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Segment Information
 12 Months Ended
Dec. 31, 2025
Segment Reporting [Abstract]  
Segment Information Segment Information
The Company’s products and services are delivered through three reportable segments – Insights, Conferences and Consulting, as described below.
 
•Insights equips executives and their teams from every major function, geography, industry and sector with actionable, objective insights, guidance and tools. Our experts deliver proprietary insights that are informed by thoroughly vetted practitioner-sourced and data-driven research to help our clients address their mission-critical priorities.

•Conferences provides executives and teams across an organization the opportunity to learn, share and network. From our Gartner Symposium/Xpo series, to industry-leading conferences focused on specific business roles and topics, to peer-driven sessions, our offerings enable attendees to experience the best of Gartner insights and guidance.
•Consulting serves senior executives leading technology-driven strategic initiatives leveraging the power of Gartner’s actionable, objective insight. Through custom analysis and on-the-ground support we enable optimized technology investments and stronger performance on our clients’ mission-critical priorities.

The Company's Chief Executive Officer is its chief operating decision maker (CODM). The CODM evaluates segment performance and allocates resources based on gross contribution. Gross contribution, as presented in the tables below, is defined as operating income or loss excluding certain Cost of services and product development expenses, Selling, general and administrative expenses, Depreciation, Amortization of intangibles, Acquisition and integration charges, Goodwill impairment and Gain from sale of divested operation. Certain bonus and fringe benefit costs included in consolidated Cost of services and product development are not allocated to segment expense. The CODM uses gross contribution to allocate resources (including financial resources and employees) for each segment primarily in the Company's annual budgeting process. The CODM then monitors budgeted versus actual results regularly to assess segment operating performance, identify business trends, and modify resource allocations as needed. The accounting policies used by the reportable segments are the same as those used by the Company. There are no intersegment revenues. The Company does not identify or allocate tangible assets, including capital expenditures, by reportable segment. Accordingly, tangible assets are not reported by segment because the information is not available by segment and is not reviewed in the evaluation of segment performance or in making decisions regarding the allocation of resources.

The Company earns revenue from clients in many countries. Other than the United States, there is no individual country where revenues from external clients represent 10% or more of the Company’s consolidated revenues. Additionally, no single client accounted for 10% or more of the Company’s consolidated revenues and the loss of a single client, in management’s opinion, would not have a material adverse effect on revenues.

The tables below present information about the Company’s reportable segments for the years ended December 31 (in thousands).
2025
InsightsConferencesConsultingOther (1)Consolidated
Revenues$5,072,570 $644,743 $552,499 $227,414 $6,497,226 
Less:
Personnel expenses1,128,600 73,647 334,762 33,622 1,570,631 
Product and content delivery expenses28,215 229,081 15,518 123,102 395,916 
Other expenses (2)25,570 19,171 15,789 1,933 62,463 
Gross contribution3,890,185 322,844 186,430 68,757 4,468,216 
Cost of services and product development - unallocated (3)24,565 
Selling, general and administrative3,067,631 
Depreciation and amortization200,309 
Goodwill impairment150,000 
Interest expenses and other, net57,593 
Income before income taxes$968,118 
2024
InsightsConferencesConsultingOther (1)Consolidated
Revenues$4,829,051 $583,224 $558,537 $296,599 $6,267,411 
Less:
Personnel expenses1,080,226 67,326 324,890 45,468 1,517,910 
Product and content delivery expenses27,452 215,664 14,775 152,332 410,223 
Other expenses (2)24,540 18,825 15,580 2,789 61,734 
Gross contribution3,696,833 281,409 203,292 96,010 4,277,544 
Cost of services and product development - unallocated (3)33,155 
Selling, general and administrative2,884,814 
Depreciation and amortization202,315 
Acquisition and integration charges973 
Interest expenses and other, net68,913 
Gain on event cancellation insurance claims(300,000)
Income before income taxes$1,387,374 

2023
Insights
ConferencesConsultingOther (1)Consolidated
Revenues$4,516,035 $505,164 $514,746 $371,011 $5,906,956 
Less:
Personnel expenses1,023,053 56,708 308,580 48,262 1,436,603 
Product and content delivery expenses29,821 178,675 8,978 163,413 380,887 
Other expenses (2)19,430 16,042 15,687 2,924 54,083 
Gross contribution3,443,731 253,739 181,501 156,412 4,035,383 
Cost of services and product development - unallocated (3)31,667 
Selling, general and administrative2,701,542 
Depreciation and amortization191,103 
Acquisition and integration charges9,587 
Gain from sale of divested operation(135,410)
Interest expenses and other, net92,842 
Gain on event cancellation insurance claims(3,077)
Income before income taxes$1,147,129 



(1)Other includes our Digital Markets operating segment.
(2)Other expenses consist primarily of travel and entertainment and workplace expenses.
(3)The unallocated amounts consist of certain bonus and fringe costs recorded in consolidated Cost of services and product development that are not allocated to segment expense. The Company’s policy is to allocate bonuses to segments at 100% of a segment employee’s target bonus. Amounts above or below 100% are absorbed by corporate.

Disaggregated revenue information by reportable segment for the three years ended December 31, 2025 is presented in Note 9 — Revenue and Related Matters. Long-lived asset information by geographic location as of December 31 is summarized in the table below (in thousands).
 20252024
Long-lived assets (1):  
United States and Canada $572,869 $574,559 
Europe, Middle East and Africa304,606 326,196 
Other International64,483 97,491 
Total long-lived assets$941,958 $998,246 
(1)Excludes goodwill and intangible assets for all dates.