting in a reduction in paid in capital of $17,303. Tax Receivables Agreement In connection with the closing of the Transactions, we entered into the Tax Receivables Agreement (“TRA”) with OpCo and Stagwell Media, pursuant to which we are required to make cash payments to Stagwell Media equal to 85% of certain U.S. federal, state and local income tax or franchise tax savings, if any, that we actually realize, or in certain circumstances are deemed to realize, as a result of (i) increases in the tax basis of OpCo’s assets resulting from exchanges of Paired Units (defined in Note 11) for shares of Class A Common Stock or cash, as applicable, and (ii) certain other tax benefits related to us making payments under the TRA. The Company accounts for amounts payable under the TRA in accordance with ASC 450—Contingencies. We will evaluate the likelihood that we will realize the benefit represented by the deferred tax asset and, to the extent that we estimate that it is more likely than not that we will not realize the benefit, we will reduce the carrying amount of the deferred tax asset with a valuation allowance and a corresponding reduction to the TRA liability. The amounts to be recorded for both the deferred tax assets and the liability under the TRA will be estimated at the time of any purchase or exchange as a reduction to shareholders’ equity, and the effects of changes in any of our estimates after this date will be included in net income or loss. Similarly, the effect of subsequent changes in the enacted tax rates will be included in net income or loss. In the first quarter of 2022, the Company had its first exchange of Paired Units for shares of Class A Common Stock and recorded its initial TRA liability. Further exchanges have been made in the subsequent quarters. As of September 30, 2022, the Company had a TRA liability of $17,649 and has recognized deferred tax benefits of $20,763 as a reduction to the net deferred tax liability on its unaudited condensed consolidated balance sheets in connection with the exchanges of the Paired Units and the projected obligations under the TRA.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2022
Related Party Transactions [Abstract]
Related Party Transactions	15. Related Party Transactions In the ordinary course of business, the Company enters into transactions with related parties, including its affiliates. The transactions may range in the nature and value of services underlying the arrangements. The following table presents significant related party transactions where a third party receives services from the Company: Total Transaction Value Revenues Due From Three Months Nine Months September 30, December 31, 2021 Services 2022 2021 2022 2021 Technological (1) Ongoing arrangement (7) $ 10 $ 15 $ 29 $ 45 $ 36 $ 137 Marketing Services (2) Ongoing arrangement (7) 905 63 1,388 155 1,178 88 Polling Services (3) $1,271 201 224 779 343 140 70 Marketing and Website Development Services (4) $5,689 589 441 3,512 441 333 502 Marketing and Advertising Services (5) Ongoing arrangement (7) 866 203 2,038 272 1,800 4,577 Marketing and Advertising Services (8) Ongoing arrangement (7) 2,064 — 3,315 — 2,041 — Polling Services (6) $3,800 1,295 — 2,248 — — — (1) Client was founded by the Company’s Chief Executive Officer. (2) Family member of one of the Brands’ partners holds an executive leadership position in the client. (3) Family members of certain of the Company’s executives hold key leadership positions in the client. (4) Client has significant interest in the Company. (5) Brands’ partners and executives either hold a key leadership position in or are on the board of directors of the client. (6) Founder of the client has significant interest in the Company. (7) This arrangement was entered into for an indefinite term and is invoiced as services are provided. (8) A member of the Company’s board of directors holds an executive leadership position in the client. The following table presents significant related party transactions in which the Company receives services from a third party: Total Transaction Value Expenses Due to Related Party Three Months Nine Months September 30, December 31, 2021 Services 2022 2021 2022 2021 Data Management Services (1) Ongoing arrangement (4) $ 890 $ 422 $ 1,705 $ 1,178 $ 1,249 $ 623 Sales and Management Services (2) Ongoing arrangement (4) 703 88 1,442 266 1,685 442 Marketing Services (3) $40 — — 40 — 40 — (1) Family member of one of the Brand’s partners holds an executive leadership position in the third party. (2) Chief Executive Officer of the Brand is a shareholder of the affiliate providing the services. (3 ) A family member of the Company’s President holds a key leadership position in the client. (4) This arrangement was entered into for an indefinite term and is invoiced as services are provided. In 2019, a Brand of the Company, entered into a loan agreement with a third party who holds a minority interest in the Brand. The loan receivable of $4,029 and $3,784 due from the third party is included within Other current assets in the Company’s Unaudited Condensed Consolidated Balance Sheets as of September 30, 2022 and December 31, 2021, respectively. The Company recognized $80 and $234 for the three and nine months ended September 30, 2022, respectively, and $76 and $227 for the three and nine months ended September 30, 2021, respectively, of interest income within interest expense, net on its Unaudited Condensed Consolidated Statements of Operations.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Segment Information	16. 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 excluding non-operating income or expense to achieve operating income, plus depreciation and amortization, stock-based compensation, deferred acquisition consideration adjustments, and other items. Other items include restructuring costs, acquisition-related expenses, and non-recurring items. Due to changes in the Company’s internal management and reporting structure in the second quarter of 2022, reportable segment results for periods presented prior to the second quarter of 2022 have been recast to reflect the reclassification of certain reporting units (brands) between operating segments. The changes in reportable segments were that the Forsman & Bodenfors, Observatory, Crispin Porter Bogusky, Bruce Mau and Vitro brands, previously within the Integrated Agencies Network, are now within the Brand Performance Network. The Company has three reportable segments as follows: “Integrated Agencies Network,” “Brand Performance Network” and the “Communications 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. • The Integrated Agencies Network includes five operating segments: the Anomaly Alliance, Constellation, the Doner Partner Network, Code and Theory, and National Research Group. The operating segments offer an array of complementary services spanning our core capabilities of Digital Transformation, Performance Media & Data, Consumer Insights & Strategy, and Creativity & Communications. The brands included in the operating segments that comprise the Integrated Agencies Network reportable segment are as follows: Anomaly Alliance (Anomaly, Concentric, Hunter, Mono, YML and Scout (brands), Constellation (72andSunny, Colle McVoy, Instrument, Redscout, Hello Design, Team Enterprises, and Harris Insights), the Doner Partner Network (Doner, KWT Global, Harris X, Veritas, Doner North, Northstar, which is currently sunsetting, and Yamamoto (brands)), Code and Theory and National Research Group. 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 may occasionally compete with each other for new business or have business move between them. • The Brand Performance Network (“BPN”), previously referred to as the “Media Network” reportable segment, is comprised of a single operating segment. BPN includes a unified media and data management structure with omnichannel media placement, creative media consulting, influencer and business-to-business marketing capabilities. Our Brands in this segment aim to provide scaled creative performance through developing and executing sophisticated omnichannel campaign strategies leveraging significant amounts of consumer data. BPN’s Brands combine media buying and planning across a range of digital and traditional platforms (out-of-home, paid search, social media, lead generation, programmatic, television, broadcast, among others) and includes multichannel brands Assembly, Brand New Galaxy, Crispin Porter Bogusky, Forsman & Bodenfors, Bruce Mau Design, Goodstuff, MMI Agency, digital creative & transformation consultancy Gale, B2B specialist Multiview, Observatory, Vitro, CX specialists Kenna, and travel media experts Ink. • The Communications Network reportable segment is comprised of a single operating segment, our specialist network that provides advocacy, strategic corporate communications, investor relations, public relations, online fundraising and other services to both corporations and political and advocacy organizations and consists of our Allison & Partners SKDK (including Sloane & Company), and Targeted Victory brands. • All Other consists of the Company’s digital innovation group and Stagwell Marketing Cloud products such as PRophet and Reputation Defender (which was sold in September 2021). • 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 Nine Months 2022 2021 2022 2021 Revenue: (Dollars in Thousands) Integrated Agencies Network $ 367,122 $ 269,071 $ 1,095,761 $ 419,659 Brand Performance Network 171,463 122,826 563,546 257,109 Communications Network 121,770 67,348 311,075 157,794 All Other 3,436 7,389 9,225 22,874 Total Revenue $ 663,791 $ 466,634 $ 1,979,607 $ 857,436 Adjusted EBITDA: Integrated Agencies Network $ 76,224 $ 66,063 $ 215,920 $ 100,264 Brand Performance Network 24,312 17,664 89,259 30,485 Communications Network 25,462 10,312 58,630 28,302 All Other (363) 419 (972) (1,316) Corporate (10,543) (6,940) (35,014) (7,656) Total Adjusted EBITDA $ 115,092 $ 87,518 $ 327,823 $ 150,079 Depreciation and amortization $ (32,207) $ (24,790) $ (95,642) $ (46,122) Impairment and other losses (25,211) (14,926) (28,034) (14,926) Stock-based compensation (12,258) (53,465) (33,410) (53,465) Deferred acquisition consideration 29,789 (3,422) 14,420 (9,456) Other items, net (5,152) (10,549) (12,112) (15,298) Total Operating Income (Loss) $ 70,053 $ (19,634) $ 173,045 $ 10,812 Three Months Nine Months 2022 2021 2022 2021 (Dollars in Thousands) Other Income (expenses): Interest expense, net $ (19,672) $ (11,912) $ (56,552) $ (15,197) Foreign exchange, net (3,927) (893) (4,163) (1,955) Other, net 147 45,621 182 46,806 Income before income taxes and equity in earnings of non-consolidated affiliates 46,601 13,182 112,512 40,466 Income tax expense 11,540 5,183 20,150 9,205 Income before equity in earnings of non-consolidated affiliates 35,061 7,999 92,362 31,261 Equity in income (loss) of non-consolidated affiliates 213 (76) 1,053 (75) Net income 35,274 7,923 93,415 31,186 Net income attributable to noncontrolling and redeemable noncontrolling interests (24,665) (9,994) (59,668) (10,987) Net income (loss) attributable to Stagwell Inc. common shareholders $ 10,609 $ (2,071) $ 33,747 $ 20,199 Depreciation and amortization: Integrated Agencies Network $ 18,316 $ 13,494 $ 55,206 $ 18,787 Brand Performance Network 8,205 7,499 25,044 18,070 Communications Network 2,654 2,110 7,718 5,087 All Other 1,206 493 2,457 2,013 Corporate 1,826 1,194 5,217 2,165 Total $ 32,207 $ 24,790 $ 95,642 $ 46,122 Stock-based compensation Integrated Agencies Network $ 5,308 $ 32,431 $ 15,044 $ 32,431 Brand Performance Network 2,923 2,620 9,152 2,620 Communications Network 671 15,384 1,077 15,384 All Other 7 16 15 16 Corporate 3,349 3,014 8,122 3,014 Total $ 12,258 $ 53,465 $ 33,410 $ 53,465 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 4 of the Notes included herein for a summary of the Company’s revenue by geographic region for the three and nine months ended September 30, 2022 and 2021.

Accounting Policies (Policies)

Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
New Accounting Pronouncements	2. New Accounting PronouncementsIn March 2020, the Financial Accounting Standards Board, (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, and in January 2021 subsequently issued ASU 2021-01, Facilitation of the Effects of Reference Rate Reform on Financial Reporting, to provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 is effective upon issuance, through December 31, 2022. The Combined Credit Agreement (as defined in Note 8 of the Notes included herein) is the Company’s only contractual arrangement that referenced LIBOR and is impacted by ASU 2020-04. On April 28, 2022, the Company amended the Combined Credit Agreement. Among other things, this amendment replaced any references to LIBOR with references to the Secured Overnight Financing Rate (“SOFR”). Based on the Company’s assessment, the Company has elected to apply the optional expedient and treat the contract modifications as a continuation of an existing contract. This election does not have a material effect on our results of operations or financial position. See Note 8 of the Notes included herein for information.

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	9 Months Ended
	Sep. 30, 2022
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The preliminary purchase price allocation is as follows: Amount Cash and cash equivalents $ 2,771 Accounts receivable 7,638 Other current assets 1,634 Fixed assets 2,338 Intangible assets 12,410 Other assets 1,416 Accounts payable (6,855) Accruals and other liabilities (4,896) Advance billings (1,095) Other liabilities (3,448) Net assets assumed 11,913 Goodwill 25,552 Purchase price consideration $ 37,465 Amount Accounts receivable $ 582 Other current assets 669 Intangible assets 13,200 Accounts payable (379) Other liabilities (270) Noncontrolling interests (2,667) Net assets assumed 11,135 Goodwill 6,569 Purchase price consideration $ 17,704 The purchase price allocation is as follows: Amount Cash and cash equivalents $ 130,197 Accounts receivable 398,736 Other current assets 41,291 Fixed assets 81,343 Right-of-use lease assets - operating leases 252,739 Intangible assets 810,900 Other assets 18,282 Accounts payable (139,590) Accruals and other liabilities (307,439) Advance billings (211,212) Current portion of lease liabilities (54,009) Current portion of deferred acquisition consideration (53,054) Long-term debt (901,736) Revolving credit facility (109,954) Long-term portion of deferred acquisition consideration (8,056) Long-term portion of lease liabilities (283,637) Other liabilities (139,026) Redeemable noncontrolling interests (25,990) Preferred shares (209,980) Noncontrolling interests (151,090) Net liabilities assumed (861,285) Goodwill 1,290,347 Purchase price consideration $ 429,062 Amount Cash and cash equivalents $ 30,985 Accounts receivable 28,685 Other current assets 3,207 Fixed assets 237 Right-of-use lease assets - operating leases 2,060 Intangible assets 14,974 Other assets 55 Accounts payable (6,344) Accruals and other liabilities (27,353) Advance billings (15,956) Current portion of lease liabilities (857) Income taxes payable (967) Long-term portion of lease liabilities (3,744) Other liabilities (1,204) Net assets assumed 23,778 Goodwill 4,410 Purchase price consideration $ 28,188
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination	The following table presents the details of identifiable intangible assets acquired: Estimated Fair Value Estimated Useful Life in Years Trade Names $ 5,930 10 Customer Relationships 5,390 11 Other 1,090 7 Total Acquired Intangible Assets $ 12,410 Estimated Fair Value Estimated Useful Life in Years Customer Relationships $ 11,400 10 Trade names 1,800 10 Total Acquired Intangible Assets $ 13,200 Estimated Fair Value Estimated Useful Life in Years Trade Names $ 98,000 10 Customer Relationships 712,900 6-15 Total Acquired Intangible Assets $ 810,900 Estimated Fair Value Estimated Useful Life in Years Trade Names $ 1,349 15 Customer Relationships 13,625 10 Total Acquired Intangible Assets $ 14,974
Business Acquisition, Pro Forma Information	The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, Nine Months Ended September 30, 2021 2022 2021 Revenue $ 473,539 $ 1,989,833 $ 878,610 Net Income 7,031 92,670 30,495 Three Months Ended September 30, Nine Months Ended September 30, 2021 2022 2021 Revenue $ 468,862 $ 1,983,437 $ 867,533 Net Income 8,462 94,768 34,491 The unaudited pro forma information for the periods set forth below gives effect to the acquisition as if it occurred as of January 1, 2021. The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that actually would have been achieved had the acquisitions been consummated as of that time. Three Months Ended September 30, 2021 Nine Months Ended September 30, 2021 Revenue $ 568,424 $ 1,612,399 The pro forma net loss was nominal for the three and nine months ended September 30, 2021. Revenue attributable to MDC, included within the three and nine months ended September 30, 2021 unaudited condensed consolidated statement of operations is $342,539 and $995,729, respectively and operating income was $17,506 and $77,817, respectively. Three Months Ended September 30, 2021 Nine Months Ended September 30, 2021 Revenue $ 471,406 $ 872,192 Net Income 8,357 33,894

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2022
By Location
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue	The following table presents revenue disaggregated by geography for the three and nine months ended September 30, 2022 and 2021: Three Months Ended September 30, Nine Months Ended September 30, Geographical Location Reportable Segment 2022 2021 2022 2021 United States All $ 553,744 $ 387,662 $ 1,650,610 $ 733,038 United Kingdom All 42,774 32,218 125,950 62,416 Other All 67,273 46,754 203,047 61,982 $ 663,791 $ 466,634 $ 1,979,607 $ 857,436
Principal Capability
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue	The following table presents revenue disaggregated by our principal capabilities for the three and nine months ended September 30, 2022 and 2021: Three Months Ended September 30, Nine Months Ended September 30, Principal Capabilities Reportable Segment 2022 2021 2022 2021 Digital Transformation All Segments $ 197,337 $ 124,268 $ 606,061 $ 256,966 Creativity and Communications Integrated Agencies Network, Brand Performance Network, Communications Network 304,048 208,424 890,692 261,080 Performance Media and Data Brand Performance Network 111,548 88,139 325,584 222,186 Consumer Insights and Strategy Integrated Agencies Network 50,858 45,803 157,270 117,204 $ 663,791 $ 466,634 $ 1,979,607 $ 857,436

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Schedule of Calculation of Numerator and Denominator in Earnings Per Share	The following table sets forth the computations of basic and diluted income per common share for the three and nine months ended September 2022: Three Months Ended September 30, Nine Months Ended September 30, 2022 2022 Earnings Per Share - Basic Numerator: Net income $ 35,274 $ 93,415 Net income attributable to Class C shareholders (19,286) (51,027) Net loss attributable to other equity interest holders (5,379) (8,641) Net income attributable to noncontrolling and redeemable noncontrolling interests (24,665) (59,668) Net income attributable to Stagwell Inc. common shareholders $ 10,609 $ 33,747 Denominator: Weighted Average number of common shares outstanding 125,384 124,710 Earnings Per Share - Basic $ 0.08 $ 0.27 Earnings Per Share - Diluted Numerator: Net income attributable to Stagwell Inc. common shareholders $ 10,609 $ 33,747 Denominator: Basic - Weighted Average number of common shares outstanding 125,384 124,710 Dilutive shares: Stock appreciation rights 1,837 1,885 Restricted share and restricted unit awards 3,277 4,955 Diluted - Weighted average number of common shares outstanding 130,498 131,550 Earnings Per Share - Diluted $ 0.08 $ 0.26 The following table sets forth the computations of basic and diluted income per common share for the three and nine months ended September 2021: Three Months Ended September 30, Nine Months Ended September 30, 2021 2021 Numerator: Net loss attributable to Stagwell Inc. common shareholders $ (4,545) $ (4,545) Denominator: Weighted average number of common shares outstanding 76,106 76,106 Loss Per Share - Basic & Diluted $ (0.06) $ (0.06) Anti-dilutive: Class C shares 179,970 179,970 Stock Appreciation Rights and Restricted Awards 6,596 6,596

Deferred Acquisition Consider_2

Deferred Acquisition Consideration (Tables)	9 Months Ended
	Sep. 30, 2022
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 September 30, 2022 and December 31, 2021: September 30, December 31, 2021 Beginning balance of contingent payments $ 222,369 $ 17,847 Payments (71,865) (12,431) Adjustment to deferred acquisition consideration (1) (13,793) 18,721 Additions (2) 24,594 198,937 Currency Translation Adjustment (1,576) — Other (140) (705) Ending balance of contingent payments (3) $ 159,589 $ 222,369 (1) Adjustment to deferred acquisition consideration contains fair value changes from the Company’s initial estimates of deferred acquisition payments. Adjustment to deferred acquisition consideration is recorded within Office and general expenses on the Unaudited Condensed Consolidated Statements of Operations. (2) In 2021, approximately $61,000 of additions represent deferred acquisition consideration acquired in connection with the acquisition of MDC. Approximately $136,000 of additions represent deferred acquisition consideration acquired in connection with the purchases of noncontrolling interests. See Note 3 of the Notes included herein for additional information related to the purchases of Concentric, Targeted Victory, and Instrument. In 2022, approximately 22,014 of additions represent deferred acquisition consideration acquired in connection with the acquisitions of BNG, Apollo, and PEP Group. See Note 3 of the Notes included herein for additional information related to these purchases. (3) As of September 30, 2022, approximately, $42,356 of the deferred acquisition consideration is expected to be settled in the Company’s in Class A Common Stock.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Lease Costs and Other Quantitative Information	The following table presents lease costs and other quantitative information for the three and nine months ended September 30, 2022 and 2021: Three Months Nine Months 2022 2021 2022 2021 Lease Cost: Operating lease cost $ 19,966 $ 13,502 $ 54,929 $ 27,779 Variable lease cost 4,759 3,230 13,963 5,167 Sublease rental income (3,636) (2,359) (11,128) (4,290) Total lease cost $ 21,089 $ 14,373 $ 57,764 $ 28,656 Additional information: Cash paid for amounts included in the measurement of lease liabilities for operating leases Operating cash flows $ 22,694 $ 16,490 $ 69,827 $ 29,854 Right-of-use lease assets obtained in exchange for operating lease liabilities and other non-cash adjustments $ 5,189 $ 353,984 $ 27,878 $ 353,984
Minimum Future Rental Payments	The following table presents minimum future rental payments under the Company’s leases at September 30, 2022 and their reconciliation to the corresponding lease liabilities: Maturity Analysis Remaining 2022 $ 20,551 2023 88,697 2024 75,684 2025 59,203 2026 44,170 2027 and thereafter 158,858 Total 447,163 Less: Present value discount (65,342) Lease liability $ 381,821

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Schedule of Debt	As of September 30, 2022 and December 31, 2021, the Company’s indebtedness was comprised as follows: September 30, December 31, 2021 Revolving credit facility $ 245,000 $ 110,165 5.625% Notes 1,100,000 1,100,000 Debt issuance costs (15,866) (18,564) Total long-term debt $ 1,329,134 $ 1,191,601

Noncontrolling and Redeemable_2

Noncontrolling and Redeemable Noncontrolling Interests (Tables)	9 Months Ended
	Sep. 30, 2022
Noncontrolling Interest [Abstract]
Noncontrolling Interest [Table Text Block]	Changes in the Company’s ownership interests in its less than 100% owned subsidiaries during the three and nine months ended September 30, 2022 and 2021 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Net income (loss) attributable to Stagwell Inc. common shareholders $ 10,609 $ (2,071) $ 33,747 $ 20,199 Transfers from the noncontrolling interest: Change in Stagwell Inc. Paid-in capital for purchase of redeemable noncontrolling interests and noncontrolling interests — 9,679 (1,000) 9,679 Net transfers from noncontrolling interests — 9,679 (1,000) 9,679 Change from net income attributable to Stagwell Inc. and transfers to noncontrolling interests $ 10,609 $ 7,608 $ 32,747 $ 29,878 The following table presents net income attributable to noncontrolling interests between holders of Class C shares and other equity interest holders for the three and nine months ended September 30, 2022 and 2021: Three Months Nine Months 2022 2021 2022 2021 Net income attributable to Class C shareholders $ 19,286 $ 2,110 $ 51,027 $ 2,110 Net income attributable to other equity interest holders 2,287 7,210 4,083 9,833 Net income attributable to noncontrolling interests $ 21,573 $ 9,320 $ 55,110 $ 11,943 The following table presents noncontrolling interests between holders of Class C shares and other equity interest holders as of September 30, 2022 and December 31, 2021: September 30, December 31, 2021 Noncontrolling interest of Class C shareholders $ 502,912 $ 475,373 Noncontrolling interest of other equity interest holders 31,564 32,914 NCI attributable to noncontrolling interests $ 534,476 $ 508,287
Redeemable Noncontrolling Interest [Table Text Block]	The following table presents changes in redeemable noncontrolling interests: September 30, December 31, 2021 Beginning Balance $ 43,364 $ 604 Redemptions (3,511) (15,231) Acquisitions (1) — 53,270 Changes in redemption value 20,546 3,834 Net income (loss) attributable to redeemable noncontrolling interests 4,558 (412) Other 860 1,299 Ending Balance $ 65,817 $ 43,364 (1) As of December 31, 2021, approximately $26,000 represents redeemable noncontrolling interests acquired in connection with the acquisition of MDC. Approximately $27,000 represents redeemable noncontrolling interests acquired in connection with the purchase of the noncontrolling interest of Targeted Victory. See Note 3 of the Notes included herein for additional information related to the purchase of Targeted Victory.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2022
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 September 30, 2022 and December 31, 2021: September 30, 2022 December 31, 2021 Carrying Fair Value Carrying Fair Value 5.625% Notes 1,100,000 896,500 1,100,000 1,120,900

Related Party Disclosures (Tabl

Related Party Disclosures (Tables)	9 Months Ended
	Sep. 30, 2022
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	The following table presents significant related party transactions where a third party receives services from the Company: Total Transaction Value Revenues Due From Three Months Nine Months September 30, December 31, 2021 Services 2022 2021 2022 2021 Technological (1) Ongoing arrangement (7) $ 10 $ 15 $ 29 $ 45 $ 36 $ 137 Marketing Services (2) Ongoing arrangement (7) 905 63 1,388 155 1,178 88 Polling Services (3) $1,271 201 224 779 343 140 70 Marketing and Website Development Services (4) $5,689 589 441 3,512 441 333 502 Marketing and Advertising Services (5) Ongoing arrangement (7) 866 203 2,038 272 1,800 4,577 Marketing and Advertising Services (8) Ongoing arrangement (7) 2,064 — 3,315 — 2,041 — Polling Services (6) $3,800 1,295 — 2,248 — — — (1) Client was founded by the Company’s Chief Executive Officer. (2) Family member of one of the Brands’ partners holds an executive leadership position in the client. (3) Family members of certain of the Company’s executives hold key leadership positions in the client. (4) Client has significant interest in the Company. (5) Brands’ partners and executives either hold a key leadership position in or are on the board of directors of the client. (6) Founder of the client has significant interest in the Company. (7) This arrangement was entered into for an indefinite term and is invoiced as services are provided. (8) A member of the Company’s board of directors holds an executive leadership position in the client. The following table presents significant related party transactions in which the Company receives services from a third party: Total Transaction Value Expenses Due to Related Party Three Months Nine Months September 30, December 31, 2021 Services 2022 2021 2022 2021 Data Management Services (1) Ongoing arrangement (4) $ 890 $ 422 $ 1,705 $ 1,178 $ 1,249 $ 623 Sales and Management Services (2) Ongoing arrangement (4) 703 88 1,442 266 1,685 442 Marketing Services (3) $40 — — 40 — 40 — (1) Family member of one of the Brand’s partners holds an executive leadership position in the third party. (2) Chief Executive Officer of the Brand is a shareholder of the affiliate providing the services. (3 ) A family member of the Company’s President holds a key leadership position in the client. (4) This arrangement was entered into for an indefinite term and is invoiced as services are provided.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Three Months Nine Months 2022 2021 2022 2021 Revenue: (Dollars in Thousands) Integrated Agencies Network $ 367,122 $ 269,071 $ 1,095,761 $ 419,659 Brand Performance Network 171,463 122,826 563,546 257,109 Communications Network 121,770 67,348 311,075 157,794 All Other 3,436 7,389 9,225 22,874 Total Revenue $ 663,791 $ 466,634 $ 1,979,607 $ 857,436 Adjusted EBITDA: Integrated Agencies Network $ 76,224 $ 66,063 $ 215,920 $ 100,264 Brand Performance Network 24,312 17,664 89,259 30,485 Communications Network 25,462 10,312 58,630 28,302 All Other (363) 419 (972) (1,316) Corporate (10,543) (6,940) (35,014) (7,656) Total Adjusted EBITDA $ 115,092 $ 87,518 $ 327,823 $ 150,079 Depreciation and amortization $ (32,207) $ (24,790) $ (95,642) $ (46,122) Impairment and other losses (25,211) (14,926) (28,034) (14,926) Stock-based compensation (12,258) (53,465) (33,410) (53,465) Deferred acquisition consideration 29,789 (3,422) 14,420 (9,456) Other items, net (5,152) (10,549) (12,112) (15,298) Total Operating Income (Loss) $ 70,053 $ (19,634) $ 173,045 $ 10,812 Three Months Nine Months 2022 2021 2022 2021 (Dollars in Thousands) Other Income (expenses): Interest expense, net $ (19,672) $ (11,912) $ (56,552) $ (15,197) Foreign exchange, net (3,927) (893) (4,163) (1,955) Other, net 147 45,621 182 46,806 Income before income taxes and equity in earnings of non-consolidated affiliates 46,601 13,182 112,512 40,466 Income tax expense 11,540 5,183 20,150 9,205 Income before equity in earnings of non-consolidated affiliates 35,061 7,999 92,362 31,261 Equity in income (loss) of non-consolidated affiliates 213 (76) 1,053 (75) Net income 35,274 7,923 93,415 31,186 Net income attributable to noncontrolling and redeemable noncontrolling interests (24,665) (9,994) (59,668) (10,987) Net income (loss) attributable to Stagwell Inc. common shareholders $ 10,609 $ (2,071) $ 33,747 $ 20,199 Depreciation and amortization: Integrated Agencies Network $ 18,316 $ 13,494 $ 55,206 $ 18,787 Brand Performance Network 8,205 7,499 25,044 18,070 Communications Network 2,654 2,110 7,718 5,087 All Other 1,206 493 2,457 2,013 Corporate 1,826 1,194 5,217 2,165 Total $ 32,207 $ 24,790 $ 95,642 $ 46,122 Stock-based compensation Integrated Agencies Network $ 5,308 $ 32,431 $ 15,044 $ 32,431 Brand Performance Network 2,923 2,620 9,152 2,620 Communications Network 671 15,384 1,077 15,384 All Other 7 16 15 16 Corporate 3,349 3,014 8,122 3,014 Total $ 12,258 $ 53,465 $ 33,410 $ 53,465

Basis of Presentation and Rec_2

Basis of Presentation and Recent Developments (Details) £ in Thousands, $ in Thousands	Oct. 03, 2022 USD ($)	Oct. 03, 2022 GBP (£)	Jul. 15, 2022 USD ($)	Jul. 12, 2022 USD ($)	Apr. 19, 2022 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Reclassification [Line Items]
Accrued media						$ 188,344	$ 237,794
BNG
Business Acquisition [Line Items]
Aggregate purchase price					$ 20,695
Estimated contingent consideration					$ 50,000
Contingent consideration payable in cash (percent)					67%
Contingent consideration payable in equity (percent)					33%
PEP Group
Business Acquisition [Line Items]
Aggregate purchase price				$ 521
Estimated contingent consideration				$ 2,679
Apollo
Business Acquisition [Line Items]
Aggregate purchase price			$ 2,300
Payments to Acquire Business, First Payment			1
Payments to Acquire Business, Second Payment			$ 1,500
Subsequent event | Maru Group
Business Acquisition [Line Items]
Aggregate purchase price | £		£ 23,000
Subsequent event | Wolfgang
Business Acquisition [Line Items]
Aggregate purchase price	$ 3,750
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	5,250
Subsequent event | Epicenter
Business Acquisition [Line Items]
Aggregate purchase price	9,729
Estimated contingent consideration	$ 5,000
Restatement Adjustment
Reclassification [Line Items]
Accrued media							$ 237,794

Acquisitions and Dispositions -

Acquisitions and Dispositions - Narrative (Details) $ / shares in Units, £ in Thousands, shares in Thousands

Oct. 03, 2022 USD ($)

Jul. 15, 2022 USD ($)

Jul. 12, 2022 USD ($)

May 31, 2022 USD ($)

Apr. 19, 2022 USD ($)

Apr. 01, 2022 USD ($)

Dec. 31, 2021 USD ($)

Dec. 31, 2021 GBP (£)

Dec. 01, 2021 USD ($)

Oct. 01, 2021 USD ($)

Aug. 02, 2021 USD ($) $ / shares shares

Jul. 31, 2023

Sep. 30, 2022 USD ($)

Dec. 31, 2021 GBP (£)

Business Acquisition [Line Items]

Goodwill

$ 1,652,723,000

$ 1,615,694,000

Payments for Acquire Businesses, Working Capital Payments | £

£ 9

Stagwell Media

Business Acquisition [Line Items]

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash

$ 1.80

MDC

Business Acquisition [Line Items]

Business Combination, Consideration Transferred, Equity Interests Issued and Issuable

$ 80,000,000

Acquired Finite-lived Intangible Assets, Weighted Average Useful Life

13 years

Goodwill

$ 1,290,347,000

Business Acquisition, Share Price | $ / shares

$ 5.42

MDC | Previously Reported Goodwill

Business Acquisition [Line Items]

Goodwill

$ 1,298,370,000

MDC | Common Class C | Stagwell Media

Business Acquisition [Line Items]

Stock Issued During Period, Shares, Acquisitions | shares

179,970

MDC | Common Units | Stagwell OpCo

Business Acquisition [Line Items]

Remaining ownership interest acquired (percent)

69.55%

MDC | Integrated Agencies Network

Business Acquisition [Line Items]

Goodwill

$ 932,582,000

MDC | Media Network

Business Acquisition [Line Items]

Goodwill

285,396,000

MDC | Communications Network

Business Acquisition [Line Items]

Goodwill

72,369,000

Goodstuff Holdings Limited

Business Acquisition [Line Items]

Closing cash payment | £

21

Goodwill

$ 4,410,000

Payment for contingent consideration | £

8

Payments to Acquire Businesses, Deferred Payments | £

4

Payment for contingent consideration | £

8

Payments to Acquire Businesses, Deferred Payments | £

£ 4

Goodstuff Holdings Limited | Maximum

Business Acquisition [Line Items]

Deferred acquisition consideration | £

£ 22

Targeted Victory

Business Acquisition [Line Items]

Remaining ownership interest acquired (percent)

27%

Aggregate purchase price

$ 73,898,000

Deferred acquisition consideration

$ 46,618,000

Business Acquisition, Percentage of Voting Interests Acquired, Step One

13.30%

Business Combination, Consideration Transferred, Redeemable Noncontrolling Interest

$ 27,280,000

Business Acquisition, Percentage of Voting Interests Acquired, Step One

13.30%

Business Combination, Consideration Transferred, Redeemable Noncontrolling Interest

$ 27,280,000

Targeted Victory | Forecast

Business Acquisition [Line Items]

Business Acquisitions, Percentage of Voting Interests Acquired, Step Two

13.30%

Business Acquisitions, Percentage of Voting Interests Acquired, Step Two

13.30%

Targeted Victory | Common Class A

Business Acquisition [Line Items]

Business Combination, Contingent Consideration Arrangements, Purchase Price Option Sacrificed in Shares, Percentage

50%

Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High

$ 135,000

Business Combination, Contingent Consideration Arrangements, Purchase Price Option Sacrificed in Shares, Percentage

50%

Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High

$ 135,000

Concentric

Business Acquisition [Line Items]

Remaining ownership interest acquired (percent)

27%

Aggregate purchase price

$ 8,058,000

Closing cash payment

1,581,000

Deferred acquisition consideration

$ 6,477,000

Instrument Holdings Inc.

Business Acquisition [Line Items]

Remaining ownership interest acquired (percent)

49%

49%

Aggregate purchase price

$ 157,072,000

Closing cash payment

37,500,000

Business Combination, Consideration Transferred, Deferred Acquisition Payment

82,072,000

Business Combination, Consideration Transferred, Deferred Acquisition Payment

82,072,000

Instrument Holdings Inc. | Common Class A

Business Acquisition [Line Items]

Business Combination, Consideration Transferred, Equity Interests Issued and Issuable

$ 37,500,000

Hello Design

Business Acquisition [Line Items]

Aggregate purchase price

$ 4,600,000

Closing cash payment

3,600,000

Deferred acquisition consideration

$ 1,000,000

BNG

Business Acquisition [Line Items]

Aggregate purchase price

$ 20,695,000

Goodwill

$ 25,552,000

Estimated contingent consideration

$ 50,000,000

Contingent consideration payable in cash (percent)

67%

Contingent consideration payable in equity (percent)

33%

TMA Direct

Business Acquisition [Line Items]

Remaining ownership interest acquired (percent)

87%

Aggregate purchase price

$ 17,247,000

Deferred acquisition consideration

457,000

Goodwill

$ 6,569,000

Business Acquisition, Percentage of Voting Interests Acquired, Step One

13%

Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High

$ 13,330,000

Business Acquisition, Percentage of Voting Interests Acquired, Step One

13%

Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High

$ 13,330,000

Epicenter | Subsequent event

Business Acquisition [Line Items]

Aggregate purchase price

$ 9,729,000

Estimated contingent consideration

$ 5,000,000

PEP Group

Business Acquisition [Line Items]

Aggregate purchase price

$ 521,000

Estimated contingent consideration

$ 2,679,000

Apollo

Business Acquisition [Line Items]

Aggregate purchase price

$ 2,300,000

Payments to Acquire Business, First Payment

1,000

Payments to Acquire Business, Second Payment

$ 1,500,000

Acquisitions and Dispositions_2

Acquisitions and Dispositions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2022	May 31, 2022	Apr. 19, 2022	Dec. 31, 2021	Aug. 02, 2021
Business Acquisition [Line Items]
Goodwill	$ 1,615,694			$ 1,652,723
Goodstuff Holdings Limited
Business Acquisition [Line Items]
Cash and cash equivalents				30,985
Accounts receivable				28,685
Other current assets				3,207
Fixed assets				237
Right-of-use lease assets - operating leases				2,060
Intangible assets				14,974
Other assets				55
Accounts payable				(6,344)
Accruals and other liabilities				(27,353)
Advance billings				(15,956)
Current portion of lease liabilities				(857)
Income taxes payable				(967)
Long-term portion of lease liabilities				(3,744)
Other liabilities				(1,204)
Net liabilities assumed				23,778
Goodwill				4,410
Purchase price consideration				$ 28,188
MDC
Business Acquisition [Line Items]
Cash and cash equivalents					$ 130,197
Accounts receivable					398,736
Other current assets					41,291
Fixed assets					81,343
Right-of-use lease assets - operating leases					252,739
Intangible assets					810,900
Other assets					18,282
Accounts payable					(139,590)
Accruals and other liabilities					(307,439)
Advance billings					(211,212)
Current portion of lease liabilities					(54,009)
Current portion of deferred acquisition consideration					(53,054)
Long-term debt					(901,736)
Revolving credit facility					(109,954)
Long-term portion of deferred acquisition consideration					(8,056)
Long-term portion of lease liabilities					(283,637)
Other liabilities					(139,026)
Redeemable noncontrolling interests					(25,990)
Preferred shares					(209,980)
Noncontrolling interests					(151,090)
Net liabilities assumed					(861,285)
Goodwill					1,290,347
Purchase price consideration					429,062
BNG
Business Acquisition [Line Items]
Cash and cash equivalents			$ 2,771
Accounts receivable					7,638
Other current assets					1,634
Fixed assets					2,338
Intangible assets					12,410
Other assets					1,416
Accounts payable					(6,855)
Accruals and other liabilities					(4,896)
Advance billings					(1,095)
Other liabilities					(3,448)
Net liabilities assumed			11,913
Goodwill					$ 25,552
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed Less Deferred Acquisition Consideration, Net			$ 37,465
TMA Direct
Business Acquisition [Line Items]
Accounts receivable		$ 582
Other current assets		669
Intangible assets		13,200
Accounts payable		(379)
Accruals and other liabilities		(270)
Noncontrolling interests		(2,667)
Net liabilities assumed		11,135
Goodwill		6,569
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed Less Deferred Acquisition Consideration, Net		$ 17,704

Acquisitions and Dispositions_3

Acquisitions and Dispositions - Intangible Assets Acquired (Details) - USD ($) $ in Thousands	May 31, 2022	Apr. 19, 2022	Dec. 31, 2021	Aug. 02, 2021
MDC
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 810,900
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				13 years
MDC | Trade Names
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 98,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				10 years
MDC | Customer Relationships
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 712,900
MDC | Customer Relationships | Minimum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				6 years
MDC | Customer Relationships | Maximum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				15 years
Goodstuff Holdings Limited
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 14,974
Goodstuff Holdings Limited | Trade Names
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 1,349
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			15 years
Goodstuff Holdings Limited | Customer Relationships
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 13,625
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			10 years
TMA Direct
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 13,200,000	$ 12,410
TMA Direct | Trade Names
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 11,400,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years	10 years
TMA Direct | Customer Relationships
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 1,800,000	$ 5,390
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
TMA Direct | Other Intangible Assets
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 1,090
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		7 years
BNG | Trade Names
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 5,930
BNG | Customer Relationships
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 years

Acquisitions and Dispositions_4

Acquisitions and Dispositions - Pro Forma (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
MDC
Business Combinations [Abstract]
Business Acquisition, Pro Forma Revenue		$ 568,424		$ 1,612,399
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue		568,424		1,612,399
Goodstuff Holdings Limited
Business Combinations [Abstract]
Business Acquisition, Pro Forma Revenue	$ 471,406			872,192
Business Acquisition, Pro Forma Net Income (Loss)	8,357			33,894
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	471,406			872,192
Business Acquisition, Pro Forma Net Income (Loss)	$ 8,357			33,894
TMA Direct
Business Combinations [Abstract]
Business Acquisition, Pro Forma Revenue		468,862	$ 1,983,437	867,533
Business Acquisition, Pro Forma Net Income (Loss)		8,462	94,768	34,491
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue		468,862	1,983,437	867,533
Business Acquisition, Pro Forma Net Income (Loss)		8,462	94,768	34,491
BNG
Business Combinations [Abstract]
Business Acquisition, Pro Forma Revenue		473,539	1,989,833	878,610
Business Acquisition, Pro Forma Net Income (Loss)		7,031	92,670	30,495
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue		473,539	1,989,833	878,610
Business Acquisition, Pro Forma Net Income (Loss)		$ 7,031	$ 92,670	$ 30,495

Revenue - Additional Informatio

Revenue - Additional Information (Details)	9 Months Ended
	Sep. 30, 2022 country
Non-US And UK
Disaggregation of Revenue [Line Items]
Number of countries in which entity operates	30
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

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 663,791	$ 466,634	$ 1,979,607	$ 857,436
United States
Disaggregation of Revenue [Line Items]
Revenues	553,744	387,662	1,650,610	733,038
United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	42,774	32,218	125,950	62,416
Other
Disaggregation of Revenue [Line Items]
Revenues	67,273	46,754	203,047	61,982
Digital Transformation
Disaggregation of Revenue [Line Items]
Revenues	197,337	124,268	606,061	256,966
Creativity and Communications
Disaggregation of Revenue [Line Items]
Revenues	304,048	208,424	890,692	261,080
Performance Media and Data
Disaggregation of Revenue [Line Items]
Revenues	111,548	88,139	325,584	222,186
Consumer Insights and Strategy
Disaggregation of Revenue [Line Items]
Revenues	$ 50,858	$ 45,803	$ 157,270	$ 117,204

Revenue - Contract Assets and L

Revenue - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Unbilled service fees	$ 179,878	$ 116,558
Unbilled outside vendor costs, billable to clients	57,873	63,065
Advance billings	340,675	361,885
Increase (Decrease) in Advance Billings	(21,210)
Contract with Customer, Liability, Revenue Recognized	323,734
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	42,438
Unbilled service fees	$ 179,878	$ 116,558
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percent	32%
Expected timing of satisfaction	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percent	56%
Expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percent	12%
Expected timing of satisfaction	1 year

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator
Net Income (Loss) Attributable to Parent	$ 10,609	$ (2,071)	$ 33,747	$ 20,199
Net income available to stockholders, diluted		$ (4,545)		$ (4,545)
Denominator
Basic weighted average number of common shares outstanding (in shares)	125,384	76,106	124,710	76,106
Diluted weighted average number of common shares outstanding (in shares)	130,498	76,106	131,550	76,106
Basic (in dollars per share)	$ 0.08	$ (0.06)	$ 0.27	$ (0.06)
Diluted (in dollars per share)	$ 0.08	$ (0.06)	$ 0.26	$ (0.06)
Antidilutive securities excluded from computation of earnings per share (shares)			2,340
Net Income (Loss) Attributable to Noncontrolling Interest	$ (24,665)	$ (9,994)	$ (59,668)	$ (10,987)
Net income	35,274	7,923	93,415	31,186
Net loss attributable to Stagwell Inc. common shareholders		$ (4,545)		$ (4,545)
Stagwell Media
Denominator
Net Income (Loss) Attributable to Noncontrolling Interest	(19,286)		(51,027)
Stagwell Global
Denominator
Net Income (Loss) Attributable to Noncontrolling Interest	$ (5,379)		$ (8,641)
Common Class C
Denominator
Antidilutive securities excluded from computation of earnings per share (shares)		179,970		179,970
Stock Appreciation Rights and Restricted Awards
Denominator
Antidilutive securities excluded from computation of earnings per share (shares)		6,596		6,596
Stock Appreciation Rights (SARs)
Denominator
Weighted average number diluted shares outstanding adjustment	1,837		1,885
Restricted Stock Units (RSUs)
Denominator
Weighted average number diluted shares outstanding adjustment	3,277		4,955

Deferred Acquisition Consider_3

Deferred Acquisition Consideration (Details) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance of contingent payments		$ 222,369	$ 17,847	$ 17,847
Payments		71,865		12,431
Redemption value adjustments		(13,793)		18,721
Additions		24,594		198,937
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)		(1,576)		0
Other		(140)		(705)
Ending balance of contingent payments	$ 159,589	159,589		222,369
Business Acquisition [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases		24,594		$ 198,937
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances	$ 42,356
MDC
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Additions			61
Business Acquisition [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases			61
Concentric, Targeted Victory and Instrument
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Additions			136
Business Acquisition [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases			$ 136
BNG
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Additions		22,014
Business Acquisition [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases		$ 22,014

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($) lease	Sep. 30, 2022 USD ($) lease
Leases [Abstract]
Number of leases not yet commenced | lease	1	1
Leases not yet commenced, liability	$ 1,167	$ 1,167
Operating Lease, Impairment Loss	$ 1,734	$ 2,014

Leases - Lease Costs and Other

Leases - Lease Costs and Other Quantitative Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Operating lease cost	$ 19,966	$ 13,502	$ 54,929	$ 27,779
Variable lease cost	4,759	3,230	13,963	5,167
Sublease rental income	(3,636)	(2,359)	(11,128)	(4,290)
Total lease cost	21,089	14,373	57,764	28,656
Operating cash flows	22,694	16,490	69,827	29,854
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 5,189	$ 353,984	$ 27,878	$ 353,984
Weighted average remaining lease term (in years) - Operating leases	6 years 4 months 24 days		6 years 4 months 24 days
Weighted average discount rate - Operating leases	4.30%		4.30%

Leases - Minimum Future Rental

Leases - Minimum Future Rental Payments (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Leases [Abstract]
Remaining 2022	$ 20,551
2023	88,697
2023	75,684
2024	59,203
2025	44,170
2027 and thereafter	158,858
Total	447,163
Less: Present value discount	(65,342)
Lease liability	$ 381,821

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Aug. 20, 2021
Debt [Line Items]
Debt issuance costs	$ (15,866)	$ (18,564)
Total long-term debt	$ 1,329,134	1,191,601
Debt Disclosure [Text Block]	8. Debt As of September 30, 2022 and December 31, 2021, the Company’s indebtedness was comprised as follows: September 30, December 31, 2021 Revolving credit facility $ 245,000 $ 110,165 5.625% Notes 1,100,000 1,100,000 Debt issuance costs (15,866) (18,564) Total long-term debt $ 1,329,134 $ 1,191,601 Interest expense related to long-term debt included in Interest expense, net on the Unaudited Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2022 was $19,022 and $54,918, respectively, and for the three and nine months ended September 30, 2021 was $9,913 and $15,560, respectively. The amortization of debt issuance costs included in Interest expense, net on the Unaudited Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2022 was $573 and $1,784, respectively, and for the three and nine months ended September 30, 2021 was $1,623 and $2,092, respectively. Revolving Credit Agreement On November 18, 2019, the Company entered into a debt agreement (“JPM Syndicated Facility”) with a syndicate of banks led by JPMorgan Chase Bank, N.A (“JPM”). The JPM Syndicated Facility consisted of a five-year revolving credit facility of $265,000 (“JPM Revolver”) with the right to be increased by an additional $150,000. On March 18, 2020, the Company increased the commitments on the JPM Revolver by $60,000 to $325,000. On August 2, 2021, in connection with the closing of the acquisition of MDC, the Company entered into an amended and restated credit agreement (the “Combined Credit Agreement”) with a syndicate of banks led by JPM to increase commitments on the existing JPM Revolver. The Combined Credit Agreement consists of a $500,000 senior secured revolving credit facility with a five-year maturity. The Combined Credit Agreement contains sub-limits for revolving loans and letters of credit of $50,000 for loans denominated in pounds sterling or euros. It also includes an accordion feature under which the Company may request, subject to lender approval and certain conditions, to increase the amount of the commitments to an aggregate amount not to exceed $650,000. On April 28, 2022, the Company amended the Combined Credit Agreement. Among other things, this amendment replaced any references to LIBOR with references to SOFR. Borrowings pursuant to the Combined Credit Agreement, as amended, bear interest at a rate equal to, at the Company’s option, (i) the greatest of (a) the prime rate of interest in effect on such day, (b) the federal funds effective rate plus 0.50% and (c) SOFR plus 1% in each case, plus the applicable margin (calculated based on the Company’s Total Leverage Ratio, as defined in the Combined Credit Agreement) at that time. Additionally, the Combined Credit Agreement was amended to remove certain pre-commencement notice provisions for certain acquisitions under $50,000 in the aggregate, increased the amount permitted for certain investments allowed under the Combined Credit Agreement, and, subject to certain conditions, to allow for the repurchase of Stagwell Inc. stock in an amount not to exceed $100,000 in any fiscal year. All other substantive terms of the Combined Credit Agreement remain unchanged. Prior to April 28, 2022, borrowings under the Combined Credit Agreement bore interest at a rate equal to, at the Company’s option, (i) the greatest of (a) the prime rate of interest announced from time to time by JPM, (b) the federal funds effective rate from time to time plus 0.50% and (c) the LIBOR rate plus 1%, in each case, plus the applicable margin (calculated based on the Company’s total leverage ratio) at that time or (ii) the LIBOR rate plus the applicable margin (calculated based on the Company’s total leverage ratio) at that time. Advances under the Combined Credit Agreement may be prepaid in whole or in part from time to time without penalty or premium. The Combined Credit Agreement commitment may be reduced by the Company from time to time. Principal amounts outstanding under the Combined Credit Agreement are due and payable in full at maturity within five years of the date of the Combined Credit Agreement. If an event of default occurs under the Combined Credit Agreement or any future secured indebtedness, the holders of such secured indebtedness will have a prior right to our assets securing such indebtedness, to the exclusion of the holders of the 5.625% Notes (as defined below), even if we are in default with respect to the 5.625% Notes. In that event, our assets securing such indebtedness would first be used to repay in full all indebtedness and other obligations secured by them (including all amounts outstanding under the Combined Credit Agreement), resulting in all or a portion of our assets being unavailable to satisfy the claims of the holders of the 5.625% Notes and other unsecured indebtedness. The Combined Credit Agreement contains a number of financial and nonfinancial covenants and is guaranteed by substantially all of our present and future subsidiaries, subject to customary exceptions. The Company was in compliance with all covenants at September 30, 2022. A portion of the Combined Credit Agreement in an amount not to exceed $50,000 is available for the issuance of standby letters of credit. At September 30, 2022 and December 31, 2021, the Company had issued undrawn outstanding letters of credit of $24,973 and $24,332, respectively. Senior Notes In August 2021, the Company issued $1,100,000 aggregate principal amount of 5.625% senior notes (“5.625% Notes”). A portion of the proceeds from the issuance of the 5.625% Notes was used to redeem $870,300 aggregate principal amount of the outstanding 7.50% Senior Notes due 2024 (the “Existing Notes”) for a price of $904,200. This price is equal to 101.625% of the outstanding principal amount of the Existing Notes being redeemed, plus, accrued, and unpaid interest on the principal amount of such Existing Notes. The Company did not recognize a gain or loss on redemption. The 5.625% Notes are due August 15, 2029 and bear interest of 5.625% to be paid on February 15 and August 15 of each year, commencing on February 15, 2022. The 5.625% Notes are guaranteed on a senior unsecured basis by substantially all of the Company’s subsidiaries. The 5.625% Notes rank (i) equally in right of payment with all of the Company’s or any guarantor’s existing and future unsubordinated indebtedness, (ii) senior in right of payment to the Company’s or any guarantor’s existing and future subordinated indebtedness, (iii) effectively subordinated to any of the Company’s or any guarantor’s existing and future secured indebtedness to the extent of the collateral securing such indebtedness, including the Combined Credit Agreement, and (iv) structurally subordinated to all existing and future liabilities of the Company’s subsidiaries that are not guarantors. Our obligations under the 5.625% Notes are unsecured and are effectively junior to our secured indebtedness to the extent of the value of the collateral securing such secured indebtedness. Borrowings under the Combined Credit Agreement are secured by substantially all of the assets of the Company, and any existing and future subsidiary guarantors, including all of the capital stock of each restricted subsidiary. The Company may, at its option, redeem the 5.625% Notes in whole at any time or in part from time to time, on and after August 15, 2024 at a redemption price of 102.813% of the principal amount thereof if redeemed during the twelve-month period beginning on August 15, 2024, at a redemption price of 101.406% of the principal amount thereof if redeemed during the twelve-month period beginning on August 15, 2025 and at a redemption price of 100% of the principal amount thereof if redeemed on August 15, 2026 and thereafter. Prior to August 15, 2024, the Company may, at its option, redeem some or all of the 5.625% Notes at a price equal to 100% of the principal amount of the 5.625% Notes plus a “make whole” premium and accrued and unpaid interest. The Company may also redeem, at its option, prior to August 15, 2024, up to 40% of the 5.625% Notes with the net proceeds from one or more equity offerings at a redemption price of 105.625% of the principal amount thereof. If the Company experiences certain kinds of changes of control (as defined in the indenture), holders of the 5.625% Notes may require the Company to repurchase any 5.625% Notes held by them at a price equal to 101% of the principal amount of the 5.625% Notes plus accrued and unpaid interest. In addition, if the Company sells assets under certain circumstances, it must offer to repurchase the 5.625% Notes at a price equal to 100% of the principal amount of the 5.625% Notes plus accrued and unpaid interest. The indenture includes covenants that, among other things, restrict the Company’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 the Company; make certain types of investments; create restrictions on the payment of dividends or other amounts from the Company’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 the Company’s assets to, another person. These covenants are subject to a number of important limitations and exceptions. The 5.625% Notes are also subject to customary events of default, including cross-payment default and cross-acceleration provisions. The Company was in compliance with all covenants at September 30, 2022. Interest Rate Swap
Secured Debt | Revolving Credit Facility
Debt [Line Items]
Aggregate acquisition threshold related to precommencement notice provisions	$ 50,000
Combined Credit Agreement
Debt [Line Items]
Long-term Debt, Gross	245,000	110,165
Combined Credit Agreement | Secured Debt | Revolving Credit Facility
Debt [Line Items]
Aggregate acquisition threshold related to precommencement notice provisions	$ 100,000
Combined Credit Agreement | Secured Debt | SOFR | Revolving Credit Facility
Debt [Line Items]
Variable rate	1%
Combined Credit Agreement | Secured Debt | Federal Funds | Revolving Credit Facility
Debt [Line Items]
Variable rate	0.50%
5.625% Notes | Senior Notes
Debt [Line Items]
Long-term Debt, Gross	$ 1,100,000	$ 1,100,000
Interest rate, stated percentage			5.625%

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 20, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Aug. 02, 2021	Mar. 18, 2020	Nov. 18, 2019
Debt [Line Items]
Interest expense, long-term debt		$ 19,022	$ 9,913	$ 54,918	$ 15,560
Debt Disclosure [Text Block]				8. Debt As of September 30, 2022 and December 31, 2021, the Company’s indebtedness was comprised as follows: September 30, December 31, 2021 Revolving credit facility $ 245,000 $ 110,165 5.625% Notes 1,100,000 1,100,000 Debt issuance costs (15,866) (18,564) Total long-term debt $ 1,329,134 $ 1,191,601 Interest expense related to long-term debt included in Interest expense, net on the Unaudited Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2022 was $19,022 and $54,918, respectively, and for the three and nine months ended September 30, 2021 was $9,913 and $15,560, respectively. The amortization of debt issuance costs included in Interest expense, net on the Unaudited Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2022 was $573 and $1,784, respectively, and for the three and nine months ended September 30, 2021 was $1,623 and $2,092, respectively. Revolving Credit Agreement On November 18, 2019, the Company entered into a debt agreement (“JPM Syndicated Facility”) with a syndicate of banks led by JPMorgan Chase Bank, N.A (“JPM”). The JPM Syndicated Facility consisted of a five-year revolving credit facility of $265,000 (“JPM Revolver”) with the right to be increased by an additional $150,000. On March 18, 2020, the Company increased the commitments on the JPM Revolver by $60,000 to $325,000. On August 2, 2021, in connection with the closing of the acquisition of MDC, the Company entered into an amended and restated credit agreement (the “Combined Credit Agreement”) with a syndicate of banks led by JPM to increase commitments on the existing JPM Revolver. The Combined Credit Agreement consists of a $500,000 senior secured revolving credit facility with a five-year maturity. The Combined Credit Agreement contains sub-limits for revolving loans and letters of credit of $50,000 for loans denominated in pounds sterling or euros. It also includes an accordion feature under which the Company may request, subject to lender approval and certain conditions, to increase the amount of the commitments to an aggregate amount not to exceed $650,000. On April 28, 2022, the Company amended the Combined Credit Agreement. Among other things, this amendment replaced any references to LIBOR with references to SOFR. Borrowings pursuant to the Combined Credit Agreement, as amended, bear interest at a rate equal to, at the Company’s option, (i) the greatest of (a) the prime rate of interest in effect on such day, (b) the federal funds effective rate plus 0.50% and (c) SOFR plus 1% in each case, plus the applicable margin (calculated based on the Company’s Total Leverage Ratio, as defined in the Combined Credit Agreement) at that time. Additionally, the Combined Credit Agreement was amended to remove certain pre-commencement notice provisions for certain acquisitions under $50,000 in the aggregate, increased the amount permitted for certain investments allowed under the Combined Credit Agreement, and, subject to certain conditions, to allow for the repurchase of Stagwell Inc. stock in an amount not to exceed $100,000 in any fiscal year. All other substantive terms of the Combined Credit Agreement remain unchanged. Prior to April 28, 2022, borrowings under the Combined Credit Agreement bore interest at a rate equal to, at the Company’s option, (i) the greatest of (a) the prime rate of interest announced from time to time by JPM, (b) the federal funds effective rate from time to time plus 0.50% and (c) the LIBOR rate plus 1%, in each case, plus the applicable margin (calculated based on the Company’s total leverage ratio) at that time or (ii) the LIBOR rate plus the applicable margin (calculated based on the Company’s total leverage ratio) at that time. Advances under the Combined Credit Agreement may be prepaid in whole or in part from time to time without penalty or premium. The Combined Credit Agreement commitment may be reduced by the Company from time to time. Principal amounts outstanding under the Combined Credit Agreement are due and payable in full at maturity within five years of the date of the Combined Credit Agreement. If an event of default occurs under the Combined Credit Agreement or any future secured indebtedness, the holders of such secured indebtedness will have a prior right to our assets securing such indebtedness, to the exclusion of the holders of the 5.625% Notes (as defined below), even if we are in default with respect to the 5.625% Notes. In that event, our assets securing such indebtedness would first be used to repay in full all indebtedness and other obligations secured by them (including all amounts outstanding under the Combined Credit Agreement), resulting in all or a portion of our assets being unavailable to satisfy the claims of the holders of the 5.625% Notes and other unsecured indebtedness. The Combined Credit Agreement contains a number of financial and nonfinancial covenants and is guaranteed by substantially all of our present and future subsidiaries, subject to customary exceptions. The Company was in compliance with all covenants at September 30, 2022. A portion of the Combined Credit Agreement in an amount not to exceed $50,000 is available for the issuance of standby letters of credit. At September 30, 2022 and December 31, 2021, the Company had issued undrawn outstanding letters of credit of $24,973 and $24,332, respectively. Senior Notes In August 2021, the Company issued $1,100,000 aggregate principal amount of 5.625% senior notes (“5.625% Notes”). A portion of the proceeds from the issuance of the 5.625% Notes was used to redeem $870,300 aggregate principal amount of the outstanding 7.50% Senior Notes due 2024 (the “Existing Notes”) for a price of $904,200. This price is equal to 101.625% of the outstanding principal amount of the Existing Notes being redeemed, plus, accrued, and unpaid interest on the principal amount of such Existing Notes. The Company did not recognize a gain or loss on redemption. The 5.625% Notes are due August 15, 2029 and bear interest of 5.625% to be paid on February 15 and August 15 of each year, commencing on February 15, 2022. The 5.625% Notes are guaranteed on a senior unsecured basis by substantially all of the Company’s subsidiaries. The 5.625% Notes rank (i) equally in right of payment with all of the Company’s or any guarantor’s existing and future unsubordinated indebtedness, (ii) senior in right of payment to the Company’s or any guarantor’s existing and future subordinated indebtedness, (iii) effectively subordinated to any of the Company’s or any guarantor’s existing and future secured indebtedness to the extent of the collateral securing such indebtedness, including the Combined Credit Agreement, and (iv) structurally subordinated to all existing and future liabilities of the Company’s subsidiaries that are not guarantors. Our obligations under the 5.625% Notes are unsecured and are effectively junior to our secured indebtedness to the extent of the value of the collateral securing such secured indebtedness. Borrowings under the Combined Credit Agreement are secured by substantially all of the assets of the Company, and any existing and future subsidiary guarantors, including all of the capital stock of each restricted subsidiary. The Company may, at its option, redeem the 5.625% Notes in whole at any time or in part from time to time, on and after August 15, 2024 at a redemption price of 102.813% of the principal amount thereof if redeemed during the twelve-month period beginning on August 15, 2024, at a redemption price of 101.406% of the principal amount thereof if redeemed during the twelve-month period beginning on August 15, 2025 and at a redemption price of 100% of the principal amount thereof if redeemed on August 15, 2026 and thereafter. Prior to August 15, 2024, the Company may, at its option, redeem some or all of the 5.625% Notes at a price equal to 100% of the principal amount of the 5.625% Notes plus a “make whole” premium and accrued and unpaid interest. The Company may also redeem, at its option, prior to August 15, 2024, up to 40% of the 5.625% Notes with the net proceeds from one or more equity offerings at a redemption price of 105.625% of the principal amount thereof. If the Company experiences certain kinds of changes of control (as defined in the indenture), holders of the 5.625% Notes may require the Company to repurchase any 5.625% Notes held by them at a price equal to 101% of the principal amount of the 5.625% Notes plus accrued and unpaid interest. In addition, if the Company sells assets under certain circumstances, it must offer to repurchase the 5.625% Notes at a price equal to 100% of the principal amount of the 5.625% Notes plus accrued and unpaid interest. The indenture includes covenants that, among other things, restrict the Company’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 the Company; make certain types of investments; create restrictions on the payment of dividends or other amounts from the Company’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 the Company’s assets to, another person. These covenants are subject to a number of important limitations and exceptions. The 5.625% Notes are also subject to customary events of default, including cross-payment default and cross-acceleration provisions. The Company was in compliance with all covenants at September 30, 2022. Interest Rate Swap
Interest and Debt Expense
Debt [Line Items]
Amortization of debt issuance costs		573	$ 1,623	$ 1,784	$ 2,092
Interest Rate Swap | Accrued Expenses and Other Current Liabilities
Debt [Line Items]
Fair value						$ 77
Line of Credit | JPM Revolver | JPMorgan Chase Bank, N.A
Debt [Line Items]
Long-term debt, term									5 years
Maximum borrowing capacity								$ 325,000	$ 265,000
Right for additional borrowing capacity									$ 150,000
Additional borrowing capacity								$ 60,000
Secured Debt | Revolving Credit Facility
Debt [Line Items]
Aggregate acquisition threshold related to precommencement notice provisions		50,000		50,000
Secured Debt | Combined Credit Agreement | Revolving Credit Facility
Debt [Line Items]
Long-term debt, term							5 years
Maximum borrowing capacity							$ 500,000
Higher borrowing capacity option							650,000
Aggregate acquisition threshold related to precommencement notice provisions		100,000		$ 100,000
Secured Debt | Combined Credit Agreement | Revolving Credit Facility | Federal Funds
Debt [Line Items]
Variable rate				0.50%
Secured Debt | Combined Credit Agreement | Revolving Credit Facility | SOFR
Debt [Line Items]
Variable rate				1%
Secured Debt | Combined Credit Agreement Before Amendment | Revolving Credit Facility | Federal Funds
Debt [Line Items]
Variable rate				0.50%
Secured Debt | Combined Credit Agreement Before Amendment | Revolving Credit Facility | LIBOR
Debt [Line Items]
Variable rate				1%
Letter of Credit | Combined Credit Agreement | Revolving Credit Facility
Debt [Line Items]
Maximum borrowing capacity		$ 24,973		$ 24,973		$ 24,332
Higher borrowing capacity option							50,000
Standby Letters of Credit | Combined Credit Agreement | Revolving Credit Facility
Debt [Line Items]
Maximum borrowing capacity							$ 50,000
Senior Notes | 5.625% Notes
Debt [Line Items]
Aggregate principal amount	$ 1,100,000
Interest rate, stated percentage	5.625%
Percentage of principal amount redeemed	40%
Percentage of redemption price, change in ownership controllatest for redemption at face amount	101%
Percentage of redemption price, sale of certain assets	100%
Senior Notes | 5.625% Notes | Debt Instrument, Redemption, Period One
Debt [Line Items]
Redemption price, percentage	100%
Senior Notes | 5.625% Notes | Debt Instrument, Redemption, Period Two
Debt [Line Items]
Redemption price, percentage	102.813%
Senior Notes | 5.625% Notes | Debt Instrument, Redemption, Period Three
Debt [Line Items]
Redemption price, percentage	101.406%
Senior Notes | 5.625% Notes | Debt Instrument, Redemption, Period Four
Debt [Line Items]
Redemption price, percentage	100%
Senior Notes | 5.625% Notes | Debt Instrument, Redemption With Equity Offering proceeds, Period One
Debt [Line Items]
Redemption price, percentage	105.625%
Senior Notes | 7.50% Senior Notes
Debt [Line Items]
Aggregate principal amount	$ 870,300
Interest rate, stated percentage	7.50%
Redemption price, percentage	101.625%
Redemption price	$ 904,200

Noncontrolling and Redeemable_3

Noncontrolling and Redeemable Noncontrolling Interests (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest, Equity, Fair Value	$ 65,817	$ 43,364	$ 604
Vesting over period [Member]
Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest, Equity, Fair Value	62,197
Termination, disability, or death [Member]
Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest, Equity, Fair Value	$ 3,620

Noncontrolling and Redeemable_4

Noncontrolling and Redeemable Noncontrolling Interests - Changes in Noncontrolling Interests (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest		$ 21,573	$ 9,320	$ 55,110	$ 11,943
Nonredeemable Noncontrolling Interest		534,476		534,476		$ 508,287
Adjustments to Additional Paid in Capital, Changes due to Business Combinations	$ (771)	0	9,679	(1,000)	9,679
Net Income Loss Including Transfer from Non Controlling Interests		10,609	7,608	32,747	29,878
Stagwell Inc. Shareholders' Equity
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Changes due to Business Combinations	$ 9,679	0	9,679	(1,000)	9,679
Stagwell Global
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest		2,287	7,210	4,083	9,833
Nonredeemable Noncontrolling Interest		31,564		31,564		32,914
Stagwell Media
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest		19,286	$ 2,110	51,027	$ 2,110
Nonredeemable Noncontrolling Interest		$ 502,912		$ 502,912		$ 475,373

Noncontrolling and Redeemable_5

Noncontrolling and Redeemable Noncontrolling Interests - Changes in Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	9 Months Ended	12 Months Ended
	Aug. 01, 2021	Sep. 30, 2021	Sep. 30, 2022	Dec. 31, 2021
Noncontrolling Interest [Abstract]
Beginning Balance			$ 43,364	$ 604
Redemptions			3,511	15,231
Noncontrolling Interest, Increase from Business Combination			0	53,270
Changes in redemption value	$ (2,559)	$ 1,608	20,546	3,834
Net income (loss) attributable to redeemable noncontrolling interests			(4,558)	412
Other			860	1,299
Ending Balance			65,817	43,364
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Increase from Business Combination			0	$ 53,270
MDC
Noncontrolling Interest [Abstract]
Noncontrolling Interest, Increase from Business Combination			26
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Increase from Business Combination			26
Targeted Victory
Noncontrolling Interest [Abstract]
Noncontrolling Interest, Increase from Business Combination			27
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Increase from Business Combination			$ 27

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Details Textual) $ in Thousands	Sep. 30, 2022 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Purchase Obligation, to be Paid, Year One	$ 1,948
Purchase Obligation, to be Paid, Year Two	6,558
Purchase Obligation, to be Paid, Year Three	2,093
Purchase Obligation, to be Paid, Year Four	1,226
Purchase Obligation, to be Paid, Year Five	1,008
Purchase Obligation, to be Paid, after Year Five	$ 82

Share Capital (Details Textual)

Share Capital (Details Textual) $ / shares in Units, shares in Thousands, $ in Thousands			9 Months Ended
	Sep. 30, 2022 USD ($) vote $ / shares shares	Aug. 02, 2021 shares	Sep. 30, 2022 USD ($) vote $ / shares shares	Sep. 30, 2021 USD ($)	Mar. 23, 2022 USD ($)
Share Capital [Line Items]
Stock Repurchase Program, Authorized Amount | $					$ 125,000
Shares exchanged that trigger employee tax withholding obligation			5,000
Employee tax withholding obligation			2,000
Equity Exchange, Tax Withholding Obligation | $			$ 14,900
Stock Repurchased and Retired During Period, Shares	4,006
Shares acquired and cancelled | $			14,970	$ 820
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $	$ 96,249		$ 96,249
Stock Repurchased and Retired During Period | $ / shares	$ 7.16		$ 7.16
Repurchase of Common Stock | $	$ 28,671		$ 28,667	$ 0
Common Class A
Share Capital [Line Items]
Common Stock, Shares Authorized	1,000,000		1,000,000
Common Stock, Shares, Issued	131,540		131,540
Common stock, voting rights, number of votes per share | vote	1		1
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.001		$ 0.001
Shares issued in exchange			15,594
Common Class B
Share Capital [Line Items]
Common Stock, Shares Authorized	5		5
Common Stock, Shares, Issued	4		4
Common stock, voting rights, number of votes per share | vote	20		20
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.001		$ 0.001
Common Class C
Share Capital [Line Items]
Common Stock, Shares Authorized	250,000		250,000
Common Stock, Shares, Outstanding	164,376		164,376
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.00001		$ 0.00001
MDC | Common Class C | Stagwell Media
Share Capital [Line Items]
Shares issued in acquisition		179,970

Fair Value Measurements - Finan

Fair Value Measurements - Financial Instruments not measured at Fair Value on a Recurring Basis (Details) - Senior Notes - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,100,000	$ 1,100,000
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 896,500	$ 1,120,900

Fair Value Measurements - Fin_2

Fair Value Measurements - Financial Instruments Measured on a Recurring Basis (Details) - Fair Value, Inputs, Level 3	Sep. 30, 2022
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input [Extensible Enumeration]	Measurement Input, Discount Rate [Member]
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input [Extensible Enumeration]	Measurement Input, Discount Rate [Member]

Supplemental Information (Detai

Supplemental Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share Capital [Line Items]
Profit interest award liability	$ 32,198		$ 32,198
Stock-based compensation	$ 12,258	$ 53,465	33,410	$ 53,465
Goodwill, Impairment Loss			23,139
Common Class A
Share Capital [Line Items]
Stock-based compensation			26,288
Profit interest
Share Capital [Line Items]
Stock-based compensation			$ 5,550
Share-based awards
Share Capital [Line Items]
Awards granted			5,728

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income tax expense (benefit)		$ 11,540	$ 5,183	$ 20,150	$ 9,205
Pre-tax income		$ 46,601	$ 13,182	$ 112,512	$ 40,466
Effective tax rate (percent)		24.80%	39.30%	17.90%	22.70%
Reduction of deferred tax liability related to the exchange of Paired Units	$ 17,649			$ 20,763	$ 0
Reduction in deferred tax liability	$ 20,763

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 01, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Related Party Transaction [Line Items]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	$ 165,717				$ 204,929
Affiliated entity | Loan Agreement, Related Party
Related Party Transaction [Line Items]
Interest Income, Related Party		$ 80	$ 76	$ 234	227
Notes Receivable, Related Parties		4,029		4,029		$ 3,784
Affiliated entity | Technological Services
Related Party Transaction [Line Items]
Revenue from Related Parties		10	15	29	45
Due from Related Parties		36		36		137
Affiliated entity | Marketing services
Related Party Transaction [Line Items]
Revenue from Related Parties		905	63	1,388	155
Due from Related Parties		1,178		1,178		88
Affiliated entity | Polling Services
Related Party Transaction [Line Items]
Revenue from Related Parties		1,295	0	2,248	0
Due from Related Parties		0		0		0
Related Party Transaction, Expected Amount of Transactions with Related Party		3,800		3,800
Affiliated entity | Marketing and advertising services
Related Party Transaction [Line Items]
Revenue from Related Parties		866	203	2,038	272
Due from Related Parties		1,800		1,800		4,577
Affiliated entity | Sales and management services
Related Party Transaction [Line Items]
Expenses from transaction with related party		703	88	1,442	266
Due to Related Parties		1,685		1,685		442
Immediate family member of management | Marketing services
Related Party Transaction [Line Items]
Expenses from transaction with related party		0	0	40	0
Related Party Transaction, Expected Amount of Transactions with Related Party		40		40
Due to Related Parties		40		40		0
Immediate family member of management | Polling Services
Related Party Transaction [Line Items]
Revenue from Related Parties		201	224	779	343
Due from Related Parties		140		140		70
Related Party Transaction, Expected Amount of Transactions with Related Party		1,271		1,271
Immediate family member of management | Data management services
Related Party Transaction [Line Items]
Expenses from transaction with related party		890	422	1,705	1,178
Due to Related Parties		1,249		1,249		623
Director | Marketing and advertising services
Related Party Transaction [Line Items]
Revenue from Related Parties		2,064	0	3,315	0
Due from Related Parties		2,041		2,041		0
Stagwell Affiliate
Related Party Transaction [Line Items]
Noncash or Part Noncash Divestiture, Amount of Consideration Received					13
Stagwell Affiliate | Noncash investment agreement
Related Party Transaction [Line Items]
Amount of Transaction			300		12,400
Stagwell Affiliate | Cash investment agreement
Related Party Transaction [Line Items]
Amount of Transaction			1,600		1,600
Stagwell Affiliate | Beneficial owner | Marketing and Website Development Services
Related Party Transaction [Line Items]
Revenue from Related Parties		589	441	3,512	441
Due from Related Parties		333		333		$ 502
Related Party Transaction, Expected Amount of Transactions with Related Party		$ 5,689		$ 5,689
Stagwell Media | Affiliated entity
Related Party Transaction [Line Items]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared			$ 165,700		$ 191,900

Segment Information (Details 1)

Segment Information (Details 1) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) reportable_segment	Sep. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | reportable_segment			3
Revenues	$ 663,791	$ 466,634	$ 1,979,607	$ 857,436
Adjusted EBITDA	115,092	87,518	327,823	150,079
Depreciation, Depletion and Amortization, Nonproduction	(32,207)	(24,790)	(95,642)	(46,122)
Asset Impairment Charges	(25,211)	(14,926)	(28,034)	(14,926)
Stock-based compensation	(12,258)	(53,465)	(33,410)	(53,465)
Deferred Acquisition Consideration Expense (Income)	29,789	(3,422)	14,420	(9,456)
Other items, net	(5,152)	(10,549)	(12,112)	(15,298)
Operating income	70,053	(19,634)	173,045	10,812
Interest and Debt Expense	(19,672)	(11,912)	(56,552)	(15,197)
Foreign exchange, net	(3,927)	(893)	(4,163)	(1,955)
Other Nonoperating Income (Expense)	147	45,621	182	46,806
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	46,601	13,182	112,512	40,466
Income tax expense	11,540	5,183	20,150	9,205
Income Loss From Continuing Operations Before Equity In Earnings Of Non-consolidated Affiliates	35,061	7,999	92,362	31,261
Income (Loss) from Equity Method Investments	213	(76)	1,053	(75)
Net income	35,274	7,923	93,415	31,186
Net Income (Loss) Attributable to Noncontrolling Interest	(24,665)	(9,994)	(59,668)	(10,987)
Net Income (Loss) Attributable to Parent	10,609	(2,071)	33,747	20,199
Operating Segments | Integrated Agencies Network
Segment Reporting Information [Line Items]
Revenues	367,122	269,071	1,095,761	419,659
Adjusted EBITDA	76,224	66,063	215,920	100,264
Depreciation, Depletion and Amortization, Nonproduction	18,316	13,494	55,206	18,787
Stock-based compensation	(5,308)	(32,431)	(15,044)	(32,431)
Operating Segments | Media Network
Segment Reporting Information [Line Items]
Revenues	171,463	122,826	563,546	257,109
Adjusted EBITDA	24,312	17,664	89,259	30,485
Depreciation, Depletion and Amortization, Nonproduction	8,205	7,499	25,044	18,070
Stock-based compensation	(2,923)	(2,620)	(9,152)	(2,620)
Operating Segments | Communications Network
Segment Reporting Information [Line Items]
Revenues	121,770	67,348	311,075	157,794
Adjusted EBITDA	25,462	10,312	58,630	28,302
Depreciation, Depletion and Amortization, Nonproduction	2,654	2,110	7,718	5,087
Stock-based compensation	(671)	(15,384)	(1,077)	(15,384)
Operating Segments | All Other
Segment Reporting Information [Line Items]
Revenues	3,436	7,389	9,225	22,874
Adjusted EBITDA	(363)	419	(972)	(1,316)
Depreciation, Depletion and Amortization, Nonproduction	1,206	493	2,457	2,013
Stock-based compensation	(7)	(16)	(15)	(16)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Adjusted EBITDA	(10,543)	(6,940)	(35,014)	(7,656)
Depreciation, Depletion and Amortization, Nonproduction	1,826	1,194	5,217	2,165
Stock-based compensation	$ (3,349)	$ (3,014)	$ (8,122)	$ (3,014)

Uncategorized Items - stgw-2022

Label	Element	Value
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	$ 49,895,000
Stock Issued During Period, Value, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination	778,658,000
Contribution from Limited Liability Company (LLC)	stgw_ContributionFromLimitedLiabilityCompanyLLC	11,834,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	934,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	7,561,000
Stock Repurchased and Retired During Period, Value	us-gaap_StockRepurchasedAndRetiredDuringPeriodValue	820,000
Stockholders' Equity, Other	us-gaap_StockholdersEquityOther	161,000
Stockholders' Equity, Other	us-gaap_StockholdersEquityOther	55,000
Stockholders' Equity, Other	us-gaap_StockholdersEquityOther	(300,000)
Net Income (Loss) Attributable to Parent, Equity Statement Impact	stgw_NetIncomeLossAttributableToParentEquityStatementImpact	3,102,000
Net Income (Loss) Attributable to Parent, Equity Statement Impact	stgw_NetIncomeLossAttributableToParentEquityStatementImpact	2,229,000
Net Income (Loss) Attributable to Parent, Equity Statement Impact	stgw_NetIncomeLossAttributableToParentEquityStatementImpact	27,435,000
Retained Earnings [Member]
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	(4,545,000)
Redeemable noncontrolling interest, changes in redemption value	stgw_Redeemablenoncontrollinginterestchangesinredemptionvalue	(1,608,000)
Parent [Member]
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	49,895,000
Stock Issued During Period, Value, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination	142,242,000
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	24,742,000
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	3,032,000
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	(4,545,000)
Redeemable noncontrolling interest, changes in redemption value	stgw_Redeemablenoncontrollinginterestchangesinredemptionvalue	2,559,000
Redeemable noncontrolling interest, changes in redemption value	stgw_Redeemablenoncontrollinginterestchangesinredemptionvalue	(1,608,000)
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	165,717,000
Contribution from Limited Liability Company (LLC)	stgw_ContributionFromLimitedLiabilityCompanyLLC	11,834,000
Stock Repurchased and Retired During Period, Value	us-gaap_StockRepurchasedAndRetiredDuringPeriodValue	820,000
Stockholders' Equity, Other	us-gaap_StockholdersEquityOther	228,000
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	12,537,000
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	(375,000)
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	(63,000)
Noncontrolling Interest [Member]
Stock Issued During Period, Value, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination	636,416,000
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	2,693,000
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	6,774,000
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	70,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	7,561,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	934,000
Stockholders' Equity, Other	us-gaap_StockholdersEquityOther	173,000
Stockholders' Equity, Other	us-gaap_StockholdersEquityOther	(300,000)
Stockholders' Equity, Other	us-gaap_StockholdersEquityOther	161,000
Adjustments to Additional Paid in Capital, Changes due to Business Combinations	stgw_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations	(10,450,000)
AOCI Attributable to Parent [Member]
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	$ 12,537,000
Preferred Stock [Member]
Stock Issued During Period, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodNoncontrollingInterestIncreaseFromBusinessCombination	123,849,000
Stock Issued During Period, Value, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination	$ 209,980,000
Additional Paid-in Capital [Member]
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	49,895,000
Stock Issued During Period, Value, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination	110,555,000
Stock Repurchased and Retired During Period, Value	us-gaap_StockRepurchasedAndRetiredDuringPeriodValue	820,000
Stockholders' Equity, Other	us-gaap_StockholdersEquityOther	(228,000)
Adjustments to Additional Paid in Capital, Changes due to Business Combinations	stgw_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations	9,679,000
Member Units [Member]
Stock Issued During Period, Value, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination	(178,372,000)
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	3,032,000
Net Income (Loss), Including Noncontrolling Interests, Equity Statement Impact	stgw_NetIncomeLossIncludingNoncontrollingInterestsEquityStatementImpact	24,742,000
Redeemable noncontrolling interest, changes in redemption value	stgw_Redeemablenoncontrollinginterestchangesinredemptionvalue	2,559,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	165,717,000
Contribution from Limited Liability Company (LLC)	stgw_ContributionFromLimitedLiabilityCompanyLLC	11,834,000
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	(375,000)
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	$ (63,000)
Common Class A and B [Member]
Stock Repurchased and Retired During Period, Shares	us-gaap_StockRepurchasedAndRetiredDuringPeriodShares	12,000
Common Class A and B [Member] | Common Stock [Member]
Stock Issued During Period, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodNoncontrollingInterestIncreaseFromBusinessCombination	78,794,000
Stock Issued During Period, Value, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination	$ 77,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross	202,000
Common Class C [Member] | Common Stock [Member]
Stock Issued During Period, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodNoncontrollingInterestIncreaseFromBusinessCombination	179,970,000
Stock Issued During Period, Value, Noncontrolling Interest, Increase from Business Combination	stgw_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination	$ 2,000