X0508 4 2025-08-29 0000749251 GARTNER INC IT 0001198849 HALL EUGENE A 56 TOP GALLANT ROAD P.O. BOX 10212 STAMFORD CT 06904-2212 1 1 Chairman and CEO 0 Common Stock 2025-08-29 4 J 0 24 238.63 A 1170281 D Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective May 1, 2024) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c). /s/ Kevin Tang for Eugene A. Hall 2025-09-03