X0508 4 2024-02-09 0000749251 GARTNER INC IT 0001198849 HALL EUGENE A 56 TOP GALLANT ROAD P.O. BOX 10212 STAMFORD CT 06904-2212 1 1 CEO 0 Restricted Stock Units 0 2024-02-09 4 A 0 30135 0 A Common Stock 30135 30135 D These performance-based RSUs were awarded on February 9, 2023 and vest in four substantially equal annual installments, commencing on February 9, 2024. This represents the actual number of RSUs awarded after the performance metric was certified. /s/ Kevin Tang for Eugene A. Hall 2024-02-13