X0202 SCHEDULE 13G/A 0001017918-08-000046 0001017918 XXXXXXXX LIVE 23 Common Stock, $.0005 par value per share 03/31/2026 0000749251 Gartner, Inc. 366651107 56 Top Gallant Rd PO Box 10212 Stamford CT 06902 Rule 13d-1(b) BAMCO INC /NY/ b NY 0 5444566 0 5507077 5507077 7.82 IA CO Baron Capital Group, Inc. b NY 0 5855105 0 5917616 5917616 8.40 HC CO Baron Capital Management, Inc. b NY 0 410539 0 410539 410539 0.58 IA CO Ronald Baron b X1 0 5855105 0 5917616 5917616 8.40 HC IN Gartner, Inc. 56 Top Gallant Rd, PO Box 10212, Stamford, CT 06902 Baron Capital Group, Inc. ("BCG"), BAMCO, Inc. ("BAMCO"), Baron Capital Management, Inc. ("BCM"), Ronald Baron 767 Fifth Avenue, 49th Floor, New York, NY 10153 BCG, BAMCO and BCM are New York corporations. Ronald Baron is a citizen of the United States. N IA HC 5,917,616 8.40 0 5,855,105 0 5,917,616 Y N The advisory clients of BAMCO and BCM have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Issuer's common stock in their accounts. To the best of the Filing Persons' knowledge, no such person has such interest relating to more than 5% of the outstanding class of securities. N BAMCO and BCM are subsidiaries of BCG. Ronald Baron owns a controlling interest in BCG. N Please see Item 3. Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. BAMCO INC /NY/ /s/ Ronald Baron 05/15/2026 Baron Capital Group, Inc. /s/ Ronald Baron 05/15/2026 Baron Capital Management, Inc. /s/ Ronald Baron 05/15/2026 Ronald Baron /s/ Ronald Baron 05/15/2026 Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001)