California Water Service Group Officer Michael B. Luu Disposes of Shares for Tax Withholding

Michael B. Luu, Senior Vice President of Corporate Services & Chief Risk Officer at California Water Service Group, filed a Form 4 disclosing two separate dispositions of company common stock to cover tax withholding obligations related to vested restricted stock awards. On June 4, 2026, Luu disposed of 70 shares at $45.24 per share, reducing his holdings to 23,875.765 shares. The following day, June 5, 2026, he disposed of an additional 69 shares at $45.82 per share, bringing his total ownership to 23,806.765 shares. Both transactions were coded as "F" (tax withholding) and represent shares surrendered to the company to satisfy tax obligations arising from the vesting of restricted stock awards granted in March 2025 and June 2024 respectively. The filing indicates these are routine transactions related to equity compensation rather than discretionary sales.