WLDN · Nasdaq · CIK 0001370450

Willdan Group, Inc.

Willdan Group, Inc.’s most recent SEC filing in our snapshot is a Form 8-K filed on Sep 23, 2026. In fiscal 2026 (year ended Jan 2, 2026) it reported revenue of $681.6M and net income of $52.6M, according to its XBRL data on EDGAR. Its EDGAR record lists 35 Form 4 insider filings from the 12 months before our last refresh.

SEC EDGAR snapshot updated Oct 27, 2026, 11:27 PM EDT. See all filings on sec.gov.

Revenue, FY2026
$681.6M
Net income, FY2026
$52.6M
Form 4 filings on record, past 12 months
35

Company overview

Legal name (as filed)
Willdan Group, Inc.
Ticker
WLDN
SEC Central Index Key (CIK)
0001370450
Industry (SIC)
Services-Engineering Services (code 8711)
Business address
ANAHEIM, CA
State or country of incorporation
DE
Fiscal year ends
January 1
SEC filer category
Large accelerated filer
Position in SEC ticker list
#2386 of the 3,000 companies we track

Five-year financial highlights

Full-year figures from Willdan Group, Inc.’s annual reports, as tagged in XBRL and published by the SEC. Amounts are in U.S. dollars; the fiscal year is named for the calendar year in which it ends.

Revenue
$353.8MFY2021$429.1MFY2022$510.1MFY2023$565.8MFY2024$681.6MFY2026
Net income
-$8.4MFY2021-$8.4MFY2022$10.9MFY2023$22.6MFY2024$52.6MFY2026
WLDN annual results
ItemFY2021
ended Dec 31, 2021		FY2022
ended Dec 30, 2022		FY2023
ended Dec 29, 2023		FY2024
ended Dec 27, 2024		FY2026
ended Jan 2, 2026
Revenue$353.8M$429.1M$510.1M$565.8M$681.6M
Net income-$8.4M-$8.4M$10.9M$22.6M$52.6M
Diluted EPS-$0.68-$0.65$0.80$1.58$3.49
Total assets$394.4M$409.7M$415.6M$464.9M$544.2M
Cash and equivalents$11.2M$8.8M$23.4M$74.2M$65.9M

XBRL tags used: revenue = RevenueFromContractWithCustomerExcludingAssessedTax; netIncome = NetIncomeLoss; assets = Assets; eps = EarningsPerShareDiluted; cash = CashAndCashEquivalentsAtCarryingValue. EPS is shown as originally reported for each year and may not be adjusted for later stock splits. A dash means the company did not report that item in a form we could match.

How to read these numbers

Revenue is the money a company brings in from selling its products and services; net income is what is left after all expenses, interest and taxes. Diluted EPS spreads net income across every share that could exist if options and convertible securities were exercised. Total assets and cash are balance-sheet figures measured on the last day of the fiscal year. For the full story — segment results, one-time charges, guidance — read Management’s Discussion and Analysis in the Form 10-K.

Latest key reports

The most recent filing of each major report type, even if it falls outside the 40 newest filings below.

WLDN latest annual, quarterly, current and proxy reports
FiledFormWhat it isOriginal
Feb 27, 202610-KAnnual report· period Jan 2, 2026Document · Index
Aug 7, 202610-QQuarterly report· period Jul 3, 2026Document · Index
Sep 23, 20268-KMaterial agreement· period Sep 22, 2026Document · Index
Apr 24, 2026DEF 14ADefinitive proxy statement· period Jun 17, 2026Document · Index

Recent SEC filings

The 40 newest documents filed by or about Willdan Group, Inc., by form type:

4 ×22144 ×58-K ×410-Q ×2SCHEDULE 13G/A ×2S-8 ×1SCHEDULE 13G ×1ARS ×1DEFA14A ×1DEF 14A ×1
WLDN recent filings
FiledFormWhat it isOriginal
Sep 23, 20268-KMaterial agreement· period Sep 22, 2026Document · Index
Sep 17, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 16, 2026Document · Index
Sep 16, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 15, 2026Document · Index
Sep 15, 2026144Notice of proposed sale of securitiesDocument · Index
Sep 9, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 8, 2026Document · Index
Sep 8, 2026144Notice of proposed sale of securitiesDocument · Index
Sep 4, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 3, 2026144Notice of proposed sale of securitiesDocument · Index
Aug 7, 202610-QQuarterly report· period Jul 3, 2026Document · Index
Aug 6, 20268-KResults of operations· period Aug 6, 2026Document · Index
Jul 30, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Jun 26, 2026S-8Registration of employee benefit plan securitiesDocument · Index
Jun 18, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 17, 2026Document · Index
Jun 18, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 17, 2026Document · Index
Jun 18, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 17, 2026Document · Index
Jun 18, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 17, 2026Document · Index
Jun 18, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 17, 2026Document · Index
Jun 18, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 17, 2026Document · Index
Jun 18, 20268-KDirector or officer change; Shareholder vote results· period Jun 17, 2026Document · Index
May 19, 2026SCHEDULE 13GPassive beneficial ownership report (over 5%)Document · Index
May 15, 20264Statement of changes in beneficial ownership (insider trade)· period May 14, 2026Document · Index
May 14, 2026144Notice of proposed sale of securitiesDocument · Index
May 14, 20264Statement of changes in beneficial ownership (insider trade)· period May 13, 2026Document · Index
May 13, 2026144Notice of proposed sale of securitiesDocument · Index
May 8, 202610-QQuarterly report· period Apr 3, 2026Document · Index
May 7, 20268-KResults of operations· period May 7, 2026Document · Index
Apr 24, 2026ARSARS· period Dec 31, 2025Document · Index
Apr 24, 2026DEFA14AAdditional proxy soliciting materialsDocument · Index
Apr 24, 2026DEF 14ADefinitive proxy statement· period Jun 17, 2026Document · Index
Mar 27, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Mar 26, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 25, 2026Document · Index
Mar 26, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 25, 2026Document · Index
Mar 26, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 25, 2026Document · Index
Mar 23, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 20, 2026Document · Index
Mar 23, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 20, 2026Document · Index
Mar 23, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 20, 2026Document · Index
Mar 19, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 17, 2026Document · Index
Mar 19, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 17, 2026Document · Index
Mar 19, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 17, 2026Document · Index
Mar 17, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 16, 2026Document · Index

Insider filing activity

35 Form 4 filings appear in Willdan Group, Inc.’s EDGAR record between Oct 28, 2025 and our last refresh. Most are reports by the company’s own directors, officers and 10% owners, but EDGAR also lists a Form 4 under a company when the company itself is the insider — for example, when it owns more than 10% of another public company. Foreign private issuers’ own insiders generally do not file Form 4. A high count is not by itself a signal: many Form 4s report routine stock awards, tax withholding or sales under pre-arranged Rule 10b5-1 plans. Open each filing to see the transaction code, share count and price. What a Form 4 shows.

Other companies in Services-Engineering Services

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Source

  • U.S. Securities and Exchange Commission, EDGAR submissions for CIK 0001370450 and XBRL company facts. Willdan Group, Inc. on EDGAR.
  • Snapshot updated Oct 27, 2026, 11:27 PM EDT. The SEC does not endorse OpenFilings. Company names and tickers are used only to identify the filer; no logos are shown.

Not investment advice. This page summarizes public SEC filings for information only. Figures may contain errors or omissions; confirm everything in the original filing before relying on it.