    <SEC-DOCUMENT>0000749251-25-000020-index.html : 20250415
    <SEC-HEADER>0000749251-25-000020.hdr.sgml : 20250415
    <ACCEPTANCE-DATETIME>20250415164513
    ACCESSION NUMBER:		0000749251-25-000020
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20250415
    DATE AS OF CHANGE:		20250415

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			GARTNER INC
    		CENTRAL INDEX KEY:			0000749251
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT SERVICES [8741]
    		ORGANIZATION NAME:           	07 Trade & Services
    		EIN:				043099750
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-14443
    		FILM NUMBER:		25840156

    	BUSINESS ADDRESS:
    		STREET 1:		56 TOP GALLANT RD
    		STREET 2:		P O BOX 10212
    		CITY:			STAMFORD
    		STATE:			CT
    		ZIP:			06904-2212
    		BUSINESS PHONE:		2039640096

    	MAIL ADDRESS:
    		STREET 1:		56 TOP GALLANT RD
    		STREET 2:		P O BOX 10212
    		CITY:			STAMFORD
    		STATE:			CT
    		ZIP:			06904-2212

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	GARTNER GROUP INC
    		DATE OF NAME CHANGE:	19930823
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>a2025gartnerincdefa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: a2025gartnerincdefa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>gartnerinc_vxcvxnaxp26225x.jpg
    <TEXT>
    Document 2 - file: gartnerinc_vxcvxnaxp26225x.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>gartnerinc_vxcvxnaxp26225xa.jpg
    <TEXT>
    Document 3 - file: gartnerinc_vxcvxnaxp26225xa.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>