BIEBER MICHAEL A 4

What Happened Michael A. Bieber, President, CEO and a director of Willdan Group, had 2,625 shares of the company's common stock withheld to satisfy tax-withholding obligations in connection with the vesting of restricted stock units. The shares were valued at $78.29 each for a total of $205,511. This transaction is a disposition by tax withholding (transaction code F), not an open-market sale.

Key Details

• Transaction date: March 17, 2026; Form 4 filed March 19, 2026 (filed within the typical 2-business-day window).
• Price and value: 2,625 shares withheld at $78.29/share = $205,511.
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Footnote F1: The withheld shares satisfied tax obligations on RSUs that vested March 17, 2026; those RSUs were originally granted March 17, 2025.
• Footnote F2: Remaining unvested RSUs include: 18,000 RSUs vesting in three installments (March 3, 2027–2029); 12,834 RSUs vesting in two installments (March 17, 2027 & 2028); and 11,667 RSUs vesting in two installments (March 20, 2026 & 2027), subject to continued service.

Context Tax-withholding dispositions are routine when restricted stock units vest — the company withholds a portion of shares to cover payroll/tax obligations. These transactions do not necessarily indicate a decision by the insider to sell shares on the market and are typically treated differently by investors than open-market sales.