BIEBER MICHAEL A 4

What Happened
Michael A. Bieber, President, CEO and Director of Willdan Group, had 2,387 shares of the company's common stock disposed/withheld on March 20, 2026 at $75.52 per share, resulting in proceeds of $180,266. The disposition is coded F — payment of tax liability via share withholding — related to the vesting of restricted stock units (RSUs).

Key Details

• Transaction date: March 20, 2026; filing date: March 23, 2026 (filed within the required reporting window).
• Price and amount: 2,387 shares withheld at $75.52 each; total value $180,266.
• Transaction code: F (shares withheld to satisfy tax withholding on vested awards).
• Footnote F1: These shares were withheld to satisfy tax obligations for RSUs that vested March 20, 2026; the RSUs were originally granted March 20, 2024.
• Footnote F2: Remaining unvested RSUs described in filing: 18,000 shares vest in three substantially equal installments on Mar 3 of 2027–2029; 12,834 shares vest in two substantially equal installments on Mar 17, 2027 and Mar 17, 2028; and 5,834 shares vest on Mar 20, 2027 — all subject to continued service.
• Shares owned after the transaction: Not specified in the provided filing details.

Context
This was not an open-market sale expressing a trading decision but a routine tax-withholding action when RSUs vested (a common cashless settlement method). Such withholdings reduce reported holdings but generally reflect compensation vesting rather than a directional insider trade.