X0306 4 2015-03-05 0 0001035201 CALIFORNIA WATER SERVICE GROUP cwt 0001340561 Rossi Michael J C/O CALIFORNIA WATER SERVICE GROUP 1720 NORTH FIRST STREET SAN JOSE CA 95112 0 1 0 0 VP, Continuous Improvement Common Stock 2015-03-05 4 F 0 36 24.53 D 29205 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 vesting of the Restricted Stock Award (RSA) Award #268. Michelle Mortensen 2015-03-05