Thomas D. Brisbin - Aug 25, 2025 Form 4 Insider Report for Willdan Group, Inc. (WLDN)

Role: Director
Signature: /s/ Creighton K. Early, Attorney-in-Fact for Thomas D. Brisbin
Stock symbol: WLDN
Transactions as of: Aug 25, 2025
Transactions value $: -$527,942
Form type: 4
Date filed: 8/26/2025, 05:45 PM
Previous filing: Aug 26, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Brisbin Thomas Donald	Director	2401 EAST KATELLA AVENUE, SUITE 300, ANAHEIM	/s/ Creighton K. Early, Attorney-in-Fact for Thomas D. Brisbin	2025-08-26	0001395188

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WLDN	Common Stock	Options Exercise	$84.3K	+5.18K	+7.33%	$16.27	75.9K	Aug 25, 2025	Direct	F1
transaction	WLDN	Common Stock	Sale	-$612K	-5.18K	-6.83%	$118.15	70.7K	Aug 25, 2025	Direct	F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	WLDN	Stock Options (Right to Buy)	Options Exercise	$0	-5.18K	-5.46%	$0.00	89.7K	Aug 25, 2025	Common Stock	5.18K	$16.27	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes (i) 1,781 shares of restricted stock that vest on June 11, 2026, (ii) 1,124 shares of restricted stock that vest on June 12, 2026, and (iii) 5,834 shares of restricted stock that vest on March 7, 2026, subject to the Reporting Person's continued service to the Issuer through the applicable vesting date.
F2	The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $118.07 to $118.38, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2).
F3	Stock options granted under the Willdan Group, Inc. Amended and Restated 2008 Performance Incentive Plan, which vested in three equal installments on each of November 3, 2017, November 3, 2018 and November 3, 2019.