SECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549 Form 10-Q (Mark One) ☑QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIESEXCHANGE ACT OF 1934.For the quarterly period ended March31, 2026OR☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIESEXCHANGE ACT OF 1934. Commission File Number 1-14443Gartner, Inc. Registrant’s telephone number, including area code: (203) 964-0096 Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports),and (2) has been subject to such filing requirements for the past 90 days. Yes☑No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submittedpursuant to Rule 405 of Regulation S-T (§232.405) during the preceding 12 months (or for such shorter period that the registrant wasrequired to submit such files). Yes☑No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smallerreporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer☑Accelerated filer☐Non-accelerated filerSmaller reporting company☐Emerging growth companyIf an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☐No☑ As of May1, 2026, 66,951,889 shares of the registrant’s common shares were outstanding. Table of Contents PART I. FINANCIAL INFORMATIONITEM 1. FINANCIAL STATEMENTS (Unaudited)Condensed Consolidated Balance Sheets at March 31, 2026 and December 31, 2025Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2026 and 2025Condensed Consolidated Statements of Comprehensive Income for the Three Months Ended March 31, 2026 and 2025Condensed Consolidated Statements of Changes in Stockholders’ Equity for the Three Months Ended March 31, 2026 and2025Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2026 and 2025Notes to Condensed Consolidated Financial StatementsITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OFOPERATIONS23ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK34ITEM 4. CONTROLS AND PROCEDURES34PART II. OTHER INFORMATIONITEM 1. LEGAL PROCEEDINGS35ITEM 1A. RISK FACTORS35ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS35ITEM 5. OTHER INFORMATION35ITEM 6. EXHIBITS36 ITEM 1. FINANCIAL STATEMENTS GARTNER, INC. AND SUBSIDIARIESCondensed Consolidated Balance Sheets(Unaudited; in thousands, except share data) GARTNER, INC.AND SUBSIDIARIESCondensed Consolidated Statements of Comprehensive Income Three Months EndedMarch 31, GARTNER, INC. AND SUBSIDIARIESNOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) Note 1 — Business and Basis of Presentation Business.Gartner, Inc. (NYSE: IT) delivers actionable, objective business and technology insights that drive smarter decisions andstronger performance on an organization’s mission-critical priorities. Segments. Gartner delivers its products and services globally through three reportable segments: Business and Technology Insights (or“Insights”), Conferences and Consulting. Revenues and other financial information for the Company’s segments are discussed in Note7 — Segment Information. Basis of presentation. The accompanying interim Condensed Consolidated Financial Statements have been prepared in accordancewith generally accepted accounting principles in the United States of America (“U.S. GAAP”), as defined in Financial AccountingStandards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 270 for interim financial information and with theapplicable instructions of U.S. Securities and Exchange Commission (“SEC”) Rule 10-01 of Regulation S-X on Form 10-Q, andshould be read in conjunction with the consolidated financial statements and related notes of the Company in its Annual Report onForm 10-K for the year ended December31, 2025. The fiscal year of Gartner is the twelve-month period from January 1 through December 31. In the opinion of management, all normalrecurring accruals and adjustments considered necessary for a fair presentation of financial position, results of operations and cashflows at the dates and for the periods presented herein have been included. The results of