Insider Transaction Report for James Patrick Lynch

This filing details two non-derivative transactions by James Patrick Lynch, SVP CFO and Treasurer of CALIFORNIA WATER SERVICE GROUP. On September 4, 2026, Lynch disposed of 50 shares of Common Stock at a price of $50.03 per share, resulting in 6533.53 shares owned post-transaction. This transaction was related to tax withholding obligations for a Restricted Stock Award vesting on March 4, 2025. On September 5, 2026, Lynch disposed of an additional 48 shares of Common Stock at the same price of $50.03 per share, leaving him with 6485.53 shares. This second transaction was related to tax withholding obligations for a Restricted Stock Award vesting on June 5, 2024. Both transactions were marked as direct ownership and were part of the Form 4 filing.