X0508 4 2026-02-05 0000749251 GARTNER INC IT 0001964065 Wartinbee William James III 56 TOP GALLANT ROAD STAMFORD CT 06902 1 EVP, Global Sales&Serv Ops 0 Restricted Stock Units 0 2026-02-05 4 A 0 1381 0 A Common Stock 1381 1381 D Stock Appreciation Rights 152.03 2026-02-05 4 A 0 10133 0 A 2027-02-05 2033-02-05 Common Stock 10133 10133 D These performance-based RSUs were awarded on February 6, 2025 and vest in four substantially equal annual installments, commencing on February 6, 2026. 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 5, 2027. /s/ Kevin Tang for William James Wartinbee III 2026-02-09