0000749251 2026-10-03 2026-10-03 GARTNER INC false 0000749251 8-K 2026-10-03 DE 1-14443 04-3099750 P.O. Box 10212 56 Top Gallant Road Stamford CT 06902-7747 (203) 964-0096 false false false false Common Stock, $0.0005 par value per share IT NYSE false