<SEC-DOCUMENT>0001104659-26-048623-index.html : 20260424
<SEC-HEADER>0001104659-26-048623.hdr.sgml : 20260424
<ACCEPTANCE-DATETIME>20260424162626
ACCESSION NUMBER:		0001104659-26-048623
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20260424
DATE AS OF CHANGE:		20260424

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Willdan Group, Inc.
		CENTRAL INDEX KEY:			0001370450
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ENGINEERING SERVICES [8711]
		ORGANIZATION NAME:           	07 Trade & Services
		EIN:				141951112
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0101

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33076
		FILM NUMBER:		26894562

	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>DEFA14A
<SEQUENCE>1
<FILENAME>wldn-20260424xdefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: wldn-20260424xdefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>wldn-20260424xdefa14a_bg001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: wldn-20260424xdefa14a_bg001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>wldn-20260424xdefa14a_bg002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: wldn-20260424xdefa14a_bg002.jpg

</DOCUMENT>
</SEC-DOCUMENT>