X0306 4 2015-02-09 0000749251 GARTNER INC IT 0001198849 HALL EUGENE A 56 TOP GALLANT ROAD P.O. BOX 10212 STAMFORD CT 06904-2212 1 1 CEO Common Stock 2015-02-09 4 M 0 30395 0 A 1141985 D Common Stock 2015-02-09 4 F 0 12622 77.92 D 1129363 D Common Stock 2015-02-10 4 M 0 31516 0 A 1160879 D Common Stock 2015-02-10 4 F 0 15331 78.08 D 1145548 D Stock Appreciation Rights 77.92 2015-02-09 4 A 0 126750 0 A 2016-02-09 2022-02-09 Common Stock 126750 126750 D Restricted Stock Units 0 2015-02-09 4 M 0 30395 0 D Common Stock 30395 30394 D Restricted Stock Units 0 2015-02-10 4 A 0 126063 0 A Common Stock 126063 126063 D Restricted Stock Units 0 2015-02-10 4 M 0 31516 0 D Common Stock 31516 94547 D These SARs become exercisable in four substantially equal annual installments commencing on 2/9/2016. Represents shares acquired upon release of RSUs. These RSUs vest in four substantially equal installments, commencing on 02/09/2013. Represents 2015 installment. These performance-based RSUs were awarded on February 10, 2014 and vest in four substantially equal annual installments, commencing on 02/10/2015, the date the performance metric was certified and the actual number of RSUs awarded was determined. Represents shares withheld from released RSUs for the payment of applicable income and payroll withholding taxes due on release. /s/ Clare Kretzman for Eugene A. Hall 2015-02-11