X0306 4 2016-02-09 1 0000749251 GARTNER INC IT 0001385624 Hrelic Darko 56 TOP GALLANT RD P.O. BOX 10212 STAMFORD CT 06904-2212 1 SVP & CIO Common Stock 2016-02-09 4 M 0 4230 0 A 74646 D Common Stock 2016-02-09 4 F 0 1354 80.94 D 73292 D Common Stock 2016-02-09 4 M 0 3961 0 A 77253 D Common Stock 2016-02-09 4 F 0 1394 80.94 D 75859 D Restricted Stock Units 0 2016-02-09 4 A 0 15844 0 A Common Stock 15844 15844 D Restricted Stock Units 0 2016-02-09 4 M 0 4230 0 D Common Stock 4230 0 D Restricted Stock Units 0 2016-02-09 4 M 0 3961 0 D Common Stock 3961 11883 D Represents shares acquired upon release of RSUs. These performance-based RSUs were awarded on February 9, 2015 and vest in four substantially equal annual installments, commencing on 2/9/2016, the date the performance metric was certified and the actual number of RSUs awarded was determined. These RSUs vest in four substantially equal installments, commencing on 02/09/2013. Represents 2016 installment. Represents shares withheld from released RSUs for the payment of applicable income and payroll withholding taxes due on release. /s/ Clare Kretzman for Darko Hrelic 2016-02-10