0000749251-26-000112 | 10-K | XBRL Viewer

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Stockholders' Equity - Narrative (Details) $ / shares in Units, $ in Millions	Jan. 29, 2026 USD ($)	Dec. 31, 2025 USD ($) vote $ / shares	Sep. 30, 2025 USD ($)	Dec. 31, 2024 $ / shares	Dec. 31, 2015 USD ($)
Share Repurchase Program [Line Items]
Common stock, par value (in dollars per share) \| $ / shares		$ 0.0005		$ 0.0005
Common stock, number of votes per share \| vote		1
Share repurchase program, authorized amount		$ 7,000	$ 5,800		$ 1,200
Stock repurchase program, remaining authorized repurchase amount		$ 700
Subsequent Event
Share Repurchase Program [Line Items]
Stock repurchase program, remaining authorized repurchase amount	$ 750
Stock repurchase program, additional authorized amount	$ 500

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Dec. 31, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill. The table below presents changes to the carrying amount of goodwill by segment during the two-year period ended December 31, 2025 (in thousands).


	Insights		Conferences		Consulting		Other		Total
Balance at December 31, 2023	$	2,460,448	$	183,997	$	95,714	$	197,101	$	2,937,260
Additions due to an acquisition
Foreign currency translation impact	(6,568)		(77)		(410)		—		(7,055)
Balance at December 31, 2024	2,453,880		183,920		95,304		197,101		2,930,205
Impairment loss (1)	—		—		—		(150,000)		(150,000)
Reclassified as held-for-sale (2)	—		—		—		(49,057)		(49,057)
Foreign currency translation impact	6,435		132		1,131		1,956		9,654
Balance at December 31, 2025	$	2,460,315	$	184,052	$	96,435	$	—	$	2,740,802

Accumulated impairment loss (1)	$	—	$	—	$	—	$	(150,000)	$	(150,000)

(1)The Company recognized an impairment loss of $150.0 million during the year ended December 31, 2025.

(2)Represents amounts reclassified to Assets held-for-sale due to the pending divestiture of the Company’s Digital Markets business. See Note 19 — Subsequent Events for additional information.

Finite-lived intangible assets. Changes in finite-lived intangible assets during the two-year period ended December 31, 2025 are presented in the tables below (in thousands).


December 31, 2025	Customer Relationships		Other		Total
Gross cost at December 31, 2024	1,071,917		10,200		$	1,082,117

Intangible assets fully amortized	(73,589)		—		(73,589)

Foreign currency translation impact	23,429		—		23,429
Gross cost	1,021,757		10,200		1,031,957
Accumulated amortization (1)	(687,416)		(8,238)		(695,654)
Balance at December 31, 2025	$	334,341	$	1,962	$	336,303


December 31, 2024	Customer Relationships		Technology-related		Other		Total
Gross cost at December 31, 2023	$	1,077,183	$	11,200	$	10,200	$	1,098,583

Intangible assets fully amortized	—		(11,200)		—		(11,200)
Foreign currency translation impact	(5,266)		—		—		(5,266)
Gross cost	1,071,917		—		10,200		1,082,117
Accumulated amortization (1)	(665,131)		—		(7,297)		(672,428)
Balance at December 31, 2024	$	406,786	$	—	$	2,903	$	409,689

(1)Finite-lived intangible assets are amortized using the straight-line method over the following periods: Customer relationships—6 to 13 years; Technology-related—3 to 7 years; and Other —11 years.

Amortization expense related to finite-lived intangible assets was $82.3 million, $90.2 million and $92.5 million in 2025, 2024 and 2023, respectively. The estimated future amortization expense by year for finite-lived intangible assets is presented in the table below (in thousands).


2026	$	80,193
2027	79,585
2028	78,114
2029	78,035
2030	20,376
	$	336,303

Debt - Interest Rate Swaps (Details)	Sep. 29, 2025 USD ($) contract	Dec. 31, 2024 USD ($) contract
Derivative [Line Items]
Number of contracts \| contract		120
Interest rate swap contracts total notional value \| $		$ 1,006,904,000
Interest rate swap
Derivative [Line Items]
Term of contract	30 days
Interest rate swap \| Minimum
Derivative [Line Items]
Fixed interest rate	2.98%
Interest rate swap \| Debt Instrument, Redemption, Period One
Derivative [Line Items]
Number of contracts \| contract	1
Interest rate swap contracts total notional value \| $	$ 350,000,000

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References + Details

Cover Page - USD ($) $ in Billions	12 Months Ended
Cover Page - USD ($) $ in Billions	Dec. 31, 2025	Feb. 05, 2026	Jun. 30, 2025
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-14443
Entity Registrant Name	GARTNER, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3099750
Entity Address, Address Line One	P.O. Box 10212
Entity Address, Address Line Two	56 Top Gallant Road
Entity Address, City or Town	Stamford,
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06902-7700
City Area Code	203
Local Phone Number	964-0096
Title of 12(b) Security	Common Stock, $0.0005 par value per share
Trading Symbol	IT
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 30.3
Entity Common Stock, Shares Outstanding		70,450,294
Documents Incorporated by Reference	The definitive Proxy Statement for the Annual Meeting of Stockholders (the “2026 Proxy Statement”) is incorporated by reference into Part III to the extent described therein.
Entity Central Index Key	0000749251
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Amendment Flag	false

Fair Value Disclosures - Assets And Liabilities Measured At Fair Value On Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Assets:
Total Assets	$ 176,306	$ 151,706
Liabilities:
Total Liabilities	179,270	150,432
Money market funds at carrying value	19,200	18,100
Cash surrender value of life insurance	155,900	128,700
Level 1
Assets:
Total Assets	19,188	18,089
Level 1 \| Deferred compensation plan assets
Assets:
Total Assets	19,188	18,089
Level 2
Assets:
Total Assets	157,118	133,617
Liabilities:
Total Liabilities	179,270	150,432
Level 2 \| Foreign currency forward contracts
Assets:
Total Assets	1,169	1,852
Liabilities:
Total Liabilities	939	1,868
Level 2 \| Interest rate swap contracts
Assets:
Total Assets	0	3,095
Level 2 \| Deferred compensation plan assets
Assets:
Total Assets	155,949	128,670
Level 2 \| Deferred compensation plan liabilities
Liabilities:
Total Liabilities	$ 178,331	$ 148,564

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Schedule of Components of Income before Income Taxes

Below is a summary of the components of the Company’s income before income taxes for the years ended December 31 (in thousands).


	2025		2024		2023
U.S.	$	302,391	$	629,656	$	574,458
Non-U.S.	665,727		757,718		572,671
Income before income taxes	$	968,118	$	1,387,374	$	1,147,129

Schedule of Components of Income Tax

The components of the expense (benefit) for income taxes on the above income are summarized in the table below (in thousands).


	2025		2024		2023
Current tax expense:
U.S. federal	$	104,476	$	161,155	$	171,917
State and local	36,615		48,084		51,441
Foreign	95,788		88,318		107,421
Total current	236,879		297,557		330,779
Deferred tax (benefit) expense:
U.S. federal	(9,578)		(31,708)		(35,457)
State and local	(1,834)		963		(13,475)
Foreign	17,386		(128,291)		(12,845)
Total deferred	5,974		(159,036)		(61,777)
Total current and deferred	242,853		138,521		269,002
Expense relating to interest rate swaps used to increase equity	(3,405)		(4,695)		(4,976)
Benefit from stock transactions with employees used to increase equity	113		97		105
Benefit (expense) relating to defined-benefit pension adjustments used to increase equity	(674)		(264)		532
Total tax expense	$	238,887	$	133,659	$	264,663

Schedule of Deferred Tax Assets and Liabilities

The components of long-term deferred tax assets (liabilities) are summarized in the table below (in thousands).


	December 31,
	2025		2024
Accrued liabilities	$	110,054	$	86,831
Operating leases	32,590		41,777
Intangible assets	—		132,292
Property, equipment and leasehold improvements	5,480		11,592
Loss and credit carryforwards	191,660		61,313
Assets relating to equity compensation	40,078		37,247
Other assets	7,547		16,870
Gross deferred tax assets	387,409		387,922
Valuation allowance	(86,787)		(76,285)
Net deferred tax assets	300,622		311,637

Intangible assets	(1,879)		—
Prepaid expenses	(70,155)		(79,559)
Other liabilities	(12,468)		(18,063)
Gross deferred tax liabilities	(84,502)		(97,622)
Net deferred tax assets	$	216,120	$	214,015

Schedule of Differences Between U.S. Federal Statutory Income Tax Rate and Effective Tax Rate on Income Before Income Taxes

The items comprising the differences between the U.S. federal statutory income tax rate and the Company’s effective tax rate on income before income taxes for the years ended December 31 are summarized in the tables below (dollars in thousands).


	2025
U.S. federal statutory tax rate	$	203,305	21.0	%
U.S. federal:
Goodwill impairment	23,560		2.4
Global intangible low-taxed income, net of foreign tax credits	10,865		1.1
Other cross border tax laws	6,372		0.7
Nontaxable or nondeductible items	(152)		—
Tax credits	(4,000)		(0.4)
Change in the valuation allowance	3,050		0.3
Other	(15,099)		(1.6)
State and local income tax, net of federal (national) income tax effect (1)	26,174		2.7
Foreign tax effects:
Ireland
Statutory rate difference between Ireland and United States	(19,967)		(2.1)
Other	(757)		(0.1)
Malta
Statutory rate difference between Malta and United States	(35,315)		(3.6)
Other	(635)		—
Other foreign jurisdictions	34,961		3.6
Changes in unrecognized tax benefits	6,525		0.7
Effective tax rate	$	238,887	24.7	%

(1)State and local income taxes in California, Florida, New York, and Virginia make up the majority (greater than 50 percent) of the tax effects in this category.


	2024		2023
Statutory tax rate	21.0	%	21.0	%
State income taxes, net of federal benefit	2.2		2.1
Effect of non-U.S. operations	(3.0)		(0.4)
Intercompany sale of intellectual property	(11.8)		—
Net activity in unrecognized tax benefits	2.0		1.3
Stock-based compensation expense	(3.3)		(3.1)
Limitation on executive compensation	2.4		2.3
Global intangible low-taxed income, net of foreign tax credits	1.1		1.2
Foreign-derived intangible income	—		(0.3)
Change in the valuation allowance	(0.1)		(1.2)
Other items, net	(0.9)		0.2
Effective tax rate	9.6	%	23.1	%

Schedule of Reconciliation of Beginning and Ending Unrecognized Tax Benefits

The table below is a reconciliation of the beginning and ending amounts of gross unrecognized tax benefits, excluding interest and penalties, for the years ended December 31 (in thousands).


	2025		2024		2023
Beginning balance	$	257,533	$	148,390	$	137,227
Additions based on tax positions related to the current year	41,465		116,373		22,822
Reductions based on tax positions related to current year	—		—		—
Additions for tax positions of prior years	4,888		7,925		4,361
Reductions for tax positions of prior years	(130)		(888)		(14)
Reductions for expiration of statutes	(7,911)		(10,573)		(15,625)
Settlements	—		—		(441)
Change in foreign currency exchange rates	5,737		(3,694)		60
Ending balance	$	301,582	$	257,533	$	148,390

Schedule of Income Taxes Paid, Net of Refunds

The following table summarizes income taxes paid, net of refunds received, for the year ended December 31 (in thousands).


	2025
US federal	$	95,586
US state and local	28,595
Foreign
United Kingdom	14,157
Other	71,219
Total Foreign	85,376
Total income taxes, net of refunds received	$	209,557

Debt - Narrative (Details) - USD ($)			12 Months Ended
Debt - Narrative (Details) - USD ($)	Mar. 26, 2024	Sep. 28, 2020	Dec. 31, 2025	Nov. 20, 2025	Dec. 31, 2024	Jun. 18, 2021	Jun. 22, 2020
Senior Notes
Debt Instrument [Line Items]
Carrying Amount				$ 799,900,000
2024 Credit Agreement \| Senior Notes
Debt Instrument [Line Items]
Carrying Amount				274,400,000
2031 Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount				$ 350,000,000.0
Debt instrument, fixed interest rate			4.95%	4.95%	4.95%
Debt instrument, issue price, percent				99.97%
2035 Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount				$ 450,000,000.0
Debt instrument, fixed interest rate			5.60%	5.60%	5.60%
Debt instrument, issue price, percent				99.992%
2029 Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount						$ 600,000,000
Debt instrument, fixed interest rate			3.63%		3.63%	3.625%
Debt instrument, issue price, percent						100.00%
2030 Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 800,000,000
Debt instrument, fixed interest rate		3.75%	3.75%		3.75%
Debt instrument, issue price, percent		100.00%
Percentage of principal amount redeemed		40.00%
2028 Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount							$ 800,000,000
Debt instrument, fixed interest rate			4.50%		4.50%		4.50%
Debt instrument, issue price, percent							100.00%
2020 Credit Agreement \| Variable Rate Component One
Debt Instrument [Line Items]
Additional interest above base rate		0.50%
Revolving Credit Facility \| 2024 Credit Agreement \| Unsecured Debt
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,000,000,000
Debt instrument term	5 years
Line of credit facility, additional borrowing capacity	$ 750,000,000
Additional interest above base rate			1.35%
Contractual annualized interest rate			5.35%
Debt instrument, fixed interest rate			4.00%
Revolving Credit Facility \| 2024 Credit Agreement \| Unsecured Debt \| Minimum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.125%
Revolving Credit Facility \| 2024 Credit Agreement \| Unsecured Debt \| Maximum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.25%
Revolving Credit Facility \| 2024 Credit Agreement \| Unsecured Debt \| Variable Rate Component One
Debt Instrument [Line Items]
Additional interest above base rate			0.10%
Revolving Credit Facility \| 2024 Credit Agreement \| Unsecured Debt \| Variable Rate Component Two \| Minimum
Debt Instrument [Line Items]
Additional interest above base rate	1.125%
Revolving Credit Facility \| 2024 Credit Agreement \| Unsecured Debt \| Variable Rate Component Two \| Maximum
Debt Instrument [Line Items]
Additional interest above base rate	1.75%
Letter of Credit \| 2024 Credit Agreement \| Unsecured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 75,000,000

Income Taxes - Differences Between U.S. Federal Statutory Income Tax Rate and Effective Tax Rate on Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
U.S. federal statutory tax rate	$ 203,305
Goodwill impairment	23,560
Global intangible low-taxed income, net of foreign tax credits	10,865
Other cross border tax laws	6,372
Nontaxable or nondeductible items	(152)
Tax credits	(4,000)
Change in the valuation allowance	3,050
Other	(15,099)
State and local income tax, net of federal (national) income tax effect	26,174
Changes in unrecognized tax benefits	6,525
Total tax expense	$ 238,887	$ 133,659	$ 264,663
Percent
U.S. federal statutory tax rate	21.00%	21.00%	21.00%
Goodwill impairment	2.40%
Global intangible low-taxed income, net of foreign tax credits	1.10%	1.10%	1.20%
Other cross border tax laws	0.70%
Change in the valuation allowance	0.00%
Tax credits	(0.40%)
Change in the valuation allowance	0.30%	(0.10%)	(1.20%)
Other	(1.60%)	(0.90%)	0.20%
State income taxes, net of federal benefit	2.70%	2.20%	2.10%
Statutory rate difference between Ireland and United States		(3.00%)	(0.40%)
Intercompany sale of intellectual property		(11.80%)	0.00%
Net activity in unrecognized tax benefits	0.70%	2.00%	1.30%
Stock-based compensation expense		(3.30%)	(3.10%)
Limitation on executive compensation		2.40%	2.30%
Foreign-derived intangible income		0.00%	(0.30%)
Effective tax rate	24.70%	9.60%	23.10%
IRELAND
Amount
Other	$ (757)
Statutory rate difference between Ireland and United States	$ (19,967)
Percent
Other	(0.10%)
Statutory rate difference between Ireland and United States	(2.10%)
MALTA
Amount
Other	$ (635)
Statutory rate difference between Ireland and United States	$ (35,315)
Percent
Other	0.00%
Statutory rate difference between Ireland and United States	(3.60%)
Other foreign jurisdictions
Amount
Statutory rate difference between Ireland and United States	$ 34,961
Percent
Statutory rate difference between Ireland and United States	3.60%

Stockholders' Equity - Summary of Transactions Relating to Common Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common Stock Outstanding Roll Forward [Roll Forward]
Treasury Stock, Common, Shares (in shares)	92,752,769	86,222,214
Payments for purchases of treasury stock	$ 1,991,147	$ 735,358	$ 606,188
Treasury Stock
Common Stock Outstanding Roll Forward [Roll Forward]
Treasury Stock, Common, Shares (in shares)	92,752,769	86,222,214	85,264,526	84,428,513
Issuances under stock plans (in shares)	(511,759)	(666,193)	(975,745)
Purchases for treasury (in shares)	7,042,314	1,623,881	1,811,758
Common Stock
Common Stock Outstanding Roll Forward [Roll Forward]
Beginning balance (in shares)	163,602,067	163,602,067	163,602,067
Issuances under stock plans (in shares)	0	0	0
Purchases for treasury (in shares)	0	0	0
Ending balance (in shares)	163,602,067	163,602,067	163,602,067

Computation of Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Schedule of Reconciliation of the Basic and Diluted Earnings Per Share Computations

The table below sets forth the calculation of basic and diluted income per share for the years ended December 31 (in thousands, except per share data).


	2025		2024		2023
Numerator:
Net income used for calculating basic and diluted income per share	$	729,231	$	1,253,715	$	882,466
Denominator:
Weighted average common shares used in the calculation of basic income per share	75,355		77,785		79,004
Dilutive effect of outstanding awards associated with stock-based compensation plans	250		553		676
Shares used in the calculation of diluted income per share	75,605		78,338		79,680
Income per share (1):
Basic	$	9.68	$	16.12	$	11.17
Diluted	$	9.65	$	16.00	$	11.08

(1)Both basic and diluted income per share for 2024 included a tax benefit of approximately $2.08 per share related to intercompany sales of certain intellectual property (see Note 12 — Income Taxes).

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The table below presents the number of outstanding awards associated with stock-based compensation plans that were not included in the computations of diluted income per share in the above table because the effect would have been anti-dilutive. During years with net income, the outstanding awards were anti-dilutive because their exercise prices were greater than the average market price per share of Common Stock during such year.


	Year Ended December 31,
	2025		2024		2023
Anti-dilutive outstanding awards associated with stock-based compensation plans (in millions)	0.3		0.1		0.1
Average market price per share of Common Stock during the year	$	358.33	$	475.66	$	351.31

Revenue and Related Matters - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Disaggregation of Revenue [Line Items]
Number of reportable segments \| segment	3
Revenue recognized previously attributable to deferred revenues	$ 2,400.0	$ 2,300.0	$ 2,000.0
Amortization of deferred sales commissions	$ 612.3	$ 574.3	$ 550.5
Minimum
Disaggregation of Revenue [Line Items]
Percentage of subscription contracts billable upon signing for twelve months of service	80.00%
Maximum
Disaggregation of Revenue [Line Items]
Percentage of subscription contracts billable upon signing for twelve months of service	85.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

Accounts Payable and Accrued and Other Liabilities

12 Months Ended

Dec. 31, 2025

Payables and Accruals [Abstract]

Accounts Payable and Accrued and Other Liabilities

The Company’s Accounts payable and accrued liabilities are summarized in the table below (in thousands).


	December 31,
	2025		2024
Accounts payable	$	49,778	$	55,793
Payroll and employee benefits payable	284,238		247,043

Bonus payable	298,295		291,484
Commissions payable	179,416		184,861
Income tax payable	51,256		38,690
VAT payable	76,926		64,501
Current portion of operating lease liabilities	96,076		100,312
Other accrued liabilities	200,548		223,405
Total accounts payable and accrued liabilities	$	1,236,533	$	1,206,089

The Company’s Other liabilities are summarized in the table below (in thousands).


	December 31,
	2025		2024
Non-current deferred revenues	$	31,569	$	27,389
Long-term taxes payable	149,765		122,126
Benefit plan-related liabilities	215,286		183,720
Non-current deferred tax liabilities	29,314		48,742
Other	20,592		24,815
Total other liabilities	$	446,526	$	406,792

Stock-Based Compensation - Stock-based Compensation Expense by Award Type and Expense Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 155.9	$ 154.8	$ 129.8
Cost of services and product development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	62.8	61.8	53.3
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	93.1	93.0	76.5
Stock appreciation rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	13.2	13.5	10.5
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	141.8	140.2	118.2
Common stock equivalents
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	0.9	1.1	1.1
Retirement Eligible Employees Equity Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 68.7	$ 71.4	$ 55.5

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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-Topic 718
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-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 26: http://www.xbrl.org/2003/role/disclosureRef
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Reference 27: http://www.xbrl.org/2003/role/disclosureRef
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Reference 28: http://www.xbrl.org/2003/role/disclosureRef
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Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Stockholders' Equity

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Common stock. Holders of Gartner’s common stock, par value $0.0005 per share, are entitled to one vote per share on all matters to be voted by stockholders. The Company does not currently pay cash dividends on its common stock. Also, the 2024 Credit Agreement contains a negative covenant that may limit the Company’s ability to pay dividends. The table below summarizes transactions relating to the Company’s common stock for the three years ended December 31, 2025.


	Issued Shares	Treasury Stock Shares
Balance at December 31, 2022	163,602,067	84,428,513
Issuances under stock plans	—	(975,745)
Purchases for treasury (1)	—	1,811,758
Balance at December 31, 2023	163,602,067	85,264,526
Issuances under stock plans	—	(666,193)
Purchases for treasury (1)	—	1,623,881
Balance at December 31, 2024	163,602,067	86,222,214
Issuances under stock plans	—	(511,759)
Purchases for treasury (1)	—	7,042,314
Balance at December 31, 2025	163,602,067	92,752,769

(1)The Company used a total of $2.0 billion, $0.7 billion and $0.6 billion in cash for share repurchases during 2025, 2024 and 2023, respectively.

Share repurchase authorization. In 2015, the Company’s Board of Directors (the “Board”) authorized a share repurchase program to repurchase up to $1.2 billion of the Company’s common stock. From February 2021 to September 2025, the Board authorized incremental share repurchases of up to an aggregate additional $5.8 billion of the Company’s common stock. $0.7 billion remained available as of December 31, 2025. The Board also authorized incremental share repurchases of up to an additional $500 million in January 2026. The Company may repurchase its common stock from time-to-time in amounts, at prices and in the manner that the Company deems appropriate, subject to the availability of stock, prevailing market conditions, the trading price of the stock, the Company’s financial performance and other conditions. Repurchases may be made through open market purchases (which may include repurchase plans designed to comply with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended), accelerated share repurchases, private transactions or other transactions and will be funded by cash on hand and borrowings. Repurchases may also be made from time-to-time in connection with the settlement of the Company’s stock-based compensation awards.

Accumulated Other Comprehensive Income (Loss), net (“AOCI/L”)

The tables below provide information about the changes in AOCI/L by component and the related amounts reclassified out of AOCI/L to income during the years indicated (net of tax, in thousands) (1).

Year Ended December 31, 2025


	Interest Rate Swaps		Defined Benefit Pension Plans		Foreign Currency Translation Adjustments		Total
Balance - December 31, 2024	$	(9,800)	$	(5,214)	$	(73,319)	$	(88,333)
Other comprehensive income (loss) activity during the year:
Change in AOCI/L before reclassifications to income	—		(930)		38,248		37,318
Reclassifications from AOCI/L to income (2), (3)	9,800		200		—		10,000
Other comprehensive income (loss), net for the year	9,800		(730)		38,248		47,318
Balance - December 31, 2025	$	—	$	(5,944)	$	(35,071)	$	(41,015)

Year Ended December 31, 2024


	Interest Rate Swaps		Defined Benefit Pension Plans		Foreign Currency Translation Adjustments		Total
Balance - December 31, 2023	$	(24,162)	$	(5,731)	$	(46,438)	$	(76,331)
Other comprehensive income (loss) activity during the year:
Change in AOCI/L before reclassifications to income	—		315		(26,881)		(26,566)
Reclassifications from AOCI/L to income (2), (3)	14,362		202		—		14,564
Other comprehensive income (loss), net for the year	14,362		517		(26,881)		(12,002)
Balance - December 31, 2024	$	(9,800)	$	(5,214)	$	(73,319)	$	(88,333)

(1)Amounts in parentheses represent debits (deferred losses).

(2)$13.2 million and $19.1 million of the reclassifications related to interest rate swaps (cash flow hedges) were recorded in Interest expense for the year ended December 31, 2025 and 2024, respectively. See Note 6 — Debt and Note 13 — Derivatives and Hedging for information regarding the cash flow hedges.

(3)The reclassifications related to defined benefit pension plans were primarily recorded in Selling, general and administrative expense, net of tax effect. See Note 15 — Employee Benefits for information regarding the Company’s defined benefit pension plans.

- Definition

The entire disclosure for equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147480237/815-40-50-6

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Acquisition and Divestiture	12 Months Ended
Acquisition and Divestiture	Dec. 31, 2025
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Acquisition and Divestiture	Acquisition and Divestiture Acquisition Year Ended December 31, 2023 In September 2023, the Company acquired 100% of a formerly independent sales agent of Gartner Insights products in the Czech Republic for an aggregate purchase price of $7.9 million, including cash acquired and deferred consideration. During the year ended December 31, 2024, the Company paid $2.0 million of deferred consideration. Divestiture In February 2023, the Company completed the sale of a non-core business, TalentNeuron, for approximately $161.1 million after consideration of post-close adjustments. The Company recorded a pre-tax gain of $135.4 million on the sale of TalentNeuron, which is included in Gain from sale of divested operation in the Consolidated Statement of Operations for the year ended December 31, 2023. TalentNeuron was included in the Company’s Insights segment. Acquisition and Integration Charges The Company recognized $1.0 million and $9.6 million of Acquisition and integration charges during 2024 and 2023, respectively. Acquisition and integration charges reflect additional costs and expenses resulting from the Company’s acquisitions and divestitures and include, among other items, professional fees and personnel related expenses.

Employee Benefits

12 Months Ended

Dec. 31, 2025

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Employee Benefits

Defined contribution plans. The Company has savings and investment plans (the “401(k) Plans”) covering substantially all U.S. employees. Company contributions are based on the level of employee contributions, up to a maximum of 4% of an employee’s eligible salary, subject to an annual maximum. For 2025, the maximum Company match was $7,200. Amounts expensed in connection with the 401(k) Plans totaled $58.4 million, $57.5 million and $56.0 million in 2025, 2024 and 2023, respectively.

Deferred compensation plans. The Company has supplemental deferred compensation plans for the benefit of certain highly compensated officers, managers and other key employees. The plans’ investment assets are recorded at fair value in Other assets on the Consolidated Balance Sheets. The value of those assets was $175.1 million and $146.8 million at December 31, 2025 and 2024, respectively (see Note 14 — Fair Value Disclosures for fair value information). The related deferred compensation plan liabilities, which were $178.3 million and $148.6 million at December 31, 2025 and 2024, respectively, are carried at fair value and are adjusted with a corresponding charge or credit to compensation expense to reflect the fair value of the amount owed to the employees. Deferred compensation plan liabilities are recorded in Other liabilities on the Consolidated Balance Sheets. Compensation expense recognized for all of the Company’s deferred compensation plans was $1.3 million, $2.3 million and $2.8 million in 2025, 2024 and 2023, respectively.

Defined benefit pension plans. The Company has defined benefit pension plans at several of its international locations. Benefits earned and paid under those plans are generally based on years of service and level of employee compensation. The Company’s vested benefit obligation is the actuarial present value of the vested benefits to which an employee is entitled based on the employee’s expected date of separation or retirement. The Company’s defined benefit pension plans are accounted for in accordance with FASB ASC Topics 715 and 960. The table below presents the components of the Company’s defined benefit pension plan expense for the years ended December 31 (in thousands). The components of pension expense, other than service cost, are recorded in Other income, net in the Consolidated Statements of Operations.


	2025		2024		2023
Service cost	$	7,255	$	6,765	$	5,363
Interest cost	3,101		2,520		2,173
Expected return on plan assets	(1,509)		(1,213)		(1,132)
Recognition of actuarial loss	262		262		171

Other	—		—		(638)
Total defined benefit pension plan expense	$	9,109	$	8,334	$	5,937

The table below presents the key assumptions used in the computation of pension expense for the years ended December 31.


	2025		2024		2023
Weighted average discount rate (1)	3.94	%	3.48	%	3.67	%
Expected return on plan assets	3.79	%	3.59	%	3.90	%
Average compensation increase	3.51	%	3.29	%	3.37	%
Cash balance interest credit rate	3.50	%	3.10	%	3.60	%

(1)Discount rates are typically determined by using the yields on long-term corporate or government bonds in the relevant country with a duration consistent with the expected term of the underlying pension obligations.

The table below provides information regarding changes in the projected benefit obligation of the Company’s defined benefit pension plans for the years ended December 31 (in thousands).


	2025		2024		2023
Projected benefit obligation at beginning of year	$	69,710	$	68,403	$	55,311
Service cost	7,255		6,765		5,363
Interest cost	3,101		2,520		2,173
Actuarial (gain) loss due to assumption changes and plan experience (1)	(707)		(772)		2,527

Benefits payments (2)	(4,180)		(2,838)		(1,974)


Acquisition/Business Combination/Divestiture	—		—		(268)
Other	1,045		—		4,628
Foreign currency impact	5,571		(4,368)		643
Projected benefit obligation at end of year (3)	$	81,795	$	69,710	$	68,403

The table below presents the key assumptions used in determining the projected benefit obligations at December 31.


	2025		2024		2023
Weighted average discount rate (4)	4.55	%	3.94	%	3.48	%
Average compensation increase	3.40	%	3.51	%	3.29	%
Cash balance interest credit rate	4.40	%	3.50	%	3.10	%

(1)The actuarial (gain) losses were primarily due to changes in the weighted average discount rate assumption.

(2)The Company projects benefit payments will be made in future years directly to plan participants as follows: $4.7 million in 2026; $5.1 million in 2027; $6.3 million in 2028; $6.7 million in 2029; $7.2 million in 2030; and $40.3 million in total in the five years thereafter.

(3)Measured as of December 31.

(4)Discount rates are typically determined by using the yields on long-term corporate or government bonds in the relevant country with a duration consistent with the expected term of the underlying pension obligations.

The tables below provide information regarding the funded status of the Company’s defined benefit pension plans and the related amounts recorded in the Consolidated Balance Sheets as of December 31 (in thousands).


Funded status of the plans	2025		2024		2023
Projected benefit obligation	$	81,795	$	69,710	$	68,403
Pension plan assets at fair value (1)	(44,835)		(34,931)		(33,034)
Funded status – shortfall (2)	$	36,960	$	34,779	$	35,369

Accumulated benefit obligation	$	72,432	$	62,481	$	61,713

Amounts recorded in the Consolidated Balance Sheets for the plans
Other liabilities – accrued pension obligation (2)	$	36,960	$	34,779	$	35,369
Stockholders’ equity – deferred actuarial loss (3)	$	(5,944)	$	(5,214)	$	(5,731)

(1)The pension plan assets are held by third-party trustees and are invested in a diversified portfolio of equities, high-quality government and corporate bonds, and other investments. The assets are primarily valued based on Level 1 and Level 2 inputs under the fair value hierarchy in ASC 820, with the majority of the invested assets considered to be of low-to-medium investment risk. The Company projects a future long-term rate of return on these plan assets of 4.63%, which it believes is reasonable based on the composition of the assets and both current and projected market conditions. Additional information regarding pension plan asset activity is provided below.

(2)Funded status – shortfall represents the amount of the projected benefit obligation that the Company has not funded with a third-party trustee. These liabilities of the Company are recorded in Other liabilities on the Consolidated Balance Sheets. The level of future contributions by the Company will vary and is dependent on a number of factors including investment returns, interest rate fluctuations, plan demographics, funding regulations and the results of the final actuarial valuation.

(3)The deferred actuarial loss as of December 31, 2025 is recorded in AOCI/L and will be reclassified out of AOCI/L and recognized as pension expense over approximately 7 years, subject to certain limitations set forth in FASB ASC Topic 715.

The table below provides a rollforward of the Company’s defined benefit pension plans assets for the years ended December 31 (in thousands).


	2025		2024		2023
Pension plan assets at the beginning of the year	$	34,931	$	33,034	$	27,798
Company contributions	7,920		6,170		5,022
Benefit payments	(4,180)		(2,838)		(1,974)
Actual return on plan assets	1,456		1,021		1,516


Foreign currency impact	4,708		(2,456)		672
Pension plan assets at the end of the year	$	44,835	$	34,931	$	33,034

The Company also has a reinsurance asset arrangement with a large international insurance company that is intended to fund benefit payments for one of its plans. The reinsurance asset is not a pension plan asset but is an asset of the Company. At December 31, 2025 and 2024, the reinsurance asset was recorded at its cash surrender value of $10.2 million and $8.8 million, respectively, and recorded in Other assets on the Consolidated Balance Sheets. The Company believes that cash surrender value approximates fair value and is equivalent to a Level 2 input under the FASB’s fair value hierarchy in ASC 820.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (o)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (p)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480266/715-60-50-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480126/715-20-S99-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480794/715-70-50-1

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-URI https://asc.fasb.org/715/tableOfContent

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Section 50
-Paragraph 1
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (r)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (r)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

Income Taxes - Income Taxes Paid, Net of Refunds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items]
US federal	$ 95,586
US state and local	28,595
Total Foreign	85,376
Total income taxes, net of refunds received	209,557	$ 312,895	$ 306,682
United Kingdom
Effective Income Tax Rate Reconciliation [Line Items]
Total Foreign	14,157
Other
Effective Income Tax Rate Reconciliation [Line Items]
Total Foreign	$ 71,219

Other Assets - Composition of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Benefit plan-related assets	$ 185,370	$ 155,998
Non-current deferred tax assets	245,434	262,757
Other	82,974	79,104
Total other assets	$ 513,778	$ 497,859

- Definition

Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

+ References + Details

Revenue and Related Matters (Tables)

12 Months Ended

Dec. 31, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue by Reportable Segment

Disaggregated revenue by reportable segment is presented in the tables below for the years indicated (in thousands).

By Primary Geographic Market (1)

Year Ended December 31, 2025


Primary Geographic Market	Insights		Conferences		Consulting		Other		Total

United States and Canada	$	3,117,883	$	381,544	$	342,287	$	190,887	$	4,032,601
Europe, Middle East and Africa	1,323,266		194,995		148,946		26,525		1,693,732
Other International	631,421		68,204		61,266		10,002		770,893
Total revenues	$	5,072,570	$	644,743	$	552,499	$	227,414	$	6,497,226

Year Ended December 31, 2024


Primary Geographic Market	Insights		Conferences		Consulting		Other		Total

United States and Canada	$	3,077,133	$	354,011	$	343,840	$	242,746	$	4,017,730
Europe, Middle East and Africa	1,169,314		165,306		142,849		40,346		1,517,815
Other International	582,604		63,907		71,848		13,507		731,866
Total revenues	$	4,829,051	$	583,224	$	558,537	$	296,599	$	6,267,411

Year Ended December 31, 2023


Primary Geographic Market	Insights		Conferences		Consulting		Other		Total

United States and Canada	$	2,973,062	$	317,531	$	317,645	$	302,804	$	3,911,042
Europe, Middle East and Africa	1,009,500		140,640		130,471		51,459		1,332,070
Other International	533,473		46,993		66,630		16,748		663,844
Total revenues	$	4,516,035	$	505,164	$	514,746	$	371,011	$	5,906,956

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

Schedule of Disaggregation of Revenue

By Timing of Revenue Recognition

Year Ended December 31, 2025


Timing of Revenue Recognition	Insights		Conferences		Consulting		Other		Total

Transferred over time (1)	$	5,062,390	$	—	$	398,551	$	1,463	$	5,462,404
Transferred at a point in time (2)	10,180		644,743		153,948		225,951		1,034,822
Total revenues	$	5,072,570	$	644,743	$	552,499	$	227,414	$	6,497,226

Year Ended December 31, 2024


Timing of Revenue Recognition	Insights		Conferences		Consulting		Other		Total

Transferred over time (1)	$	4,818,254	$	—	$	420,160	$	2,689	$	5,241,103
Transferred at a point in time (2)	10,797		583,224		138,377		293,910		1,026,308
Total revenues	$	4,829,051	$	583,224	$	558,537	$	296,599	$	6,267,411

Year Ended December 31, 2023


Timing of Revenue Recognition	Insights		Conferences		Consulting		Other		Total

Transferred over time (1)	$	4,502,783	$	—	400,171		3,838		$	4,906,792
Transferred at a point in time (2)	13,252		505,164		114,575		367,173		1,000,164
Total revenues	$	4,516,035	$	505,164	$	514,746	$	371,011	$	5,906,956

(1)Insights revenues were recognized in connection with performance obligations that were satisfied over time using a time-elapsed output method to measure progress. Consulting revenues were recognized over time using labor hours as an input measurement basis.

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


	December 31,
	2025		2024
Assets:
Fees receivable, gross (1)	$	1,689,522	$	1,704,725
Contract assets recorded in Prepaid expenses and other current assets (2)	$	40,534	$	31,056
Contract liabilities:
Deferred revenues (current liability) (3)	$	2,810,056	$	2,762,927
Non-current deferred revenues recorded in Other liabilities (3)	31,569		27,389
Total contract liabilities	$	2,841,625	$	2,790,316

(1)Fees receivable represent an unconditional right of 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 restriction.

(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).

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Leases [Abstract]
Accounts payable and accrued liabilities	$ 96,076	$ 100,312
Operating lease liabilities	270,200	339,779
Total operating lease liabilities per the Consolidated Balance Sheet	$ 366,276	$ 440,091
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accounts payable and accrued liabilities	Accounts payable and accrued liabilities

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues:
Total revenues	$ 6,497,226	$ 6,267,411	$ 5,906,956
Costs and expenses:
Cost of services and product development	2,053,575	2,023,022	1,903,240
Selling, general and administrative	3,067,631	2,884,814	2,701,542
Depreciation	118,015	112,083	98,645
Amortization of intangibles	82,294	90,232	92,458
Acquisition and integration charges	0	973	9,587
Goodwill impairment	150,000	0	0
Gain from sale of divested operation	0	0	(135,410)
Total costs and expenses	5,471,515	5,111,124	4,670,062
Operating income	1,025,711	1,156,287	1,236,894
Interest income	64,716	61,558	38,526
Interest expense	(125,277)	(131,046)	(132,772)
Gain on event cancellation insurance claims	0	300,000	3,077
Other income, net	2,968	575	1,404
Income before income taxes	968,118	1,387,374	1,147,129
Provision for income taxes	238,887	133,659	264,663
Net income	$ 729,231	$ 1,253,715	$ 882,466
Net income per share:
Basic (in dollars per share)	$ 9.68	$ 16.12	$ 11.17
Diluted (in dollars per share)	$ 9.65	$ 16.00	$ 11.08
Weighted average shares outstanding:
Basic (in shares)	75,355	77,785	79,004
Diluted (in shares)	75,605	78,338	79,680
Insights
Revenues:
Total revenues	$ 5,072,570	$ 4,829,051	$ 4,516,035
Conferences
Revenues:
Total revenues	644,743	583,224	505,164
Consulting
Revenues:
Total revenues	552,499	558,537	514,746
Other
Revenues:
Total revenues	$ 227,414	$ 296,599	$ 371,011

Employee Benefits - Assumptions Used in Computation of Net Periodic Pension Expense (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Weighted-average discount rate	3.94%	3.48%	3.67%
Expected return on plan assets	3.79%	3.59%	3.90%
Average compensation increase	3.51%	3.29%	3.37%
Cash balance interest credit rate	3.50%	3.10%	3.60%

Business and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Cash and Cash Equivalents

Below is a table presenting the beginning-of-period and end-of-period cash amounts from the Company’s Consolidated Balance Sheets and the total cash amounts presented in the Consolidated Statements of Cash Flows (in thousands).


	December 31,
	2025		2024		2023		2022
Cash and cash equivalents	$	1,722,521	$	1,933,147	$	1,318,999	$	697,999
Restricted cash classified in (1):
Prepaid expenses and other current assets	—		—		600		—
Other assets	—		—		—		600
Cash and cash equivalents and restricted cash per the Consolidated Statements of Cash Flows	$	1,722,521	$	1,933,147	$	1,319,599	$	698,599

(1)Restricted cash consisted of an escrow account established in connection with one of the Company’s business acquisitions. Generally, such cash is restricted to use due to provisions contained in the underlying acquisition agreement. During the year ended December 31, 2024, the Company paid $0.6 million of restricted cash for deferred consideration related to a 2022 acquisition.

Restrictions on Cash and Cash Equivalents


	December 31,
	2025		2024		2023		2022
Cash and cash equivalents	$	1,722,521	$	1,933,147	$	1,318,999	$	697,999
Restricted cash classified in (1):
Prepaid expenses and other current assets	—		—		600		—
Other assets	—		—		—		600
Cash and cash equivalents and restricted cash per the Consolidated Statements of Cash Flows	$	1,722,521	$	1,933,147	$	1,319,599	$	698,599

Schedule of Property, Plant and Equipment

Property, equipment and leasehold improvements, net are presented in the table below (in thousands).


	Useful Life	December 31,
Category	(Years)	2025		2024
Computer equipment and software	2 - 7	$	345,968	$	387,362
Furniture and equipment	3 - 8	72,462		71,026
Leasehold improvements	2 - 15	191,874		190,451
Total cost		610,304		648,839
Less — accumulated depreciation and amortization		(396,121)		(405,871)
Property, equipment and leasehold improvements, net		$	214,183	$	242,968

Segment Information - Narrative (Details)	12 Months Ended
Segment Information - Narrative (Details)	Dec. 31, 2025 USD ($) segment
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	3
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues \| $	$ 0

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
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-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense by Award Type

The tables below summarize the Company’s stock-based compensation expense by award type and expense category line item during the years ended December 31 (in millions).


Award type	2025		2024		2023
Stock appreciation rights	$	13.2	$	13.5	$	10.5
Restricted stock units (1)	141.8		140.2		118.2
Common stock equivalents	0.9		1.1		1.1
Total (1)	$	155.9	$	154.8	$	129.8

Schedule of Stock-based Compensation Expense by Expense Category


Expense category line item	2025		2024		2023
Cost of services and product development	$	62.8	$	61.8	$	53.3
Selling, general and administrative	93.1		93.0		76.5
Total (1)	$	155.9	$	154.8	$	129.8

(1)Includes charges of $68.7 million, $71.4 million and $55.5 million during 2025, 2024 and 2023, respectively, for awards to retirement-eligible employees. Those awards vest on an accelerated basis.

Schedule of the Changes in SARS, RSUs, and CSEs Outstanding

The table below summarizes changes in SARs outstanding during the year ended December 31, 2025.


	Units of SARs (in millions)	Per Share Weighted Average Exercise Price		Per Share Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Term (Years)
Outstanding at December 31, 2024	0.4	$	293.38	$	96.17	4.21
Granted	0.1	534.45		167.91		6.10

Exercised	(0.1)	163.71		39.99		n/a
Outstanding at December 31, 2025 (1) (2)	0.4	$	346.07	$	113.88	3.86
Vested and exercisable at December 31, 2025 (2)	0.2	$	264.27	$	83.00	2.88

n/a = not applicable

(1)As of December 31, 2025, 0.2 million of the total SARs outstanding were unvested. The Company expects that substantially all of those unvested awards will vest in future periods.

(2)As of December 31, 2025, the total SARs outstanding had an intrinsic value of $8.5 million. On such date, SARs vested and exercisable had an intrinsic value of $8.5 million.

The table below summarizes the changes in RSUs outstanding during the year ended December 31, 2025.


	Units of RSUs (in millions)	Per Share Weighted Average Grant Date Fair Value
Outstanding at December 31, 2024	0.9	$	352.89
Granted (1)	0.3	530.62
Vested and released	(0.4)	316.46

Outstanding at December 31, 2025 (2) (3)	0.8	$	433.83

(1)The 0.3 million of RSUs granted during 2025 consisted of 0.1 million of performance-based RSUs awarded to executives and 0.2 million of service-based RSUs awarded to non-executive employees and non-management board members. The performance-based awards include RSUs in final adjustments of 2024 grants and approximately 0.1 million of RSUs representing the target amount of the grant for 2025 that is tied to Gartner’s contract value for such year. The number of performance-based RSUs for 2025 that holders could receive ranges from 0% to 200% of the target amount based on the extent to which the corresponding performance goals have been achieved and subject to certain other conditions. Any adjustments in the number of performance-based RSUs under the 2025 grant will be made in 2026.

(2)The Company expects that substantially all of the RSUs outstanding will vest in future periods.

(3)As of December 31, 2025, the weighted average remaining contractual term of the RSUs outstanding was approximately 1.1 years.

The table below summarizes the changes in CSEs outstanding during the year ended December 31, 2025.


	Units of CSEs	Per Share Weighted Average Grant Date Fair Value
Outstanding at December 31, 2024	107,049	$	38.48
Granted	2,969	305.66
Converted to shares of Common Stock upon grant and termination	(1,435)	369.68
Outstanding at December 31, 2025	108,583	$	41.41

Schedule of Fair Value Assumptions of SARS

The fair value of a SARs award is determined on the date of grant using the Black-Scholes-Merton valuation model with the following weighted average assumptions for the years ended December 31:


	2025		2024		2023
Expected dividend yield (1)	—	%	—	%	—	%
Expected stock price volatility (2)	29	%	36	%	35	%
Risk-free interest rate (3)	4.3	%	4.1	%	3.9	%
Expected life in years (4)	4.58		4.67		4.71

(1)The expected dividend yield assumption was based on both the Company’s historical and anticipated dividend payouts. Historically, the Company has not paid cash dividends on its Common Stock.

(2)The determination of expected stock price volatility was based on both historical Common Stock prices and implied volatility from publicly traded options in the Common Stock.

(3)The risk-free interest rate was based on the yield of a U.S. Treasury security with a maturity similar to the expected life of the award.

(4)The expected life represents the Company’s estimate of the weighted average period of time the SARs are expected to be outstanding (that is, the period between the service inception date and the expected exercise date).

Fair Value Disclosures - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment	$ 150,000	$ 0	$ 0
Loss on impairment of lease related assets, net	4,766	10,909	20,368
Digital Markets Reporting Unit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment	150,000
Selling, general and administrative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss on impairment of lease related assets, net	$ 4,800	$ 10,900	$ 20,400

- Definition

Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References + Details

Stock-Based Compensation - Schedule of Changes in CSEs Outstanding (Details) - CSEs	12 Months Ended
	Dec. 31, 2025 $ / shares shares
Units of CSEs
Outstanding, Beginning Balance (in shares) \| shares	107,049
Granted (in shares) \| shares	2,969
Converted to shares of Common Stock upon grant and termination (in shares) \| shares	(1,435)
Outstanding, Ending Balance (in shares) \| shares	108,583
Per Share Weighted Average Grant Date Fair Value
Outstanding, Beginning Balance (in dollars per share) \| $ / shares	$ 38.48
Granted (in dollars per share) \| $ / shares	305.66
Converted to shares of Common Stock upon grant and termination (in dollars per share) \| $ / shares	369.68
Outstanding, Ending Balance (in dollars per share) \| $ / shares	$ 41.41

Business and Significant Accounting Policies - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) enterprise country segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Business and Significant Accounting Policies [Line Items]
Number of enterprises served (nearly) \| enterprise	13,000
Number of countries in which entity operates \| country	90
Number of reportable segments \| segment	3
Loss on impairment of lease related assets, net	$ 4,766	$ 10,909	$ 20,368
Depreciation expense	118,015	112,083	98,645
Net capitalized development costs for internal use software	101,800	122,000
Amortization of capitalized internal software development costs	68,400	60,100	47,800
Goodwill impairment	150,000	0	0
Foreign currency transaction gains/ (losses)	6,000	(6,900)	(6,000)
Derivative instruments, gain (loss) recognized in income, net	(16,116)	(12,676)	(14,226)
Proceeds from event cancellation insurance claims		300,000	3,100
Digital Markets Reporting Unit
Business and Significant Accounting Policies [Line Items]
Goodwill impairment	150,000
Foreign currency exchange contracts
Business and Significant Accounting Policies [Line Items]
Derivative instruments, gain (loss) recognized in income, net	(3,400)	2,500	1,900
Selling, general and administrative
Business and Significant Accounting Policies [Line Items]
Loss on impairment of lease related assets, net	$ 4,800	$ 10,900	$ 20,400

Stock-Based Compensation - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	5,200,000
Common stock, par value (in dollars per share)	$ 0.0005	$ 0.0005
Total share-based compensation cost not yet recognized	$ 155,500,000
Remaining weighted average service period	1 year 7 months 6 days
Proceeds from employee stock purchase plan	$ 32,450,000	$ 28,187,000	$ 25,107,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan, stock purchases as a percentage of employee compensation, maximum	10.00%
Maximum share value authorized for purchase under employee stock purchase plan	$ 23,750
Exercisable price percentage of closing price of another class of stock	95.00%
Maximum number of shares that may be purchased by eligible participants (in shares)	3,000,000.0
Proceeds from employee stock purchase plan	$ 32,500,000	$ 28,200,000	$ 25,100,000
Stock appreciation rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining weighted average service period	6 years 1 month 6 days
Award vesting period	4 years
Award expiry period from date of grant	7 years
Total compensation cost not yet recognized, period for recognition	4 years
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares per vested award (in shares)	1
Restricted stock units \| Service-based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Restricted stock units \| Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
CSEs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares per vested award (in shares)	1
Base fee percentage	50.00%

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating activities:
Net income	$ 729,231	$ 1,253,715	$ 882,466
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	200,309	202,315	191,103
Stock-based compensation expense	155,877	154,784	129,841
Deferred taxes	828	(162,081)	(64,173)
Goodwill impairment	150,000	0	0
Gain from sale of divested operation	0	0	(135,410)
Loss on impairment of lease related assets, net	4,766	10,909	20,368
Reduction in the carrying amount of operating lease right-of-use assets	64,196	65,742	70,207
Amortization and write-off of deferred financing fees and unamortized discounts	4,288	4,591	4,689
Gain on de-designated swaps	(489)	(3,870)	(3,925)
Changes in assets and liabilities, net of acquisitions and divestitures:
Fees receivable, net	38,027	(137,768)	(24,662)
Deferred commissions	25,250	(41,555)	(13,716)
Prepaid expenses and other current assets	1,760	(28,933)	(7,893)
Other assets	(30,939)	(43,503)	(34,528)
Deferred revenues	(41,944)	181,180	169,917
Accounts payable and accrued and other liabilities	(10,795)	29,396	(28,547)
Cash provided by operating activities	1,290,365	1,484,922	1,155,737
Investing activities:
Additions to property, equipment and leasehold improvements	(115,142)	(101,737)	(103,124)
Acquisitions - cash paid (net of cash acquired)	0	(2,000)	(3,800)
Proceeds from sale of divested operation	0	0	161,081
Cash (used in) provided by investing activities	(115,142)	(103,737)	54,157
Financing activities:
Proceeds from employee stock purchase plan	32,450	28,187	25,107
Proceeds from issuance of long-term debt, net of discounts	799,859	0	0
Payments for deferred financing fees	(6,480)	(2,972)	0
Proceeds from revolving credit facility	0	274,400	0
Payments on revolving credit facility	(274,400)	0	0
Payments on long-term debt	0	(274,400)	(7,800)
Purchases of treasury stock	(1,991,147)	(735,358)	(606,188)
Cash used in financing activities	(1,439,718)	(710,143)	(588,881)
Net (decrease) increase in cash and cash equivalents and restricted cash	(264,495)	671,042	621,013
Effects of exchange rates on cash and cash equivalents and restricted cash	53,869	(57,494)	(13)
Cash and cash equivalents and restricted cash, beginning of year	1,933,147	1,319,599	698,599
Cash and cash equivalents and restricted cash, end of year	1,722,521	1,933,147	1,319,599
Cash paid during the year for:
Interest	99,503	100,085	119,038
Income taxes, net of refunds received	$ 209,557	$ 312,895	$ 306,682

Goodwill and Intangible Assets - Estimated Future Amortization Expense By Year From Amortizable Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangibles	$ 82,294	$ 90,232	$ 92,458
Finite-Lived Intangible Assets, Estimated Future Amortization Expense
2026	80,193
2027	79,585
2028	78,114
2029	78,035
2030	20,376
Finite-lived intangible assets, net	$ 336,303	$ 409,689

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
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+ Details

Stock-Based Compensation

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

The Company grants stock-based compensation awards as an incentive for employees and directors to contribute to the Company’s long-term success. The Company currently awards stock-settled stock appreciation rights, service-based and performance-based restricted stock units, and common stock equivalents. As of December 31, 2025, the Company had 5.2 million shares of its common stock, par value $0.0005 per share, (the “Common Stock”) available for stock-based compensation awards under its Long-Term Incentive Plan as amended and restated in June 2023 (the “Plan”). Currently, the Company issues treasury shares upon the exercise, release or settlement of stock-based compensation awards.

Determining the appropriate fair value model and calculating the fair value of stock-based compensation awards requires the use of certain subjective assumptions, including the expected life of a stock-based compensation award and Common Stock price volatility. In addition, determining the appropriate periodic stock-based compensation expense requires management to estimate the likelihood of the achievement of certain performance targets. The assumptions used in calculating the fair values of stock-based compensation awards and the related periodic expense represent management’s best estimates, which involve inherent uncertainties and the application of judgment. As a result, if circumstances change and the Company deems it necessary in the future to modify the assumptions it made or to use different assumptions, or if the quantity and nature of the Company’s stock-based compensation awards changes, then the amount of expense may need to be adjusted and future stock-based compensation expense could be materially different from what has been recorded in the current year.

Stock-Based Compensation Expense

The tables below summarize the Company’s stock-based compensation expense by award type and expense category line item during the years ended December 31 (in millions).


Award type	2025		2024		2023
Stock appreciation rights	$	13.2	$	13.5	$	10.5
Restricted stock units (1)	141.8		140.2		118.2
Common stock equivalents	0.9		1.1		1.1
Total (1)	$	155.9	$	154.8	$	129.8


Expense category line item	2025		2024		2023
Cost of services and product development	$	62.8	$	61.8	$	53.3
Selling, general and administrative	93.1		93.0		76.5
Total (1)	$	155.9	$	154.8	$	129.8

(1)Includes charges of $68.7 million, $71.4 million and $55.5 million during 2025, 2024 and 2023, respectively, for awards to retirement-eligible employees. Those awards vest on an accelerated basis.

As of December 31, 2025, the Company had $155.5 million of total unrecognized stock-based compensation cost, which is expected to be expensed over the remaining weighted average service period of approximately 1.6 years.

Stock-Based Compensation Awards

The disclosures presented below provide information regarding the Company’s stock-based compensation awards, all of which have been classified as equity awards in accordance with FASB ASC Topic 505.

Stock Appreciation Rights

Stock-settled stock appreciation rights (“SARs”) permit the holder to participate in the appreciation of the value of the Common Stock. After the applicable vesting criteria have been satisfied, SARs are settled in shares of Common Stock upon exercise by the employee. SARs vest ratably over a four-year service period and expire seven years from the date of grant. The fair value of a SARs award is recognized as compensation expense on a straight-line basis over four years. SARs have only been awarded to the Company’s executive officers.

When SARs are exercised, the number of shares of Common Stock issued is calculated as follows: (1) the total proceeds from the exercise of the SARs award (calculated as the closing price of the Common Stock as reported on the New York Stock Exchange on the date of exercise less the exercise price of the SARs award, multiplied by the number of SARs exercised) is divided by (2) the closing price of the Common Stock on the date of exercise. Upon exercise, the Company withholds a portion of the shares of the Common Stock to satisfy statutory tax withholding requirements. SARs recipients do not have any stockholder rights until the shares of Common Stock are issued in respect of the award, which is subject to the prior satisfaction of the vesting and other criteria relating to such grants.

The table below summarizes changes in SARs outstanding during the year ended December 31, 2025.


	Units of SARs (in millions)	Per Share Weighted Average Exercise Price		Per Share Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Term (Years)
Outstanding at December 31, 2024	0.4	$	293.38	$	96.17	4.21
Granted	0.1	534.45		167.91		6.10

Exercised	(0.1)	163.71		39.99		n/a
Outstanding at December 31, 2025 (1) (2)	0.4	$	346.07	$	113.88	3.86
Vested and exercisable at December 31, 2025 (2)	0.2	$	264.27	$	83.00	2.88

n/a = not applicable

(1)As of December 31, 2025, 0.2 million of the total SARs outstanding were unvested. The Company expects that substantially all of those unvested awards will vest in future periods.

(2)As of December 31, 2025, the total SARs outstanding had an intrinsic value of $8.5 million. On such date, SARs vested and exercisable had an intrinsic value of $8.5 million.

The fair value of a SARs award is determined on the date of grant using the Black-Scholes-Merton valuation model with the following weighted average assumptions for the years ended December 31:


	2025		2024		2023
Expected dividend yield (1)	—	%	—	%	—	%
Expected stock price volatility (2)	29	%	36	%	35	%
Risk-free interest rate (3)	4.3	%	4.1	%	3.9	%
Expected life in years (4)	4.58		4.67		4.71

(1)The expected dividend yield assumption was based on both the Company’s historical and anticipated dividend payouts. Historically, the Company has not paid cash dividends on its Common Stock.

(2)The determination of expected stock price volatility was based on both historical Common Stock prices and implied volatility from publicly traded options in the Common Stock.

(3)The risk-free interest rate was based on the yield of a U.S. Treasury security with a maturity similar to the expected life of the award.

Restricted Stock Units

Restricted stock units (“RSUs”) give the awardee the right to receive shares of Common Stock when the vesting conditions are met and certain restrictions lapse. Each RSU that vests entitles the awardee to one share of Common Stock. RSU awardees do not have any of the rights of a Gartner stockholder, including voting rights and the right to receive dividends and distributions,

until the shares are released. The fair value of an RSU award is determined on the date of grant based on the closing price of the Common Stock as reported on the New York Stock Exchange on that date. Service-based RSUs vest ratably over four years and are expensed on a straight-line basis over the vesting period. Performance-based RSUs are subject to the satisfaction of both performance and service conditions, vest ratably over four years and are expensed on an accelerated basis over the vesting period.

The table below summarizes the changes in RSUs outstanding during the year ended December 31, 2025.


	Units of RSUs (in millions)	Per Share Weighted Average Grant Date Fair Value
Outstanding at December 31, 2024	0.9	$	352.89
Granted (1)	0.3	530.62
Vested and released	(0.4)	316.46

Outstanding at December 31, 2025 (2) (3)	0.8	$	433.83

(2)The Company expects that substantially all of the RSUs outstanding will vest in future periods.

(3)As of December 31, 2025, the weighted average remaining contractual term of the RSUs outstanding was approximately 1.1 years.

Common Stock Equivalents

Common stock equivalents (“CSEs”) are convertible into Common Stock. Each CSE entitles the holder to one share of Common Stock. Members of the Company’s Board of Directors receive their directors’ fees in CSEs unless they opt to receive up to 50% of those fees in cash. Generally, CSEs have no defined term and are converted into shares of Common Stock when service as a director terminates unless the director has elected an accelerated release. The fair value of a CSE award is determined on the date of grant based on the closing price of the Common Stock as reported on the New York Stock Exchange on that date. CSEs vest immediately and, as a result, they are recorded as expense on the date of grant.

The table below summarizes the changes in CSEs outstanding during the year ended December 31, 2025.


	Units of CSEs	Per Share Weighted Average Grant Date Fair Value
Outstanding at December 31, 2024	107,049	$	38.48
Granted	2,969	305.66
Converted to shares of Common Stock upon grant and termination	(1,435)	369.68
Outstanding at December 31, 2025	108,583	$	41.41

Employee Stock Purchase Plan

The Company has an employee stock purchase plan (the “ESP Plan”) wherein eligible employees are permitted to purchase shares of Common Stock through payroll deductions, which may not exceed 10% of an employee’s compensation, or $23,750 in any calendar year, at a price equal to 95% of the closing price of the Common Stock as reported on the New York Stock Exchange at the end of each offering period. As of December 31, 2025, the Company had 3.0 million shares available for purchase under the ESP Plan. The ESP Plan is considered non-compensatory under FASB ASC Topic 718 and, as a result, the Company does not record stock-based compensation expense for employee share purchases. The Company received $32.5 million, $28.2 million and $25.1 million in cash from employee share purchases under the ESP Plan during 2025, 2024 and 2023, respectively.

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Fees receivable, allowance	$ 5,000	$ 8,500
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0005	$ 0.0005
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	163,602,067	163,602,067
Treasury Stock, Common, Shares (in shares)	92,752,769	86,222,214

Accounts Payable and Accrued and Other Liabilities (Tables)

12 Months Ended

Dec. 31, 2025

Payables and Accruals [Abstract]

Schedule of Accounts Payable and Accrued Liabilities

The Company’s Accounts payable and accrued liabilities are summarized in the table below (in thousands).


	December 31,
	2025		2024
Accounts payable	$	49,778	$	55,793
Payroll and employee benefits payable	284,238		247,043

Bonus payable	298,295		291,484
Commissions payable	179,416		184,861
Income tax payable	51,256		38,690
VAT payable	76,926		64,501
Current portion of operating lease liabilities	96,076		100,312
Other accrued liabilities	200,548		223,405
Total accounts payable and accrued liabilities	$	1,236,533	$	1,206,089

Schedule of Other Liabilities

The Company’s Other liabilities are summarized in the table below (in thousands).


	December 31,
	2025		2024
Non-current deferred revenues	$	31,569	$	27,389
Long-term taxes payable	149,765		122,126
Benefit plan-related liabilities	215,286		183,720
Non-current deferred tax liabilities	29,314		48,742
Other	20,592		24,815
Total other liabilities	$	446,526	$	406,792

Debt

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Debt

The Company’s total outstanding borrowings are summarized in the table below (in thousands).


	December 31,
Description	2025		2024
2024 Credit Agreement - Revolving credit facility (1)	$	—	$	274,400
4.50% Senior Notes due 2028 (“2028 Notes”)	800,000		800,000
3.63% Senior Notes due 2029 (“2029 Notes”)	600,000		600,000
3.75% Senior Notes due 2030 (“2030 Notes”)	800,000		800,000
4.95% Senior Notes due 2031 (“2031 Notes”)	350,000		—
5.60% Senior Notes due 2035 (“2035 Notes”)	450,000		—
Other (2)	5,000		5,000
Principal amount outstanding (3)	3,005,000		2,479,400
Less: Deferred financing fees and unamortized discounts (4)	(23,326)		(19,485)
Net balance sheet carrying amount	$	2,981,674	$	2,459,915

(1)The Company had approximately $1.0 billion of available borrowing capacity on the 2024 Credit Agreement revolver (not including the expansion feature) as of December 31, 2025.

(2)Consists of a State of Connecticut economic development loan originated in 2019 with a 10-year maturity and bears interest at a fixed rate of 1.75%. The Company expects to repay the loan in 2026.

(3)The weighted average annual effective rate on the Company’s outstanding debt for 2025, including the effects of its interest rate swaps discussed below, was 4.66%.

(4)Deferred financing fees and unamortized discounts and are being amortized to Interest expense over the term of the related debt obligation.

2024 Credit Agreement

On March 26, 2024, the Company entered into a Credit Agreement (the “2024 Credit Agreement”) among the Company, as borrower, the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent (the “Administrative Agent”).

The 2024 Credit Agreement provides for a $1.0 billion senior unsecured five-year revolving facility. The facility may be increased, at the Company’s option and under certain conditions, by up to an additional $750.0 million in the aggregate. The facility may be used for revolving loans, and up to $75.0 million may be used for letters of credit. The revolving loans may be borrowed, repaid and re-borrowed until March 26, 2029, at which time all amounts borrowed must be repaid, subject to customary extension mechanics.

Interest under the revolving facility accrues, at a variable rate, based on, at our option, (i) the Secured Overnight Funding Rate (“SOFR”) plus a credit spread adjustment of 0.10% or (ii) an alternate base rate (“Base Rate”) plus, in each case, an applicable margin, and is payable monthly. The applicable margin ranges between 1.125% and 1.75%, depending on the lower rate determined by either the Company’s leverage ratio or the credit rating of the Company’s senior unsecured debt. At December 31, 2025, the applicable all-in margin on the revolving facility was 1.350% (including the credit spread adjustment). The contractual annualized interest rate as of December 31, 2025 on the 2024 Credit Agreement was 5.35%, which consisted of Term Secured Overnight Financing Rate (“SOFR”) of 4.00% plus a margin of 1.35%. The commitment fee payable on the

unused portion of the facility is equal to between 0.125% and 0.25% based on utilization of the facility. The Company has also agreed to pay customary letter of credit fees.

The 2024 Credit Agreement contains certain customary restrictive loan covenants, including, among others, a financial covenant requiring a maximum leverage ratio and covenants limiting the Company’s ability to grant liens, make acquisitions, be acquired and the ability of the Company’s subsidiaries to incur indebtedness. Subsidiaries of the Company are not required to guarantee obligations under the facility, unless such subsidiaries guarantee indebtedness in excess of a threshold set out in the 2024 Credit Agreement, subject to certain limitations and exceptions.

The 2024 Credit Agreement contains customary events of default that include, among others, non-payment of principal, interest or fees, material inaccuracy of representations and warranties, violation of covenants, cross defaults to certain other indebtedness, bankruptcy and insolvency events, ERISA defaults, material judgments, and events constituting a change of control. The occurrence of an event of default allows the lenders to terminate their obligations to lend under the 2024 Credit Agreement and could result in the acceleration of the Company’s obligations under the facility.

2031 and 2035 Notes

On November 20, 2025, the Company completed the public offering and issuance of $350.0 million aggregate principal amount of its 4.950% Senior Notes due 2031 and $450.0 million aggregate principal amount of its 5.600% Senior Notes due 2035 (together, the “Notes”). The 2031 Notes were issued at an issue price of 99.970% and the the 2035 Notes were issued at an issue price of 99.992%. The Notes were offered and sold pursuant to Gartner’s automatic shelf registration statement on Form S-3 (File No. 333-291447) and the prospectus included therein, filed with the Securities and Exchange Commission on November 12, 2025, and supplemented by the prospectus supplement dated November 13, 2025.

Gartner received approximately $799.9 million in net proceeds, after discounts and before underwriting fees and offering expenses, from the sale of the Notes. The Company used a portion of the net proceeds from the offering of the notes to repay the $274.4 million then outstanding under the 2024 Credit Agreement and to pay related fees and expenses, with remaining amounts to be used for general corporate purposes, which may include, without limitation, potential repurchases of its common stock.

2029 Notes

On June 18, 2021, the Company issued $600.0 million aggregate principal amount of 3.625% Senior Notes due 2029. The 2029 Notes were issued pursuant to an indenture, dated as of June 18, 2021 (the “2029 Note Indenture”), among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee.

The 2029 Notes were issued at an issue price of 100.0% and bear interest at a rate of 3.625% per annum. Interest on the 2029 Notes is payable on June 15 and December 15 of each year, beginning on December 15, 2021. The 2029 Notes will mature on June 15, 2029. The Company may redeem some or all of the 2029 Notes at any time on or after June 15, 2024 for cash at the redemption prices set forth in the 2029 Note Indenture, plus accrued and unpaid interest to, but excluding, the redemption date.

2030 Notes

On September 28, 2020, the Company issued $800.0 million aggregate principal amount of 3.75% Senior Notes due 2030. The 2030 Notes were issued pursuant to an indenture, dated as of September 28, 2020 (the “2030 Note Indenture”), among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee.

The 2030 Notes were issued at an issue price of 100.0% and bear interest at a rate of 3.75% per annum. Interest on the 2030 Notes is payable on April 1 and October 1 of each year, beginning on April 1, 2021. The 2030 Notes will mature on October 1, 2030.

The Company may redeem some or all of the 2030 Notes at any time on or after October 1, 2025 for cash at the redemption prices set forth in the 2030 Note Indenture, plus accrued and unpaid interest to, but excluding, the redemption date. Prior to October 1, 2025, the Company may redeem up to 40% of the aggregate principal amount of the 2030 Notes in connection with certain equity offerings, or some or all of the 2030 Notes with a “make-whole” premium, in each case subject to the terms set forth in the 2030 Note Indenture.

2028 Notes

On June 22, 2020, the Company issued $800.0 million aggregate principal amount of 4.50% Senior Notes due 2028. The 2028 Notes were issued pursuant to an indenture, dated as of June 22, 2020 (the “2028 Note Indenture”), among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee.

The 2028 Notes were issued at an issue price of 100.0% and bear interest at a rate of 4.50% per annum. Interest on the 2028 Notes is payable on January 1 and July 1 of each year, beginning on January 1, 2021. The 2028 Notes will mature on July 1, 2028.

The Company may redeem some or all of the 2028 Notes at any time on or after July 1, 2023 for cash at the redemption prices set forth in the 2028 Note Indenture, plus accrued and unpaid interest to, but excluding, the redemption date.

Interest Rate Swap

Prior to September 30, 2025, the Company had one fixed-for-floating interest rate swap contract with a notional value of $350.0 million. Under the contract, the Company paid a base fixed rate of 2.98% and in return received a floating Term SOFR base rate on 30-day notional borrowings. The swap contract matured in September 2025.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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-Section 45
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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Reference 21: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Revenue and Related Matters

12 Months Ended

Dec. 31, 2025

Revenue from Contract with Customer [Abstract]

Revenue and Related Matters

Our Business and Revenues

Gartner delivers its products and services globally through three reportable segments – Insights, Conferences and Consulting, as described below.

Insights

Insights revenues are derived from subscription contracts for insights products, representing substantially all of the segment’s revenue. The related revenues are deferred and recognized ratably over the applicable contract term (i.e., as services are provided over the contract period).

The Company enters into subscription contracts for published products that generally are for twelve-month periods or longer. Historically, approximately 80% to 85% of the Company’s annual and multi-year Insights subscription contracts provide for billing of the first full service period upon signing. In subsequent years, multi-year subscription contracts are normally billed prior to the contract’s anniversary date. Other Insights subscription contracts are usually invoiced in advance, commencing with the contract signing, on (i) a quarterly, monthly or other recurring basis or (ii) in accordance with a customized invoicing schedule. Insights contracts are generally non-cancelable and non-refundable, except for government contracts that may have cancellation or fiscal funding clauses, which have not historically resulted in material cancellations. When a subscription contract is invoiced, the Company records the billable amount as a fee receivable, representing its legally enforceable right to payment. The corresponding amount is recognized as deferred revenue until the underlying services are provided and control is transferred to the customer. In certain instances, the Company may have satisfied its performance obligations and earned revenue prior to invoicing the customer. In such cases, the Company records an unbilled receivable, which represents its right to payment for services already delivered but not yet billed.

Conferences

The Company earns revenues from both the attendees and exhibitors at Gartner conferences and meetings. Attendees are generally invoiced for the full attendance fee upon their completion of an online registration form or their signing of a contract, while exhibitors typically make several individual payments commencing with the signing of a contract. Almost all of the invoiced amounts are collected in advance of the related activity, resulting in the recording of deferred revenue. Both the attendee and exhibitor revenues are recognized as the related performance obligations are satisfied (i.e., when the related conference is held).

The Company defers certain costs directly related to specific conferences and meetings and expenses those costs in the period during which the related activity occurs. The Company’s policy is to defer only those costs that are incremental and directly

attributable to a specific activity, primarily prepaid site and production services costs. Other costs of organizing and producing conference activities, primarily Company personnel and non-conference specific expenses, are expensed in the period incurred.

Consulting

Consulting revenues, primarily derived from custom consulting and measurement services, are principally generated from fixed fee or time and materials engagements. Revenues from fixed fee engagements are recognized as the Company works to satisfy its performance obligations, while revenues from time and materials engagements are recognized as work is delivered and/or services are provided. In both of these circumstances, performance obligations are satisfied and control of the services is passed to customers over time (i.e., during the duration of the contract or consulting engagement). On a contract-by-contract basis, the Company typically uses actual labor hours incurred compared to total expected labor hours to measure the Company’s performance in respect of fixed fee engagements. If labor and other costs on an individual contract are expected to exceed the total contract value or the contract’s funded ceiling amount, the Company reflects an adjustment to the contract’s overall profitability in the period determined. Revenues related to contract optimization engagements are contingent in nature and are only recognized at the point in time when all of the conditions related to their payment have been satisfied.

Consulting customers are invoiced based on the specific terms and conditions in their underlying contracts. They are typically invoiced after the Company has satisfied some or all of the related performance obligations and the related revenue has been recognized. The Company records fees receivable for amounts that are billed or billable. Contract assets are also recorded representing amounts for which the Company has recognized revenue but lacks the unconditional right to payment as of the balance sheet date due to the required continued performance under the relevant contract, progress billing milestones or other billing-related restrictions.

Fees derived from assisting organizations in selecting the right business software for their needs are recognized when the leads are provided to vendors.

Disaggregated Revenue

Disaggregated revenue by reportable segment is presented in the tables below for the years indicated (in thousands).

By Primary Geographic Market (1)

Year Ended December 31, 2025


Primary Geographic Market	Insights		Conferences		Consulting		Other		Total

United States and Canada	$	3,117,883	$	381,544	$	342,287	$	190,887	$	4,032,601
Europe, Middle East and Africa	1,323,266		194,995		148,946		26,525		1,693,732
Other International	631,421		68,204		61,266		10,002		770,893
Total revenues	$	5,072,570	$	644,743	$	552,499	$	227,414	$	6,497,226

Year Ended December 31, 2024


Primary Geographic Market	Insights		Conferences		Consulting		Other		Total

United States and Canada	$	3,077,133	$	354,011	$	343,840	$	242,746	$	4,017,730
Europe, Middle East and Africa	1,169,314		165,306		142,849		40,346		1,517,815
Other International	582,604		63,907		71,848		13,507		731,866
Total revenues	$	4,829,051	$	583,224	$	558,537	$	296,599	$	6,267,411

Year Ended December 31, 2023


Primary Geographic Market	Insights		Conferences		Consulting		Other		Total

United States and Canada	$	2,973,062	$	317,531	$	317,645	$	302,804	$	3,911,042
Europe, Middle East and Africa	1,009,500		140,640		130,471		51,459		1,332,070
Other International	533,473		46,993		66,630		16,748		663,844
Total revenues	$	4,516,035	$	505,164	$	514,746	$	371,011	$	5,906,956

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

The Company’s revenue is generated primarily through direct sales to clients by domestic and international sales forces and a network of independent international sales agents. Most of the Company’s products and services are provided on an integrated worldwide basis and, because of this integrated delivery approach, it is not practical to precisely separate Company’s revenue by geographic location. Accordingly, revenue information presented in the above tables is based on internal allocations, which involve certain management estimates and judgments.

By Timing of Revenue Recognition

Year Ended December 31, 2025


Timing of Revenue Recognition	Insights		Conferences		Consulting		Other		Total

Transferred over time (1)	$	5,062,390	$	—	$	398,551	$	1,463	$	5,462,404
Transferred at a point in time (2)	10,180		644,743		153,948		225,951		1,034,822
Total revenues	$	5,072,570	$	644,743	$	552,499	$	227,414	$	6,497,226

Year Ended December 31, 2024


Timing of Revenue Recognition	Insights		Conferences		Consulting		Other		Total

Transferred over time (1)	$	4,818,254	$	—	$	420,160	$	2,689	$	5,241,103
Transferred at a point in time (2)	10,797		583,224		138,377		293,910		1,026,308
Total revenues	$	4,829,051	$	583,224	$	558,537	$	296,599	$	6,267,411

Year Ended December 31, 2023


Timing of Revenue Recognition	Insights		Conferences		Consulting		Other		Total

Transferred over time (1)	$	4,502,783	$	—	400,171		3,838		$	4,906,792
Transferred at a point in time (2)	13,252		505,164		114,575		367,173		1,000,164
Total revenues	$	4,516,035	$	505,164	$	514,746	$	371,011	$	5,906,956

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

Determining a measure of progress for performance obligations that are satisfied over time and when control transfers for performance obligations that are satisfied at a point in time requires management to make judgments that affect the timing of revenue recognition. A key factor in this determination is when the customer can direct the use of, and can obtain substantially all of the benefits from, the deliverable.

For performance obligations recognized in accordance with a time-elapsed output method, the Company’s efforts are expended consistently throughout the contractual period and the Company transfers control evenly by providing stand-ready services. For performance obligations satisfied under Consulting fixed fee or time and materials engagements, the Company believes that labor hours are the best measure of depicting the Company’s progress because labor output corresponds directly to the value of the Company’s performance to date as control is transferred.

For customer contracts that are greater than one year in duration, the aggregate amount of the transaction price allocated to performance obligations that are unsatisfied (or partially unsatisfied) as of December 31, 2025 was approximately $6.4 billion. The Company expects to recognize $3.9 billion, $2.0 billion and $0.5 billion of this revenue (most of which pertains to Insights) during the year ending December 31, 2026, the year ending December 31, 2027 and thereafter, respectively. The Company applies a practical expedient allowed in FASB ASC Topic 606 and, accordingly, it does not disclose such performance obligation information for customer contracts that have original durations of one year or less. The Company’s performance obligations for contracts meeting this ASC 606 disclosure exclusion primarily include: (i) stand-ready services under Insights subscription contracts; (ii) holding conferences and meetings where attendees and exhibitors can participate; and (iii) providing customized Consulting solutions for clients under fixed fee or time and materials engagements. The remaining duration of these performance obligations is generally less than one year, which aligns with the period that the parties have enforceable rights and obligations under the affected contracts.

Customer Contract Assets and Liabilities

The payment terms and conditions in the Company’s customer contracts vary. In some cases, customers prepay and, in other cases, after the Company conducts a credit evaluation, payment may be due in arrears. Because the timing of the Company’s service delivery typically differs from the timing of customer payments, the Company recognizes either a contract asset (the Company performs either fully or partially under the contract but a contingency remains) or a contract liability (upfront customer payments precede the Company’s performance, resulting in deferred revenue). Amounts recorded as contract assets are reclassified to fees receivable when all of the outstanding conditions have been resolved and the Company’s right to payment becomes unconditional. Contracts with payments due in arrears are also recognized as fees receivable. As contractual performance obligations are satisfied, the Company correspondingly relieves its contract liabilities and records the associated revenue.

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


	December 31,
	2025		2024
Assets:
Fees receivable, gross (1)	$	1,689,522	$	1,704,725
Contract assets recorded in Prepaid expenses and other current assets (2)	$	40,534	$	31,056
Contract liabilities:
Deferred revenues (current liability) (3)	$	2,810,056	$	2,762,927
Non-current deferred revenues recorded in Other liabilities (3)	31,569		27,389
Total contract liabilities	$	2,841,625	$	2,790,316

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

The Company recognized revenue of $2.4 billion, $2.3 billion and $2.0 billion during 2025, 2024 and 2023 respectively, which was attributable to deferred revenues that were recorded at the beginning of each such year. Those amounts primarily consisted of (i) Insights revenues and (ii) Conferences revenues pertaining to conferences and meetings that occurred during the reporting periods. During 2025, 2024 and 2023, the Company did not record any material impairments related to its contract assets.

Costs of Obtaining and Fulfilling a Customer Contract

When the Company concludes that a liability should be recognized for the costs of obtaining a customer contract and determines how such liability should be measured, certain commissions are capitalized as a recoverable direct incremental cost of obtaining the underlying contract. No other amounts are capitalized as a cost of obtaining or fulfilling a customer contract because no expenditures have been identified that meet the requisite capitalization criteria. For Insights and Consulting, the

Company amortizes deferred commissions on a systematic basis that aligns with the transfer to customers of the services to which the commissions relate. For Conferences, deferred commissions are expensed during the period when the related conference or meeting occurs.

During 2025, 2024 and 2023, deferred commission amortization expense was $612.3 million, $574.3 million and $550.5 million, respectively, and was included in Selling, general and administrative expense in the Consolidated Statements of Operations. The Company classifies Deferred commissions as a current asset on the Consolidated Balance Sheets at both December 31, 2025 and 2024 because those costs were, or will be, amortized over the twelve months following the respective balance sheet dates.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-15

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

+ Details

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
Cybersecurity Risk Management and Strategy Disclosure	Dec. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	Cybersecurity risk management, which involves resource commitments and management attention, is overseen both as a critical component of our overall risk management program and as a standalone program. We have implemented a risk-based, cross-functional approach to identifying, preventing, and mitigating cybersecurity threats and incidents, while also implementing controls and procedures that provide for the prompt escalation of certain cybersecurity incidents. Our cybersecurity program uses a layered strategy, relying on technology and human processes to safeguard our client’s data. We embed controls within our business processes and technology development, starting with design and engineering and extending to operations. Our defense-in-depth strategy utilizes numerous layers of security controls, processes, and procedures across our information systems and networks, including but not limited to, vulnerability management, multi-factor authentication (MFA), identity access management (IAM), privileged access management (PAM), endpoint security, mobile security, application security, encryption, network security, cloud security, web security, and event monitoring and logging. Aspects of our program undergo several annual independent third-party audits and reviews, and are part of continuous bug bounty and responsible disclosure programs. We regularly review and update our cybersecurity program to address emerging threats and maintain alignment with industry best practices. We maintain a written Information Security Policy, which establishes the foundational components of our cybersecurity program and our high-level security responsibilities over all technologies, facilities and data. When engaging service providers and third-party vendors, we perform due diligence to assess whether these providers have appropriate privacy and security controls, and we generally require these providers to implement appropriate protective measures, and to use confidential information solely for the purposes of performing their services. Additionally, we have adopted a documented Incident Response Plan that applies in the event of a cybersecurity incident to provide a standardized framework for response. Our incident response process generally follows the NIST 800-61 framework and focuses on four phases: preparation; detection and analysis; containment, eradication and recovery; and post-incident remediation. We have implemented a security training and awareness program for all Gartner employees and third-party contractors. Employees receive security training in connection with onboarding as well as annual awareness and training activities throughout their employment. Further, Gartner carries cybersecurity insurance covering the company and its subsidiaries. Material Cybersecurity Risks, Threats & Incidents. While we have not experienced any material cybersecurity threats or incidents, there can be no guarantee that we will not be the subject of future successful attacks, threats or incidents. Additional information on cybersecurity risks we face can be found in Part I, Item 1A “Risk Factors” of this Report under the heading “Strategic and Operational Risks – We are exposed to risks related to cybersecurity,” which should be read in conjunction with the foregoing information.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	Cybersecurity risk management, which involves resource commitments and management attention, is overseen both as a critical component of our overall risk management program and as a standalone program. We have implemented a risk-based, cross-functional approach to identifying, preventing, and mitigating cybersecurity threats and incidents, while also implementing controls and procedures that provide for the prompt escalation of certain cybersecurity incidents.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	The Audit Committee has the primary responsibility of assisting our Board of Directors in overseeing risks related to cybersecurity matters. The Board and the Audit Committee receive quarterly cybersecurity-related reports from our Chief Information Officer (“CIO”), that address several topics, including cybersecurity strategy, the threat environment, the status of ongoing information security program initiatives, and information security program metrics. Additionally, we have documented protocols by which certain cybersecurity incidents that meet established reporting thresholds are escalated within the Company and, where appropriate, reported to the Board and/or the Audit Committee. At the management level, our CIO, who reports directly to the CEO, has over 20 years of experience serving in IT management, software development, and technology-based roles across a variety of industries, including publishing, media and entertainment, and financial and insurance services. Our Chief Information Security Officer (“CISO”), who reports directly to the CIO, has extensive cybersecurity knowledge and skills gained from over 25 years of work experience serving in executive security roles and in a variety of industries such as telecommunications, enterprise service companies, and healthcare. Our CISO is responsible for understanding, managing, and communicating cybersecurity risk internally to our management, and works closely with our Legal & Compliance team to oversee compliance with legal, regulatory, and contractual security requirements. Our CISO heads the Information Security Team, which is responsible for implementing, monitoring, and maintaining cybersecurity and data protection practices across our business. The Information Security Team covers a wide range of cyber and information security responsibilities. Our CISO also receives reports on cybersecurity threats on an ongoing basis and regularly reviews risk management measures implemented by the Company to identify and mitigate cybersecurity risks. In addition to our internal capabilities, we also engage external consultants, legal counsel, or other third-party advisors to assist with assessing, identifying, and managing cybersecurity risks.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Audit Committee has the primary responsibility of assisting our Board of Directors in overseeing risks related to cybersecurity matters.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Audit Committee has the primary responsibility of assisting our Board of Directors in overseeing risks related to cybersecurity matters. The Board and the Audit Committee receive quarterly cybersecurity-related reports from our Chief Information Officer (“CIO”), that address several topics, including cybersecurity strategy, the threat environment, the status of ongoing information security program initiatives, and information security program metrics. Additionally, we have documented protocols by which certain cybersecurity incidents that meet established reporting thresholds are escalated within the Company and, where appropriate, reported to the Board and/or the Audit Committee. At the management level, our CIO, who reports directly to the CEO, has over 20 years of experience serving in IT management, software development, and technology-based roles across a variety of industries, including publishing, media and entertainment, and financial and insurance services. Our Chief Information Security Officer (“CISO”), who reports directly to the CIO, has extensive cybersecurity knowledge and skills gained from over 25 years of work experience serving in executive security roles and in a variety of industries such as telecommunications, enterprise service companies, and healthcare. Our CISO is responsible for understanding, managing, and communicating cybersecurity risk internally to our management, and works closely with our Legal & Compliance team to oversee compliance with legal, regulatory, and contractual security requirements.
Cybersecurity Risk Role of Management [Text Block]	The Audit Committee has the primary responsibility of assisting our Board of Directors in overseeing risks related to cybersecurity matters. The Board and the Audit Committee receive quarterly cybersecurity-related reports from our Chief Information Officer (“CIO”), that address several topics, including cybersecurity strategy, the threat environment, the status of ongoing information security program initiatives, and information security program metrics. Additionally, we have documented protocols by which certain cybersecurity incidents that meet established reporting thresholds are escalated within the Company and, where appropriate, reported to the Board and/or the Audit Committee. At the management level, our CIO, who reports directly to the CEO, has over 20 years of experience serving in IT management, software development, and technology-based roles across a variety of industries, including publishing, media and entertainment, and financial and insurance services. Our Chief Information Security Officer (“CISO”), who reports directly to the CIO, has extensive cybersecurity knowledge and skills gained from over 25 years of work experience serving in executive security roles and in a variety of industries such as telecommunications, enterprise service companies, and healthcare. Our CISO is responsible for understanding, managing, and communicating cybersecurity risk internally to our management, and works closely with our Legal & Compliance team to oversee compliance with legal, regulatory, and contractual security requirements. Our CISO heads the Information Security Team, which is responsible for implementing, monitoring, and maintaining cybersecurity and data protection practices across our business. The Information Security Team covers a wide range of cyber and information security responsibilities. Our CISO also receives reports on cybersecurity threats on an ongoing basis and regularly reviews risk management measures implemented by the Company to identify and mitigate cybersecurity risks. In addition to our internal capabilities, we also engage external consultants, legal counsel, or other third-party advisors to assist with assessing, identifying, and managing cybersecurity risks.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The Audit Committee has the primary responsibility of assisting our Board of Directors in overseeing risks related to cybersecurity matters. The Board and the Audit Committee receive quarterly cybersecurity-related reports from our Chief Information Officer (“CIO”), that address several topics, including cybersecurity strategy, the threat environment, the status of ongoing information security program initiatives, and information security program metrics. Additionally, we have documented protocols by which certain cybersecurity incidents that meet established reporting thresholds are escalated within the Company and, where appropriate, reported to the Board and/or the Audit Committee.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	At the management level, our CIO, who reports directly to the CEO, has over 20 years of experience serving in IT management, software development, and technology-based roles across a variety of industries, including publishing, media and entertainment, and financial and insurance services. Our Chief Information Security Officer (“CISO”), who reports directly to the CIO, has extensive cybersecurity knowledge and skills gained from over 25 years of work experience serving in executive security roles and in a variety of industries such as telecommunications, enterprise service companies, and healthcare.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	Our CISO also receives reports on cybersecurity threats on an ongoing basis and regularly reviews risk management measures implemented by the Company to identify and mitigate cybersecurity risks.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Computation of Earnings Per Share - Common Share Equivalents Not Included in the Computation of Diluted EPS (Details) - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Anti-dilutive outstanding awards associated with stock-based compensation plans (in shares)	0.3	0.1	0.1
Average market price per share of Common Stock during the year (in dollars per share)	$ 358.33	$ 475.66	$ 351.31

Contingencies	12 Months Ended
Contingencies	Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Legal Matters. The Company is involved in legal proceedings, claims and compliance matters arising in the ordinary course of business. The Company records a provision in its consolidated financial statements when it is determined that an unfavorable outcome in one of these matters is probable and the amount of the loss can be reasonably estimated. The Company believes that the potential liability, if any, in excess of amounts already accrued for these contingencies will not have a material effect on its financial position, cash flows or results of operations when resolved in a future period. Indemnifications. The Company has various agreements that may obligate it to indemnify the other party with respect to certain matters. Generally, these indemnification clauses are included in contracts arising in the normal course of business under which the Company customarily agrees to hold the other party harmless against losses arising from a breach of representations related to matters such as title to assets sold and licensed or certain intellectual property rights. It is not possible to predict the maximum potential amount of future payments under these indemnification agreements due to the conditional nature of the Company’s obligations and the unique facts of each particular agreement. Historically, payments made by the Company under these agreements have not been material. As of December 31, 2025, the Company did not have any material payment obligations under any such indemnification agreements.

Derivatives and Hedging - Outstanding Derivatives Contracts (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) contract	Dec. 31, 2025 USD ($) contract
Derivatives, Fair Value [Line Items]
Number of Contracts \| contract	120
Notional Amounts	$ 1,006,904
Fair Value Asset (Liability), Net	3,079
Unrealized Loss Recorded in AOCI/L	(9,800)
Foreign currency forward contracts \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Unrealized Loss Recorded in AOCI/L	$ 0
Foreign currency forward contracts \| Not Designated as Hedging Instrument \| Other current assets
Derivatives, Fair Value [Line Items]
Number of Contracts \| contract		104
Notional Amounts		$ 427,482
Fair Value Asset (Liability), Net		$ 230
Foreign currency forward contracts \| Not Designated as Hedging Instrument \| Other current liabilities
Derivatives, Fair Value [Line Items]
Number of Contracts \| contract	119
Notional Amounts	$ 656,904
Fair Value Asset (Liability), Net	(16)
Interest rate swaps \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Unrealized Loss Recorded in AOCI/L	$ (9,800)
Interest rate swaps \| Designated as Hedging Instrument \| Other current assets
Derivatives, Fair Value [Line Items]
Number of Contracts \| contract	1
Notional Amounts	$ 350,000
Fair Value Asset (Liability), Net	$ 3,095

Goodwill and Intangible Assets - Changes to the Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning Balance	$ 2,930,205	$ 2,937,260
Additions due to an acquisition
Foreign currency translation impact	9,654	(7,055)
Impairment loss	(150,000)	0	$ 0
Reclassified as held-for-sale	(49,057)
Ending Balance	2,740,802	2,930,205	2,937,260
Accumulated impairment losses	(150,000)
Digital Markets Reporting Unit
Goodwill [Roll Forward]
Impairment loss	(150,000)
Insights
Goodwill [Roll Forward]
Beginning Balance	2,453,880	2,460,448
Additions due to an acquisition
Foreign currency translation impact	6,435	(6,568)
Impairment loss	0
Reclassified as held-for-sale	0
Ending Balance	2,460,315	2,453,880	2,460,448
Accumulated impairment losses	0
Conferences
Goodwill [Roll Forward]
Beginning Balance	183,920	183,997
Additions due to an acquisition
Foreign currency translation impact	132	(77)
Impairment loss	0
Reclassified as held-for-sale	0
Ending Balance	184,052	183,920	183,997
Accumulated impairment losses	0
Consulting
Goodwill [Roll Forward]
Beginning Balance	95,304	95,714
Additions due to an acquisition
Foreign currency translation impact	1,131	(410)
Impairment loss	0
Reclassified as held-for-sale	0
Ending Balance	96,435	95,304	95,714
Accumulated impairment losses	0
Other
Goodwill [Roll Forward]
Beginning Balance	197,101	197,101
Additions due to an acquisition
Foreign currency translation impact	1,956	0
Impairment loss	(150,000)
Reclassified as held-for-sale	(49,057)
Ending Balance	0	$ 197,101	$ 197,101
Accumulated impairment losses	$ (150,000)

Derivatives and Hedging (Tables)

12 Months Ended

Dec. 31, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions

The tables below provide information regarding the Company’s outstanding derivative contracts as of the dates indicated (in thousands, except for number of contracts).

December 31, 2025

Derivative Contract Type

Number of
Contracts

Notional
Amounts

Fair Value
Asset
(Liability), Net (3)

Balance Sheet
Line Item

Foreign currency forwards (1)

104

427,482

230

Other current assets

December 31, 2024


Derivative Contract Type	Number of Contracts	Notional Amounts		Fair Value Asset (Liability), Net (3)		Balance Sheet Line Item	Unrealized Loss Recorded in AOCI/L
Interest rate swaps (2)	1	$	350,000	$	3,095	Other current assets	$	(9,800)
Foreign currency forwards (1)	119	656,904		(16)		Other current liabilities	—
Total	120	$	1,006,904	$	3,079		$	(9,800)

(1)The Company has foreign exchange transaction risk because it typically enters into transactions in the normal course of business that are denominated in foreign currencies that differ from the local functional currency. The Company enters into short-term foreign currency forward exchange contracts to mitigate the cash flow risk associated with changes in foreign currency rates on forecasted foreign currency transactions. These contracts are accounted for at fair value with realized and unrealized gains and losses recognized in Other income, net because the Company does not designate these contracts as hedges for accounting purposes. All of the outstanding foreign currency forward exchange contracts at December 31, 2025 matured before January 27, 2026.

(2)The Company de-designated all of its interest rate swaps effective June 30, 2020. Accordingly, hedge accounting is not applicable, and subsequent changes to fair value of the interest rate swaps were recorded in Other income, net. The amounts previously recorded in Accumulated other comprehensive loss were amortized into Interest expense over the terms of the hedged forecasted interest payments. Note 6 — Debt provides additional information regarding the Company’s interest rate swap contract.

(3)See Note 14 — Fair Value Disclosures for the determination of the fair values of these instruments.

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

The table below provides information regarding amounts recognized in the Consolidated Statements of Operations for derivative contracts for the years ended December 31 (in thousands).


Amount Recorded In	2025		2024		2023
Interest expense (1)	$	13,205	$	19,056	$	20,062
Other expense (income), net (2)	2,911		(6,380)		(5,836)
Total expense, net	$	16,116	$	12,676	$	14,226

(1)Consists of interest expense from interest rate swap contracts.

(2)Consists of net realized and unrealized gains and losses on foreign currency forward contracts, gains and losses on de-designated interest rate swaps.

Leases (Tables)

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Lease Costs

The table below presents the Company’s net lease cost and certain other information related to the Company’s leasing activities as of and for the years ended December 31, 2025, 2024 and 2023 (dollars in thousands).


	Year Ended December 31,
Description	2025			2024			2023
Operating lease cost (1)	$	88,016		$	101,897		$	112,948
Variable lease cost (2)	19,110			23,996			22,254
Sublease income	(49,695)			(48,698)			(53,377)
Total lease cost, net (3) (4)	$	57,431		$	77,195		$	81,825

Cash paid for amounts included in the measurement of operating lease liabilities	$	120,897		$	147,672		$	145,226
Cash receipts from sublease arrangements	$	44,758		$	46,245		$	51,968
Right-of-use assets obtained in exchange for new operating lease liabilities	$	22,660		$	28,291		$	12,715

As of December 31,	2025			2024			2023
Weighted average remaining lease term for operating leases (in years)	5.9			6.6			7.3
Weighted average discount rate for operating leases	5.6		%	6.4		%	6.6		%

(1)Included in operating lease cost was $33.4 million, $36.4 million and $43.1 million of costs for subleasing activities during 2025, 2024, and 2023 respectively.

(2)These amounts are primarily variable lease and nonlease costs that were not fixed at the lease commencement date or are dependent on something other than an index or a rate.

(3)The Company capitalized de minimus amounts for initial direct costs for operating leases during 2025 and 2023.

(4)Amount excludes impairment charges of $4.8 million, $10.9 million, and $20.4 million for the years ended December 31, 2025, 2024, and 2023 respectively, as discussed below.

Operating Lease Maturity Schedule

As of December 31, 2025, the (i) maturities of operating lease liabilities under non-cancelable arrangements and (ii) estimated future sublease cash receipts from non-cancelable arrangements were as follows (in thousands):


	Operating		Sublease
	Lease		Cash
Period ending December 31,	Payments		Receipts
2026	$	109,239	$	46,268
2027	99,874		46,442
2028	49,822		6,653
2029	39,629		2,921
2030	31,828		2,372
Thereafter	100,412		3,016
Total future minimum operating lease payments and estimated sublease cash receipts (1)	430,804		$	107,672
Imputed interest	(64,528)
Total operating lease liabilities per the Consolidated Balance Sheet	$	366,276

(1)Approximately 74% of the operating lease payments pertain to properties in the United States.

Supplemental Balance Sheet Information

The table below indicates where the discounted operating lease payments from the above table are classified in the Consolidated Balance Sheet (in thousands).


	December 31,
Description	2025		2024
Accounts payable and accrued liabilities	$	96,076	$	100,312
Operating lease liabilities	270,200		339,779
Total operating lease liabilities per the Consolidated Balance Sheet	$	366,276	$	440,091

Employee Benefits - Information Related to Changes in Projected Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year	$ 69,710	$ 68,403	$ 55,311
Service cost	7,255	6,765	5,363
Interest cost	3,101	2,520	2,173
Actuarial (gain) loss due to assumption changes and plan experience	(707)	(772)	2,527
Benefits payments	(4,180)	(2,838)	(1,974)
Acquisition/Business Combination/Divestiture	0	0	(268)
Other	1,045	0	4,628
Foreign currency impact	5,571	(4,368)	643
Projected benefit obligation at end of year	$ 81,795	$ 69,710	$ 68,403
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Weighted average discount rate	4.55%	3.94%	3.48%
Average compensation increase	3.40%	3.51%	3.29%
Cash balance interest credit rate	4.40%	3.50%	3.10%
Expected future benefit payments, in 2026	$ 4,700
Expected future benefit payments, in 2027	5,100
Expected future benefit payments, in 2028	6,300
Expected future benefit payments, in 2029	6,700
Expected future benefit payments, in 2030	7,200
Expected future benefit payments in the five years thereafter	$ 40,300

Acquisition and Divestiture (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Feb. 28, 2023
Business Combination [Line Items]
Gain from sale of divested operation		$ 0	$ 0	$ 135,410
Acquisition and integration charges		$ 0	973	$ 9,587
TalentNeuron
Business Combination [Line Items]
Sale of business, consideration					$ 161,100
Gartner Insights Products
Business Combination [Line Items]
Percent of outstanding membership interests acquired	100.00%
Purchase price	$ 7,900
Payment for contingent consideration liability, investing activities			$ 2,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
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-Section 50
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+ Details

Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2025

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

The Company maintains an allowance for bad debt. The table below summarizes the activity in the Company’s allowance for losses for the years ended December 31 (in thousands).


	Balance at Beginning of Year		Additions Charged to Expense		Deductions from the Reserve		Balance at End of Year
2025	$	8,500	$	(1,000)	$	(2,500)	$	5,000
2024	$	9,000	$	5,000	$	(5,500)	$	8,500
2023	$	9,000	$	7,200	$	(7,200)	$	9,000

Income Taxes - Schedule of Components of Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S.	$ 302,391	$ 629,656	$ 574,458
Non-U.S.	665,727	757,718	572,671
Income before income taxes	$ 968,118	$ 1,387,374	$ 1,147,129

Business and Significant Accounting Policies - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2023	Dec. 31, 2022
Restricted Cash and Cash Equivalent Item [Line Items]
Cash and cash equivalents	$ 1,933,147	$ 1,722,521	$ 1,318,999	$ 697,999
Prepaid expenses and other current assets	0	0	600	0
Other assets	0	0	0	600
Cash and cash equivalents and restricted cash per the Consolidated Statements of Cash Flows	1,933,147	$ 1,722,521	$ 1,319,599	$ 698,599
2022 Acquisition
Restricted Cash and Cash Equivalent Item [Line Items]
Deferred consideration	$ 600

Computation of Earnings Per Share - Calculations Of Basic And Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net income used for calculating basic and diluted income per share	$ 729,231	$ 1,253,715	$ 882,466
Denominator:
Weighted average common shares used in the calculation of basic income per share (in shares)	75,355	77,785	79,004
Dilutive effect of outstanding awards associated with stock-based compensation plans (in shares)	250	553	676
Shares used in the calculation of diluted income per share (in shares)	75,605	78,338	79,680
Earnings per share
Basic (in dollars per share)	$ 9.68	$ 16.12	$ 11.17
Diluted (in dollars per share)	$ 9.65	16.00	$ 11.08
Sale of intellectual property, income tax benefit (in dollars per share)		$ 2.08

Segment Information - Summarized Information by Geographic Location (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Long-lived assets:
Long-lived assets	$ 941,958	$ 998,246
United States and Canada
Long-lived assets:
Long-lived assets	572,869	574,559
Europe, Middle East and Africa
Long-lived assets:
Long-lived assets	304,606	326,196
Other International
Long-lived assets:
Long-lived assets	$ 64,483	$ 97,491

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Dec. 31, 2025
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Leases - Lease Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Operating Lease Payments
2026	$ 109,239
2027	99,874
2028	49,822
2029	39,629
2030	31,828
Thereafter	100,412
Total future minimum operating lease payments and estimated sublease cash receipts	430,804
Imputed interest	(64,528)
Total operating lease liabilities per the Consolidated Balance Sheet	366,276	$ 440,091
Sublease Cash Receipts
2026	46,268
2027	46,442
2028	6,653
2029	2,921
2030	2,372
Thereafter	3,016
Total future estimated sublease cash receipts	$ 107,672
UNITED STATES
Sublease Cash Receipts
Percentage of lease payments	74.00%

Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits, Excluding Interest and Penalties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$ 257,533	$ 148,390	$ 137,227
Additions based on tax positions related to the current year	41,465	116,373	22,822
Reductions based on tax positions related to current year	0	0	0
Additions for tax positions of prior years	4,888	7,925	4,361
Reductions for tax positions of prior years	(130)	(888)	(14)
Reductions for expiration of statutes	(7,911)	(10,573)	(15,625)
Settlements	0	0	(441)
Change in foreign currency exchange rates	5,737		60
Change in foreign currency exchange rates		(3,694)
Ending balance	$ 301,582	$ 257,533	$ 148,390

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax [Line Items]
Non-current deferred tax assets	$ 245,434	$ 262,757
Non-current deferred tax liabilities	29,314	48,742
Deferred tax asset, intra-entity transfer, intangible assets		163,200
Valuation allowance	86,787	76,285
Effective income tax rate reconciliation, amortization, benefit		161,900
Unrecognized tax benefits	301,582	257,533	$ 148,390	$ 137,227
Unrecognized tax benefits that would impact effective tax rate	295,700
Unrecognized tax benefits that would result adjustments to other tax accounts	5,900
Income tax penalties and interest expense	25,900	21,100	$ 17,400
Income tax examination, penalties and interest expense	4,300	5,000
Accumulated undistributed earnings	107,300
State and local jurisdiction
Income Tax [Line Items]
Operating loss carryforwards	8,200
Tax credit carryforwards	5,000
State and local jurisdiction \| Expire within six to fifteen years
Income Tax [Line Items]
Operating loss carryforwards	$ 3,500
State and local jurisdiction \| Expire within six to fifteen years \| Minimum
Income Tax [Line Items]
Operating loss carryforwards expiration period	6 years
State and local jurisdiction \| Expire within six to fifteen years \| Maximum
Income Tax [Line Items]
Operating loss carryforwards expiration period	15 years
State and local jurisdiction \| Expire within sixteen to twenty years
Income Tax [Line Items]
Operating loss carryforwards	$ 4,700
State and local jurisdiction \| Expire within sixteen to twenty years \| Minimum
Income Tax [Line Items]
Operating loss carryforwards expiration period	16 years
State and local jurisdiction \| Expire within sixteen to twenty years \| Maximum
Income Tax [Line Items]
Operating loss carryforwards expiration period	20 years
State and local jurisdiction \| Expire within five to six years \| Minimum
Income Tax [Line Items]
Tax credit carryforwards, expiration period	5 years
State and local jurisdiction \| Expire within five to six years \| Maximum
Income Tax [Line Items]
Tax credit carryforwards, expiration period	6 years
Foreign Tax Jurisdiction
Income Tax [Line Items]
Operating loss carryforwards	$ 3,100,000
Tax credit carryforwards	29,300
Other Assets
Income Tax [Line Items]
Non-current deferred tax assets	245,400	262,800
Other liabilities
Income Tax [Line Items]
Non-current deferred tax liabilities	$ 29,300	$ 48,700

Derivatives and Hedging - Derivative Gains And Losses That Have Been Recognized In Condensed Consolidated Statements Of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Total expense, net	$ 16,116	$ 12,676	$ 14,226
Interest expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Total expense, net	$ 13,205	$ 19,056	$ 20,062
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income, net	Other income, net	Other income, net
Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total expense, net	$ 2,911	$ (6,380)	$ (5,836)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income, net	Other income, net	Other income, net

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4C
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C

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+ Details

Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes to the Carrying Amount of Goodwill by Segment

The table below presents changes to the carrying amount of goodwill by segment during the two-year period ended December 31, 2025 (in thousands).


	Insights		Conferences		Consulting		Other		Total
Balance at December 31, 2023	$	2,460,448	$	183,997	$	95,714	$	197,101	$	2,937,260
Additions due to an acquisition
Foreign currency translation impact	(6,568)		(77)		(410)		—		(7,055)
Balance at December 31, 2024	2,453,880		183,920		95,304		197,101		2,930,205
Impairment loss (1)	—		—		—		(150,000)		(150,000)
Reclassified as held-for-sale (2)	—		—		—		(49,057)		(49,057)
Foreign currency translation impact	6,435		132		1,131		1,956		9,654
Balance at December 31, 2025	$	2,460,315	$	184,052	$	96,435	$	—	$	2,740,802

Accumulated impairment loss (1)	$	—	$	—	$	—	$	(150,000)	$	(150,000)

(1)The Company recognized an impairment loss of $150.0 million during the year ended December 31, 2025.

(2)Represents amounts reclassified to Assets held-for-sale due to the pending divestiture of the Company’s Digital Markets business. See Note 19 — Subsequent Events for additional information.

Schedule of Amortizable Intangible Assets

Changes in finite-lived intangible assets during the two-year period ended December 31, 2025 are presented in the tables below (in thousands).


December 31, 2025	Customer Relationships		Other		Total
Gross cost at December 31, 2024	1,071,917		10,200		$	1,082,117

Intangible assets fully amortized	(73,589)		—		(73,589)

Foreign currency translation impact	23,429		—		23,429
Gross cost	1,021,757		10,200		1,031,957
Accumulated amortization (1)	(687,416)		(8,238)		(695,654)
Balance at December 31, 2025	$	334,341	$	1,962	$	336,303


December 31, 2024	Customer Relationships		Technology-related		Other		Total
Gross cost at December 31, 2023	$	1,077,183	$	11,200	$	10,200	$	1,098,583

Intangible assets fully amortized	—		(11,200)		—		(11,200)
Foreign currency translation impact	(5,266)		—		—		(5,266)
Gross cost	1,071,917		—		10,200		1,082,117
Accumulated amortization (1)	(665,131)		—		(7,297)		(672,428)
Balance at December 31, 2024	$	406,786	$	—	$	2,903	$	409,689

Schedule of Estimated Future Amortization Expense by Year

The estimated future amortization expense by year for finite-lived intangible assets is presented in the table below (in thousands).


2026	$	80,193
2027	79,585
2028	78,114
2029	78,035
2030	20,376
	$	336,303

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

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+ Details

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2025
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On January 29, 2026, the Company's Board of Directors authorized incremental share repurchases of up to an additional $500 million of Gartner's common stock. This authorization is in addition to the previously authorized repurchases of up to $7.0 billion, which as of the end of December 2025 had approximately $750 million remaining. On January 29, 2026, the Company entered into a definitive agreement to sell its Digital Markets business. As of December 31, 2025, the assets and liabilities of Digital Markets were considered held for sale, resulting in $106.4 million of assets held for sale and $20.5 million of liabilities held for sale on the Consolidated Balance Sheet. The majority of the held for sale assets were goodwill, property, equipment and leasehold improvements, net and accounts receivable, with carrying amounts of $49.1 million, $26.3 million and $25.2 million, respectively, while the majority of the held for sale liabilities was accounts payable and accrued liabilities, with a carrying amount of $14.2 million. On February 5, 2026, the Company completed the sale of Digital Markets for approximately $110.0 million, prior to customary purchase price adjustments.

Fair Value Disclosures

12 Months Ended

Dec. 31, 2025

Fair Value Disclosures [Abstract]

Fair Value Disclosures

The Company’s financial instruments include cash equivalents, fees receivable from customers, accounts payable and accrued liabilities, all of which are normally short-term in nature. The Company believes that the carrying amounts of these financial instruments reasonably approximate their fair values due to their short-term nature. The Company’s financial instruments also include its outstanding variable-rate borrowings under the 2024 Credit Agreement. The Company believes that the carrying amounts of its variable-rate borrowings reasonably approximate their fair values because the rates of interest on those borrowings reflect current market rates of interest for similar instruments with comparable maturities.

The Company enters into a limited number of derivatives transactions but does not enter into repurchase agreements, securities lending transactions or master netting arrangements. Receivables or payables that result from derivatives transactions are recorded gross in the Consolidated Balance Sheets.

FASB ASC Topic 820 ("ASC 820") provides a framework for the measurement of fair value and a valuation hierarchy based on the transparency of inputs used in the valuation of assets and liabilities. Classification within the valuation hierarchy is based on the lowest level of input that is significant to the resulting fair value measurement. The valuation hierarchy contains three levels. Level 1 measurements consist of quoted prices in active markets for identical assets or liabilities. Level 2 measurements

include significant other observable inputs such as quoted prices for similar assets or liabilities in active markets; identical assets or liabilities in inactive markets; observable inputs such as interest rates and yield curves; and other market-corroborated inputs. Level 3 measurements include significant unobservable inputs such as internally-created valuation models. Generally, the Company does not utilize Level 3 valuation inputs to remeasure any of its assets or liabilities. However, Level 3 inputs may be used by the Company when certain long-lived assets, including identifiable intangible assets, goodwill, and right-of-use assets are measured at fair value on a nonrecurring basis when there are indicators of impairment. Additionally, Level 3 inputs may be used by the Company in its required annual impairment review of goodwill. Information regarding the periodic assessment of the Company’s goodwill is included in Note 1 — Business and Significant Accounting Policies. The Company does not typically transfer assets or liabilities between different levels of the valuation hierarchy.

The table below presents the fair value of certain financial assets and liabilities that are recorded at fair value and measured on a recurring basis in the Company’s Consolidated Balance Sheets (in thousands).



	December 31,
Description	2025		2024
Assets:
Values based on Level 1 inputs:
Deferred compensation plan assets (1)	$	19,188	$	18,089
Total Level 1 inputs	19,188		18,089
Values based on Level 2 inputs:
Deferred compensation plan assets (1)	155,949		128,670
Foreign currency forward contracts (2)	1,169		1,852
Interest rate swap contract (3)	—		3,095
Total Level 2 inputs	157,118		133,617
Total Assets	$	176,306	$	151,706
Liabilities:
Values based on Level 2 inputs:
Deferred compensation plan liabilities (1)	$	178,331	$	148,564
Foreign currency forward contracts (2)	939		1,868

Total Level 2 inputs	179,270		150,432
Total Liabilities	$	179,270	$	150,432

(1)The Company has a deferred compensation plan for the benefit of certain highly compensated officers, managers and other key employees (see Note 15 — Employee Benefits). The assets consist of investments in money market funds, mutual funds and company-owned life insurance contracts. The money market funds consist of cash equivalents while the mutual fund investments consist of publicly-traded and quoted equity shares. The Company considers the fair values of these assets to be based on Level 1 inputs, and such assets had fair values of $19.2 million and $18.1 million as of December 31, 2025 and 2024, respectively. The carrying amounts of the life insurance contracts equal their cash surrender values. Cash surrender value represents the estimated amount that the Company would receive upon termination of a contract, which approximates fair value. The Company considers life insurance contracts to be valued based on Level 2 inputs, and such assets had fair values of $155.9 million and $128.7 million at December 31, 2025 and 2024, respectively. The related deferred compensation plan liabilities are recorded at fair value, or the estimated amount needed to settle the liability, which the Company considers to be a Level 2 input.

(2)The Company enters into foreign currency forward exchange contracts to hedge the effects of adverse fluctuations in foreign currency exchange rates (see Note 13 — Derivatives and Hedging). Valuation of these contracts is based on observable foreign currency exchange rates in active markets, which the Company considers to be a Level 2 input.

(3)Prior to September 30, 2025, the Company had an interest rate swap contract that hedged the risk of variability from interest payments on its borrowings (see Note 6 — Debt). The fair value of the interest rate swap was based on mark-to-market valuations prepared by a third-party broker. Those valuations were based on observable interest rates from recently executed market transactions and other observable market data, which the Company considered to be Level 2 inputs. The Company independently corroborated the reasonableness of the valuations prepared by the third-party broker by using an electronic quotation service.

The table below presents the carrying amounts (net of deferred financing costs and unamortized discounts) and fair values of financial instruments that are not recorded at fair value in the Company’s Consolidated Balance Sheets (in thousands). The estimated fair value of the financial instruments was derived from quoted market prices provided by an independent dealer, which the Company considers to be a Level 2 input.


	Carrying Amount				Fair Value
	December 31,				December 31,
Description	2025		2024		2025		2024
2028 Notes	$	796,563	$	795,296	$	798,080	$	780,544
2029 Notes	596,578		595,669		578,760		558,840
2030 Notes	795,024		794,089		759,224		732,200
2031 Notes	346,564		—		351,869		—
2035 Notes	445,411		—		450,657		—
Total	$	2,980,140	$	2,185,054	$	2,938,590	$	2,071,584

Assets Measured at Fair Value on a Nonrecurring Basis

The Company’s certain long-lived assets, including identifiable intangible assets, goodwill, and right-of-use assets assets are measured at fair value on a nonrecurring basis when there are indicators of impairment. The Company recorded an impairment loss of $150.0 million during the year ended December 31, 2025 related to its Digital Markets reporting unit. See Note 1 — Business and Significant Accounting Policies for additional disclosure related to this impairment charge. The impairment was derived by comparing the fair value of the reporting unit to the carrying value of the reporting unit as of the impairment measurement date, as required under ASC 360 using Level 3 inputs. During the years ended December 31, 2025, 2024 and 2023, the Company recorded impairment charges of $4.8 million, $10.9 million, and $20.4 million, respectively, on right-of-use assets and other long-lived assets primarily related to certain office leases that the Company determined will no longer be used, net of a reduction in the related lease liabilities. The impairments were derived by comparing the fair value of the impacted assets to the carrying value of those assets as of the impairment measurement date, as required under ASC 360 using Level 3 inputs. See Note 7 — Leases for additional discussion related to these impairment charges.

Additionally, see Note 2 — Acquisition and Divestiture for fair value measurements of certain assets and liabilities acquired in business combinations that are recorded at fair value on a nonrecurring basis.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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+ Details

Employee Benefits - Rollforward of Defined Benefit Pension Plans Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Pension plan assets at the beginning of the year	$ 34,931	$ 33,034	$ 27,798
Company contributions	7,920	6,170	5,022
Benefit payments	(4,180)	(2,838)	(1,974)
Actual return on plan assets	1,456	1,021	1,516
Foreign currency impact	4,708	(2,456)	672
Pension plan assets at the end of the year	$ 44,835	$ 34,931	$ 33,034

- Definition

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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+ Details

Income Taxes - Components of Income Tax Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Current tax expense:
U.S. federal	$ 104,476	$ 161,155	$ 171,917
State and local	36,615	48,084	51,441
Foreign	95,788	88,318	107,421
Total current	236,879	297,557	330,779
Deferred tax (benefit) expense:
U.S. federal	(9,578)	(31,708)	(35,457)
State and local	(1,834)	963	(13,475)
Foreign	17,386	(128,291)	(12,845)
Total deferred	5,974	(159,036)	(61,777)
Total current and deferred	242,853	138,521	269,002
Total tax expense	238,887	133,659	264,663
Expense relating to interest rate swaps used to increase equity
Deferred tax (benefit) expense:
Other tax benefit (expense)	(3,405)	(4,695)	(4,976)
Benefit from stock transactions with employees used to increase equity
Deferred tax (benefit) expense:
Other tax benefit (expense)	113	97	105
Benefit (expense) relating to defined-benefit pension adjustments used to increase equity
Deferred tax (benefit) expense:
Other tax benefit (expense)	$ (674)	$ (264)	$ 532

Employee Benefits - Narrative (Details) - USD ($)	12 Months Ended
Employee Benefits - Narrative (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent	4.00%
Maximum annual contribution per employee, amount	$ 7,200
Defined contribution plan cost recognized	58,400,000	$ 57,500,000	$ 56,000,000.0
Compensation expense related to deferred compensation plan	1,300,000	2,300,000	$ 2,800,000
Other assets	10,200,000	8,800,000
Other Assets
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation plan assets	175,100,000	146,800,000
Other liabilities
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation liability	$ 178,300,000	$ 148,600,000

Income Taxes - Current and Long-Term Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Accrued liabilities	$ 110,054	$ 86,831
Operating leases	32,590	41,777
Intangible assets	0	132,292
Property, equipment and leasehold improvements	5,480	11,592
Loss and credit carryforwards	191,660	61,313
Assets relating to equity compensation	40,078	37,247
Other assets	7,547	16,870
Gross deferred tax assets	387,409	387,922
Valuation allowance	(86,787)	(76,285)
Net deferred tax assets	300,622	311,637
Intangible assets	(1,879)	0
Prepaid expenses	(70,155)	(79,559)
Other liabilities	(12,468)	(18,063)
Gross deferred tax liabilities	(84,502)	(97,622)
Net deferred tax assets	$ 216,120	$ 214,015

Segment Information

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

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
	Insights		Conferences		Consulting		Other (1)		Consolidated
Revenues	$	5,072,570	$	644,743	$	552,499	$	227,414	$	6,497,226
Less:
Personnel expenses	1,128,600		73,647		334,762		33,622		1,570,631
Product and content delivery expenses	28,215		229,081		15,518		123,102		395,916
Other expenses (2)	25,570		19,171		15,789		1,933		62,463
Gross contribution	3,890,185		322,844		186,430		68,757		4,468,216
Cost of services and product development - unallocated (3)									24,565
Selling, general and administrative									3,067,631
Depreciation and amortization									200,309

Goodwill impairment									150,000
Interest expenses and other, net									57,593
Income before income taxes									$	968,118


2024
	Insights		Conferences		Consulting		Other (1)		Consolidated
Revenues	$	4,829,051	$	583,224	$	558,537	$	296,599	$	6,267,411
Less:
Personnel expenses	1,080,226		67,326		324,890		45,468		1,517,910
Product and content delivery expenses	27,452		215,664		14,775		152,332		410,223
Other expenses (2)	24,540		18,825		15,580		2,789		61,734
Gross contribution	3,696,833		281,409		203,292		96,010		4,277,544
Cost of services and product development - unallocated (3)									33,155
Selling, general and administrative									2,884,814
Depreciation and amortization									202,315
Acquisition and integration charges									973

Interest expenses and other, net									68,913
Gain on event cancellation insurance claims									(300,000)
Income before income taxes									$	1,387,374


2023
	Insights		Conferences		Consulting		Other (1)		Consolidated
Revenues	$	4,516,035	$	505,164	$	514,746	$	371,011	$	5,906,956
Less:
Personnel expenses	1,023,053		56,708		308,580		48,262		1,436,603
Product and content delivery expenses	29,821		178,675		8,978		163,413		380,887
Other expenses (2)	19,430		16,042		15,687		2,924		54,083
Gross contribution	3,443,731		253,739		181,501		156,412		4,035,383
Cost of services and product development - unallocated (3)									31,667
Selling, general and administrative									2,701,542
Depreciation and amortization									191,103
Acquisition and integration charges									9,587
Gain from sale of divested operation									(135,410)
Interest expenses and other, net									92,842
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).


	2025		2024
Long-lived assets (1):
United States and Canada	$	572,869	$	574,559
Europe, Middle East and Africa	304,606		326,196
Other International	64,483		97,491
Total long-lived assets	$	941,958	$	998,246

(1)Excludes goodwill and intangible assets for all dates.

- 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.

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+ Details

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 729,231	$ 1,253,715	$ 882,466
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	38,248	(26,881)	11,677
Interest rate swaps - net change in deferred gain or loss	9,800	14,362	15,086
Pension plans - net change in deferred actuarial gain or loss	(730)	517	(1,484)
Other comprehensive income (loss), net for the year	47,318	(12,002)	25,279
Comprehensive income	$ 776,549	$ 1,241,713	$ 907,745

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

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+ Details

Revenue and Related Matters - Disaggregation of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 6,497,226	$ 6,267,411	$ 5,906,956
United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	4,032,601	4,017,730	3,911,042
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	1,693,732	1,517,815	1,332,070
Other International
Disaggregation of Revenue [Line Items]
Total revenues	770,893	731,866	663,844
Insights
Disaggregation of Revenue [Line Items]
Total revenues	5,072,570	4,829,051	4,516,035
Insights \| United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	3,117,883	3,077,133	2,973,062
Insights \| Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	1,323,266	1,169,314	1,009,500
Insights \| Other International
Disaggregation of Revenue [Line Items]
Total revenues	631,421	582,604	533,473
Conferences
Disaggregation of Revenue [Line Items]
Total revenues	644,743	583,224	505,164
Conferences \| United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	381,544	354,011	317,531
Conferences \| Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	194,995	165,306	140,640
Conferences \| Other International
Disaggregation of Revenue [Line Items]
Total revenues	68,204	63,907	46,993
Consulting
Disaggregation of Revenue [Line Items]
Total revenues	552,499	558,537	514,746
Consulting \| United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	342,287	343,840	317,645
Consulting \| Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	148,946	142,849	130,471
Consulting \| Other International
Disaggregation of Revenue [Line Items]
Total revenues	61,266	71,848	66,630
Other
Disaggregation of Revenue [Line Items]
Total revenues	227,414	296,599	371,011
Other \| United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	190,887	242,746	302,804
Other \| Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	26,525	40,346	51,459
Other \| Other International
Disaggregation of Revenue [Line Items]
Total revenues	$ 10,002	$ 13,507	$ 16,748

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 1,722,521	$ 1,933,147
Fees receivable, net of allowances of $5,000 and $8,500, respectively	1,684,522	1,696,225
Deferred commissions	400,728	413,914
Prepaid expenses and other current assets	152,205	153,245
Assets held-for-sale	106,361	0
Total current assets	4,066,337	4,196,531
Property, equipment and leasehold improvements, net	214,183	242,968
Operating lease right-of-use assets	213,997	257,419
Goodwill	2,740,802	2,930,205
Intangible assets, net	336,303	409,689
Other assets	513,778	497,859
Total Assets	8,085,400	8,534,671
Current liabilities:
Accounts payable and accrued liabilities	1,236,533	1,206,089
Deferred revenues	2,810,056	2,762,927
Current portion of long-term debt	5,000	0
Liabilities held-for-sale	20,503	0
Total current liabilities	4,072,092	3,969,016
Long-term debt, net of deferred financing fees and discounts	2,976,674	2,459,915
Operating lease liabilities	270,200	339,779
Other liabilities	446,526	406,792
Total Liabilities	7,765,492	7,175,502
Preferred stock:
$0.01 par value, authorized 5,000,000 shares; none issued or outstanding	0	0
Common stock:
$0.0005 par value, 250,000,000 shares authorized; 163,602,067 shares issued for both periods	82	82
Additional paid-in capital	2,679,101	2,497,130
Accumulated other comprehensive loss, net	(41,015)	(88,333)
Accumulated earnings	6,722,238	5,993,007
Treasury stock, at cost, 92,752,769 and 86,222,214 common shares, respectively	(9,040,498)	(7,042,717)
Total Stockholders’ Equity	319,908	1,359,169
Total Liabilities and Stockholders’ Equity	$ 8,085,400	$ 8,534,671

Computation of Earnings Per Share

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Computation of Earnings Per Share

Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of shares of Common Stock outstanding during the period. Diluted EPS reflects the potential dilution of securities that could share in earnings. Potential shares of common stock are excluded from the computation of diluted earnings per share when their effect would be anti-dilutive.

The table below sets forth the calculation of basic and diluted income per share for the years ended December 31 (in thousands, except per share data).


	2025		2024		2023
Numerator:
Net income used for calculating basic and diluted income per share	$	729,231	$	1,253,715	$	882,466
Denominator:
Weighted average common shares used in the calculation of basic income per share	75,355		77,785		79,004
Dilutive effect of outstanding awards associated with stock-based compensation plans	250		553		676
Shares used in the calculation of diluted income per share	75,605		78,338		79,680
Income per share (1):
Basic	$	9.68	$	16.12	$	11.17
Diluted	$	9.65	$	16.00	$	11.08


	Year Ended December 31,
	2025		2024		2023
Anti-dilutive outstanding awards associated with stock-based compensation plans (in millions)	0.3		0.1		0.1
Average market price per share of Common Stock during the year	$	358.33	$	475.66	$	351.31

Fair Value Disclosures - Fair Value of Debt Instruments (Details) - Senior Notes - USD ($) $ in Thousands	Dec. 31, 2025	Nov. 20, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount		$ 799,900
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	$ 2,980,140		$ 2,185,054
Fair Value	2,938,590		2,071,584
2028 Notes \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	796,563		795,296
Fair Value	798,080		780,544
2029 Notes \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	596,578		595,669
Fair Value	578,760		558,840
2030 Notes \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	795,024		794,089
Fair Value	759,224		732,200
2031 Notes \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	346,564		0
Fair Value	351,869		0
2035 Notes \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	445,411		0
Fair Value	$ 450,657		$ 0

Subsequent Events (Details) - USD ($) $ in Thousands	Jan. 29, 2026	Feb. 05, 2026	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024	Dec. 31, 2015
Subsequent Event [Line Items]
Share repurchase program, authorized amount			$ 7,000,000	$ 5,800,000		$ 1,200,000
Stock repurchase program, remaining authorized repurchase amount			700,000
Assets held-for-sale			106,361		$ 0
Liabilities held-for-sale			20,503		$ 0
Disposal Group, Held-for-Sale, Not Discontinued Operations
Subsequent Event [Line Items]
Property, equipment and leasehold improvements			26,300
Digital Markets \| Disposal Group, Held-for-Sale, Not Discontinued Operations
Subsequent Event [Line Items]
Assets held-for-sale			106,400
Liabilities held-for-sale			20,500
Goodwill			49,100
Accounts receivable			25,200
Accounts payable and accrued liabilities			$ 14,200
Subsequent Event
Subsequent Event [Line Items]
Stock repurchase program, additional authorized amount	$ 500,000
Stock repurchase program, remaining authorized repurchase amount	$ 750,000
Subsequent Event \| Digital Markets
Subsequent Event [Line Items]
Sale of business, consideration		$ 110,000

Leases

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Leases

The Company’s leasing activities are primarily for facilities under cancelable and non-cancelable lease agreements expiring during 2026 and through 2038. These facilities support the Company’s executive and administrative activities, insights and consulting, sales, systems support, operations, and other functions. The Company also has leases for office equipment and other assets, which are not significant. Certain of the Company’s lease agreements include (i) renewal options to extend the lease term for up to ten years and/or (ii) options to terminate the agreement within one year. Additionally, certain of the Company’s lease agreements provide standard recurring escalations of lease payments for, among other things, increases in a lessor’s maintenance costs and taxes. Under some lease agreements, the Company may be entitled to allowances, free rent, lessor-financed tenant improvements and other incentives. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants.

The Company subleases certain office space that it does not intend to occupy. Such sublease arrangements expire during 2026 and through 2032 and primarily relate to facilities in Arlington, Virginia. Certain of the Company’s sublease agreements: (i) include renewal and termination options; (ii) provide for customary escalations of lease payments in the normal course of business; and (iii) grant the subtenant certain allowances, free rent, Gartner-financed tenant improvements and other incentives.

Lease Accounting under ASC 842

Under ASC 842, a lease is a contract or an agreement, or a part of another arrangement, between two or more parties that, at its inception, creates enforceable rights and obligations that conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration.

Right-of-use assets represent a right to use an underlying asset for the lease term and the related lease liability represents an obligation to make lease payments pursuant to the contractual terms of the lease agreement. Right-of-use assets and lease liabilities are initially recognized on the lease commencement date based on the present value of the lease payments over the lease term. For all of the Company’s facilities leases, the Company accounts for both lease components and nonlease components (e.g., common area maintenance charges, etc.) as a single lease component when determining the present value of the Company’s lease payments. Variable lease payments that are not dependent on an index or a rate are excluded from the determination of right-of-use assets and lease liabilities and such payments are recognized as expense in the period when the related obligation is incurred.

The Company’s lease agreements do not provide implicit interest rates. Instead, the Company uses an incremental borrowing rate determined on the lease commencement date to calculate the present value of future lease payments. The incremental borrowing rate is calculated for each individual lease and represents the rate of interest that the Company would have to pay to borrow on a collateralized basis (in the currency that the lease is denominated) over a similar term an amount equal to the lease payments in a similar economic environment. Right-of-use assets also include initial direct costs incurred by the Company and lease payments made to a lessor on or before the related lease commencement date, less any lease incentives received directly from the lessor.

Certain of the Company’s facility lease agreements include options to extend or terminate the lease. When it is reasonably certain that the Company will exercise a renewal or termination option, the present value of the lease payments for the affected

lease is adjusted accordingly. Leases with a term of twelve months or less are accounted for in the same manner as long-term lease arrangements, including any related disclosures. Lease expense for operating leases is generally recognized on a straight-line basis over the lease term, unless the related right-of-use asset was previously impaired.

All of the Company’s existing sublease arrangements have been classified as operating leases with sublease income recognized on a straight-line basis over the term of the sublease arrangement. To measure the Company’s periodic sublease income, the Company elected to use a practical expedient under ASC 842 to aggregate nonlease components with the related lease components when (i) the timing and pattern of transfer for the nonlease components and the related lease components are the same and (ii) the lease components, if accounted for separately, would be classified as an operating lease. This practical expedient applies to all of the Company’s existing sublease arrangements.

When the projected lease cost for the term of a sublease exceeds the anticipated sublease income for that same period, the Company treats that circumstance as an indicator that the carrying amount of the related right-of-use asset may not be fully recoverable. In those situations, the Company performs an impairment analysis and, if indicated, the Company records a charge against earnings to reduce the right-of-use asset to the amount deemed to be recoverable in the future.

On the Consolidated Balance Sheet, right-of-use assets are classified and reported in Operating lease right-of-use assets, and the related lease liabilities are included in Accounts payable and accrued liabilities (current) and Operating lease liabilities (long-term). On the Consolidated Statement of Cash Flows, the reduction in the carrying amount of right-of-use assets is presented separately and the change in operating lease liabilities is included under Accounts payable and accrued and other liabilities in the reconciliation of net income to cash provided by operating activities.

All of the Company’s leasing and subleasing activities are recognized in Selling, general and administrative expense in the Consolidated Statements of Operations. The table below presents the Company’s net lease cost and certain other information related to the Company’s leasing activities as of and for the years ended December 31, 2025, 2024 and 2023 (dollars in thousands).


	Year Ended December 31,
Description	2025			2024			2023
Operating lease cost (1)	$	88,016		$	101,897		$	112,948
Variable lease cost (2)	19,110			23,996			22,254
Sublease income	(49,695)			(48,698)			(53,377)
Total lease cost, net (3) (4)	$	57,431		$	77,195		$	81,825

Cash paid for amounts included in the measurement of operating lease liabilities	$	120,897		$	147,672		$	145,226
Cash receipts from sublease arrangements	$	44,758		$	46,245		$	51,968
Right-of-use assets obtained in exchange for new operating lease liabilities	$	22,660		$	28,291		$	12,715

As of December 31,	2025			2024			2023
Weighted average remaining lease term for operating leases (in years)	5.9			6.6			7.3
Weighted average discount rate for operating leases	5.6		%	6.4		%	6.6		%

(1)Included in operating lease cost was $33.4 million, $36.4 million and $43.1 million of costs for subleasing activities during 2025, 2024, and 2023 respectively.

(2)These amounts are primarily variable lease and nonlease costs that were not fixed at the lease commencement date or are dependent on something other than an index or a rate.

(3)The Company capitalized de minimus amounts for initial direct costs for operating leases during 2025 and 2023.

(4)Amount excludes impairment charges of $4.8 million, $10.9 million, and $20.4 million for the years ended December 31, 2025, 2024, and 2023 respectively, as discussed below.


	Operating		Sublease
	Lease		Cash
Period ending December 31,	Payments		Receipts
2026	$	109,239	$	46,268
2027	99,874		46,442
2028	49,822		6,653
2029	39,629		2,921
2030	31,828		2,372
Thereafter	100,412		3,016
Total future minimum operating lease payments and estimated sublease cash receipts (1)	430,804		$	107,672
Imputed interest	(64,528)
Total operating lease liabilities per the Consolidated Balance Sheet	$	366,276

(1)Approximately 74% of the operating lease payments pertain to properties in the United States.

The table below indicates where the discounted operating lease payments from the above table are classified in the Consolidated Balance Sheet (in thousands).


	December 31,
Description	2025		2024
Accounts payable and accrued liabilities	$	96,076	$	100,312
Operating lease liabilities	270,200		339,779
Total operating lease liabilities per the Consolidated Balance Sheet	$	366,276	$	440,091

In connection with the continuing evaluation of its existing real estate portfolio, the Company reviewed certain of its right-of-use assets and related other long-lived assets for impairment under ASC 360. As a result of the evaluation, the Company recognized impairment losses of $4.8 million, $10.9 million and $20.4 million during the years ended December 31, 2025, 2024, and 2023, respectively, which are included as a component of Selling, general and administrative expenses in the accompanying Consolidated Statements of Operations. The impairment loss for the year ended December 31, 2025 includes $2.3 million related to right-of-use assets partially offset by a $1.0 million reduction in lease-related liabilities and $3.5 million related to other long-lived assets, primarily leasehold improvements. The impairment loss for the year ended December 31, 2024 includes $56.7 million related to right-of-use assets partially offset by a $56.1 million reduction in lease liabilities and $10.3 million related to other long-lived assets, primarily leasehold improvements. The impairment loss for the year ended December 31, 2023 includes $14.7 million related to right-of-use assets and $5.7 million related to other long-lived assets, primarily leasehold improvements.

During the fourth quarter of 2024, the Company entered into an amended lease agreement to significantly reduce the square footage and reduce future lease payments at one of its leased locations. The Company made an installment payment of $24.0 million during each of the fourth quarter of 2024 and the second quarter of 2025 in consideration for the lease amendment.

The fair values for the asset groups relating to the impaired long-lived assets were estimated primarily using discounted cash flow models (income approach) with Level 3 inputs. The significant assumptions used in estimating fair value include the expected downtime prior to the commencement of future subleases, projected sublease income over the remaining lease periods and discount rates that reflect the level of risk associated with receiving future cash flows.

Leases

Lease Accounting under ASC 842


	Year Ended December 31,
Description	2025			2024			2023
Operating lease cost (1)	$	88,016		$	101,897		$	112,948
Variable lease cost (2)	19,110			23,996			22,254
Sublease income	(49,695)			(48,698)			(53,377)
Total lease cost, net (3) (4)	$	57,431		$	77,195		$	81,825

Cash paid for amounts included in the measurement of operating lease liabilities	$	120,897		$	147,672		$	145,226
Cash receipts from sublease arrangements	$	44,758		$	46,245		$	51,968
Right-of-use assets obtained in exchange for new operating lease liabilities	$	22,660		$	28,291		$	12,715

As of December 31,	2025			2024			2023
Weighted average remaining lease term for operating leases (in years)	5.9			6.6			7.3
Weighted average discount rate for operating leases	5.6		%	6.4		%	6.6		%

(1)Included in operating lease cost was $33.4 million, $36.4 million and $43.1 million of costs for subleasing activities during 2025, 2024, and 2023 respectively.

(2)These amounts are primarily variable lease and nonlease costs that were not fixed at the lease commencement date or are dependent on something other than an index or a rate.

(3)The Company capitalized de minimus amounts for initial direct costs for operating leases during 2025 and 2023.

(4)Amount excludes impairment charges of $4.8 million, $10.9 million, and $20.4 million for the years ended December 31, 2025, 2024, and 2023 respectively, as discussed below.


	Operating		Sublease
	Lease		Cash
Period ending December 31,	Payments		Receipts
2026	$	109,239	$	46,268
2027	99,874		46,442
2028	49,822		6,653
2029	39,629		2,921
2030	31,828		2,372
Thereafter	100,412		3,016
Total future minimum operating lease payments and estimated sublease cash receipts (1)	430,804		$	107,672
Imputed interest	(64,528)
Total operating lease liabilities per the Consolidated Balance Sheet	$	366,276

(1)Approximately 74% of the operating lease payments pertain to properties in the United States.

The table below indicates where the discounted operating lease payments from the above table are classified in the Consolidated Balance Sheet (in thousands).


	December 31,
Description	2025		2024
Accounts payable and accrued liabilities	$	96,076	$	100,312
Operating lease liabilities	270,200		339,779
Total operating lease liabilities per the Consolidated Balance Sheet	$	366,276	$	440,091

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2025
Audit Information [Abstract]
Auditor Name	KPMG LLP
Auditor Location	New York, NY
Auditor Firm ID	185

Revenue and Related Matters - Revenue Remaining Performance Obligation (Details) $ in Billions	Dec. 31, 2025 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 6.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 3.9
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 2.0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 0.5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year

Business and Significant Accounting Policies - Property, Equipment and Leasehold Improvements, Less Accumulated Depreciation and Amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property, equipment and leasehold improvements, gross	$ 610,304	$ 648,839
Less — accumulated depreciation and amortization	(396,121)	(405,871)
Property, equipment and leasehold improvements, net	214,183	242,968
Computer Equipment And Software
Property, Plant and Equipment [Line Items]
Property, equipment and leasehold improvements, gross	$ 345,968	387,362
Computer Equipment And Software \| Minimum
Property, Plant and Equipment [Line Items]
Useful Life	2 years
Computer Equipment And Software \| Maximum
Property, Plant and Equipment [Line Items]
Useful Life	7 years
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, equipment and leasehold improvements, gross	$ 72,462	71,026
Furniture and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Furniture and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful Life	8 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, equipment and leasehold improvements, gross	$ 191,874	$ 190,451
Leasehold improvements \| Minimum
Property, Plant and Equipment [Line Items]
Useful Life	2 years
Leasehold improvements \| Maximum
Property, Plant and Equipment [Line Items]
Useful Life	15 years

Accounts Payable and Accrued and Other Liabilities - Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Payables and Accruals [Abstract]
Accounts payable	$ 49,778	$ 55,793
Payroll and employee benefits payable	284,238	247,043
Bonus payable	298,295	291,484
Commissions payable	179,416	184,861
Income tax payable	51,256	38,690
VAT payable	76,926	64,501
Current portion of operating lease liabilities	96,076	100,312
Other accrued liabilities	200,548	223,405
Total accounts payable and accrued liabilities	$ 1,236,533	$ 1,206,089
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total accounts payable and accrued liabilities	Total accounts payable and accrued liabilities

Stock-Based Compensation - Schedule of Changes in RSUs Outstanding (Details) - Restricted stock units shares in Millions	12 Months Ended
	Dec. 31, 2025 $ / shares shares
Restricted Stock Units (RSUs)
Outstanding, Beginning Balance (in shares)	0.9
Granted (in shares)	0.3
Vested and released (in shares)	(0.4)
Outstanding, Ending Balance (in shares)	0.8
Per Share Weighted Average Grant Date Fair Value
Outstanding, Beginning Balance (in dollars per share) \| $ / shares	$ 352.89
Granted (in dollars per share) \| $ / shares	530.62
Vested and released (in dollars per share) \| $ / shares	316.46
Outstanding, Ending Balance (in dollars per share) \| $ / shares	$ 433.83
Weighted average remaining contractual term	1 year 1 month 6 days
Performance-based RSUs
Restricted Stock Units (RSUs)
Granted (in shares)	0.1
Minimum \| Performance-based RSUs
Per Share Weighted Average Grant Date Fair Value
Target performance percentage	0.00%
Maximum \| Performance-based RSUs
Per Share Weighted Average Grant Date Fair Value
Target performance percentage	200.00%
Executives \| Performance-based RSUs
Restricted Stock Units (RSUs)
Granted (in shares)	0.1
Non-executive employees \| Service-based Awards
Restricted Stock Units (RSUs)
Granted (in shares)	0.2

Segment Information (Tables)

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

The tables below present information about the Company’s reportable segments for the years ended December 31 (in thousands).


2025
	Insights		Conferences		Consulting		Other (1)		Consolidated
Revenues	$	5,072,570	$	644,743	$	552,499	$	227,414	$	6,497,226
Less:
Personnel expenses	1,128,600		73,647		334,762		33,622		1,570,631
Product and content delivery expenses	28,215		229,081		15,518		123,102		395,916
Other expenses (2)	25,570		19,171		15,789		1,933		62,463
Gross contribution	3,890,185		322,844		186,430		68,757		4,468,216
Cost of services and product development - unallocated (3)									24,565
Selling, general and administrative									3,067,631
Depreciation and amortization									200,309

Goodwill impairment									150,000
Interest expenses and other, net									57,593
Income before income taxes									$	968,118


2024
	Insights		Conferences		Consulting		Other (1)		Consolidated
Revenues	$	4,829,051	$	583,224	$	558,537	$	296,599	$	6,267,411
Less:
Personnel expenses	1,080,226		67,326		324,890		45,468		1,517,910
Product and content delivery expenses	27,452		215,664		14,775		152,332		410,223
Other expenses (2)	24,540		18,825		15,580		2,789		61,734
Gross contribution	3,696,833		281,409		203,292		96,010		4,277,544
Cost of services and product development - unallocated (3)									33,155
Selling, general and administrative									2,884,814
Depreciation and amortization									202,315
Acquisition and integration charges									973

Interest expenses and other, net									68,913
Gain on event cancellation insurance claims									(300,000)
Income before income taxes									$	1,387,374


2023
	Insights		Conferences		Consulting		Other (1)		Consolidated
Revenues	$	4,516,035	$	505,164	$	514,746	$	371,011	$	5,906,956
Less:
Personnel expenses	1,023,053		56,708		308,580		48,262		1,436,603
Product and content delivery expenses	29,821		178,675		8,978		163,413		380,887
Other expenses (2)	19,430		16,042		15,687		2,924		54,083
Gross contribution	3,443,731		253,739		181,501		156,412		4,035,383
Cost of services and product development - unallocated (3)									31,667
Selling, general and administrative									2,701,542
Depreciation and amortization									191,103
Acquisition and integration charges									9,587
Gain from sale of divested operation									(135,410)
Interest expenses and other, net									92,842
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.

Schedule of Revenue from External Customers and Long-Lived Assets by Geographical Areas


	2025		2024
Long-lived assets (1):
United States and Canada	$	572,869	$	574,559
Europe, Middle East and Africa	304,606		326,196
Other International	64,483		97,491
Total long-lived assets	$	941,958	$	998,246

(1)Excludes goodwill and intangible assets for all dates.

Other Assets

12 Months Ended

Dec. 31, 2025

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other Assets

The Company’s other assets are summarized in the table below (in thousands).


	December 31,
	2025		2024
Benefit plan-related assets	$	185,370	$	155,998
Non-current deferred tax assets	245,434		262,757
Other	82,974		79,104
Total other assets	$	513,778	$	497,859

Business and Significant Accounting Policies

12 Months Ended

Dec. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Business and Significant Accounting Policies

Business. Gartner, Inc. (NYSE: IT) delivers actionable, objective business and technology insights that drive smarter decisions and stronger performance on an organization’s mission-critical priorities.

We are a trusted advisor and an objective resource for over 13,000 enterprises in approximately 90 countries and territories — across all major functions, in every industry and enterprise size.

Segments. Gartner delivers its products and services globally through three reportable segments – Business and Technology Insights (or “Insights”), Conferences, and Consulting. Note 9 — Revenue and Related Matters and Note 16 — Segment Information describe the products and services offered by each of our segments and provide additional financial information for those segments. In the second quarter of 2025, we renamed our segment previously referred to as Research to Business and Technology Insights (or “Insights”) to reflect the nature of the value we provide to clients. In the third quarter of 2025, we changed the structure of our internal organization and concluded that Gartner Digital Markets (“Digital Markets”) was an operating segment but does not meet the criteria of a reportable segment. Accordingly, Digital Markets results are now included in “Other” where segment information is provided. Digital Markets was previously included in our Insights segment. Prior periods have been recast to conform to current period presentation.

Basis of presentation. The accompanying Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”), as defined in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), for financial information and with the applicable instructions of U.S. Securities and Exchange Commission (“SEC”) Regulation S-X.

The fiscal year of Gartner is the twelve-month period from January 1 through December 31. All references to 2025, 2024 and 2023 herein refer to the fiscal year unless otherwise indicated. When used in these notes, the terms “Gartner,” the “Company,” “we,” “us” or “our” refer to Gartner, Inc. and its consolidated subsidiaries.

Principles of consolidation. The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated.

Use of estimates. The preparation of the accompanying Consolidated Financial Statements requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenues and expenses. Such estimates include the valuation of fees receivable, goodwill, intangible assets, deferred tax assets and other long-lived assets, as well as tax accruals and other liabilities. In addition, estimates are used in revenue recognition, income tax expense or benefit, performance-based compensation charges, depreciation and amortization. Management believes its use of estimates in the accompanying Consolidated Financial Statements to be reasonable.

Management continually evaluates and revises its estimates using historical experience and other factors, including the general economic environment and actions it may take in the future. Management adjusts these estimates when facts and circumstances dictate. However, these estimates may involve significant uncertainties and judgments and cannot be determined with precision. In addition, these estimates are based on management’s best judgment at a point in time. As a result, differences between our estimates and actual results could be material and would be reflected in the Company’s Consolidated Financial Statements in future periods.

Business acquisitions. The Company accounts for business acquisitions in accordance with the acquisition method of accounting as prescribed by FASB ASC Topic 805. The acquisition method of accounting requires the Company to record the assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date, with certain exceptions. Any excess of the consideration transferred over the estimated fair value of the net assets acquired, including identifiable intangible assets, is recorded as goodwill. Under the acquisition method, the operating results of acquired companies are included in the Company’s Consolidated Financial Statements beginning on the date of acquisition. The Company completed business acquisitions in 2023 and 2022. Note 2 — Acquisition and Divestiture provides additional information regarding those business acquisitions.

The determination of the fair values of intangible and other assets acquired in an acquisition requires management judgment and the consideration of a number of factors, including the historical financial performance of acquired businesses and their

projected future performance, and estimates surrounding customer turnover, as well as assumptions regarding the level of competition and the costs necessary to reproduce certain assets. Establishing the useful lives of intangible assets also requires management judgment and the evaluation of a number of factors, including the expected use of an asset, historical client retention rates, consumer awareness and trade name history, as well as any contractual provisions that could limit or extend an asset’s useful life.

Charges that are directly related to the Company’s acquisitions are expensed as incurred and classified as Acquisition and integration charges in the Consolidated Statements of Operations. Note 2 — Acquisition and Divestiture provides additional information regarding the Company’s Acquisition and integration charges.

Revenue recognition. The Company’s revenue by significant source is accounted for as follows:

•Insights revenues are mainly derived from subscription contracts for insights products. The related revenues are deferred and recognized ratably over the applicable contract term.

•Conferences revenues are deferred and recognized upon the completion of the related conference or meeting.

•Consulting revenues are principally generated from fixed fee or time and materials engagements. Revenues from fixed fee contracts are recognized as the Company works to satisfy its performance obligations. Revenues from time and materials engagements are recognized as work is delivered and/or services are provided. Revenues related to contract optimization engagements are contingent in nature and are only recognized upon satisfaction of all conditions related to their payment.

The majority of the Company’s Insights contracts are billable upon signing, absent special terms granted on a limited basis from time to time. Insights contracts are generally non-cancellable and non-refundable, except for government contracts that may have cancellation or fiscal funding clauses. When a subscription contract is invoiced, the Company records the billable amount as a fee receivable, representing its legally enforceable right to payment. The corresponding amount is recognized as deferred revenue until the underlying services are provided and control is transferred to the customer. In certain instances, the Company may have satisfied its performance obligations and earned revenue prior to invoicing the customer. In such cases, the Company records an unbilled receivable, which represents its right to payment for services already delivered but not yet billed. Fees derived from assisting organizations in selecting the right business software for their needs are recognized when the leads are provided to vendors. Note 9 — Revenue and Related Matters provides additional information regarding the Company’s business and revenues.

Allowance for losses. The Company estimates uncollectible amounts on its fees receivable using a historical loss rate method.

Cost of services and product development (“COS”). COS expense includes the direct costs incurred in the creation and delivery of the Company’s products and services. These costs primarily relate to personnel.

Selling, general and administrative (“SG&A”). SG&A expense includes direct and indirect selling costs, general and administrative costs, facility costs and bad debt expense.

Commission expense. The Company records deferred commissions upon the recognition of commission liabilities, which is generally aligned with the obtaining of a customer contract or the commencement of subsequent terms in the case of multi-year contracts. The deferred amount is amortized over a period that aligns with the transfer to the customer of the services to which the commissions relate. Note 9 — Revenue and Related Matters provides additional information regarding deferred commissions and the amortization of such costs.

Stock-based compensation expense. The Company accounts for stock-based compensation awards in accordance with FASB ASC Topics 505 and 718 and SEC Staff Accounting Bulletins No. 107 and No. 110. Stock-based compensation expense for equity awards is based on the fair value of the award on the date of grant. The Company recognizes stock-based compensation expense over the period that the related service is performed, which is generally the same as the vesting period of the underlying award. Forfeitures are recognized as they occur. A change in any of the terms or conditions of stock-based compensation awards is accounted for as a modification of the award. Incremental compensation cost is measured as the excess, if any, of the fair value of the modified award over the fair value of the original award immediately before its terms are modified, as measured on the modification date. For vested awards, the Company recognizes incremental compensation cost in the period the modification occurs. For unvested awards, the Company recognizes any incremental compensation expense at the modification date or ratably over the requisite remaining service period, as appropriate. If the fair value of the modified award is lower than the fair value of the original award immediately before modification, the minimum compensation cost the

Company recognizes is the cost of the original award. Note 10 — Stock-Based Compensation provides additional information regarding the Company’s stock-based compensation activity.

Income taxes. The Company uses the asset and liability method of accounting for income taxes. The Company estimates its income taxes in each of the jurisdictions where it operates. This process involves estimating the Company’s current tax expense or benefit together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included in the Consolidated Balance Sheets. When assessing the realizability of deferred tax assets, the Company considers if it is more likely than not that some or all of the deferred tax assets will not be realized. In making this assessment, the Company considers the availability of loss carryforwards, projected reversals of deferred tax liabilities, projected future taxable income, and ongoing prudent and feasible tax planning strategies. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained based on the technical merits of the position. Recognized tax positions are measured at the largest amount of benefit with greater than a 50% likelihood of being realized. The Company uses estimates in determining the amount of unrecognized tax benefits associated with uncertain tax positions. Significant judgment is required in evaluating tax law and measuring the benefits likely to be realized. Uncertain tax positions are periodically re-evaluated and adjusted as more information about their ultimate realization becomes available. Note 12 — Income Taxes provides additional information regarding the Company’s income taxes.

Cash and cash equivalents and restricted cash. Cash and cash equivalents includes cash and all highly liquid investments with original maturities of three months or less, which are considered to be cash equivalents. The carrying value of cash equivalents approximates fair value due to the short-term maturity of such instruments. Investments with maturities of more than three months are classified as marketable securities. Interest earned is recorded in Interest income in the Consolidated Statements of Operations.

U.S. GAAP requires that amounts generally described as restricted cash and restricted cash equivalents be presented with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts presented on an entity’s statement of cash flows. Below is a table presenting the beginning-of-period and end-of-period cash amounts from the Company’s Consolidated Balance Sheets and the total cash amounts presented in the Consolidated Statements of Cash Flows (in thousands).


	December 31,
	2025		2024		2023		2022
Cash and cash equivalents	$	1,722,521	$	1,933,147	$	1,318,999	$	697,999
Restricted cash classified in (1):
Prepaid expenses and other current assets	—		—		600		—
Other assets	—		—		—		600
Cash and cash equivalents and restricted cash per the Consolidated Statements of Cash Flows	$	1,722,521	$	1,933,147	$	1,319,599	$	698,599

Leases. FASB ASC Topic 842 (“ASC 842”) requires accounting for leases under a right-of-use model whereby a lessee must record a right-of-use asset and a related lease liability on its balance sheet for most of its leases. Under ASC 842, leases are classified as either operating or finance arrangements, with such classification affecting the pattern of expense recognition in an entity’s income statement. For operating leases, ASC 842 requires recognition in an entity’s income statement of a single lease cost, calculated so that the cost of the lease is allocated over the lease term, generally on a straight-line basis. In connection with the continuing evaluation of its existing real estate portfolio, the Company reviewed certain of its right-of-use assets and related other long-lived assets for impairment under FASB ASC Topic 360 (“ASC 360”). As a result of the evaluation, the Company recognized impairment losses of $4.8 million, $10.9 million, and $20.4 million during the years ended December 31, 2025, 2024 and 2023, respectively. Note 7 — Leases provides additional information regarding the Company’s leases.

Property, equipment and leasehold improvements. Equipment, leasehold improvements and other fixed assets owned by the Company are recorded at cost less accumulated depreciation and amortization. Fixed assets, other than leasehold improvements, are depreciated using the straight-line method over the estimated useful life of the underlying asset. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful life of the improvement or the remaining

term of the related lease. Depreciation and amortization expense for fixed assets was $118.0 million, $112.1 million and $98.6 million in 2025, 2024 and 2023, respectively. Property, equipment and leasehold improvements, net are presented in the table below (in thousands).


	Useful Life	December 31,
Category	(Years)	2025		2024
Computer equipment and software	2 - 7	$	345,968	$	387,362
Furniture and equipment	3 - 8	72,462		71,026
Leasehold improvements	2 - 15	191,874		190,451
Total cost		610,304		648,839
Less — accumulated depreciation and amortization		(396,121)		(405,871)
Property, equipment and leasehold improvements, net		$	214,183	$	242,968

The Company incurs costs to develop internal-use software used in its operations. Certain of those costs that meet the criteria in FASB ASC Topic 350 are capitalized and amortized over future periods. Net capitalized internal-use software development costs were $101.8 million and $122.0 million at December 31, 2025 and 2024, respectively, and are included in Computer equipment and software in the table above. Amortization expense for capitalized internal-use software development costs, which is included with Depreciation in the Consolidated Statements of Operations, totaled $68.4 million, $60.1 million and $47.8 million in 2025, 2024 and 2023, respectively.

Goodwill. Goodwill represents the excess of the purchase price of acquired businesses over the estimated fair values of the tangible and identifiable intangible net assets acquired. Evaluations of the recoverability of goodwill are performed in accordance with FASB ASC Topic 350, which requires an annual assessment of potential goodwill impairment at the reporting unit level and whenever events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable.

When performing the annual assessment of the recoverability of goodwill, the Company initially performs a qualitative analysis evaluating whether any events or circumstances occurred or exist that provide evidence that it is more likely than not that the fair value of any of the Company’s reporting units is less than the related carrying amount. If the Company does not believe that it is more likely than not that the fair value of any of the Company’s reporting units is less than the related carrying amount, then no quantitative impairment test is performed. However, if the results of the qualitative assessment indicate that it is more likely than not that the fair value of a reporting unit is less than its respective carrying amount, then the Company performs a quantitative impairment test. Evaluating the recoverability of goodwill requires judgments and assumptions regarding future trends and events. As a result, both the precision and reliability of management estimates are subject to uncertainty.

The Company’s most recent annual impairment test of goodwill was a quantitative analysis conducted during the quarter ended September 30, 2025 that indicated an impairment of the Company’s Digital Markets reporting unit. During the three months ended September 30, 2025, ongoing weakness in the market as well as changes in the Company’s internal organization structure prompted a revision to the long-term earnings forecast for the Digital Markets business. During the year end ended December 31, 2025, a goodwill impairment loss of $150.0 million was recognized in the Digital Markets reporting unit. The fair value of that reporting unit was estimated using a combination of the expected present value of future cash flows and market approach. Subsequent to completing the 2025 annual impairment test, no events or changes in circumstances were noted that required an interim goodwill impairment test. Note 3 — Goodwill and Intangible Assets provides additional information regarding the Company’s goodwill.

Finite-lived intangible assets. The Company has finite-lived intangible assets that are amortized using the straight-line method over the expected useful life of the underlying asset. Note 3 — Goodwill and Intangible Assets provides additional information regarding the Company’s finite-lived intangible assets.

Impairment of long-lived assets. The Company’s long-lived assets primarily consist of intangible assets other than goodwill, right-of-use assets and property, equipment and leasehold improvements. The Company reviews its long-lived asset groups for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or an asset group may not be recoverable. Such evaluation may be based on a number of factors, including current and projected operating results and cash flows, and changes in management’s strategic direction as well as external economic and market factors. The Company evaluates the recoverability of assets and asset groups by determining whether their carrying values can be recovered through undiscounted future operating cash flows. If events or circumstances indicate that the carrying values might not be recoverable based on undiscounted future operating cash flows, an impairment loss may be recognized. The amount of impairment is

measured based on the difference between the projected discounted future operating cash flows, using a discount rate reflecting the Company’s average cost of funds, and the carrying value of the asset or asset group.

Debt. The Company presents amounts borrowed in the Consolidated Balance Sheets, net of deferred financing fees. Interest accrued on amounts borrowed is recorded as Interest expense in the Consolidated Statements of Operations. Note 6 — Debt provides additional information regarding the Company’s debt arrangements.

Foreign currency exposure. The functional currency of the Company’s foreign subsidiaries is typically the local currency. All assets and liabilities of foreign subsidiaries are translated into U.S. dollars at exchange rates in effect at the balance sheet date. Income and expense items are translated at average exchange rates throughout the year. The resulting translation adjustments are recorded as foreign currency translation adjustments, a component of Accumulated other comprehensive loss, net within Stockholders’ Equity on the Consolidated Balance Sheets.

Currency transaction gains or losses arising from transactions denominated in currencies other than the functional currency of a subsidiary are recognized in results of operations as part of Other income, net in the Consolidated Statements of Operations. The Company had net currency transaction gains / (losses) of $6.0 million, $(6.9) million and $(6.0) million in 2025, 2024 and 2023, respectively. The Company enters into foreign currency forward exchange contracts to mitigate the effects of adverse fluctuations in foreign currency exchange rates on certain transactions. Those contracts generally have short durations and are recorded at fair value with both realized and unrealized gains and losses recorded in Other income, net. The net (loss) / gain from foreign currency forward exchange contracts was $(3.4) million, $2.5 million and $1.9 million in 2025, 2024 and 2023, respectively. Note 13 — Derivatives and Hedging provides additional information regarding the Company’s foreign currency forward exchange contracts.

Fair value disclosures. The Company has a limited number of assets and liabilities that are adjusted to fair value at each balance sheet date. The Company’s required fair value disclosures are provided at Note 14 — Fair Value Disclosures.

Concentrations of credit risk. Assets that may subject the Company to concentration of credit risk consist primarily of short-term, highly liquid investments classified as cash equivalents, fees receivable, contract assets, interest rate swaps and a pension reinsurance asset. The majority of the Company’s cash equivalent investments and its interest rate swap contracts are with investment grade commercial banks. Fees receivable and contract asset balances deemed to be collectible from customers have limited concentration of credit risk due to the Company’s diverse customer base and geographic dispersion. The Company’s pension reinsurance asset (see Note 15 — Employee Benefits) is maintained with a large international insurance company that was rated investment grade as of December 31, 2025 and 2024.

Stock repurchase programs. The Company records the cost to repurchase shares of its own common stock as treasury stock. Shares repurchased by the Company are added to treasury shares and are not retired. Note 8 — Stockholders’ Equity provides additional information regarding the Company’s common stock repurchase activity.

Gain on event cancellation insurance claims. During the year ended December 31, 2024, the Company received $300.0 million in proceeds from a settlement agreement to resolve litigation concerning the Company's event cancellation insurance for 2020 and 2021. The settlement resolved all remaining 2020 and 2021 event cancellation insurance claims. The Company received $3.1 million in proceeds during the year ended December 31, 2023 related to 2020 conference cancellation insurance claims. The Company does not record any gain on insurance claims in excess of expenses incurred until the receipt of the insurance proceeds is deemed to be realizable.

Adoption of new accounting standard. The Company adopted the accounting standard described below during 2025.

Income Taxes— In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures (“ASU No. 2023-09”). The amendments in this ASU are expected to enhance the transparency and decision usefulness of income tax disclosures. ASU 2023-09 requires entities to enhance income tax disclosures primarily related to the rate reconciliation and income taxes paid information. Companies will need to disaggregate the disclosure of income taxes paid (net of refunds received) by federal, state, and foreign taxes on an annual basis. Additionally, on an annual basis, companies would disclose income taxes paid disaggregated by individual jurisdiction using a quantitative threshold of 5% of total income taxes paid. Public business entities would also be required to provide, on an annual basis, rate reconciliation information by specific categories, including state and local income tax, the effect of cross-border tax laws, foreign tax effects, changes in prior year unrecognized tax benefits, and tax credits, among others. Additionally, some categories would then require disaggregation based on a quantitative threshold of 5%. The foreign tax effect category requires disaggregation by both jurisdiction and nature. The ASU also requires additional qualitative disclosures. All public entities will be required to report income tax information in accordance with the new guidance starting in annual periods beginning after December 15, 2024. The Company adopted ASU 2023-09 effective with the 2025 10-K and the adoption only impacted its disclosures with no impacts to the Company's results of operations, cash flows, or financial condition. The Company has elected prospective adoption of ASU No. 2023-09.

Accounting standards issued but not yet adopted. The FASB has issued accounting standards that have not yet become effective as of December 31, 2025 and may impact the Company’s Consolidated Financial Statements or related disclosures in future periods. The standards and their potential impacts are discussed below.

Income Statement— In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income- Expense Disaggregation Disclosures (“ASU No. 2024-03”). The amendments in this ASU are expected to improve the disclosures about a public business entity’s expenses and address requests from investors for more detailed information about the types of expenses (including employee compensation, depreciation and amortization) in commonly presented expense captions (such as cost of sales, SG&A and research and development). ASU 2024-03 will require a quantitative disclosure of the components of each income statement line item (e.g., cost of services and product development and selling, general and administrative expenses). It will also require entities to disclose the total amount of selling expenses, and, on an annual basis, an entity’s definition of selling expenses. The amendments are effective for annual periods with fiscal years beginning after December 15, 2026, and interim periods in fiscal years beginning after December 15, 2027. The Company expects this ASU to only impact its disclosures with no impacts to the Company's results of operations, cash flows, or financial condition.

Credit Losses— In July 2025, the FASB issued ASU 2025-05, Financial Instruments – Credit Losses (Topic 326). The amendments in this ASU introduce a practical expedient for all entities related to applying Subtopic 326-20 to current accounts receivable and current contact assets arising from transactions accounted for under Topic 606. In developing reasonable and supportable forecasts as part of estimating expected credit losses, all entities may elect a practical expedient that assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. The amendments are expected to provide decision-useful information to investors and other financial statement users while reducing the time and effort necessary to analyze and estimate credit losses for current accounts receivable and current contract assets. The amendments will be effective for annual reporting periods beginning after December 15, 2025, and interim reporting periods within those annual reporting periods. Early adoption is permitted in both interim and annual reporting periods in which financial statements have not yet been issued or made available for issuance. The Company expects this ASU will not have a material impact to the Company's results of operations, cash flows, or financial condition.

Internal-use Software— In September 2025, the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal Use Software (Subtopic 350-40). The amendments in this ASU remove all references to project stages, and requires entities to start capitalizing software costs when (1) management has authorized and committed to funding the software project and (2) it is probable that the project will be completed and the software will be used to perform the function intended. The amendments are effective for annual periods with fiscal years beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. The Company expects this ASU will not have a material impact to the Company's results of operations, cash flows, or financial condition.

Stock-Based Compensation - Weighted-Average Assumptions Used to Determine Fair Value of SARs Grants on Date of Grant Using Black-Scholes-Merton Valuation Model (Details) - Stock appreciation rights	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Expected stock price volatility	29.00%	36.00%	35.00%
Risk-free interest rate	4.30%	4.10%	3.90%
Expected life	4 years 6 months 29 days	4 years 8 months 1 day	4 years 8 months 15 days

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Derivatives and Hedging

12 Months Ended

Dec. 31, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging

The Company enters into a limited number of derivative contracts to mitigate the cash flow risk associated with changes in interest rates on variable-rate debt and changes in foreign exchange rates on forecasted foreign currency transactions. The Company accounts for its outstanding derivative contracts in accordance with FASB ASC Topic 815, which requires all derivatives, including derivatives designated as accounting hedges, to be recorded on the balance sheet at fair value. The tables below provide information regarding the Company’s outstanding derivative contracts as of the dates indicated (in thousands, except for number of contracts).

December 31, 2025

Derivative Contract Type

Number of
Contracts

Notional
Amounts

Fair Value
Asset
(Liability), Net (3)

Balance Sheet
Line Item

Foreign currency forwards (1)

104

427,482

230

Other current assets

December 31, 2024


Derivative Contract Type	Number of Contracts	Notional Amounts		Fair Value Asset (Liability), Net (3)		Balance Sheet Line Item	Unrealized Loss Recorded in AOCI/L
Interest rate swaps (2)	1	$	350,000	$	3,095	Other current assets	$	(9,800)
Foreign currency forwards (1)	119	656,904		(16)		Other current liabilities	—
Total	120	$	1,006,904	$	3,079		$	(9,800)

(3)See Note 14 — Fair Value Disclosures for the determination of the fair values of these instruments.

At December 31, 2025, all of the Company’s derivative counterparties were investment grade financial institutions. The Company did not have any collateral arrangements with its derivative counterparties and none of the derivative contracts contained credit-risk related contingent features. The table below provides information regarding amounts recognized in the Consolidated Statements of Operations for derivative contracts for the years ended December 31 (in thousands).


Amount Recorded In	2025		2024		2023
Interest expense (1)	$	13,205	$	19,056	$	20,062
Other expense (income), net (2)	2,911		(6,380)		(5,836)
Total expense, net	$	16,116	$	12,676	$	14,226

(1)Consists of interest expense from interest rate swap contracts.

(2)Consists of net realized and unrealized gains and losses on foreign currency forward contracts, gains and losses on de-designated interest rate swaps.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

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-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 5C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-5C

+ Details

Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2025

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured to Fair Value on Recurring Basis



	December 31,
Description	2025		2024
Assets:
Values based on Level 1 inputs:
Deferred compensation plan assets (1)	$	19,188	$	18,089
Total Level 1 inputs	19,188		18,089
Values based on Level 2 inputs:
Deferred compensation plan assets (1)	155,949		128,670
Foreign currency forward contracts (2)	1,169		1,852
Interest rate swap contract (3)	—		3,095
Total Level 2 inputs	157,118		133,617
Total Assets	$	176,306	$	151,706
Liabilities:
Values based on Level 2 inputs:
Deferred compensation plan liabilities (1)	$	178,331	$	148,564
Foreign currency forward contracts (2)	939		1,868

Total Level 2 inputs	179,270		150,432
Total Liabilities	$	179,270	$	150,432

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments


	Carrying Amount				Fair Value
	December 31,				December 31,
Description	2025		2024		2025		2024
2028 Notes	$	796,563	$	795,296	$	798,080	$	780,544
2029 Notes	596,578		595,669		578,760		558,840
2030 Notes	795,024		794,089		759,224		732,200
2031 Notes	346,564		—		351,869		—
2035 Notes	445,411		—		450,657		—
Total	$	2,980,140	$	2,185,054	$	2,938,590	$	2,071,584

Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2025

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Summary of Valuation Allowance

The table below summarizes the activity in the Company’s allowance for losses for the years ended December 31 (in thousands).


	Balance at Beginning of Year		Additions Charged to Expense		Deductions from the Reserve		Balance at End of Year
2025	$	8,500	$	(1,000)	$	(2,500)	$	5,000
2024	$	9,000	$	5,000	$	(5,500)	$	8,500
2023	$	9,000	$	7,200	$	(7,200)	$	9,000

Revenue and Related Matters - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Assets:
Fees receivable, gross	$ 1,689,522	$ 1,704,725
Contract assets recorded in Prepaid expenses and other current assets	40,534	31,056
Contract liabilities:
Deferred revenues (current liability)	2,810,056	2,762,927
Non-current deferred revenues recorded in Other liabilities	31,569	27,389
Total contract liabilities	$ 2,841,625	$ 2,790,316

Employee Benefits - Components of Net Periodic Pension Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	$ 7,255	$ 6,765	$ 5,363
Interest cost	$ 3,101	$ 2,520	$ 2,173
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income, net	Other income, net	Other income, net
Expected return on plan assets	$ (1,509)	$ (1,213)	$ (1,132)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income, net	Other income, net	Other income, net
Recognition of actuarial loss	$ 262	$ 262	$ 171
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income, net	Other income, net	Other income, net
Other	$ 0	$ 0	$ (638)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Other Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income, net	Other income, net	Other income, net
Total defined benefit pension plan expense	$ 9,109	$ 8,334	$ 5,937

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss, Net	Accumulated Earnings	Treasury Stock
Beginning Balance at Dec. 31, 2022	$ 227,798	$ 82	$ 2,179,604	$ (101,610)	$ 3,856,826	$ (5,707,104)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	882,466				882,466
Other comprehensive (loss) income	25,279			25,279
Issuances under stock plans	25,212		10,844			14,368
Common share repurchases (including excise tax)	(609,962)					(609,962)
Stock-based compensation expense	129,841		129,841
Ending Balance at Dec. 31, 2023	680,634	82	2,320,289	(76,331)	4,739,292	(6,302,698)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,253,715				1,253,715
Other comprehensive (loss) income	(12,002)			(12,002)
Issuances under stock plans	28,284		22,057			6,227
Common share repurchases (including excise tax)	(746,246)					(746,246)
Stock-based compensation expense	154,784		154,784
Ending Balance at Dec. 31, 2024	1,359,169	82	2,497,130	(88,333)	5,993,007	(7,042,717)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	729,231				729,231
Other comprehensive (loss) income	47,318			47,318
Issuances under stock plans	32,564		26,094			6,470
Common share repurchases (including excise tax)	(2,004,251)					(2,004,251)
Stock-based compensation expense	155,877		155,877
Ending Balance at Dec. 31, 2025	$ 319,908	$ 82	$ 2,679,101	$ (41,015)	$ 6,722,238	$ (9,040,498)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References + Details

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

+ References

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+ Details

Segment Information - Reconciliation of Segment Gross Contribution to Net Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	$ 6,497,226	$ 6,267,411	$ 5,906,956
Personnel expenses	1,570,631	1,517,910	1,436,603
Product and content delivery expenses	395,916	410,223	380,887
Other expenses	62,463	61,734	54,083
Gross contribution	4,468,216	4,277,544	4,035,383
Cost of services and product development - unallocated	24,565	33,155	31,667
Selling, general and administrative	3,067,631	2,884,814	2,701,542
Depreciation and amortization	200,309	202,315	191,103
Acquisition and integration charges	0	973	9,587
Goodwill impairment	150,000	0	0
Gain from sale of divested operation	0	0	(135,410)
Interest expenses and other, net	57,593	68,913	92,842
Gain on event cancellation insurance claims	0	(300,000)	(3,077)
Income before income taxes	$ 968,118	$ 1,387,374	$ 1,147,129
Maximum
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Percent of target bonus charges allocated to segments	100.00%	100.00%	100.00%
Insights
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	$ 5,072,570	$ 4,829,051	$ 4,516,035
Goodwill impairment	0
Conferences
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	644,743	583,224	505,164
Goodwill impairment	0
Consulting
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	552,499	558,537	514,746
Goodwill impairment	0
Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	227,414	296,599	371,011
Goodwill impairment	150,000
Operating Segments \| Insights
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	5,072,570	4,829,051	4,516,035
Personnel expenses	1,128,600	1,080,226	1,023,053
Product and content delivery expenses	28,215	27,452	29,821
Other expenses	25,570	24,540	19,430
Gross contribution	3,890,185	3,696,833	3,443,731
Operating Segments \| Conferences
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	644,743	583,224	505,164
Personnel expenses	73,647	67,326	56,708
Product and content delivery expenses	229,081	215,664	178,675
Other expenses	19,171	18,825	16,042
Gross contribution	322,844	281,409	253,739
Operating Segments \| Consulting
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	552,499	558,537	514,746
Personnel expenses	334,762	324,890	308,580
Product and content delivery expenses	15,518	14,775	8,978
Other expenses	15,789	15,580	15,687
Gross contribution	186,430	203,292	181,501
Operating Segments \| Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	227,414	296,599	371,011
Personnel expenses	33,622	45,468	48,262
Product and content delivery expenses	123,102	152,332	163,413
Other expenses	1,933	2,789	2,924
Gross contribution	$ 68,757	$ 96,010	$ 156,412

Business and Significant Accounting Policies (Policies)	12 Months Ended
Business and Significant Accounting Policies (Policies)	Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Segments	Segments. Gartner delivers its products and services globally through three reportable segments – Business and Technology Insights (or “Insights”), Conferences, and Consulting. Note 9 — Revenue and Related Matters and Note 16 — Segment Information describe the products and services offered by each of our segments and provide additional financial information for those segments. In the second quarter of 2025, we renamed our segment previously referred to as Research to Business and Technology Insights (or “Insights”) to reflect the nature of the value we provide to clients. In the third quarter of 2025, we changed the structure of our internal organization and concluded that Gartner Digital Markets (“Digital Markets”) was an operating segment but does not meet the criteria of a reportable segment. Accordingly, Digital Markets results are now included in “Other” where segment information is provided. Digital Markets was previously included in our Insights segment. Prior periods have been recast to conform to current period presentation.
Basis of presentation	Basis of presentation. The accompanying Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”), as defined in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), for financial information and with the applicable instructions of U.S. Securities and Exchange Commission (“SEC”) Regulation S-X. The fiscal year of Gartner is the twelve-month period from January 1 through December 31. All references to 2025, 2024 and 2023 herein refer to the fiscal year unless otherwise indicated. When used in these notes, the terms “Gartner,” the “Company,” “we,” “us” or “our” refer to Gartner, Inc. and its consolidated subsidiaries.
Principles of consolidation	Principles of consolidation. The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated.
Use of estimates	Use of estimates. The preparation of the accompanying Consolidated Financial Statements requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenues and expenses. Such estimates include the valuation of fees receivable, goodwill, intangible assets, deferred tax assets and other long-lived assets, as well as tax accruals and other liabilities. In addition, estimates are used in revenue recognition, income tax expense or benefit, performance-based compensation charges, depreciation and amortization. Management believes its use of estimates in the accompanying Consolidated Financial Statements to be reasonable. Management continually evaluates and revises its estimates using historical experience and other factors, including the general economic environment and actions it may take in the future. Management adjusts these estimates when facts and circumstances dictate. However, these estimates may involve significant uncertainties and judgments and cannot be determined with precision. In addition, these estimates are based on management’s best judgment at a point in time. As a result, differences between our estimates and actual results could be material and would be reflected in the Company’s Consolidated Financial Statements in future periods.
Business acquisitions	Business acquisitions. The Company accounts for business acquisitions in accordance with the acquisition method of accounting as prescribed by FASB ASC Topic 805. The acquisition method of accounting requires the Company to record the assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date, with certain exceptions. Any excess of the consideration transferred over the estimated fair value of the net assets acquired, including identifiable intangible assets, is recorded as goodwill. Under the acquisition method, the operating results of acquired companies are included in the Company’s Consolidated Financial Statements beginning on the date of acquisition. The Company completed business acquisitions in 2023 and 2022. Note 2 — Acquisition and Divestiture provides additional information regarding those business acquisitions. The determination of the fair values of intangible and other assets acquired in an acquisition requires management judgment and the consideration of a number of factors, including the historical financial performance of acquired businesses and their projected future performance, and estimates surrounding customer turnover, as well as assumptions regarding the level of competition and the costs necessary to reproduce certain assets. Establishing the useful lives of intangible assets also requires management judgment and the evaluation of a number of factors, including the expected use of an asset, historical client retention rates, consumer awareness and trade name history, as well as any contractual provisions that could limit or extend an asset’s useful life. Charges that are directly related to the Company’s acquisitions are expensed as incurred and classified as Acquisition and integration charges in the Consolidated Statements of Operations.
Revenue recognition	Revenue recognition. The Company’s revenue by significant source is accounted for as follows: •Insights revenues are mainly derived from subscription contracts for insights products. The related revenues are deferred and recognized ratably over the applicable contract term. •Conferences revenues are deferred and recognized upon the completion of the related conference or meeting. •Consulting revenues are principally generated from fixed fee or time and materials engagements. Revenues from fixed fee contracts are recognized as the Company works to satisfy its performance obligations. Revenues from time and materials engagements are recognized as work is delivered and/or services are provided. Revenues related to contract optimization engagements are contingent in nature and are only recognized upon satisfaction of all conditions related to their payment. The majority of the Company’s Insights contracts are billable upon signing, absent special terms granted on a limited basis from time to time. Insights contracts are generally non-cancellable and non-refundable, except for government contracts that may have cancellation or fiscal funding clauses. When a subscription contract is invoiced, the Company records the billable amount as a fee receivable, representing its legally enforceable right to payment. The corresponding amount is recognized as deferred revenue until the underlying services are provided and control is transferred to the customer. In certain instances, the Company may have satisfied its performance obligations and earned revenue prior to invoicing the customer. In such cases, the Company records an unbilled receivable, which represents its right to payment for services already delivered but not yet billed.
Allowance for losses	Allowance for losses. The Company estimates uncollectible amounts on its fees receivable using a historical loss rate method.
Cost of services and product development	Cost of services and product development (“COS”). COS expense includes the direct costs incurred in the creation and delivery of the Company’s products and services. These costs primarily relate to personnel.
Selling, general and administrative	Selling, general and administrative (“SG&A”). SG&A expense includes direct and indirect selling costs, general and administrative costs, facility costs and bad debt expense.
Commission expense	Commission expense. The Company records deferred commissions upon the recognition of commission liabilities, which is generally aligned with the obtaining of a customer contract or the commencement of subsequent terms in the case of multi-year contracts. The deferred amount is amortized over a period that aligns with the transfer to the customer of the services to which the commissions relate.
Stock-based compensation expense	Stock-based compensation expense. The Company accounts for stock-based compensation awards in accordance with FASB ASC Topics 505 and 718 and SEC Staff Accounting Bulletins No. 107 and No. 110. Stock-based compensation expense for equity awards is based on the fair value of the award on the date of grant. The Company recognizes stock-based compensation expense over the period that the related service is performed, which is generally the same as the vesting period of the underlying award. Forfeitures are recognized as they occur. A change in any of the terms or conditions of stock-based compensation awards is accounted for as a modification of the award. Incremental compensation cost is measured as the excess, if any, of the fair value of the modified award over the fair value of the original award immediately before its terms are modified, as measured on the modification date. For vested awards, the Company recognizes incremental compensation cost in the period the modification occurs. For unvested awards, the Company recognizes any incremental compensation expense at the modification date or ratably over the requisite remaining service period, as appropriate. If the fair value of the modified award is lower than the fair value of the original award immediately before modification, the minimum compensation cost the Company recognizes is the cost of the original award.
Income taxes	Income taxes. The Company uses the asset and liability method of accounting for income taxes. The Company estimates its income taxes in each of the jurisdictions where it operates. This process involves estimating the Company’s current tax expense or benefit together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included in the Consolidated Balance Sheets. When assessing the realizability of deferred tax assets, the Company considers if it is more likely than not that some or all of the deferred tax assets will not be realized. In making this assessment, the Company considers the availability of loss carryforwards, projected reversals of deferred tax liabilities, projected future taxable income, and ongoing prudent and feasible tax planning strategies. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained based on the technical merits of the position. Recognized tax positions are measured at the largest amount of benefit with greater than a 50% likelihood of being realized. The Company uses estimates in determining the amount of unrecognized tax benefits associated with uncertain tax positions. Significant judgment is required in evaluating tax law and measuring the benefits likely to be realized. Uncertain tax positions are periodically re-evaluated and adjusted as more information about their ultimate realization becomes available.
Cash and cash equivalents and restricted cash	Cash and cash equivalents and restricted cash. Cash and cash equivalents includes cash and all highly liquid investments with original maturities of three months or less, which are considered to be cash equivalents. The carrying value of cash equivalents approximates fair value due to the short-term maturity of such instruments. Investments with maturities of more than three months are classified as marketable securities. Interest earned is recorded in Interest income in the Consolidated Statements of Operations.
Leases	Leases. FASB ASC Topic 842 (“ASC 842”) requires accounting for leases under a right-of-use model whereby a lessee must record a right-of-use asset and a related lease liability on its balance sheet for most of its leases. Under ASC 842, leases are classified as either operating or finance arrangements, with such classification affecting the pattern of expense recognition in an entity’s income statement. For operating leases, ASC 842 requires recognition in an entity’s income statement of a single lease cost, calculated so that the cost of the lease is allocated over the lease term, generally on a straight-line basis. In connection with the continuing evaluation of its existing real estate portfolio, the Company reviewed certain of its right-of-use assets and related other long-lived assets for impairment under FASB ASC Topic 360 (“ASC 360”). As a result of the evaluation, the Company recognized impairment losses of $4.8 million, $10.9 million, and $20.4 million during the years ended December 31, 2025, 2024 and 2023, respectively. Note 7 — Leases provides additional information regarding the Company’s leases.
Property, equipment and leasehold improvements	Property, equipment and leasehold improvements. Equipment, leasehold improvements and other fixed assets owned by the Company are recorded at cost less accumulated depreciation and amortization. Fixed assets, other than leasehold improvements, are depreciated using the straight-line method over the estimated useful life of the underlying asset. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful life of the improvement or the remaining term of the related lease.
Goodwill	Goodwill. Goodwill represents the excess of the purchase price of acquired businesses over the estimated fair values of the tangible and identifiable intangible net assets acquired. Evaluations of the recoverability of goodwill are performed in accordance with FASB ASC Topic 350, which requires an annual assessment of potential goodwill impairment at the reporting unit level and whenever events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. When performing the annual assessment of the recoverability of goodwill, the Company initially performs a qualitative analysis evaluating whether any events or circumstances occurred or exist that provide evidence that it is more likely than not that the fair value of any of the Company’s reporting units is less than the related carrying amount. If the Company does not believe that it is more likely than not that the fair value of any of the Company’s reporting units is less than the related carrying amount, then no quantitative impairment test is performed. However, if the results of the qualitative assessment indicate that it is more likely than not that the fair value of a reporting unit is less than its respective carrying amount, then the Company performs a quantitative impairment test. Evaluating the recoverability of goodwill requires judgments and assumptions regarding future trends and events. As a result, both the precision and reliability of management estimates are subject to uncertainty. The Company’s most recent annual impairment test of goodwill was a quantitative analysis conducted during the quarter ended September 30, 2025 that indicated an impairment of the Company’s Digital Markets reporting unit. During the three months ended September 30, 2025, ongoing weakness in the market as well as changes in the Company’s internal organization structure prompted a revision to the long-term earnings forecast for the Digital Markets business. During the year end ended December 31, 2025, a goodwill impairment loss of $150.0 million was recognized in the Digital Markets reporting unit. The fair value of that reporting unit was estimated using a combination of the expected present value of future cash flows and market approach. Subsequent to completing the 2025 annual impairment test, no events or changes in circumstances were noted that required an interim goodwill impairment test. Note 3 — Goodwill and Intangible Assets provides additional information regarding the Company’s goodwill.
Finite-lived intangible assets	Finite-lived intangible assets. The Company has finite-lived intangible assets that are amortized using the straight-line method over the expected useful life of the underlying asset.
Impairment of long-lived assets	Impairment of long-lived assets. The Company’s long-lived assets primarily consist of intangible assets other than goodwill, right-of-use assets and property, equipment and leasehold improvements. The Company reviews its long-lived asset groups for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or an asset group may not be recoverable. Such evaluation may be based on a number of factors, including current and projected operating results and cash flows, and changes in management’s strategic direction as well as external economic and market factors. The Company evaluates the recoverability of assets and asset groups by determining whether their carrying values can be recovered through undiscounted future operating cash flows. If events or circumstances indicate that the carrying values might not be recoverable based on undiscounted future operating cash flows, an impairment loss may be recognized. The amount of impairment is measured based on the difference between the projected discounted future operating cash flows, using a discount rate reflecting the Company’s average cost of funds, and the carrying value of the asset or asset group.
Debt	Debt. The Company presents amounts borrowed in the Consolidated Balance Sheets, net of deferred financing fees. Interest accrued on amounts borrowed is recorded as Interest expense in the Consolidated Statements of Operations.
Foreign currency exposure	Foreign currency exposure. The functional currency of the Company’s foreign subsidiaries is typically the local currency. All assets and liabilities of foreign subsidiaries are translated into U.S. dollars at exchange rates in effect at the balance sheet date. Income and expense items are translated at average exchange rates throughout the year. The resulting translation adjustments are recorded as foreign currency translation adjustments, a component of Accumulated other comprehensive loss, net within Stockholders’ Equity on the Consolidated Balance Sheets. Currency transaction gains or losses arising from transactions denominated in currencies other than the functional currency of a subsidiary are recognized in results of operations as part of Other income, net in the Consolidated Statements of Operations.
Fair value disclosures	Fair value disclosures. The Company has a limited number of assets and liabilities that are adjusted to fair value at each balance sheet date.
Concentrations of credit risk	Concentrations of credit risk. Assets that may subject the Company to concentration of credit risk consist primarily of short-term, highly liquid investments classified as cash equivalents, fees receivable, contract assets, interest rate swaps and a pension reinsurance asset. The majority of the Company’s cash equivalent investments and its interest rate swap contracts are with investment grade commercial banks. Fees receivable and contract asset balances deemed to be collectible from customers have limited concentration of credit risk due to the Company’s diverse customer base and geographic dispersion. The Company’s pension reinsurance asset (see Note 15 — Employee Benefits) is maintained with a large international insurance company that was rated investment grade as of December 31, 2025 and 2024.
Stock repurchase programs	Stock repurchase programs. The Company records the cost to repurchase shares of its own common stock as treasury stock. Shares repurchased by the Company are added to treasury shares and are not retired. Note 8 — Stockholders’ Equity provides additional information regarding the Company’s common stock repurchase activity.
Adoption of new accounting standard	Adoption of new accounting standard. The Company adopted the accounting standard described below during 2025. Income Taxes— In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures (“ASU No. 2023-09”). The amendments in this ASU are expected to enhance the transparency and decision usefulness of income tax disclosures. ASU 2023-09 requires entities to enhance income tax disclosures primarily related to the rate reconciliation and income taxes paid information. Companies will need to disaggregate the disclosure of income taxes paid (net of refunds received) by federal, state, and foreign taxes on an annual basis. Additionally, on an annual basis, companies would disclose income taxes paid disaggregated by individual jurisdiction using a quantitative threshold of 5% of total income taxes paid. Public business entities would also be required to provide, on an annual basis, rate reconciliation information by specific categories, including state and local income tax, the effect of cross-border tax laws, foreign tax effects, changes in prior year unrecognized tax benefits, and tax credits, among others. Additionally, some categories would then require disaggregation based on a quantitative threshold of 5%. The foreign tax effect category requires disaggregation by both jurisdiction and nature. The ASU also requires additional qualitative disclosures. All public entities will be required to report income tax information in accordance with the new guidance starting in annual periods beginning after December 15, 2024. The Company adopted ASU 2023-09 effective with the 2025 10-K and the adoption only impacted its disclosures with no impacts to the Company's results of operations, cash flows, or financial condition. The Company has elected prospective adoption of ASU No. 2023-09. Accounting standards issued but not yet adopted. The FASB has issued accounting standards that have not yet become effective as of December 31, 2025 and may impact the Company’s Consolidated Financial Statements or related disclosures in future periods. The standards and their potential impacts are discussed below. Income Statement— In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income- Expense Disaggregation Disclosures (“ASU No. 2024-03”). The amendments in this ASU are expected to improve the disclosures about a public business entity’s expenses and address requests from investors for more detailed information about the types of expenses (including employee compensation, depreciation and amortization) in commonly presented expense captions (such as cost of sales, SG&A and research and development). ASU 2024-03 will require a quantitative disclosure of the components of each income statement line item (e.g., cost of services and product development and selling, general and administrative expenses). It will also require entities to disclose the total amount of selling expenses, and, on an annual basis, an entity’s definition of selling expenses. The amendments are effective for annual periods with fiscal years beginning after December 15, 2026, and interim periods in fiscal years beginning after December 15, 2027. The Company expects this ASU to only impact its disclosures with no impacts to the Company's results of operations, cash flows, or financial condition. Credit Losses— In July 2025, the FASB issued ASU 2025-05, Financial Instruments – Credit Losses (Topic 326). The amendments in this ASU introduce a practical expedient for all entities related to applying Subtopic 326-20 to current accounts receivable and current contact assets arising from transactions accounted for under Topic 606. In developing reasonable and supportable forecasts as part of estimating expected credit losses, all entities may elect a practical expedient that assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. The amendments are expected to provide decision-useful information to investors and other financial statement users while reducing the time and effort necessary to analyze and estimate credit losses for current accounts receivable and current contract assets. The amendments will be effective for annual reporting periods beginning after December 15, 2025, and interim reporting periods within those annual reporting periods. Early adoption is permitted in both interim and annual reporting periods in which financial statements have not yet been issued or made available for issuance. The Company expects this ASU will not have a material impact to the Company's results of operations, cash flows, or financial condition. Internal-use Software— In September 2025, the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal Use Software (Subtopic 350-40). The amendments in this ASU remove all references to project stages, and requires entities to start capitalizing software costs when (1) management has authorized and committed to funding the software project and (2) it is probable that the project will be completed and the software will be used to perform the function intended. The amendments are effective for annual periods with fiscal years beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. The Company expects this ASU will not have a material impact to the Company's results of operations, cash flows, or financial condition.

Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
Leases - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Renewal term			10 years
Option to terminate, term			1 year
Loss on impairment of lease related assets, net			$ 4,766	$ 10,909	$ 20,368
Decrease in operating lease liability			1,000	56,100
Operating lease, installment payment			120,897	147,672	145,226
Right-of-use assets
Lessee, Lease, Description [Line Items]
Loss on impairment of lease related assets, net			2,300	56,700	14,700
Leasehold improvements
Lessee, Lease, Description [Line Items]
Loss on impairment of lease related assets, net			3,500	10,300	5,700
Leaseholds and Leasehold Improvements
Lessee, Lease, Description [Line Items]
Operating lease, installment payment	$ 24,000	$ 24,000
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Loss on impairment of lease related assets, net			$ 4,800	$ 10,900	$ 20,400

Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 8,500	$ 9,000	$ 9,000
Additions Charged to Expense	(1,000)	5,000	7,200
Deductions from the Reserve	(2,500)	(5,500)	(7,200)
Balance at End of Year	$ 5,000	$ 8,500	$ 9,000

Debt - Borrowings (Details) - USD ($) $ in Thousands		12 Months Ended
Debt - Borrowings (Details) - USD ($) $ in Thousands	Mar. 26, 2024	Dec. 31, 2025	Nov. 20, 2025	Dec. 31, 2024	Jun. 18, 2021	Sep. 28, 2020	Jun. 22, 2020
Debt Instrument [Line Items]
Principal amount outstanding		$ 3,005,000		$ 2,479,400
Less: deferred financing fees and unamortized discounts		(23,326)		(19,485)
Net balance sheet carrying amount		$ 2,981,674		2,459,915
Weighted average effective rate		4.66%
Unsecured Debt \| Revolving Credit Facility \| 2024 Credit Agreement
Debt Instrument [Line Items]
Principal amount outstanding		$ 0		274,400
Remaining borrowing capacity		$ 1,000,000
Debt instrument term	5 years
Debt instrument, fixed interest rate		4.00%
Senior Notes \| 2028 Notes
Debt Instrument [Line Items]
Principal amount outstanding		$ 800,000		$ 800,000
Debt instrument, fixed interest rate		4.50%		4.50%			4.50%
Senior Notes \| 2029 Notes
Debt Instrument [Line Items]
Principal amount outstanding		$ 600,000		$ 600,000
Debt instrument, fixed interest rate		3.63%		3.63%	3.625%
Senior Notes \| 2030 Notes
Debt Instrument [Line Items]
Principal amount outstanding		$ 800,000		$ 800,000
Debt instrument, fixed interest rate		3.75%		3.75%		3.75%
Senior Notes \| 2031 Notes
Debt Instrument [Line Items]
Principal amount outstanding		$ 350,000		$ 0
Debt instrument, fixed interest rate		4.95%	4.95%	4.95%
Senior Notes \| 2035 Notes
Debt Instrument [Line Items]
Principal amount outstanding		$ 450,000		$ 0
Debt instrument, fixed interest rate		5.60%	5.60%	5.60%
Other
Debt Instrument [Line Items]
Principal amount outstanding		$ 5,000		$ 5,000
Connecticut Economic Development Program \| Economic Development Loan 2
Debt Instrument [Line Items]
Debt instrument term		10 years
Debt instrument, fixed interest rate		1.75%

Income Taxes

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Income Taxes

Below is a summary of the components of the Company’s income before income taxes for the years ended December 31 (in thousands).


	2025		2024		2023
U.S.	$	302,391	$	629,656	$	574,458
Non-U.S.	665,727		757,718		572,671
Income before income taxes	$	968,118	$	1,387,374	$	1,147,129

The components of the expense (benefit) for income taxes on the above income are summarized in the table below (in thousands).


	2025		2024		2023
Current tax expense:
U.S. federal	$	104,476	$	161,155	$	171,917
State and local	36,615		48,084		51,441
Foreign	95,788		88,318		107,421
Total current	236,879		297,557		330,779
Deferred tax (benefit) expense:
U.S. federal	(9,578)		(31,708)		(35,457)
State and local	(1,834)		963		(13,475)
Foreign	17,386		(128,291)		(12,845)
Total deferred	5,974		(159,036)		(61,777)
Total current and deferred	242,853		138,521		269,002
Expense relating to interest rate swaps used to increase equity	(3,405)		(4,695)		(4,976)
Benefit from stock transactions with employees used to increase equity	113		97		105
Benefit (expense) relating to defined-benefit pension adjustments used to increase equity	(674)		(264)		532
Total tax expense	$	238,887	$	133,659	$	264,663

The components of long-term deferred tax assets (liabilities) are summarized in the table below (in thousands).


	December 31,
	2025		2024
Accrued liabilities	$	110,054	$	86,831
Operating leases	32,590		41,777
Intangible assets	—		132,292
Property, equipment and leasehold improvements	5,480		11,592
Loss and credit carryforwards	191,660		61,313
Assets relating to equity compensation	40,078		37,247
Other assets	7,547		16,870
Gross deferred tax assets	387,409		387,922
Valuation allowance	(86,787)		(76,285)
Net deferred tax assets	300,622		311,637

Intangible assets	(1,879)		—
Prepaid expenses	(70,155)		(79,559)
Other liabilities	(12,468)		(18,063)
Gross deferred tax liabilities	(84,502)		(97,622)
Net deferred tax assets	$	216,120	$	214,015

Net deferred tax assets and net deferred tax liabilities were $245.4 million and $29.3 million as of December 31, 2025, respectively, and $262.8 million and $48.7 million as of December 31, 2024, respectively. These amounts are reported in Other assets and Other liabilities in the Consolidated Balance Sheets. Management has concluded it is more likely than not that the reversal of deferred tax liabilities and results of future operations will generate sufficient taxable income to realize the deferred tax assets, net of the valuation allowance at December 31, 2025.

In December 2024, the Company completed an intercompany transfer of certain intellectual property. As a result, the Company recorded a deferred tax asset of approximately $163.2 million which represents the value of future tax deductions for amortization of the assets in the acquiring jurisdiction. A portion of the tax amortization was recognized initially in 2024. Subsequently the full amount of tax amortization was taken in respect of this intellectual property. The deferred tax asset for intangible assets was reduced for the impact of this tax amortization, with the offset reflected as an increase in the deferred tax

asset for loss carryforwards. These amounts have been reduced for associated unrecognized tax benefits, consistent with FASB ASC Topic 740 (“ASC 740”). The fair value of the intellectual property was determined using an income approach based on unobservable inputs and involves significant judgments such as, but not limited to, future cash flows and discount rates. Management’s estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates.

The valuation allowances of $86.8 million and $76.3 million as of December 31, 2025 and 2024, respectively, primarily related to tax basis in certain intangible assets and loss and credit carryovers that are not likely to be realized.

As of December 31, 2025, the Company had state and local tax net operating loss carryforwards of $8.2 million, of which $3.5 million expires within six to fifteen years and $4.7 million expires within sixteen years to twenty years. The Company also had state tax credits of $5.0 million, a majority of which will expire in five to six years. As of December 31, 2025, the Company had non-U.S. net operating loss carryforwards of $3.1 billion, that can be carried forward indefinitely. In addition, the Company also had foreign tax credit carryforwards of $29.3 million, a majority of which will expire between 2029 and 2035. These amounts have been reduced for associated unrecognized tax benefits, consistent with ASC 740.


	2025
U.S. federal statutory tax rate	$	203,305	21.0	%
U.S. federal:
Goodwill impairment	23,560		2.4
Global intangible low-taxed income, net of foreign tax credits	10,865		1.1
Other cross border tax laws	6,372		0.7
Nontaxable or nondeductible items	(152)		—
Tax credits	(4,000)		(0.4)
Change in the valuation allowance	3,050		0.3
Other	(15,099)		(1.6)
State and local income tax, net of federal (national) income tax effect (1)	26,174		2.7
Foreign tax effects:
Ireland
Statutory rate difference between Ireland and United States	(19,967)		(2.1)
Other	(757)		(0.1)
Malta
Statutory rate difference between Malta and United States	(35,315)		(3.6)
Other	(635)		—
Other foreign jurisdictions	34,961		3.6
Changes in unrecognized tax benefits	6,525		0.7
Effective tax rate	$	238,887	24.7	%

(1)State and local income taxes in California, Florida, New York, and Virginia make up the majority (greater than 50 percent) of the tax effects in this category.


	2024		2023
Statutory tax rate	21.0	%	21.0	%
State income taxes, net of federal benefit	2.2		2.1
Effect of non-U.S. operations	(3.0)		(0.4)
Intercompany sale of intellectual property	(11.8)		—
Net activity in unrecognized tax benefits	2.0		1.3
Stock-based compensation expense	(3.3)		(3.1)
Limitation on executive compensation	2.4		2.3
Global intangible low-taxed income, net of foreign tax credits	1.1		1.2
Foreign-derived intangible income	—		(0.3)
Change in the valuation allowance	(0.1)		(1.2)
Other items, net	(0.9)		0.2
Effective tax rate	9.6	%	23.1	%

As noted above, in December 2024, the Company completed an intercompany transfer of certain intellectual property. As a result, the Company recorded net tax benefits of approximately $161.9 million. The benefit represents the value of future tax deductions for amortization of the assets in the acquiring jurisdiction, net of any tax recognized by the selling jurisdiction. The Company’s intellectual property footprint continues to evolve and may result in tax rate volatility in the future.

As of December 31, 2025, 2024, and 2023, the Company had gross unrecognized tax benefits of $301.6 million, $257.5 million, and $148.4 million respectively. The increases in 2025 and 2024 are primarily due to positions taken with respect to certain intercompany transactions and tax credits. The gross unrecognized tax benefits at December 31, 2025 related primarily to transfer pricing on intercompany transactions, the exclusion of stock-based compensation expense from the Company’s cost sharing agreement, and the ability to realize certain refund claims.

Included in the balance of gross unrecognized tax benefits at December 31, 2025 are potential benefits of $295.7 million that, if recognized, would reduce our effective tax rate on income from continuing operations. Also included in the balance of gross unrecognized tax benefits at December 31, 2025 are potential benefits of $5.9 million that, if recognized, would result in adjustments to other tax accounts, primarily deferred taxes.

The table below is a reconciliation of the beginning and ending amounts of gross unrecognized tax benefits, excluding interest and penalties, for the years ended December 31 (in thousands).


	2025		2024		2023
Beginning balance	$	257,533	$	148,390	$	137,227
Additions based on tax positions related to the current year	41,465		116,373		22,822
Reductions based on tax positions related to current year	—		—		—
Additions for tax positions of prior years	4,888		7,925		4,361
Reductions for tax positions of prior years	(130)		(888)		(14)
Reductions for expiration of statutes	(7,911)		(10,573)		(15,625)
Settlements	—		—		(441)
Change in foreign currency exchange rates	5,737		(3,694)		60
Ending balance	$	301,582	$	257,533	$	148,390

The Company accrues interest and penalties related to gross unrecognized tax benefits in its income tax provision. As of December 31, 2025, 2024 and 2023, the Company had $25.9 million, $21.1 million and $17.4 million, respectively, of accrued interest and penalties related to gross unrecognized tax benefits. These amounts are in addition to the gross unrecognized tax benefits disclosed above. The total amount of interest and penalties recognized in the income tax provision during 2025 and 2024 was $4.3 million and $5.0 million, respectively.

The number of years with open statutes of limitation varies depending on the tax jurisdiction. The Company’s statutes are open with respect to the U.S. federal jurisdiction for 2022 and forward, India for 2006 and forward, Ireland for 2019 and forward,

and Malta for 2024 and forward. For other major taxing jurisdictions, including U.S. state and local, Saudi Arabia, Germany, United Kingdom, Australia and Netherlands the Company's statutes vary and are open as far back as 2015.

On July 4, 2025, the One Big Beautiful Bill Act (the “OBBBA”) was enacted in the U.S. The OBBBA includes significant provisions, such as the permanent extension of certain expiring provisions of the Tax Cuts and Jobs Act, modifications to the international tax framework and the restoration of favorable tax treatment for certain business provisions. The legislation has multiple effective dates, with certain provisions effective in 2025 and others implemented through 2027. OBBBA did not have a material impact on the Company’s consolidated financial results in the current period. The Company is currently assessing and will continue to assess and reflect the impact of OBBBA on its future consolidated financial statements as appropriate.

The Organization for Economic Co-operation and Development (“the OECD”) has issued various proposals that would change long-standing global tax principles. These proposals include a two-pillar approach to global taxation, focusing on global profit allocation and a 15% global corporate minimum tax rate. In January 2026 the OECD issued guidance regarding the 'side-by-side' safe harbor agreement, which is intended to provide relief for U.S. headquartered entities from certain provisions of the global minimum tax framework.

Several countries in which the Company does business have proposed or enacted new laws or are actively considering changes to their tax laws to align with OECD proposals. Significant details around the provisions are still uncertain as the OECD and participating countries continue to work on defining the underlying rules and administrative procedures. The Company will continue to monitor and reflect the impact of such legislative changes in future financial statements as appropriate. The minimum tax has been treated as a current cost since 2024 and does not have a significant impact on the Company’s effective tax rate for the current period.

Under U.S. GAAP, no provision for income taxes that may result from the remittance of earnings held overseas is required if the Company has the ability and intent to indefinitely reinvest such funds overseas. The Company continues to assert its intention to reinvest all accumulated undistributed foreign earnings in its non-U.S. operations, except in instances where the repatriation of those earnings would result in minimal additional tax. Consequently, the Company has not recognized income tax expense that would result from the remittance of those earnings. The accumulated undistributed earnings of non-U.S. subsidiaries that have not been previously taxed were approximately $107.3 million as of December 31, 2025.

The following table summarizes income taxes paid, net of refunds received, for the year ended December 31 (in thousands).


	2025
US federal	$	95,586
US state and local	28,595
Foreign
United Kingdom	14,157
Other	71,219
Total Foreign	85,376
Total income taxes, net of refunds received	$	209,557

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
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-URI https://asc.fasb.org/1943274/2147480990/946-20-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
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-Subparagraph (SX 210.4-08(h)(2))
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/740/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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-URI https://asc.fasb.org/1943274/2147482685/740-10-50-14

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-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147482685/740-10-50-21

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

Accounts Payable and Accrued and Other Liabilities - Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Payables and Accruals [Abstract]
Non-current deferred revenues	$ 31,569	$ 27,389
Long-term taxes payable	149,765	122,126
Benefit plan-related liabilities	215,286	183,720
Non-current deferred tax liabilities	29,314	48,742
Other	20,592	24,815
Total other liabilities	$ 446,526	$ 406,792

Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Schedule of Transactions Relating to Common Stock

The table below summarizes transactions relating to the Company’s common stock for the three years ended December 31, 2025.


	Issued Shares	Treasury Stock Shares
Balance at December 31, 2022	163,602,067	84,428,513
Issuances under stock plans	—	(975,745)
Purchases for treasury (1)	—	1,811,758
Balance at December 31, 2023	163,602,067	85,264,526
Issuances under stock plans	—	(666,193)
Purchases for treasury (1)	—	1,623,881
Balance at December 31, 2024	163,602,067	86,222,214
Issuances under stock plans	—	(511,759)
Purchases for treasury (1)	—	7,042,314
Balance at December 31, 2025	163,602,067	92,752,769

(1)The Company used a total of $2.0 billion, $0.7 billion and $0.6 billion in cash for share repurchases during 2025, 2024 and 2023, respectively.

Schedule of Changes in Accumulated Other Comprehensive Loss by Component (Net of Tax)

The tables below provide information about the changes in AOCI/L by component and the related amounts reclassified out of AOCI/L to income during the years indicated (net of tax, in thousands) (1).

Year Ended December 31, 2025


	Interest Rate Swaps		Defined Benefit Pension Plans		Foreign Currency Translation Adjustments		Total
Balance - December 31, 2024	$	(9,800)	$	(5,214)	$	(73,319)	$	(88,333)
Other comprehensive income (loss) activity during the year:
Change in AOCI/L before reclassifications to income	—		(930)		38,248		37,318
Reclassifications from AOCI/L to income (2), (3)	9,800		200		—		10,000
Other comprehensive income (loss), net for the year	9,800		(730)		38,248		47,318
Balance - December 31, 2025	$	—	$	(5,944)	$	(35,071)	$	(41,015)

Year Ended December 31, 2024


	Interest Rate Swaps		Defined Benefit Pension Plans		Foreign Currency Translation Adjustments		Total
Balance - December 31, 2023	$	(24,162)	$	(5,731)	$	(46,438)	$	(76,331)
Other comprehensive income (loss) activity during the year:
Change in AOCI/L before reclassifications to income	—		315		(26,881)		(26,566)
Reclassifications from AOCI/L to income (2), (3)	14,362		202		—		14,564
Other comprehensive income (loss), net for the year	14,362		517		(26,881)		(12,002)
Balance - December 31, 2024	$	(9,800)	$	(5,214)	$	(73,319)	$	(88,333)

(1)Amounts in parentheses represent debits (deferred losses).

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27))
-SubTopic 10
-Topic 210
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-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Paragraph 1
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-10

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-8

Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-7

+ Details

Leases - Net Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
Leases - Net Lease Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease cost	$ 88,016	$ 101,897	$ 112,948
Variable lease cost	19,110	23,996	22,254
Sublease income	(49,695)	(48,698)	(53,377)
Total lease cost, net	57,431	77,195	81,825
Cash paid for amounts included in the measurement of operating lease liabilities	120,897	147,672	145,226
Cash receipts from sublease arrangements	44,758	46,245	51,968
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 22,660	$ 28,291	$ 12,715
Weighted average remaining lease term for operating leases (in years)	5 years 10 months 24 days	6 years 7 months 6 days	7 years 3 months 18 days
Weighted average discount rate for operating leases	5.60%	6.40%	6.60%
Cost of subleasing activities	$ 33,400	$ 36,400	$ 43,100
Loss on impairment of lease related assets, net	$ 4,766	$ 10,909	$ 20,368

Stockholders' Equity - Changes in AOCL/I by Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	$ 1,359,169	$ 680,634	$ 227,798
Change in AOCI/L before reclassifications to income	37,318	(26,566)
Reclassifications from AOCI/L to income	10,000	14,564
Other comprehensive income (loss), net for the year	47,318	(12,002)	25,279
Ending Balance	319,908	1,359,169	680,634
Derivative reclassifications	(16,116)	(12,676)	(14,226)
Interest rate swap
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Derivative reclassifications	13,200	19,100
Total
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	(88,333)	(76,331)	(101,610)
Other comprehensive income (loss), net for the year	47,318	(12,002)	25,279
Ending Balance	(41,015)	(88,333)	(76,331)
Interest Rate Swaps
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	(9,800)	(24,162)
Change in AOCI/L before reclassifications to income	0	0
Reclassifications from AOCI/L to income	9,800	14,362
Other comprehensive income (loss), net for the year	9,800	14,362
Ending Balance	0	(9,800)	(24,162)
Defined Benefit Pension Plans
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	(5,214)	(5,731)
Change in AOCI/L before reclassifications to income	(930)	315
Reclassifications from AOCI/L to income	200	202
Other comprehensive income (loss), net for the year	(730)	517
Ending Balance	(5,944)	(5,214)	(5,731)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	(73,319)	(46,438)
Change in AOCI/L before reclassifications to income	38,248	(26,881)
Reclassifications from AOCI/L to income	0	0
Other comprehensive income (loss), net for the year	38,248	(26,881)
Ending Balance	$ (35,071)	$ (73,319)	$ (46,438)

Debt (Tables)

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Schedule of Debt

The Company’s total outstanding borrowings are summarized in the table below (in thousands).


	December 31,
Description	2025		2024
2024 Credit Agreement - Revolving credit facility (1)	$	—	$	274,400
4.50% Senior Notes due 2028 (“2028 Notes”)	800,000		800,000
3.63% Senior Notes due 2029 (“2029 Notes”)	600,000		600,000
3.75% Senior Notes due 2030 (“2030 Notes”)	800,000		800,000
4.95% Senior Notes due 2031 (“2031 Notes”)	350,000		—
5.60% Senior Notes due 2035 (“2035 Notes”)	450,000		—
Other (2)	5,000		5,000
Principal amount outstanding (3)	3,005,000		2,479,400
Less: Deferred financing fees and unamortized discounts (4)	(23,326)		(19,485)
Net balance sheet carrying amount	$	2,981,674	$	2,459,915

(1)The Company had approximately $1.0 billion of available borrowing capacity on the 2024 Credit Agreement revolver (not including the expansion feature) as of December 31, 2025.

(2)Consists of a State of Connecticut economic development loan originated in 2019 with a 10-year maturity and bears interest at a fixed rate of 1.75%. The Company expects to repay the loan in 2026.

(3)The weighted average annual effective rate on the Company’s outstanding debt for 2025, including the effects of its interest rate swaps discussed below, was 4.66%.

(4)Deferred financing fees and unamortized discounts and are being amortized to Interest expense over the term of the related debt obligation.

Employee Benefits - Benefit Plans and Related Amounts Recorded in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Projected benefit obligation	$ 81,795	$ 69,710	$ 68,403	$ 55,311
Pension plan assets at fair value	(44,835)	(34,931)	(33,034)	$ (27,798)
Funded status – shortfall	36,960	34,779	35,369
Accumulated benefit obligation	72,432	62,481	61,713
Amounts recorded in the Consolidated Balance Sheets for the plans
Other liabilities — accrued pension obligation	36,960	34,779	35,369
Stockholders’ equity — deferred actuarial loss	$ (5,944)	$ (5,214)	$ (5,731)
Future long-term rate of return on plan assets	4.63%
Weighted average amortization period	7 years

Revenue and Related Matters - Timing Of Revenue Recognition Liabilities per Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 6,497,226	$ 6,267,411	$ 5,906,956
Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	5,462,404	5,241,103	4,906,792
Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	1,034,822	1,026,308	1,000,164
Insights
Disaggregation of Revenue [Line Items]
Total revenues	5,072,570	4,829,051	4,516,035
Insights \| Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	5,062,390	4,818,254	4,502,783
Insights \| Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	10,180	10,797	13,252
Conferences
Disaggregation of Revenue [Line Items]
Total revenues	644,743	583,224	505,164
Conferences \| Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Conferences \| Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	644,743	583,224	505,164
Consulting
Disaggregation of Revenue [Line Items]
Total revenues	552,499	558,537	514,746
Consulting \| Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	398,551	420,160	400,171
Consulting \| Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	153,948	138,377	114,575
Other
Disaggregation of Revenue [Line Items]
Total revenues	227,414	296,599	371,011
Other \| Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	1,463	2,689	3,838
Other \| Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	$ 225,951	$ 293,910	$ 367,173

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Stock-Based Compensation - Schedule of Changes in SARs Outstanding (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Weighted Average Remaining Contractual Term (Years)
Granted	1 year 7 months 6 days
Stock appreciation rights
SARs
Outstanding, Beginning Balance (in shares)	0.4
Granted (in shares)	0.1
Exercised (in shares)	(0.1)
Outstanding, Ending Balance (in shares)	0.4	0.4
Vested and exercisable, ending balance (in shares)	0.2
Per Share Weighted Average Exercise Price
Outstanding, Beginning Balance (in dollars per share)	$ 293.38
Granted (in dollars per share)	534.45
Exercised (in dollars per share)	163.71
Outstanding, Ending Balance (in dollars per share)	346.07	$ 293.38
Vested and exercisable, ending balance (in Dollars per share)	264.27
Per Share Weighted Average Grant Date Fair Value
Outstanding, Beginning Balance (in dollars per share)	96.17
Granted (in dollars per share)	167.91
Exercised (in Dollars per share)	39.99
Outstanding, Ending Balance (in dollars per share)	113.88	$ 96.17
Vested and exercisable, ending balance (in Dollars per share)	$ 83.00
Weighted Average Remaining Contractual Term (Years)
Weighted average remaining contractual terms	3 years 10 months 9 days	4 years 2 months 15 days
Granted	6 years 1 month 6 days
Weighted average remaining contractual terms vested and exercisable	2 years 10 months 17 days
Unvested SARs (in shares)	0.4	0.4
Aggregate intrinsic value of outstanding shares	$ 8.5
Aggregate intrinsic value of shares vested and exercisable	$ 8.5
Stock appreciation rights \| Unvested
SARs
Outstanding, Ending Balance (in shares)	0.2
Weighted Average Remaining Contractual Term (Years)
Unvested SARs (in shares)	0.2

Goodwill and Intangible Assets - Carrying Amounts of Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance		$ 1,082,117	$ 1,098,583
Intangible assets fully amortized	$ (73,589)	(11,200)
Foreign currency translation impact	23,429	(5,266)
Gross cost	1,031,957	1,082,117
Accumulated amortization	(695,654)	(672,428)
Finite-lived intangible assets, net	336,303	409,689
Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance		1,071,917	1,077,183
Intangible assets fully amortized	(73,589)	0
Foreign currency translation impact	23,429	(5,266)
Gross cost	1,021,757	1,071,917
Accumulated amortization	(687,416)	(665,131)
Finite-lived intangible assets, net	$ 334,341	406,786
Customer Relationships \| Minimum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	6 years
Customer Relationships \| Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	13 years
Technology-related
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance			11,200
Intangible assets fully amortized		(11,200)
Foreign currency translation impact		0
Gross cost		0
Accumulated amortization		0
Finite-lived intangible assets, net		0
Technology-related \| Minimum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	3 years
Technology-related \| Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	7 years
Other
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance		10,200	$ 10,200
Intangible assets fully amortized	$ 0	0
Foreign currency translation impact	0	0
Gross cost	10,200	10,200
Accumulated amortization	(8,238)	(7,297)
Finite-lived intangible assets, net	$ 1,962	$ 2,903
Other \| Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	11 years

Other Assets (Tables)

12 Months Ended

Dec. 31, 2025

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Other Assets

The Company’s other assets are summarized in the table below (in thousands).


	December 31,
	2025		2024
Benefit plan-related assets	$	185,370	$	155,998
Non-current deferred tax assets	245,434		262,757
Other	82,974		79,104
Total other assets	$	513,778	$	497,859

Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2025

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of Components of Defined Benefit Pension Expense

The table below presents the components of the Company’s defined benefit pension plan expense for the years ended December 31 (in thousands). The components of pension expense, other than service cost, are recorded in Other income, net in the Consolidated Statements of Operations.


	2025		2024		2023
Service cost	$	7,255	$	6,765	$	5,363
Interest cost	3,101		2,520		2,173
Expected return on plan assets	(1,509)		(1,213)		(1,132)
Recognition of actuarial loss	262		262		171

Other	—		—		(638)
Total defined benefit pension plan expense	$	9,109	$	8,334	$	5,937

Schedule of Assumptions Used in the Computation of Pension Expense

The table below presents the key assumptions used in the computation of pension expense for the years ended December 31.


	2025		2024		2023
Weighted average discount rate (1)	3.94	%	3.48	%	3.67	%
Expected return on plan assets	3.79	%	3.59	%	3.90	%
Average compensation increase	3.51	%	3.29	%	3.37	%
Cash balance interest credit rate	3.50	%	3.10	%	3.60	%

Schedule of Changes in the Projected Benefit Obligation

The table below provides information regarding changes in the projected benefit obligation of the Company’s defined benefit pension plans for the years ended December 31 (in thousands).


	2025		2024		2023
Projected benefit obligation at beginning of year	$	69,710	$	68,403	$	55,311
Service cost	7,255		6,765		5,363
Interest cost	3,101		2,520		2,173
Actuarial (gain) loss due to assumption changes and plan experience (1)	(707)		(772)		2,527

Benefits payments (2)	(4,180)		(2,838)		(1,974)


Acquisition/Business Combination/Divestiture	—		—		(268)
Other	1,045		—		4,628
Foreign currency impact	5,571		(4,368)		643
Projected benefit obligation at end of year (3)	$	81,795	$	69,710	$	68,403

The table below presents the key assumptions used in determining the projected benefit obligations at December 31.


	2025		2024		2023
Weighted average discount rate (4)	4.55	%	3.94	%	3.48	%
Average compensation increase	3.40	%	3.51	%	3.29	%
Cash balance interest credit rate	4.40	%	3.50	%	3.10	%

(1)The actuarial (gain) losses were primarily due to changes in the weighted average discount rate assumption.

(3)Measured as of December 31.

Schedule of Funded Status of the Plans and Related Amounts Recorded in Consolidated Balance Sheet


Funded status of the plans	2025		2024		2023
Projected benefit obligation	$	81,795	$	69,710	$	68,403
Pension plan assets at fair value (1)	(44,835)		(34,931)		(33,034)
Funded status – shortfall (2)	$	36,960	$	34,779	$	35,369

Accumulated benefit obligation	$	72,432	$	62,481	$	61,713

Amounts recorded in the Consolidated Balance Sheets for the plans
Other liabilities – accrued pension obligation (2)	$	36,960	$	34,779	$	35,369
Stockholders’ equity – deferred actuarial loss (3)	$	(5,944)	$	(5,214)	$	(5,731)

Schedule of Defined Benefit Pension Plans Assets

The table below provides a rollforward of the Company’s defined benefit pension plans assets for the years ended December 31 (in thousands).


	2025		2024		2023
Pension plan assets at the beginning of the year	$	34,931	$	33,034	$	27,798
Company contributions	7,920		6,170		5,022
Benefit payments	(4,180)		(2,838)		(1,974)
Actual return on plan assets	1,456		1,021		1,516


Foreign currency impact	4,708		(2,456)		672
Pension plan assets at the end of the year	$	44,835	$	34,931	$	33,034