X0609 4 2026-04-01 0000749251 GARTNER INC IT 0001275975 FERGUSON DIANA SUE false 56 TOP GALLANT RD. STAMFORD CT 06902 1 0 Common Stock 2026-04-01 4 J 0 174 0 A 2606 D Common Stock Equivalent (CSE) 0 2026-04-01 4 A 0 174 154.79 A Common Stock 174 255 D Common Stock Equivalent (CSE) 0 2026-04-01 4 J 0 174 0 D Common Stock 174 81 D This reporting person has elected to receive an immediate distribution of the CSE shares. These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("LTIP"). The CSEs convert into Gartner common stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the LTIP. /s/ Kevin Tang for Diana S. Ferguson 2026-04-03