IT: Leadership change

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On October 3, 2026, Mr. Thomas Kim, Executive Vice President, Chief Legal Officer & Secretary of Gartner, Inc. (the “Company” or “Gartner”), notified the Company that he will be stepping down from his role effective October 16, 2026 to pursue a new senior executive opportunity. There has been no disagreement between Mr. Kim and Gartner on any matter relating to the Company’s financials, operations, policies or practices. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Gartner, Inc. Date: October 8, 2026 By: /s/ Craig W. Safian Craig W. Safian Executive Vice President and Chief Financial Officer