<SEC-DOCUMENT>0001127602-23-004550.txt : 20230210
<SEC-HEADER>0001127602-23-004550.hdr.sgml : 20230210
<ACCEPTANCE-DATETIME>20230210182241
ACCESSION NUMBER:		0001127602-23-004550
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230208
FILED AS OF DATE:		20230210
DATE AS OF CHANGE:		20230210

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hensel Scott
		CENTRAL INDEX KEY:			0001674793

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14443
		FILM NUMBER:		23613910

	MAIL ADDRESS:	
		STREET 1:		C/O GARTNER, INC.
		STREET 2:		56 TOP GALLANT RD.
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902

	FORMER NAME:	
		FORMER CONFORMED NAME:	HENSEL SCOTT
		DATE OF NAME CHANGE:	20160516

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GARTNER INC
		CENTRAL INDEX KEY:			0000749251
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT SERVICES [8741]
		IRS NUMBER:				043099750
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	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>
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    <periodOfReport>2023-02-08</periodOfReport>

    <issuer>
        <issuerCik>0000749251</issuerCik>
        <issuerName>GARTNER INC</issuerName>
        <issuerTradingSymbol>IT</issuerTradingSymbol>
    </issuer>

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            <rptOwnerCik>0001674793</rptOwnerCik>
            <rptOwnerName>Hensel Scott</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>56 TOP GALLANT RD.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>STAMFORD</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06902</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>EVP Global Services &amp; Delivery</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
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                <value>Common Stock</value>
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                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
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            <transactionAmounts>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                <directOrIndirectOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
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                <transactionFormType>4</transactionFormType>
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            <transactionTimeliness></transactionTimeliness>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                </sharesOwnedFollowingTransaction>
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        </nonDerivativeTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Appreciation Rights</value>
            </securityTitle>
            <conversionOrExercisePrice>
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            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-02-08</value>
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                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
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                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <value>2025-02-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
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                </underlyingSecurityShares>
            </underlyingSecurity>
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            <transactionDate>
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                <transactionCode>M</transactionCode>
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                    <value>D</value>
                </transactionAcquiredDisposedCode>
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                <footnoteId id="F4"/>
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                    <value>4804</value>
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    <footnotes>
        <footnote id="F1">Represents shares acquired upon exercise of SARs.</footnote>
        <footnote id="F2">Represents shares withheld that had an aggregate value, based on the market price on the date of exercise, substantially equal to the aggregate exercise price of the SARs.</footnote>
        <footnote id="F3">Represents shares withheld for the payment of applicable income and payroll withholding taxes.</footnote>
        <footnote id="F4">Represents shares acquired upon the vesting of the first installment of the RSUs noted in footnote 6 on February 9, 2023. The RSUs convert into common stock on a one-for-one basis.</footnote>
        <footnote id="F5">These SARs became exercisable in four substantially equal annual installments, commencing on February 8, 2019 and are fully exercisable.</footnote>
        <footnote id="F6">These performance-based RSUs were awarded on February 9, 2022 and vest in four substantially equal annual installments, commencing on February 9, 2023. This represents the actual number of RSUs awarded after the performance metric was certified.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Kevin Tang for Scott Hensel</signatureName>
        <signatureDate>2023-02-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
