Revenue and Related Matters (Tables)

3 Months Ended

Mar. 31, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue by Reportable Segment

Disaggregated Revenue — The Company’s disaggregated revenue by reportable segment is presented in the tables below for the periods indicated (in thousands).

By Primary Geographic Market (1)

Three Months Ended March 31, 2025
Primary Geographic Market	Research		Conferences		Consulting		Total
United States and Canada	$	847,281	$	55,584	$	90,964	$	993,829
Europe, Middle East and Africa	321,700		9,142		32,303		363,145
Other International	152,846		7,871		16,439		177,156
Total revenues	$	1,321,827	$	72,597	$	139,706	$	1,534,130
Three Months Ended March 31, 2024
Primary Geographic Market	Research		Conferences		Consulting		Total
United States and Canada	$	835,221	$	48,090	$	78,539	$	961,850
Europe, Middle East and Africa	287,543		10,328		36,602		334,473
Other International	145,408		11,651		19,544		176,603
Total revenues	$	1,268,172	$	70,069	$	134,685	$	1,472,926

(1)Revenue is reported based on where the sale is fulfilled.

Schedule of Disaggregation of Revenue

By Timing of Revenue Recognition

Three Months Ended March 31, 2025
Timing of Revenue Recognition	Research		Conferences		Consulting		Total
Transferred over time (1)	$	1,252,588	$	—	$	104,152	$	1,356,740
Transferred at a point in time (2)	69,239		72,597		35,554		177,390
Total revenues	$	1,321,827	$	72,597	$	139,706	$	1,534,130
Three Months Ended March 31, 2024
Timing of Revenue Recognition	Research		Conferences		Consulting		Total
Transferred over time (1)	$	1,182,268	$	—	$	108,587	$	1,290,855
Transferred at a point in time (2)	85,904		70,069		26,098		182,071
Total revenues	$	1,268,172	$	70,069	$	134,685	$	1,472,926

(1)Research revenues in this category are recognized in connection with performance obligations that are satisfied over time using a time-elapsed output method to measure progress. Consulting revenues in this category are recognized over time using costs incurred to date relative to total estimated costs at completion.

(2)The revenues in this category are recognized in connection with performance obligations that are satisfied at the point in time that the contractual deliverables are provided to the customer.

Schedule for Contract with Customer, Asset and Liability

The table below provides information regarding certain of the Company’s balance sheet accounts that pertain to its contracts with customers (in thousands).

	March 31,		December 31,
	2025		2024
Assets:
Fees receivable, gross (1)	$	1,511,082	$	1,704,725
Contract assets recorded in Prepaid expenses and other current assets (2)	$	29,660	$	31,056
Contract liabilities:
Deferred revenues (current liability) (3)	$	2,922,518	$	2,762,927
Non-current deferred revenues recorded in Other liabilities (3)	32,319		27,389
Total contract liabilities	$	2,954,837	$	2,790,316

(1)Fees receivable represent an unconditional right to payment from the Company’s customers and include both billed and unbilled amounts.

(2)Contract assets represent recognized revenue for which the Company does not have an unconditional right to payment as of the balance sheet date because the project may be subject to a progress billing milestone or some other billing restrictions.

(3)Deferred revenues represent amounts (i) for which the Company has received an upfront customer payment or (ii) that pertain to recognized fees receivable. Both situations occur before the completion of the Company’s performance obligation(s).