Willdan Group, Inc. — Director's Dealing 2026

Mar 17, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Willdan Group, Inc. (WLDN)
CIK: 0001370450
Period of Report: 2026-03-16

Reporting Person: CHEN MICAH (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-03-16	Common Stock	A	4158	—	Acquired	51047	Direct
2026-03-16	Common Stock	F	1826	$78.61	Disposed	49221	Direct

Footnotes

F1: Represents performance-based restricted stock units previously granted to the Reporting Person by the Issuer on March 17, 2025. The performance conditions applicable to the award were determined to have been satisfied by the Issuer's Compensation Committee effective on March 16, 2026, resulting in the immediate vesting of the restricted stock units as to 4,158 shares of Common Stock.

F2: Includes (i) 4,500 shares of restricted stock units that vest in three substantially equal installments on each of March 3, 2027, March 3, 2028 and March 3, 2029, (ii) 4,620 shares of restricted stock units that vest in three substantially equal installments on each of March 17, 2026, March 17, 2027 and March 17, 2028, and (iii) 2,800 shares of restricted stock units that vest in two substantially equal installments on each of March 20, 2026 and March 20, 2027, subject to the Reporting Person's continued service to the Issuer through the applicable vesting date.

F3: Represents shares of the Issuer's Common Stock withheld to satisfy tax withholding obligations in connection with the vesting of the performance-based restricted stock units referenced in footnote (1).