<SEC-DOCUMENT>0001020859-17-000125.txt : 20170928
<SEC-HEADER>0001020859-17-000125.hdr.sgml : 20170928
<ACCEPTANCE-DATETIME>20170928165841
ACCESSION NUMBER:		0001020859-17-000125
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170926
FILED AS OF DATE:		20170928
DATE AS OF CHANGE:		20170928

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:		171108130

	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:			0730

	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_150663230728048.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-09-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <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>President, CEO &amp; Chairman</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-09-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>47267</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>158935</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-09-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>29561</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>188496</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-09-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F4"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>37674</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>44.39</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>150822</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>651</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Vested Performance Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2017-09-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F6"/>
                <footnoteId id="F7"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>23345</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F6"/>
                <footnoteId id="F7"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
                <footnoteId id="F7"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Vested Performance Units</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>23345.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>23345</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On September 21, 2016, the reporting person was granted 47,032 performance units eligible to vest at target levels of performance (with vesting of more or less shares possible based on actual performance)  based on the extent to which certain EPS, Adjusted EBITDA, Adjusted ROIC and total shareholder return performance targets were met for fiscal 2017.  Based upon the performance of United Natural Foods, Inc. (the &quot;Company&quot;) against the applicable performance targets, 47,267 performance units subject to such criteria vested on September 26, 2017, resulting in the reporting person being entitled to receive 47,267 shares of the Company's common stock before the impact of any withholding taxes which, as described in footnote 4, were satisfied by withholding a portion of the shares issuable to the reporting person.</footnote>
        <footnote id="F2">Performance stock units 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">On October 27, 2016, the reporting person was granted 27,500 performance units eligible to vest at target level of performance (with vesting of more or less shares possible based on actual performance)  based on the extent to which certain EPS, Net Sales and Adjusted EBITDA performance targets were met for fiscal 2017.  Based upon the Company's performance against the applicable performance targets, 29,561 performance units subject to such criteria vested on September 26, 2017, resulting in the reporting person becoming entitled to receive 29,561 shares of the Company's common stock before the impact of any withholding taxes which, as described in footnote 4, were satisfied by withholding a portion of the shares issuable to the reporting person.</footnote>
        <footnote id="F4">As described in footnotes 1, 3, 6 and 7, on September 26, 2017, the reporting person became entitled to receive 101,014 shares of Company common stock in settlement of a like number of performance units. The Company retained 37,674 of these shares on that date to satisfy certain tax withholding obligations in connection with the vesting.</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 26, 2017.</footnote>
        <footnote id="F6">On October 27, 2016, the reporting person was granted 22,500 performance units eligible to vest at target level of performance (with vesting of more or less shares possible based on actual performance)  based on the extent to which certain EPS, Net Sales and Adjusted EBITDA performance targets were met for fiscal 2017.  Based upon the Company's performance against the applicable performance targets, 24,186 performance units subject to such criteria vested on September 26, 2017, resulting in the reporting person becoming entitled to receive 24,186 shares of the Company's common stock before the impact of any withholding taxes which, as described in footnote 4, were satisfied by withholding a portion of the shares issuable to the reporting person.</footnote>
        <footnote id="F7">The 24,186 shares of the Company's common stock that are issuable to the reporting person as a result of the vesting of the performance units on September 26, 2017 (before the impact of any withholding taxes which, as described in footnote 4, were satisfied by withholding a portion of the shares issuable to the reporting person) 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. Accordingly, these shares, net of the shares used to pay the withholding taxes, are being reported in Table II.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Joseph McGrail, Power-of-Attorney, in fact</signatureName>
        <signatureDate>2017-09-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
