# EDGAR Filing Document

**Accession Number:** 0001370450
**File Stem:** 0001104659-26-048632
**Filing Date:** 2026-4
**Character Count:** 1158
**Document Hash:** 137cb4f64370d8f20ef4c7a2a5968b9e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-048632.hdr.sgml**: 20260424

**ACCESSION NUMBER**: 0001104659-26-048632

**CONFORMED SUBMISSION TYPE**: ARS

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260424

**DATE AS OF CHANGE**: 20260424

**EFFECTIVENESS DATE**: 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:** ARS
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33076
- **FILM NUMBER:** 26894789

**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

### Attached PDF Documents

**Attachment 1:** `wldn-20251231xars.pdf`

_No text found in this document._