California Water Service Group VP Sells 41 Shares for Tax Withholding

This Form 4 filing reports that Kristan A. Hamner, Vice President and Chief Human Resource Officer of California Water Service Group (CWT), sold 41 shares of common stock on June 4, 2026. The transaction was coded as "F" (tax withholding) with a price of $45.24 per share, representing shares withheld and surrendered to satisfy tax withholding obligations arising from the vesting of a Restricted Stock Award granted on March 4, 2025. Following this disposition, Hamner owns 3,003.819 shares, which includes shares acquired through the Employee Stock Purchase Program. The filing was signed on June 8, 2026, by Michelle R. Mortensen on behalf of Kristan Hamner. This is a routine transaction related to equity compensation tax obligations rather than a discretionary sale by the executive.