California Water Service Group (CWT) investor relations material

Executive summary

• Achieved record $517 million investment in water and wastewater infrastructure, growing rate base by 11.5% to $2.64 billion in 2025.

• Increased annual dividend by 10.71% to $1.24 per share, including a special one-time dividend.

• Met or surpassed all water quality standards and constructed two PFAS treatment plants, with 26 more in design.

• Entered agreement to own and operate wastewater and recycled water systems in San Bernardino County, with potential to serve up to 15,000 customers.

• 10-year total shareholder return (TSR) of 120.3%, aligning with the median of major regulated water utilities.

Voting matters and shareholder proposals

• Board recommends voting “FOR” the election of 11 directors, advisory vote on executive compensation, and ratification of the independent registered public accounting firm.

Board of directors and corporate governance

• Board comprises 11 nominees, 10 of whom are independent, with diverse backgrounds in leadership, public policy, health, technology, and utilities.

• Board committees include Audit, Enterprise Risk Management, Finance and Capital Investment, Nominating/Corporate Governance, and Organization and Compensation.

• Expected committee leadership changes effective May 20, 2026: Patricia K. Wagner to chair Organization and Compensation; Carol M. Pottenger to chair Enterprise Risk Management.