X0609 4 2026-06-02 0 0000766829 H2O AMERICA HTO 0001313291 Johnson A Kristen false 110 W. TAYLOR STREET SAN JOSE CA 95110 0 1 0 0 Chief Administrative Officer 0 Common Stock 14565 D Common Stck 2026-06-02 4 A 0 0 A Common Stock 139 18160 D Represents 9,040 shares of Common Stock and 5,525 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms. Represents 139 shares subject to deferred stock units ("DSUs") granted to the reporting person pursuant to dividend equivalent rights ("DERs") accrued on outstanding DSUs granted by Connecticut Water Service, Inc., a wholly owned subsidiary of the Issuer. DERs accrue when and as dividends are paid on the Common Stock underlying the awards and will vest and be settled in accordance with the same terms as the DSUs to which they relate. /s/ Willie Brown, Attorney-in-Fact for Kristen A. Johnson 2026-06-03