X0306 4 2021-08-12 0000749251 GARTNER INC IT 0001729479 Beck Joseph P. 56 TOP GALLANT RD. STAMFORD CT 06902 1 EVP, Global Technology Sales Common Stock 2021-08-12 4 S 0 1458 303.36 D 4974 D Common Stock 2021-08-12 4 M 0 3068 154.31 A 8042 D Common Stock 2021-08-12 4 D 0 1557 304.09 D 6485 D Common Stock 2021-08-12 4 F 0 657 304.09 D 5828 D Common Stock 2021-08-16 4 S 0 854 306.41 D 4974 D Stock Appreciation Rights 154.31 2021-08-12 4 M 0 3068 0 D 2021-02-05 2027-02-05 Common Stock 3068 9204 D Represents shares acquired upon exercise of SARs. Represents shares withheld that had an aggregate value, based on the market price on the date of exercise, substantially equal to the aggregate exercise price of the SARs. Represents shares withheld for the payment of applicable income and payroll withholding taxes. These SARs were part of an award that becomes exercisable in four substantially equal annual installments, commencing on February 5, 2021. /s/ Kevin Tang for Joseph P. Beck 2021-08-16