144 0001721344 XXXXXXXX LIVE 0000749251 Gartner, Inc. 001-14443 P.O. Box 10212 56 Top Gallant Road Stamford CT 06902 203-964-0096 Eileen Serra Director Common Stock J.P. Morgan Securities LLC

390 Madison Avenue - 6th Floor New York NY 10017

1200 587568 76818191 02/24/2025 NYSE Common Stock 05/24/2024 Board Compensation Issuer N 1200 05/24/2024 Board Compensation Y 02/24/2025 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Eileen Serra