Megan Mattern - 27 Feb 2026 Form 4 Insider Report for H2O AMERICA (HTO)

Role: CAO, PAO and Controller
Signature: /s/ Marisa Joss Attorney-in-Fact for Megan Mattern
Issuer symbol: HTO
Transactions as of: 27 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 03 Mar 2026, 19:12:16 UTC
Previous filing: 31 Jul 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Mattern Megan	CAO, PAO and Controller	110 W. TAYLOR STREET, SAN JOSE	/s/ Marisa Joss Attorney-in-Fact for Megan Mattern	03 Mar 2026	0002079031

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	HTO	Common Stock	Award	$0	+2,166	+17%	$0.000000	14,785	27 Feb 2026	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents 2,166 shares of the issuer's common stock ("Common Stock") underlying restricted stock units ("RSUs") granted to the reporting person under the issuer's Long-Term Incentive Plan. Each RSU entitles the reporting person to receive one share of Common Stock upon vesting of the RSU. The RSUs will vest in three annual successive installments upon the completion of the reporting person's each year of service with the issuer for the three-year period measured from the date of grant, subject to accelerated vesting under certain prescribed circumstances.
F2	Represents 14,785 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

Content

Represents 2,166 shares of the issuer's common stock ("Common Stock") underlying restricted stock units ("RSUs") granted to the reporting person under the issuer's Long-Term Incentive Plan. Each RSU entitles the reporting person to receive one share of Common Stock upon vesting of the RSU. The RSUs will vest in three annual successive installments upon the completion of the reporting person's each year of service with the issuer for the three-year period measured from the date of grant, subject to accelerated vesting under certain prescribed circumstances.

Represents 14,785 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.