X0508 4 2025-06-05 0001035201 CALIFORNIA WATER SERVICE GROUP CWT 0001629475 Dean Shannon C 1720 NORTH FIRST STREET SAN JOSE CA 95112 1 SR. VP, Cust Svc & Chief Sust. 0 Common Stock 2025-06-05 4 F 0 71 45.85 D 22365 D Represents the number of shares withheld by and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the Restricted Stock (RSA) Award 796 /s/ Michelle Mortensen on behalf of Shannon Dean 2025-06-09