X0306 4 2023-03-07 0001035201 CALIFORNIA WATER SERVICE GROUP CWT 0001668263 Ouyang Elissa Y 1720 NORTH FIRST STREET SAN JOSE CA 95112 1 Chief Procurement & Lead CI Common Stock 2023-03-07 4 A 0 1275 58.83 A 9198.37 D Restricted stock granted 03/07/2023 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3. RSA vests with a one-third on March 7, 2024, with the remaining 2/3 vesting quarterly over the succeeding 24 months. /s/ Michelle R. Mortensen on behalf of Elissa Y Ouyang 2023-03-09