144 0001495768 XXXXXXXX LIVE 0001035201 CALIFORNIA WATER SERVICE GROUP 001-13883 1720 N FIRST ST C/O CALIFORNIA WATER SERVICE CO SAN JOSE CA 95112 4083678200 Krummel Thomas M Director Common stock Charles Schwab & Co., Inc.

3000 Schwab Way Westlake TX 76262

3700 184926.00 61839101 08/13/2026 NYSE Common Stock 11/19/2019 Restricted Stock Vesting Issuer N 3700 11/19/2019 Services Rendered N Thomas & Susan Krummel Fam Tr dtd 4/16/2001, Thomas & Susan Krummel TTEES

C/O 1720 North First Street San Jose CA 95112

Common Stock 05/21/2026 3700 160214.44 2a) Thomas & Susan Krummel Fam Tr 4/16/2001, Thomas & Susan Krummel TTEES 08/13/2026 Thomas Krummel TTEE for Thomas & Susan Krummel Fam Tr 4/16/2001