H2O America awards 2,166 RSUs to CAO

Mattern Megan reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Mattern Megan reported acquisition or exercise transactions in this Form 4 filing.

H2O America reported that its Chief Accounting Officer, Principal Accounting Officer and Controller, Megan Mattern, received a grant of 2,166 restricted stock units of common stock under the company’s Long-Term Incentive Plan. These RSUs vest in three annual installments over three years from the grant date, and she now holds 14,785 RSUs in total.

Insider Trade Summary

Grant/Award: 2,166 shares

Grant/Award 1 txn

Insider Mattern Megan

Role CAO, PAO and Controller

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,166	$0.00	$0.00

Holdings After Transaction: Common Stock — 14,785 shares (Direct)

Footnotes (2)

1. 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.
2. F2. Represents 14,785 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did H2O America (HTO) report for Megan Mattern?

H2O America reported that Megan Mattern received a grant of 2,166 restricted stock units of common stock. The award was issued under the company’s Long-Term Incentive Plan and represents a non-cash equity grant rather than an open-market stock purchase.

How many H2O America RSUs did Megan Mattern receive in this Form 4?

Megan Mattern received 2,166 restricted stock units of H2O America common stock. Each RSU converts into one share of common stock upon vesting, providing additional potential equity-based compensation tied to her continued service with the company.

What is the vesting schedule for Megan Mattern’s 2,166 H2O America RSUs?

The 2,166 restricted stock units will vest in three equal annual installments over three years from the grant date. Each installment requires completion of a year of service with H2O America, with potential accelerated vesting under certain prescribed circumstances outlined in the grant terms.

Did Megan Mattern pay anything for the 2,166 H2O America RSUs?

No cash was paid for the 2,166 restricted stock units, which were granted at a price per share of $0.0000. This indicates the award is a compensation grant rather than a purchase, providing potential future shares upon vesting without an upfront purchase price.

How many H2O America RSUs does Megan Mattern hold after this grant?

After this grant, Megan Mattern holds 14,785 shares of H2O America common stock underlying restricted stock units. These RSUs will vest and become issuable as shares of common stock according to their individual vesting terms set out in the related award agreements.

Is Megan Mattern’s H2O America RSU award a direct or indirect holding?

The Form 4 reports Megan Mattern’s 2,166 restricted stock units as a direct holding. The ownership code is listed as “D” for direct, indicating the RSUs are held in her name rather than through an intermediary entity or indirect ownership structure.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/03/2026 - 07:12 PM EST Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mattern Megan

(Last) (First) (Middle)

110 W. TAYLOR STREET

(Street)

SAN JOSE CA 95110

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
H2O AMERICA [ HTO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CAO, PAO and Controller

3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/27/2026		A		2,166(1)	A	$0	14,785(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

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

Remarks:

	/s/ Marisa Joss Attorney-in-Fact for Megan Mattern	03/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.