<SEC-DOCUMENT>0001179110-21-003738.txt : 20210323
<SEC-HEADER>0001179110-21-003738.hdr.sgml : 20210323
<ACCEPTANCE-DATETIME>20210323181138
ACCESSION NUMBER:		0001179110-21-003738
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210311
FILED AS OF DATE:		20210323
DATE AS OF CHANGE:		20210323

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Procell Adam C
		CENTRAL INDEX KEY:			0001588202

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33076
		FILM NUMBER:		21765905

	MAIL ADDRESS:	
		STREET 1:		C/O WILLDAN
		STREET 2:		12401 EAST KATELLA AVENUE, SUITE 300
		CITY:			ANAHEIM
		STATE:			CA
		ZIP:			92806

	FORMER NAME:	
		FORMER CONFORMED NAME:	Procell C Adam
		DATE OF NAME CHANGE:	20131001

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Willdan Group, Inc.
		CENTRAL INDEX KEY:			0001370450
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ENGINEERING SERVICES [8711]
		IRS NUMBER:				141951112
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0101

	BUSINESS ADDRESS:	
		STREET 1:		2401 EAST KATELLA AVENUE, SUITE 300
		CITY:			ANAHEIM
		STATE:			CA
		ZIP:			92806
		BUSINESS PHONE:		800-424-9144

	MAIL ADDRESS:	
		STREET 1:		2401 EAST KATELLA AVENUE, SUITE 300
		CITY:			ANAHEIM
		STATE:			CA
		ZIP:			92806
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
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        <issuerName>Willdan Group, Inc.</issuerName>
        <issuerTradingSymbol>WLDN</issuerTradingSymbol>
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            <rptOwnerStreet2>SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>ANAHEIM</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92806</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Strategy Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <directOrIndirectOwnership>
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            <securityTitle>
                <value>Common Stock</value>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
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                    <footnoteId id="F1"/>
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                    <value>45.97</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19002</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of Common Stock sold in the open market, the proceeds of which were used to pay the tax withholding obligations incurred upon the vesting of performance-based restricted stock units on March 10, 2021.</footnote>
        <footnote id="F2">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $44.97 to $45.95, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) and footnotes (4) through (12).</footnote>
        <footnote id="F3">Includes 15,000 shares of restricted stock that vest in three equal installments on each of June 10, 2021, June 10, 2022 and June 10, 2023, subject to the Reporting Person's continued service to the Issuer through the applicable vesting date.</footnote>
        <footnote id="F4">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $46.00 to $46.99, inclusive.</footnote>
        <footnote id="F5">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $47.05 to $47.89, inclusive.</footnote>
        <footnote id="F6">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $45.91 to $46.87, inclusive.</footnote>
        <footnote id="F7">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $47.05 to $47.97, inclusive.</footnote>
        <footnote id="F8">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $48.12 to $49.00, inclusive.</footnote>
        <footnote id="F9">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $49.23 to $50.20, inclusive.</footnote>
        <footnote id="F10">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $50.28 to $50.76, inclusive.</footnote>
        <footnote id="F11">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $45.84 to $46.67, inclusive.</footnote>
        <footnote id="F12">The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $46.84 to $47.80, inclusive.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Stacy McLaughlin, Attorney-in-fact for Adam C. Procell</signatureName>
        <signatureDate>2021-03-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
