144 0001598003 XXXXXXXX LIVE 0000766829 H2O America 001-08966 110 West Taylor Street San Jose CA 95110 408-279-7800 Andrew F. Walters CEO, Director Common Stock J.P. Morgan Securities LLC

270 Park Avenue, 10th Floor New York NY 10017

2100 98721 35805089 11/13/2025 NASDAQ Common Stock 01/03/2022 Compensation Issuer N 601 01/03/2022 Compensation Common Stock 01/04/2022 Compensation Issuer N 317 01/04/2022 Compensation Common Stock 01/02/2020 Compensation Issuer N 523 01/02/2020 Compensation Common Stock 01/03/2020 Compensation Issuer N 210 01/03/2020 Compensation Common Stock 01/04/2021 Compensation Issuer N 449 01/04/2021 Compensation Y 11/13/2025 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Andrew F. Walters