#1Gartner Introduction April 30, 2024 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner is a registered trademark of Gartner, Inc. or its affiliates. This presentation, including all supporting materials, is proprietary to Gartner, Inc. and/or its affiliates and is for the sole internal use of the intended recipients. Because this presentation may contain information that is confidential, proprietary or otherwise legally protected, it may not be further copied, distributed or publicly displayed without the express written permission of Gartner, Inc. or its affiliates. Gartner#2Forward Looking Statement and Explanatory Note Statements contained in this presentation regarding the growth and prospects of the business, the Company's projected 2024 financial results, long-term objectives and all other statements in this presentation other than recitation of historical facts are forward looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements involve known and unknown risks, estimates, uncertainties and other factors that may cause actual results to be materially different. Such factors include, but are not limited to, the following: the impact of general economic conditions, including inflation (and related monetary policy by governments in response to inflation), recession, and national elections in a number of large countries on economic activity and our operations; changes in macroeconomic and market conditions and market volatility, including interest rates and the effect on the credit markets and access to capital; our ability to carry out our strategic initiatives and manage associated costs; our ability to recover potential claims under our event cancellation insurance; the timing of conferences and meetings, in particular our Gartner Symposium/Xpo series that normally occurs during the fourth quarter; our ability to achieve and effectively manage growth, including our ability to integrate our acquisitions and consummate and integrate future acquisitions; our ability to pay our debt obligations; our ability to maintain and expand our products and services; our ability to expand or retain our customer base; our ability to grow or sustain revenue from individual customers; our ability to attract and retain a professional staff of research analysts and consultants as well as experienced sales personnel upon whom we are dependent, especially in light of labor competition; our ability to achieve continued customer renewals and achieve new contract value, backlog and deferred revenue growth in light of competitive pressures; our ability to successfully compete with existing competitors and potential new competitors; our ability to enforce and protect our intellectual property rights; our ability to keep pace with technological developments in artificial intelligence; additional risks associated with international operations, including foreign currency fluctuations; the impact on our business resulting from changes in global geopolitical conditions, including those resulting from the conflict in the Middle East, the war in Ukraine and current and future sanctions imposed by governments or other authorities; the impact of restructuring and other charges on our businesses and operations; cybersecurity incidents; risks associated with the creditworthiness, budget cuts, and shutdown of governments and agencies; our ability to meet ESG commitments; the impact of changes in tax policy (including global minimum tax legislation) and heightened scrutiny from various taxing authorities globally; changes to laws and regulations; and other risks and uncertainties described under "Risk Factors" in our most recent Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K. Non-GAAP financial measures such as Adj. EBITDA, Adj. EBITDA Margin, Adj. Net Income, Adj. EPS and Free Cash Flow, as included in this presentation, are supplemental measures that are not calculated in accordance with U.S. GAAP. Definitions of these measures and reconciliations to the most-directly comparable GAAP measures are included in the appendix. Unless otherwise indicated, or the content otherwise requires, all percentages indicated in this presentation are year-over-year growth rates. The Company's SEC filings can be found on Gartner's website at investor.gartner.com and on the SEC's website at www.sec.gov. Forward looking statements included herein speak only as of April 30, 2024 and the Company disclaims any obligation to revise or update such statements to reflect events or circumstances after this date or to reflect the occurrence of unanticipated events or circumstances, except as required by applicable law or regulation. Some totals may not add due to rounding. 2 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#3Gartner is a growth company and a people business Gartner delivers actionable, objective insight that drives smarter decisions and stronger performance on an organization's mission-critical priorities. ~$6B Revenues სა ว IT 回 Finance Human Resources Service Supply Chain Sales Marketing Legal -90 Countries 20,000+ Associates Serving all major enterprise functions A Great Place to Work Fortune World's Most Admired Companies 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 Forbes: Best Management Consulting Firms 2017, 2018, 2019, 2021, 2022, 2023 America's Best Employers For Diversity 2020, 2021, 2022, 2023 Human Rights Campaign Corporate Equality Index Best Places to Work for LGBTQ+ Equality 2018, 2019, 2020, 2021, 2022 3 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#4Strong organic growth complemented by strategic acquisitions 1979 + Company history: 2004 Current CEO Gene Hall joined Gartner New market opportunity: 2012 Organically created new market opportunity in Marketing 2004 2009 2012 2014 2015 2017 2024 & Forward Focus on execution to capture large untapped addressable market 2024 Company history: 1979 Gartner founded to provide technology research New market opportunity: 2009 Acquisition of AMR Research created new market opportunity in Supply Chain New market opportunity: 2014-2015 Acquisition of several tuck-in digital marketing assets focused on serving small businesses New market opportunity: 2017 Acquisition of CEB created new market opportunities across the enterprise © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#5Investors value Gartner for growth, margin expansion, and free cash flow LO 5 Double-digit Growth Double-digit Contract Value and Revenue growth over the next five years and beyond • We have a vast, under penetrated addressable market Gartner delivers actionable, objective insight that drives smarter decisions and stronger performance on an organization's mission-critical priorities Recurring revenue subscription business model (>75%) Modest Margin Expansion EBITDA margins will modestly expand over time through: Gross margin mix G&A leverage Improving salesforce productivity Free Cash Flow Generation Significant free cash flow in excess of net income deployed to repurchase shares and opportunistically make tuck-in acquisitions . Low capital intensity Working capital is a cash source Strong balance sheet © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#6Track Record of Strong Performance Contract Value $ billions @ '24 rates 4.9 4.5 4.0 3.3 3.5 3.0 2.7 1.9 1.7 1.3 1.5 14% CAGR 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 Free Cash Flow $ millions 416 279 308 299 316 344 144 819 1,253 -1,053 993 14% CAGR 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 Note: CV at 2024 FX rates, excludes 1Q23 divestiture and Russia as applicable. 6 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#7Gartner's Growth is Sustainable 7 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#8We help our clients on their ESG journey, and we have a modest carbon footprint, good governance, and a strong focus on enabling our associates to thrive. Governance Maintain strong corporate governance and consistently uphold the highest levels of integrity in our business practices. 89 Associates Build a culture that attracts top talent and enables all associates to thrive. Community Impact Empower community organizations to accelerate positive social change by leveraging our unique expertise and resources. Environmental Sustainability Promote environmental stewardship through our thought leadership and internal operations. Clients Equip our clients to succeed in their mission-critical priorities and make a positive impact on the world. 8 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#9We consistently seek ways to contribute to the positive impact our work and clients' work has on the world Executive Leadership: Sustainability Standardization and U.N. Sustainable Development Goals Strategic Ambition Opportunities Risk and Cost Sustainability Outcomes and Innovation Technology Sustainability Leadership • Gartner survey data shows executive. leaders are increasingly focused on sustainability strategy and initiatives. Our coverage of the topic helps leaders make decisions to thrive within sustainability. We are hiring additional resources to cover Sustainability topics, specifically in our Supply Chain practice and extending into IT and other areas. . • We are concentrating our coverage into . • content available to all clients. Launched a client and prospect-facing Resource Center on Sustainability. 9 Source: Gartner 754705_C Execution Levers © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#10Our success starts with our ability to function as a high- performing team. We hire great people, we develop those individuals, and we help them build mastery of their skills to reach their full potential. We are a team of thinkers, doers and lifelong learners. Explore the foundation of our culture: 10 Impact clients' mission-critical A Embody a no-limits mindset Win as a team 品 Prioritize, O relentlessly priorities Do the right thing and " great results will follow © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. 009 Embrace diversity, inclusiveness and respect Make objective, fact-based decisions 5 Uphold the highest 0/0 ethical standards Get better, faster, stronger every year Be humble, be hungry Gartner#1111 Gartner committed to achieve net-zero greenhouse gas (GHG) emissions by 2035 in accordance with the Science Based Targets initiative (SBTi) Net-Zero Standard. The near-term targets have been submitted to SBTi for verification. Gartner. 2022 Corporate Responsibility Report Insight that drives stronger performance. © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Learn more in our latest Corporate Responsibility Report Gartner#1212 Compelling Client Value Proposition is the Foundation of our Growth © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#13We guide the leaders who shape the world across all business functions and roles. Our clients rely on us to help them address their mission-critical priorities. We deliver actionable, objective insight to executives and their teams. OH Actionable insights created by a global team of ~2,500 experts and former practitioners 490K+ Expert guidance delivered in more than 490,000+ client interactions each year Practical tools to enable faster, smarter decisions for leaders in every major area of an organization As of December 31, 2023. 13 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#14Clients accelerate the time from insight to outcomes by engaging in multiple ways Access objective research, analytics and advice on-demand • Proprietary methodologies and an independent operating model for objective business and technology insights Other proprietary data assets help clients measure and improve functional performance, operations and more Talk to an expert ~2,500 Research & Advisory experts engage in 490,000+ client interactions annually Role-based advice from experts, many who formerly led a function, all who are expert on Gartner insights Management advice augmented by research that includes case studies of successful peer practices Learn from peers A global network of peers from close to 15,000 client enterprises for testing ideas and sharing perspectives that help expedite problem-solving and build a case for clients' plans Structured meetups at conferences, exclusive Annual Executive Retreats and Peer Forums, plus other peer- only events like Leadership Forums to interact with other C-level executives and heads of functions • • Deploy benchmarks and toolkits Step-by-step Gartner Ignition Guides produced for accelerating team execution, plus other ready-to-use templates and tools enable clients to save time and effectively update their processes Peer benchmarks for every major enterprise function to help clients identify capability and performance gaps and prioritize investments that improve performance and drive top- and bottom-line growth Attend conferences Worldwide destination conferences and virtual events to help clients master their role, transform their business and tap into an unsurpassed peer network 1:1 meetings with Gartner experts to learn what clients need to know now and what lies ahead Learnings from visionary leaders and unconventional thinkers who reveal surprising connections between life, business and technology Engage Gartner Consulting Engagements help CIOS and other senior executives drive technology-related strategic initiatives Unbiased, custom analysis grounded in market-leading Gartner research and proprietary tools to optimize technology investments and drive business impact Enhanced negotiation leverage for purchasing across hardware, software, services and telecom, producing measured hard-dollar savings running into hundreds of millions annually for clients each year As of December 31, 2023. 14 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#15Research segment serves executives and their teams across all major enterprise functions in every industry Overview • Gartner Research delivers actionable, objective insight to executives and their teams Subscription model provides ongoing access to research with on-demand response through published research content, data and benchmarks Quarterly Revenue $ millions 1,136- 1,268 1,243 1,217 1,219 1,208 ' - 1,178 -1,142. - 1,148 1Q22 2Q22 3Q22 4Q22 1Q23 2Q23 3Q23 4Q23 1Q24 Quarterly Contribution Margin 74.7% 15 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. 74.1%. 73.9% 73.9%" 73.9% -73.4% 73.3% 74.5% 74.1% 1Q22 2Q22 3Q22 4Q22 1Q23 2Q23 3Q23 4Q23 1Q24 Gartner#16More than 90% of Research Revenue is subscription / recurring 2023 Revenue Subscription Mix Subscription 92% O 8% Non-subscription Subscription Revenue defined as Research revenue transferred over time. See 10-K for details. 16 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#17Distinct sales forces sell to leaders across the enterprise Global Technology Sales (GTS) О $3.8B in Contract Value Global Business Sales (GBS) О $1.1B in Contract Value 0 -80% of Total CV 2 ~3,600 Quota-Bearing Salespeople ~13,000 品 Enterprises IT Human Resources F Finance Service Supply Chain N Sales Marketing As of March 31, 2024. Contract Value shown at 2024 FX rates. Note: Enterprises that are clients of both GTS and GBS appear in both counts. 17 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. -20% of Total CV Legal ~1,200 Quota-Bearing Salespeople 品 ~5,000 Enterprises Gartner#18Illustrative Growth Algorithm 100 4% Wallet Growth CV Growth 12% 19 -18 3 8 Year 2 CV Wallet Growth* is comprised of attrition, modest price increases (~3-4%) and new sales to existing clients Year 2 CV combines Wallet Growth with New Business from new clients Growth of new business (not shown) is the year over year change in total new business (price + new sales to existing + new sales to new clients) 112 104 Year 1 CV Attrition Price New From Existing Clients Year 2 From Existing Clients New From New Clients *Wallet Retention = 1 + Wallet Growth 18 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#19Vast Market Opportunity Detailed bottom-up market opportunity estimate shows Gartner has a very long runway for growth If you take our current total CV of $4.9 billion and grow it at a 15% compound annual rate for 15 years, we'd have only captured a little more than 15% of today's addressable market 19 ~200 38 ($ billions) 24 14 25 23 55 Technology Supply Chain Marketing Human Resources Finance Sales Legal & Other Source: Internal Gartner estimates. CV as of March 31, 2024. 19 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Total Market Opportunity $4.9 B Gartner CV Gartner#20Conferences delivers extraordinary value to an engaged and highly qualified audience Overview Quarterly Revenue $ millions Our mission is to produce must-attend conferences for leaders across the enterprise Conferences are aligned to the same roles and functions of the clients we serve in Research Combines the outstanding value of our research with unparalleled peer networking 10 1Q22 114 188 77 65 55 214 169 70 57 0 2Q22 3Q22 4Q22 1Q23 2Q23 3Q23 4Q23 1Q24 Quarterly Contribution Margin 64.8%, 58.3% 52.3%- -53.0%. 50.4% 41.4% 35.8% 33.2% • 20 20 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. -27.8% 1Q22 2Q22 3Q22 4Q22 1Q23 2Q23 3Q23 4Q23 1Q24 Gartner#21Consulting helps clients execute their most strategic initiatives through deeper, extended, project-based work Overview Quarterly Revenue $ millions • 21 24 Provides clients extended, project-based work to help them execute their most strategic initiatives Supports executives with their strategic technology projects Powered by Gartner research, offerings are differentiated by our independent and objective insight and advice © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. 116 121 107 138 135 133 127 128 126 1Q22 2Q22 3Q22 4Q22 1Q23 2Q23 3Q23 4Q23 1Q24 Quarterly Contribution Margin 44.0% 41.6% 40.0% 40.3% 37.2% 37.4% 36.5% 34.8% 27.1% 1Q22 2Q22 3Q22 4Q22 1Q23 2Q23 3Q23 4Q23 1Q24 Gartner#22Consolidated Financials and Capital Allocation 22 22 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#23Gartner by the Numbers 2024 Revenue Guidance by Segment Research 83% Conferences 9% Consulting 8% 2023 Gross Margin Mix Research 89% Conferences 6% Consulting 5% 2023 Revenue by Geography United States & Canada 66% Guidance as of April 30, 2024. Historical data as of December 31, 2023. Note: Margins above exclude certain unallocated bonus and fringe costs recorded in consolidated Cost of services and product development. 23 23 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Europe, Middle East & Africa 23% Other International 11% Gartner#24Non-GAAP P&L Revenues $ millions 1,503 1,586 1,473 Adj. EBITDA $ millions 384 379 386 382 M M 1,409 1,409 1Q23 2Q23 3Q23 4Q23 1Q24 333 1Q23 2Q23 3Q23 4Q23 1Q24 $ millions except per share amounts 1Q23 2Q23 3Q23 4Q23 1Q24 2023 Revenue 1,409 1,503 1,409 1,586 1,473 5,907 Less Cost of Services 435 487 451 530 459 1,903 Contribution 974 1,016 958 1,056 1,013 4,004 Less SG&A 657 680 661 704 690 2,702 Plus Equity Comp 45 32 27 26 51 130 Plus Other Adjustments * 17 17 9 8 100 8 51 Adj. EBITDA 379 384 333 386 382 1,483 Less Equity Comp 45 Less Depreciation Less Non-GAAP Interest, net 225 24 26 222 32 27 26 51 130 24 25 26 26 99 23 21 19 18 90 Less Other Expense (Income) 1 1 1 0 3 Adjusted Pre-tax Income 283 304 260 315 288 1,162 Less Adjusted Tax 51 77 57 74 56 259 Adjusted Net Income Adj. EPS 231 227 203 241 232 903 * Consists of direct and incremental expenses related to acquisitions and divestitures, impairment loss for lease related assets, facility-related exit costs and other non-recurring items. 2024 Gartner, Inc. and/or its affiliates. All rights reserved. 24 2.88 2.85 2.56 3.04 2.93 11.33 Gartner#25Business model drives strong free cash flow Recurring Revenue Upfront Invoicing High Renewal Rates High Contribution Margins Low Capital Intensity Reinvestments for Growth Share Repurchases Free Cash Flow Tuck-in M&A 25 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#26Capital Structure and Allocation Capital Structure Optimizes financial leverage benefits and financial flexibility Target 2-2.5x leverage¹ $ billions Cash 3/31/2024 Rate 1.2 nm Maturity nm Revolver 0.3 Term SOFR + 135 2029 • ~$200M cash is needed to run the business 2028 Bonds 0.8 4.50% 2028 Free Cash Flow deployment • Expect to offset equity dilution Opportunistic, price sensitive stock repurchases Strategic value-enhancing tuck-in acquisitions No current plans for material debt repayments 2029 Bonds 0.6 3.63% 2029 2030 Bonds 0.8 3.75% 2030 Total Debt 2.5 5.06% Revolver Unused Capacity 0.7 15 bps Interest Rate Swaps 0.4 2.98% % Debt With Fixed Rates 100% Leverage Ratios 1Q 2024 Bank Covenant Share Repurchases $ millions 1,656 1,044 Gross Debt/Adjusted EBITDA1 Net Debt/Adjusted EBITDA Consolidated Leverage Ratio 2 1.7x na 0.8x na 1.4x ≤ 4.0x 432 509 182 261 59 - 199 - 176 41 606 225 Debt Ratings Fitch S&P T T 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 YTD Moody's Investment Grade Ratings BBB BBB- Baa3 2024 ~$830M repurchase authorization remaining as of 3/31/2024 1 Gross debt/Trailing twelve month Adjusted EBITDA. 2 26 As defined in the Company's 2024 Credit Agreement. © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#27Medium Term Guidance Segment Revenue Guidance Research (GTS & GBS) 12-16% Conferences 5-10% Consulting 3-8% Consolidated Guidance Revenue ≥ 10% EBITDA EPS ≥ Revenue Growth > EBITDA Growth 27 27 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Free Cash Flow ≥ EBITDA Growth Gartner#2828 Appendix © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#29Definitions Adjusted EBITDA and Adjusted EBITDA Margin: Represents GAAP net income (loss) adjusted for: (i) interest expense, net; (ii) tax provision (benefit); (iii) gain on event cancellation insurance claims, as applicable; (iv) gain/loss on divestitures, as applicable; (v) other (income) expense, net; (vi) stock-based compensation expense; (vii) depreciation, amortization, and accretion; (viii) loss on impairment of lease related assets, as applicable; and (ix) acquisition and integration charges and certain other non-recurring items. Adjusted EBITDA Margin represents Adjusted EBITDA divided by GAAP Revenue. We believe Adjusted EBITDA and Adjusted EBITDA Margin are important measures of our recurring operations as they exclude items not representative of our core operating results. Adjusted Net Income: Represents GAAP net income (loss) adjusted for the impact of certain items directly related to acquisitions and other non-recurring items. These adjustments include: (i) the amortization of acquired intangibles; (ii) acquisition and integration charges and other non-recurring items; (iii) gain on event cancellation insurance claims, as applicable; (iv) gain/loss on divestitures, as applicable; (v) loss on impairment of lease related assets, as applicable; (vi) the non-cash (gain) loss on de-designated interest rate swaps, as applicable; and (vii) the related tax effect. We believe Adjusted Net Income is an important measure of our recurring operations as it excludes items that may not be indicative of our core operating results. Adjusted EPS: Represents GAAP diluted EPS adjusted for the impact of certain items directly related to acquisitions and other non-recurring items. These adjustments include on a per share basis: (i) the amortization of acquired intangibles; (ii) acquisition and integration charges and other non-recurring items; (iii) gain on event cancellation insurance claims, as applicable; (iv) gain/loss on divestitures, as applicable; (v) loss on impairment of lease related assets, as applicable; (vi) the non-cash (gain) loss on de-designated interest rate swaps, as applicable; and (vii) the related tax effect. We believe Adjusted EPS is an important measure of our recurring operations as it excludes items that may not be indicative of our core operating results. Free Cash Flow: Represents cash provided by operating activities determined in accordance with GAAP less payments for capital expenditures. We believe Free Cash Flow is an important measure of the recurring cash generated by the Company's core operations that may be available to be used to repay debt obligations, repurchase our stock, invest in future growth through new business development activities, or make acquisitions. Foreign Currency Neutral (FX Neutral): We provide foreign currency neutral dollar amounts and percentages for our contract values, revenues, certain expenses, and other metrics. These foreign currency neutral dollar amounts and percentages eliminate the effects of exchange rate fluctuations and thus provide a more accurate and meaningful trend in the underlying data being measured. We calculate foreign currency neutral dollar amounts by converting the underlying amounts in local currency for different periods into U.S. dollars by applying the same foreign exchange rates to all periods presented. Non-GAAP Interest: Interest expense, net excluding amortization of certain deferred financing fees. 29 29 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#30Definitions of Key Metrics/Calculations Segment Research Conference Consulting Business Measurements Contract value represents the dollar value attributable to all of our subscription-related contracts. It is calculated as the annualized value of all contracts in effect at a specific point in time, without regard to the duration of the contract. Contract value primarily includes Research deliverables for which revenue is recognized on a ratable basis, as well as other deliverables (primarily Conferences tickets) for which revenue is recognized when the deliverable is utilized. Comparing contract value year-over-year not only measures the short-term growth of our business, but also signals the long-term health of our Research subscription business since it measures revenue that is highly likely to recur over a multi-year period. Our contract value consists of Global Technology Sales contract value, which includes sales to users and providers of technology, and Global Business Sales contract value, which includes sales to all other functional leaders. Client retention rate represents a measure of client satisfaction and renewed business relationships at a specific point in time. Client retention is calculated on a percentage basis by dividing our current clients, who were also clients a year ago, by all clients from a year ago. Client retention is calculated at an enterprise level, which represents a single company or customer. Wallet retention rate represents a measure of the amount of contract value we have retained with clients over a twelve-month period. Wallet retention is calculated on a percentage basis by dividing the contract value of our current clients, who were also clients a year ago, by the contract value from a year ago, excluding the impact of foreign currency exchange. When wallet retention exceeds client retention, it is an indication of retention of higher-spending clients, or increased spending by retained clients, or both. Wallet retention is calculated at an enterprise level, which represents a single company or customer. Number of destination conferences represents the total number of hosted virtual or in-person conferences completed during the period. Single day, local meetings are excluded. Number of destination attendees represents the total number of people who attend virtual or in-person conferences. Single day, local meetings are excluded. Consulting backlog represents future revenue to be derived from in-process consulting and benchmark analytics engagements. Utilization rate represents a measure of productivity of our consultants. Utilization rates are calculated for billable headcount on a percentage basis by dividing total hours billed by total hours available to bill. 30 Note: Please see Gartner's 2023 SEC Form 10-K for additional definitions and explanations about the business. © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#31Appendix Corporate Responsibility at Gartner https://www.gartner.com/en/about/corporate-responsibility Corporate Responsibility Report https://emtemp.gcom.cloud/ngw/globalassets/en/about/documents/2022-gartner-corporate-responsibility- report.pdf Governance Documents https://investor.gartner.com/corporate-governance/governance-overview Gartner Policies https://www.gartner.com/en/about/policies/overview Management Team https://www.gartner.com/en/about/management 31 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#32Non-GAAP Reconciliations $ millions Reconciliation- Net Income to Adjusted EBITDA: Net Income 1Q23 2Q23 295.8 Interest expense, net 27.4 3Q23 4Q23 1Q24 198.0 180.0 208.6 210.5 24.6 21.8 20.5 19.2 Gain on event cancellation insurance claims (a) (3.1) Other (income) expense, net 2.4 (5.6) (1.9) 3.7 (4.9) Tax provision 85.5 66.1 44.5 68.6 49.0 Operating income 408.0 283.1 244.4 301.4 273.9 Adjustments: Stock-based compensation expense (b) 45.0 32.2 27.0 25.5 50.5 Depreciation, accretion, and amortization (c) 46.9 46.8 48.8 49.6 49.6 Loss on impairment of lease related assets (d) 8.7 10.0 0.3 1.3 0.5 Acquisition and integration charges and other nonrecurring items (e) Gain from sale of divested operation (f) 9.7 8.3 12.8 8.6 7.6 (139.3) 3.9 - Adjusted EBITDA 379.0 384.4 333.4 386.4 382.1 $ millions Reconciliation - Cash Provided by Operating Activities to Free Cash Flow: Cash provided by operating activities (g) Less: cash paid for capital expenditures Free Cash Flow (g) (a) Consists of the gain on event cancellation insurance claims for events cancelled in 2020. (b) Consists of charges for stock-based compensation. (c) Includes depreciation expense, amortization of intangibles, and accretion on asset retirement obligations. (d) Includes impairment loss for lease related assets. (e) Consists of incremental and directly- (f) related charges related to acquisitions and divestitures, facility-related exit costs, and other non-recurring items, if applicable. Consists of the gain on our February 2023 divestiture, as finalized in 2Q23 (g) Cash provided by operating activities and Free Cash Flow in 2021 included ~$167 million of proceeds related to 2020 event cancellation insurance claims. 2015 345.6 2013 2014 315.7 346.8 (36.5) (38.5) (46.1) 279.2 308.3 299.4 2016 2017 2018 2019 365.6 254.5 471.2 565.4 (49.9) (110.8) (126.9) (149.0) 315.8 143.8 344.3 416.4 2020 2021 2022 903.2 1,312.5 1,101.4 (83.8) (59.8) (108.1) 819.3 1,252.7 993.2 $ millions Reconciliation - Cash Provided by Operating Activities to Free Cash Flow: Cash provided by operating activities Less: cash paid for capital expenditures Free Cash Flow 1Q23 2Q23 3Q23 164.7 435.8 330.9 (21.1) (25.6) (28.5) 143.6 410.2 302.5 32 32 2024 Gartner, Inc. and/or its affiliates. All rights reserved. 4Q23 1Q24 224.3 188.8 (28.0) (22.7) 196.4 166.2 Gartner#3333 Non-GAAP Reconciliations In millions except per share amounts Reconciliations - GAAP Net Income to Adjusted Net Income: 1Q23 2Q23 3Q23 4Q23 1Q24 GAAP net income 295.8 198.0 180.0 208.6 210.5 Acquisition and other adjustments: Amortization of acquired intangibles (a) 22.7 22.9 24.0 22.8 23.0 Acquisition and integration charges and other nonrecurring items (b) Gain on event cancellation insurance claims (c) 10.9 9.5 14.0 9.8 9.1 (3.1) Gain from sale of divested operation (d) (139.3) 3.9 - Loss on impairment of lease related assets (e) 8.7 10.0 0.3 1.3 0.5 (Gain) loss on de-designated interest rate swaps (f) 1.4 (6.5) (2.5) 3.7 (4.5) Tax impact of adjustments 34.3 (10.6) (12.5) (5.6) (7.1) Adjusted net income 231.5 227.3 203.3 240.7 231.6 Diluted shares 80.3 79.8 79.5 79.0 79.0 Adjusted EPS 2.88 2.85 2.56 3.04 2.93 Reconciliations - GAAP Net Income per diluted share to Adjusted EPS: 1Q23 2Q23 3Q23 4Q23 1Q24 GAAP net income per diluted share 3.68 2.48 2.26 2.64 2.67 Acquisition and other adjustments: Amortization of acquired intangibles (a) 0.28 0.29 0.30 0.29 0.29 Acquisition and integration charges and other nonrecurring items (b) Gain on event cancellation insurance claims (c) 0.14 0.12 0.18 0.12 0.12 (0.04) Gain from sale of divested operation Loss on impairment of lease related assets (e) (Gain) loss on de-designated interest rate swaps Tax impact of adjustments Adjusted EPS (d) (1.74) 0.05 0.11 0.13 0.02 0.01 (f) 0.02 (0.08) (0.03) 0.05 (0.06) 0.43 (0.13) (0.16) (0.07) (0.09) 2.88 2.85 2.56 3.04 2.93 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. (a) Consists of non-cash amortization charges from acquired intangibles. (b) Consists of incremental and directly-related charges related to acquisitions and divestitures, facility-related exit costs, and other nonrecurring items, if applicable. Includes the amortization and write-off of deferred financing fees, which are recorded in Interest expense, net in the (Condensed) Consolidated Statements of Operations. (c) Consists of the gain on event cancellation insurance claims for events cancelled in 2020. (d) Consists of the gain on our February 2023 divestiture, as finalized in 2Q23 (e) Includes impairment loss for lease related assets. (f) Represents the fair value adjustment for interest rate swaps after de-designation. Gartner#34Non-GAAP Reconciliations $ millions Reconciliation - Interest, net to Non-GAAP Interest, net 1Q23 2Q23 3Q23 4Q23 1Q24 Interest, net 27.4 24.6 21.8 20.5 19.2 Less amortization of deferred financing fees (1.2) (1.2) (1.2) (1.2) (1.5) Non-GAAP Interest, net 26.2 23.4 20.6 19.3 17.7 Effective GAAP Tax Rate to Adjusted Tax Rate: 1Q23 2Q23 3Q23 4Q23 1Q24 GAAP Rate 22.4 % 25.0 % 19.8 % 24.8 % 18.9 % Acquisition and Other Adjustments 34.8 % 26.6 % 34.9 % 14.9 % 25.3 % Adjusted Tax Rate 18.1 % 25.2 % 21.9 % 23.6 % 19.5 % 34 =4 © 2024 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner#3535 55 For Further Information Contact Details David Cohen SVP, Investor Relations [email protected] Gartner © 2024 Gartner, Inc. and/or its affiliates. All rights reserved.