WLDN

EX-99.1

2 wldn-20260507xex99d1.htm

EX-99.1

Exhibit 99.1

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Willdan Group Reports

First Quarter Results ​

ANAHEIM, Calif. –May 7, 2026 – Willdan Group, Inc. (“Willdan”) (Nasdaq: WLDN) today announced its financial results for the first quarter ended April 3, 2026.

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The first quarter of fiscal 2026 had one fewer week than the first quarter of fiscal 2025, thus normalized results are also presented.

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First Quarter 2026 Highlightsa

●Contract revenue of $155.1 million, up 1.8% (up 9.6% normalized).

●Net revenueb of $92.4 million, up 8.3% (up 16.6% normalized).

●Net income of $8.5 million, up 82.0% (up 96.0% normalized).

●Adjusted EBITDAb of $18.1 million, up 25.4% (up 35.0% normalized).

●GAAP Diluted EPS of $0.55, up 71.9%.

●Adjusted Diluted EPSb of $0.91, up 44.4%.

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Executive Management Comments

“We are off to a strong start in 2026,” said Mike Bieber, Willdan’s President and Chief Executive Officer. “The results reflect strong demand for our energy solutions, with margin expansion driven by improved productivity and increased commercial customer mix. Subsequent to quarter end, and announced earlier this week, we completed the acquisition of Burton Energy Group, which serves the Fortune 500 and more than doubles our services to the commercial market. Burton is a management consultant and solutions provider that strengthens our national presence, deepens our energy efficiency capabilities and adds energy procurement. Reflecting the strength of our underlying business and outlook, we are raising our 2026 financial targets and long-term margin goal. We now expect 2026 Adjusted EBITDA growth to increase by 26% to 32% year over year.”

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Fiscal Year 2026 Financial Targets

●Net Revenueb between $410 million and $425 million.

●Adjusted EBITDAb between $100 million and $105 million.

●Adjusted Diluted EPSb between $4.90 per share and $5.05 per share.

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Assumes 15.9 million diluted shares, 0% effective tax rate, and no future acquisitions.

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Long-Term Financial Goals

●Revenue and Net Revenue 15%-20% annual growth including acquisitions.

●Annual Adjusted EBITDA to Net Revenue margin in the high 20s%.

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a. As compared to the same period of fiscal year 2025. Normalized to reflect the 13-week first quarter of fiscal 2026 versus the 14-week first quarter of fiscal 2025. b. See “Use of Non-GAAP Financial Measures” below.

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First Quarter 2026 Conference Call

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Willdan will be hosting a conference call to discuss its first quarter financial results today, at 5:30 p.m. Eastern/2:30 p.m. Pacific. To access the call, listeners should dial 877-407-2988 (or 201-389-0923). The conference call will be webcast simultaneously on Willdan’s website at https://edge.media-server.com/mmc/p/7q4crris/.

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A replay of the conference call will be available through Willdan’s website at https://ir.willdangroup.com/news-events/event-calendar.

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About Willdan Group, Inc.

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Willdan Group, Inc. is a technical services company focused on energy and infrastructure solutions. The Company’s solutions include energy planning and analytics, consulting, software, public finance, engineering, and program implementation. Willdan serves utilities, state and local governments, and commercial customers in the United States and Canada. For additional information, visit Willdan's website at www.willdan.com.

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Use of Non-GAAP Financial Measures

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“Net Revenue,” defined as contract revenue as reported in accordance with U.S. generally accepted accounting principles (“GAAP”) minus subcontractor services and other direct costs, is a non-GAAP financial measure. Net Revenue is a supplemental measure that Willdan believes enhances investors’ ability to analyze Willdan’s business trends and performance because it substantially measures the work performed by Willdan’s employees. In the course of providing services, Willdan routinely subcontracts various services. Generally, these subcontractor services and other direct costs are passed through to Willdan’s clients and, in accordance with GAAP and industry practice, are included in Willdan’s revenue when it is Willdan’s contractual responsibility to procure or manage such subcontracted activities. Because subcontractor services and other direct costs can vary significantly from project to project and period to period, changes in revenue may not necessarily be indicative of Willdan’s business trends. Accordingly, Willdan segregates subcontractor services and other direct costs from revenue to promote a better understanding of Willdan’s business by evaluating revenue exclusive of subcontract services and other direct costs associated with external service providers. A reconciliation of Willdan’s contract revenue as reported in accordance with GAAP to Net Revenue is provided at the end of this press release. A reconciliation of targeted contract revenue for fiscal year 2026 as reported in accordance with GAAP to targeted Net Revenues for fiscal year 2026, which is a forward-looking

WILLDAN GROUP, INC._February 26, 2026 0001370450false00013704502026-02-262026-02-26 ​ ​

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC  20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 ​ Date of Report (Date of earliest event reported): February 26, 2026

WILLDAN GROUP, INC.

(Exact name of registrant as specified in its charter) ​

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Delaware ​ ​ ​ 001-33076 ​ ​ ​ 14-1951112

(State of other jurisdiction of incorporation) ​ (Commission File Number) ​ (IRS Employer Identification No.)

​ 2401 East Katella Avenue, Suite 300, Anaheim, California 92806 (Address of Principal Executive Offices) ​ Registrant’s telephone number, including area code: (800) 424-9144 ​ Not Applicable (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ​

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425).

​ ​

☐ Soliciting material pursuant to Rule 14A-12 under the Exchange Act (17 CFR 240.14a-12)

​ ​

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR.14d-2(b))

​ ​

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

​ Securities registered pursuant to Section 12(b) of the Act: ​

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, par value $0.01 per share

WLDN

The Nasdaq Stock Market LLC (Nasdaq Global Market)

​ Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐ ​ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ ​ ​ ​

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Item 2.02             Results of Operations and Financial Condition

Willdan Group, Inc. (“Willdan”) issued a press release on February 26, 2026. The press release announced Willdan’s financial results for the fourth quarter and fiscal year ended January 2, 2026. A copy of the press release is attached as Exhibit 99.1 hereto and is hereby incorporated herein by reference in its entirety. The information in this Item 2.02 and the attached Exhibit 99.1 to this Current Report on Form 8-K is being furnished (not filed) pursuant to Item 2.02 of Form 8-K.

Item 9.01             Financial Statements and Exhibits

(d)          Exhibits.

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Exhibit No.

Document

99.1

Press Release of Willdan Group, Inc. dated February 26, 2026. ​

104 ​

Cover Page Interactive Data File (embedded within the inline XBRL document).

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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WILLDAN GROUP, INC.

Date: February 26, 2026 By: /s/ Creighton K. Early

Creighton K. Early

Chief Financial Officer and Executive Vice President (Principal Financial Officer)

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WILLDAN GROUP, INC._November 6, 2025 0001370450false00013704502025-11-062025-11-06 ​ ​

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC  20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 ​ Date of Report (Date of earliest event reported): November 6, 2025

WILLDAN GROUP, INC.

(Exact name of registrant as specified in its charter) ​

​

​

Delaware

001-33076

14-1951112

(State of other jurisdiction of incorporation) ​ (Commission File Number) ​ (IRS Employer Identification No.)

​ 2401 East Katella Avenue, Suite 300, Anaheim, California 92806 (Address of Principal Executive Offices) ​ Registrant’s telephone number, including area code: (800) 424-9144 ​ Not Applicable (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ​

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425).

​ ​

☐ Soliciting material pursuant to Rule 14A-12 under the Exchange Act (17 CFR 240.14a-12)

​ ​

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR.14d-2(b))

​ ​

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

​ Securities registered pursuant to Section 12(b) of the Act: ​

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, par value $0.01 per share

WLDN

The Nasdaq Stock Market LLC (Nasdaq Global Market)

​ Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐ ​ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ ​ ​ ​

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Item 2.02             Results of Operations and Financial Condition

Willdan Group, Inc. (“Willdan”) issued a press release on November 6, 2025. The press release announced Willdan’s financial results for the third quarter ended October 3, 2025. A copy of the press release is attached as Exhibit 99.1 hereto and is hereby incorporated herein by reference in its entirety. The information in this Item 2.02 and the attached Exhibit 99.1 to this Current Report on Form 8-K is being furnished (not filed) pursuant to Item 2.02 of Form 8-K.

Item 9.01             Financial Statements and Exhibits

(d)          Exhibits.

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Exhibit No.

Document

99.1

Press Release of Willdan Group, Inc. dated November 6, 2025. ​

104 ​

Cover Page Interactive Data File (embedded within the inline XBRL document).

​ ​ ​ ​

​ ​

2

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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WILLDAN GROUP, INC.

Date: November 6, 2025 By: /s/ Creighton K. Early

Creighton K. Early

Chief Financial Officer and Executive Vice President (Principal Financial Officer)

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