X0508 4 2025-02-06 0000749251 GARTNER INC IT 0001308381 Kranich Robin B 56 TOP GALLANT ROAD P.O. BOX 10212 STAMFORD CT 06904-2212 1 EVP & CHRO 0 Common Stock 2025-02-08 4 M 0 1258 0 A 18670 D Common Stock 2025-02-08 4 F 0 519 529.29 D 18151 D Common Stock 2025-02-09 4 M 0 1601 0 A 19752 D Common Stock 2025-02-09 4 F 0 791 529.29 D 18961 D Common Stock 2025-02-09 4 M 0 1324 0 A 20285 D Common Stock 2025-02-09 4 F 0 733 529.29 D 19552 D Restricted Stock Units 0 2025-02-06 4 A 0 5030 0 A Common Stock 5030 5030 D Stock Appreciation Rights 534.45 2025-02-06 4 A 0 5239 0 A 2026-02-06 2032-02-06 Common Stock 5239 5239 D Restricted Stock Units 0 2025-02-08 4 M 0 1258 0 D Common Stock 1258 3772 D Restricted Stock Units 0 2025-02-09 4 M 0 1601 0 D Common Stock 1601 1601 D Restricted Stock Units 0 2025-02-09 4 M 0 1324 0 D Common Stock 1324 2647 D Represents shares acquired upon the vesting of the first installment of the RSUs in footnote 5 on February 8, 2025. These RSUs convert into common stock on a one-for-one basis. Represents shares withheld for the payment of applicable income and payroll withholding taxes. Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 9, 2023. This represents the 2025 installment. Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 9, 2024. This represents the 2025 installment. These performance-based RSUs were awarded on February 8, 2024 and vest in four substantially equal annual installments, commencing on February 8, 2025. This represents the number of RSUs awarded after the performance metric was certified. These SARs become exercisable in four substantially equal annual installments, commencing on February 6, 2026. /s/ Kevin Tang for Robin B. Kranich 2025-02-10