<SEC-DOCUMENT>0001020859-19-000126.txt : 20191003
<SEC-HEADER>0001020859-19-000126.hdr.sgml : 20191003
<ACCEPTANCE-DATETIME>20191003171534
ACCESSION NUMBER:		0001020859-19-000126
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20191001
FILED AS OF DATE:		20191003
DATE AS OF CHANGE:		20191003

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SPINNER STEVEN
		CENTRAL INDEX KEY:			0001207897

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15723
		FILM NUMBER:		191136612

	MAIL ADDRESS:	
		STREET 1:		C/O UNITED NATURAL FOODS, INC.
		STREET 2:		260 LAKE ROAD
		CITY:			DAYVILLE
		STATE:			CT
		ZIP:			06241

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED NATURAL FOODS INC
		CENTRAL INDEX KEY:			0001020859
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-GROCERIES & GENERAL LINE [5141]
		IRS NUMBER:				050376157
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0803

	BUSINESS ADDRESS:	
		STREET 1:		313 IRON HORSE WAY
		CITY:			PROVIDENCE
		STATE:			RI
		ZIP:			02908
		BUSINESS PHONE:		401-528-8634

	MAIL ADDRESS:	
		STREET 1:		313 IRON HORSE WAY
		CITY:			PROVIDENCE
		STATE:			RI
		ZIP:			02908
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_157013731245911.xml
<DESCRIPTION>FORM 4
<TEXT>
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    <periodOfReport>2019-10-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001020859</issuerCik>
        <issuerName>UNITED NATURAL FOODS INC</issuerName>
        <issuerTradingSymbol>UNFI</issuerTradingSymbol>
    </issuer>

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            <rptOwnerCik>0001207897</rptOwnerCik>
            <rptOwnerName>SPINNER STEVEN</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O UNITED NATURAL FOODS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>313 IRON HORSE WAY</rptOwnerStreet2>
            <rptOwnerCity>PROVIDENCE</rptOwnerCity>
            <rptOwnerState>RI</rptOwnerState>
            <rptOwnerZipCode>02908</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO &amp; Chairman</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>1799</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
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                <transactionAcquiredDisposedCode>
                    <value>A</value>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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                <sharesOwnedFollowingTransaction>
                    <value>211600</value>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
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            <ownershipNature>
                <directOrIndirectOwnership>
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                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F5"/>
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        </nonDerivativeHolding>
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    <derivativeTable>
        <derivativeTransaction>
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                <transactionFormType>4</transactionFormType>
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                <transactionShares>
                    <value>38793</value>
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                <transactionPricePerShare>
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                <underlyingSecurityTitle>
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                    <value>38793</value>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        <derivativeTransaction>
            <securityTitle>
                <value>Vested Performance Units</value>
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                <footnoteId id="F2"/>
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                <value>2019-10-02</value>
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                <transactionFormType>4</transactionFormType>
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                <footnoteId id="F6"/>
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                <transactionShares>
                    <value>1325</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>8.17</value>
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                    <value>D</value>
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                <footnoteId id="F6"/>
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                <footnoteId id="F6"/>
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                <underlyingSecurityTitle>
                    <value>Vested Performance Units</value>
                </underlyingSecurityTitle>
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                    <value>1325.0</value>
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            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>37468</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Reflects the number of performance units (&quot;PSUs&quot;) earned after the Compensation Committee's certification to the achievement of performance under the terms of a PSU award granted on September 15, 2017.</footnote>
        <footnote id="F2">PSUs are settled in shares of common stock on a one-for-one basis. Accordingly, there was no purchase price paid by the reporting person.</footnote>
        <footnote id="F3">Reflects the number of PSUs earned after the Compensation Committee's certification to the achievement of performance under the terms of a PSU award granted on October 27, 2016.</footnote>
        <footnote id="F4">Shares retained by the Company to satisfy certain tax withholding obligations in connection with the vesting of PSUs.</footnote>
        <footnote id="F5">Includes 651 shares of common stock allocated to the reporting person under the United Natural Foods, Inc. 401(k) Plan's UNFI Stock Fund as of September 15, 2019.</footnote>
        <footnote id="F6">Represents the portion of PSUs earned after the Compensation Committee's certification to the achievement of performance under the terms of a PSU award granted on October 27, 2016, which are not payable to the reporting person until the termination of the reporting person's employment with the Company or, if earlier, immediately prior to consummation of a change in control of the Company. 1,325 shares are being converted to common stock and retained by the Company to satisfy certain tax withholding obligations in connection with the vesting of these PSUs.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Jill E. Sutton, Power-of-Attorney, in fact</signatureName>
        <signatureDate>2019-10-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
