Willdan Group, Inc.

For the period ended Apr 3, 2026. Filed May 8, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Apr 3, 2026 · Filed May 8, 2026

WLDN$68.91+4.1%Stored close · as of Nov 9, 2026

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Contents

Item 6. Exhibits


ExhibitNumber		Exhibit Description
2.1‡		Stock Purchase Agreement, dated as of March 3, 2025, by and among Willdan Group, Inc., Willdan Energy Solutions, Inc. and each of the stockholders of APG. (incorporated by reference to Exhibit 2.1 to Willdan Group, Inc.’s Quarterly Report on Form 10-Q, filed with the SEC on May 9, 2025).
2.2‡		Equity Purchase Agreement, dated as of May 4, 2026, by and among Willdan Group, Inc., Willdan Energy Solutions, Inc., and each of the shareholders of Burton Energy Group, LLC.
3.1		First Amended and Restated Certificate of Incorporation of Willdan Group, Inc. (incorporated by reference to Willdan Group, Inc.’s Registration Statement on Form S-1, filed with the SEC on August 9, 2006, as amended (File No. 333-136444)).
3.2		Second Amended and Restated Bylaws of Willdan Group, Inc. (incorporated by reference to Exhibit 3.1 to Willdan Group, Inc.’s Current Report on Form 8-K, filed with the SEC on July 12, 2023).
4.1		Specimen Stock Certificate for shares of the Registrant’s Common Stock (incorporated by reference to Willdan Group, Inc.’s Registration Statement on Form S-1, filed with the SEC on August 9, 2006, as amended (File No. 333-136444)).
4.2		The Company agrees to furnish to the Securities and Exchange Commission upon request a copy of each instrument with respect to issues of long-term debt of Willdan Group, Inc. and its subsidiaries, the authorized principal amount of which does not exceed 10% of the consolidated assets of Willdan Group, Inc. and its subsidiaries.
31.1*		Certification of Chief Executive Officer pursuant to Rule 13a-14(a) or 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to § 302 of the Sarbanes-Oxley Act of 2002.
31.2*		Certification of Chief Financial Officer pursuant to Rule 13a-14(a) or 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to § 302 of the Sarbanes-Oxley Act of 2002.
32.1**		Certifications of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002.
101.INS*		Inline XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document)
101.SCH*		Inline XBRL Taxonomy Extension Schema Document
101.CAL*		Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*		Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*		Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE*		Inline XBRL Taxonomy Extension Presentation Linkbase Document
104*		Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*	Filed herewith.

**	Furnished herewith.

‡	Portions of the referenced exhibit have been omitted pursuant to Item 601(b) of Regulation S-K because it (i) is not material and (ii) is the type of information the Company customarily treats as private or confidential.

¥	All schedules and exhibits were omitted pursuant to Item 601(a)(5) of Regulation S-K.

†Indicates a management contract or compensating plan or arrangement

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


	WILLDAN GROUP, INC.

	/s/ Creighton K. Early
	Creighton K. Early
	Chief Financial Officer and Executive Vice President
	(Principal Financial Officer, Principal Accounting Officer and duly authorized officer)
	May 7, 2026

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