<SEC-DOCUMENT>0000900440-20-000046.txt : 20200430
<SEC-HEADER>0000900440-20-000046.hdr.sgml : 20200430
<ACCEPTANCE-DATETIME>20200430113106
ACCESSION NUMBER:		0000900440-20-000046
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200428
FILED AS OF DATE:		20200430
DATE AS OF CHANGE:		20200430

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Randt Clark T. Jr.
		CENTRAL INDEX KEY:			0001456799

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31429
		FILM NUMBER:		20833976

	MAIL ADDRESS:	
		STREET 1:		ONE VALMONT PLAZA
		STREET 2:		13815 FIRST NATIONAL BANK PARKWAY
		CITY:			OMAHA
		STATE:			NE
		ZIP:			68154

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VALMONT INDUSTRIES INC
		CENTRAL INDEX KEY:			0000102729
		STANDARD INDUSTRIAL CLASSIFICATION:	FABRICATED STRUCTURAL METAL PRODUCTS [3440]
		IRS NUMBER:				470351813
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1226

	BUSINESS ADDRESS:	
		STREET 1:		ONE VALMONT PLAZA
		CITY:			OMAHA
		STATE:			NE
		ZIP:			68154
		BUSINESS PHONE:		402-963-1000

	MAIL ADDRESS:	
		STREET 1:		ONE VALMONT PLAZA
		CITY:			OMAHA
		STATE:			NE
		ZIP:			68154

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	VALLEY MANUFACTURING CO
		DATE OF NAME CHANGE:	19680822
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-04-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000102729</issuerCik>
        <issuerName>VALMONT INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>VMI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001456799</rptOwnerCik>
            <rptOwnerName>Randt Clark T. Jr.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>VALMONT INDUSTRIES, INC</rptOwnerStreet1>
            <rptOwnerStreet2>ONE VALMONT PLAZA</rptOwnerStreet2>
            <rptOwnerCity>OMAHA</rptOwnerCity>
            <rptOwnerState>NE</rptOwnerState>
            <rptOwnerZipCode>68154</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-04-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1147</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8686</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Restricted stock unit award which vests on the anniversary of the grant date, unless deferred by reporting person, and on vesting settled in an equal number of shares of common stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ R. Andrew Massey for Clark T. Randt, Jr.</signatureName>
        <signatureDate>2020-04-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
