Segment Information (Tables)

6 Months Ended

Jun. 30, 2025

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

	Three Months Ended June 30, 2025
	Integrated Agencies Network		Brand Performance Network		Communications Network		Total
	(dollars in thousands)
Revenue (1)	$	406,190	$	170,099	$	106,128	$	682,417
Billable costs	61,302		15,231		31,786		108,319
Staff costs	205,975		100,260		44,812		351,047
Administrative costs	34,094		25,584		9,550		69,228
Unbillable and other costs *	27,309		13,443		625		41,377
Adjusted EBITDA	77,510		15,581		19,355		112,446
Adjusted EBITDA - All Other							(6,945)
Adjusted EBITDA - Corporate							(12,646)
Total Consolidated Adjusted EBITDA							92,855
Stock-based compensation							19,954
Depreciation and amortization							41,369
Deferred acquisition consideration							(3,220)
Other items, net							11,580
Operating Income							23,172
Other income (expenses):
Interest expense, net							(23,455)
Foreign exchange, net							(1,338)
Other, net							(360)
							(25,153)
Loss before income taxes and equity in earnings of non-consolidated affiliates							(1,981)
Income tax expense							2,673
Loss before equity in earnings of non-consolidated affiliates							(4,654)
Equity in income of non-consolidated affiliates							20
Net loss							(4,634)
Net income attributable to noncontrolling and redeemable noncontrolling interests							(627)
Net loss attributable to Stagwell Inc. common shareholders							$	(5,261)

(1) Total consolidated revenue of $706,818 also includes revenue of $24,401 associated with operating segments that do not meet the aggregation criteria and elimination of certain intercompany service and revenue.

*For each reportable segment, Unbillable and other costs includes costs to fulfill customer contract requirements such as research and subscription related costs, audience measurement, data and analytics, and panels and survey costs; and also includes travel related expenses associated with contract fulfillment.

	Six Months Ended June 30, 2025
	Integrated Agencies Network		Brand Performance Network		Communications Network		Total
	(dollars in thousands)
Revenue (1)	$	783,544	$	332,317	$	193,756	$	1,309,617
Billable costs	112,862		30,591		52,416		195,869
Staff costs	405,857		196,710		89,389		691,956
Administrative costs	65,738		48,991		19,724		134,453
Unbillable and other costs *	44,408		28,901		1,115		74,424
Adjusted EBITDA	154,679		27,124		31,112		212,915
Adjusted EBITDA - All Other							(13,275)
Adjusted EBITDA - Corporate							(26,203)
Total Consolidated Adjusted EBITDA							173,437
Stock-based compensation							31,497
Depreciation and amortization							83,375
Deferred acquisition consideration							3,437
Other items, net							13,671
Operating Income							41,457
Other income (expenses):
Interest expense, net							(46,811)
Foreign exchange, net							(118)
Other, net							(111)
							(47,040)
Loss before income taxes and equity in earnings of non-consolidated affiliates							(5,583)
Income tax expense							4,395
Loss before equity in earnings of non-consolidated affiliates							(9,978)
Equity in income of non-consolidated affiliates							19
Net loss							(9,959)
Net loss attributable to noncontrolling and redeemable noncontrolling interests							1,781
Net loss attributable to Stagwell Inc. common shareholders							$	(8,178)

(1) Total consolidated revenue of $1,358,558 also includes revenue of $48,941 associated with operating segments that do not meet the aggregation criteria and elimination of certain intercompany service and revenue.

*For each reportable segment, Unbillable and other costs includes costs to fulfill customer contract requirements such as research and subscription related costs, audience measurement, data and analytics, and panels and survey costs; and also includes travel related expenses associated with contract fulfillment.

	Three Months Ended June 30, 2024
	Integrated Agencies Network		Brand Performance Network		Communications Network		Total
	(dollars in thousands)
Revenue (1)	$	385,133	$	177,245	$	105,570	$	667,948
Billable costs	63,263		20,137		33,177		116,577
Staff costs	195,193		99,264		41,131		335,588
Administrative costs	33,902		24,525		8,379		66,806
Unbillable and other costs *	24,780		15,613		710		41,103
Adjusted EBITDA	67,995		17,706		22,173		107,874
Adjusted EBITDA - All Other							(3,149)
Adjusted EBITDA - Corporate							(18,622)
Total Consolidated Adjusted EBITDA							86,103
Stock-based compensation							5,875
Depreciation and amortization							42,001
Deferred acquisition consideration							7,236
Impairment and other losses							215
Other items, net							8,869
Operating Income							21,907
Interest expense, net							(23,533)
Foreign exchange, net							(1,355)
Other, net							193
							(24,695)
Loss before income taxes and equity in earnings of non-consolidated affiliates							(2,788)
Income tax expense							1,165
Loss before equity in earnings of non-consolidated affiliates							(3,953)
Equity in loss of non-consolidated affiliates							(1)
Net loss							(3,954)
Net loss attributable to noncontrolling and redeemable noncontrolling interests							989
Net loss attributable to Stagwell Inc. common shareholders							$	(2,965)

(1) Total consolidated revenue of $671,168 also includes revenue of $3,220 associated with operating segments that do not meet the aggregation criteria and elimination of certain intercompany service and revenue.

*For each reportable segment, Unbillable and other costs includes costs to fulfill customer contract requirements such as research and subscription related costs, audience measurement, data and analytics, and panels and survey costs; and also includes travel related expenses associated with contract fulfillment.

	Six Months Ended June 30, 2024
	Integrated Agencies Network		Brand Performance Network		Communications Network		Total
	(dollars in thousands)
Revenue (1)	$	737,852	$	391,207	$	199,316	$	1,328,375
Billable costs	123,210		71,537		59,435		254,182
Staff costs	381,727		197,695		80,395		659,817
Administrative costs	64,504		46,596		17,083		128,183
Unbillable and other costs *	40,308		30,179		846		71,333
Adjusted EBITDA	128,103		45,200		41,557		214,860
Adjusted EBITDA - All Other							(7,135)
Adjusted EBITDA - Corporate							(31,306)
Total Consolidated Adjusted EBITDA							176,419
Stock-based compensation							21,991
Depreciation and amortization							76,837
Deferred acquisition consideration							7,390
Impairment and other losses							1,715
Other items, net							20,725
Operating Income							47,761
Other income (expenses):
Interest expense, net							(44,498)
Foreign exchange, net							(3,613)
Other, net							(1,074)
							(49,185)
Loss before income taxes and equity in earnings of non-consolidated affiliates							(1,424)
Income tax expense							3,750
Loss before equity in earnings of non-consolidated affiliates							(5,174)
Equity in income of non-consolidated affiliates							507
Net loss							(4,667)
Net loss attributable to noncontrolling and redeemable noncontrolling interests							420
Net loss attributable to Stagwell Inc. common shareholders							$	(4,247)

(1) Total consolidated revenue of $1,341,227 also includes revenue of $12,852 associated with operating segments that do not meet the aggregation criteria and elimination of certain intercompany service and revenue.

*For each reportable segment, Unbillable and other costs includes costs to fulfill customer contract requirements such as research and subscription related costs, audience measurement, data and analytics, and panels and survey costs; and also includes travel related expenses associated with contract fulfillment.