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Segment Information | 9 Months Ended
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Sep. 30, 2025
Segment Reporting [Abstract] |
Segment Information | Segment Information The Company’s products and services are delivered through three reportable segments – Business and Technology Insights, or “Insights”, Conferences and Consulting, as described below. •Insights equips executives and their teams from every function and across all industries with actionable, objective business and technology insights, guidance and tools. Our experienced experts deliver all this value informed by an unmatched combination of 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 insights. 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 assets, including capital expenditures, by reportable segment. Accordingly, 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 tables below present information about the Company’s reportable segments for the periods indicated (in thousands).
Three Months Ended September 30, 2025 | Insights | Conferences | Consulting | Other (1) | Consolidated
Revenues | $ | 1,270,724 |  | $ | 74,554 |  | $ | 123,573 |  | $ | 55,221 |  | $ | 1,524,072 |
Less: |  |  |  |  |
Personnel expenses | 282,516 |  | 18,389 |  | 81,040 |  | 5,843 |  | 387,788 |
Product and content delivery expenses | 8,102 |  | 25,533 |  | 3,588 |  | 28,738 |  | 65,961 |
Other expenses (2) | 5,783 |  | 3,320 |  | 3,723 |  | 571 |  | 13,397 |
Gross contribution | 974,323 |  | 27,312 |  | 35,222 |  | 20,069 |  | 1,056,926 |
Cost of services and product development - unallocated (3) |  |  |  |  | 7,072 |
Selling, general and administrative |  |  |  |  | 762,557 |
Depreciation and amortization |  |  |  |  | 50,953 |
Goodwill impairment |  |  |  |  | 150,000 |
Interest expenses and other, net |  |  |  |  | 16,862 |
Income before income taxes |  |  |  |  | $ | 69,482 |
Three Months Ended September 30, 2024 | Insights | Conferences | Consulting | Other (1) | Consolidated
Revenues | $ | 1,209,524 |  | $ | 75,776 |  | $ | 127,622 |  | $ | 71,384 |  | $ | 1,484,306 |
Less: |  |  |  |  |
Personnel expenses | 271,718 |  | 16,621 |  | 78,406 |  | 11,682 |  | 378,427 |
Product and content delivery expenses | 7,427 |  | 25,765 |  | 3,971 |  | 39,249 |  | 76,412 |
Other expenses (2) | 6,607 |  | 2,901 |  | 3,728 |  | 799 |  | 14,035 |
Gross contribution | 923,772 |  | 30,489 |  | 41,517 |  | 19,654 |  | 1,015,432 |
Cost of services and product development - unallocated (3) |  |  |  |  | 6,468 |
Selling, general and administrative |  |  |  |  | 711,729 |
Depreciation and amortization |  |  |  |  | 51,252 |
Acquisition and integration charges |  |  |  |  | 159 |
Interest expenses and other, net |  |  |  |  | 18,952 |
Gain on event cancellation insurance claims |  |  |  |  | (300,000) |
Income before income taxes |  |  |  |  | $ | 526,872 |
Nine Months Ended September 30, 2025 | Insights | Conferences | Consulting | Other (1) | Consolidated
Revenues | $ | 3,789,798 |  | $ | 358,558 |  | $ | 418,873 |  | $ | 177,427 |  | $ | 4,744,656 |
Less: |  |  |  |  |
Personnel expenses | 850,941 |  | 55,015 |  | 246,644 |  | 26,305 |  | 1,178,905 |
Product and content delivery expenses | 19,429 |  | 114,901 |  | 10,902 |  | 96,886 |  | 242,118 |
Other expenses (2) | 18,426 |  | 12,560 |  | 11,158 |  | 1,648 |  | 43,792 |
Gross contribution | 2,901,002 |  | 176,082 |  | 150,169 |  | 52,588 |  | 3,279,841 |
Cost of services and product development - unallocated (3) |  |  |  |  | 16,164 |
Selling, general and administrative |  |  |  |  | 2,269,753 |
Depreciation and amortization |  |  |  |  | 152,452 |
Goodwill impairment |  |  |  |  | 150,000 |
Interest expenses and other, net |  |  |  |  | 37,189 |
Income before income taxes |  |  |  |  | $ | 654,283 |
Nine Months Ended September 30, 2024 | Insights | Conferences | Consulting | Other (1) | Consolidated
Revenues | $ | 3,582,238 |  | $ | 331,929 |  | $ | 405,291 |  | $ | 232,834 |  | $ | 4,552,292 |
Less: |  |  |  |  |
Personnel expenses | 804,736 |  | 48,844 |  | 233,800 |  | 35,409 |  | 1,122,789 |
Product and content delivery expenses | 17,466 |  | 109,614 |  | 10,844 |  | 116,854 |  | 254,778 |
Other expenses (2) | 17,325 |  | 11,615 |  | 11,124 |  | 2,166 |  | 42,230 |
Gross contribution | 2,742,711 |  | 161,856 |  | 149,523 |  | 78,405 |  | 3,132,495 |
Cost of services and product development - unallocated (3) |  |  |  |  | 28,300 |
Selling, general and administrative |  |  |  |  | 2,113,633 |
Depreciation and amortization |  |  |  |  | 151,093 |
Acquisition and integration charges |  |  |  |  | 977 |
Interest expenses and other, net |  |  |  |  | 52,766 |
Gain on event cancellation insurance claims |  |  |  |  | (300,000) |
Income before income taxes |  |  |  |  | $ | 1,085,726 |
(1)Other includes our Digital Markets operating segment. (2)Other consists 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.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-21 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name 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