H2O AMERICA (HTO)

Data as of Aug 19, 2026, from SEC Form 4 filings.

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Latest HTO insider trades

ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner
Open-market purchase$173K
Jul 7, 2026
ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner
Open-market purchase$173K

About H2O AMERICA (HTO)

H2O America is a national investor-owned network of local water and wastewater utilities united by one purpose: delivering clean, high-quality water to the communities it calls home. Across approximately 407,000 water and wastewater service connections, the company invests in critical infrastructure to strengthen the water supply for generations to come. Its single reportable segment provides water utility and utility-related services to its customers.

Headquarters: SAN JOSE, CA
Employees: 837
Listed: 1972
Exchange: XNAS
Sector: Utilities

https://www.h2o-america.com SEC filings for HTO on EDGAR

HTO Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Tax withholding / forfeiture	1	1,154

Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.

HTO insider transactions (Form 4)

44 Form 4 filings on record, the earliest from Nov 13, 2024, newest first. Filing history page 1 of 2.

Date	Insider	Transaction	Security	Shares	Price	Value
Jul 30, 2026	Megan Mattern - Officer	Tax withholding / forfeiture	Common Stock	1,154^{footnote F1}	$61.97	$72K
Footnote F1 (shares): Represents 1,154 shares of the issuer's common stock (Common Stock) withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on July 30, 2026 pursuant to the terms of the Restricted Stock Unit Issuance… Full note on SEC EDGAR
Jul 7, 2026	ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner	Open-market purchase	Common Stock	2,784	$62.03	$173K
Jul 7, 2026	ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner	Open-market purchase	Common Stock	2,784	$62.03	$173K
Jul 1, 2026	Andrew F. Walters - Officer	Derivative	Common Stock	374^{footnote F1}	$60.74	$23K
Footnote F1 (shares): Represents 374 shares of the issuer's common stock (Common Stock) withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on July 1, 2026 pursuant to the terms of the Restricted Stock Unit Issuance… Full note on SEC EDGAR
Jul 1, 2026	Ann P. Kelly - Officer	Tax withholding / forfeiture	Common Stock	88^{footnote F1}	$60.74	$5K
Footnote F1 (shares): Represents 88 shares of the issuer's common stock (Common Stock) withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on July 1, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreement… Full note on SEC EDGAR
Jul 1, 2026	ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner	Open-market sale	Common Stock	1,686	$60.74	$102K
Jul 1, 2026	ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner	Open-market purchase	Common Stock	2,132	$60.76	$130K
Jun 5, 2026	Andrew F. Walters - Officer	Gift	Common Stock	3,508	$0.00	-
Jun 2, 2026	A. Kristen Johnson - Officer	Grant or award	Common Stck	0^{footnote F2}	-^{footnote F2}	-
Footnote F2 (price, shares): 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… Full note on SEC EDGAR
May 29, 2026	ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner	Open-market sale	Common Stock	1,435	$57.52	$83K
May 29, 2026	ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner	Open-market purchase	Common Stock	31,001	$57.62	$1.79M
May 13, 2026	Denise L. Kruger - Director	Grant or award	Common Stock	1,947^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR
May 13, 2026	Rebecca A. Klein - Director	Grant or award	Common Stock	1,947^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR
May 13, 2026	Carl Guardino - Director	Grant or award	Common Stock	1,947^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan ("LTIP"). Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs… Full note on SEC EDGAR
May 13, 2026	Hunt Heather - Director	Grant or award	Common Stock	1,947^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR
May 13, 2026	Mary Ann Hanley - Director	Grant or award	Common Stock	1,947^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan ("LTIP"). Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs… Full note on SEC EDGAR
May 13, 2026	Carol P. Wallace - Director	Grant or award	Common Stock	1,947^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR
May 13, 2026	Nick Orlando Rowe - Director	Grant or award	Common Stock	1,947^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR
May 13, 2026	Daniel B. More - Director	Grant or award	Common Stock	1,947^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR
Apr 10, 2026	GIP ATLAS Holdings Ltd - 10% Owner	Open-market purchase	Common Stock	50,385	$59.06	$2.98M
Apr 10, 2026	ATLAS Infrastructure Partners (UK) Ltd.	Open-market purchase	Common Stock	50,385	$59.06	$2.98M
Feb 27, 2026	Willie D. Brown Jr. - Officer	Grant or award	Common Stock	1,384^{footnote F1}	$0.00	-
Feb 27, 2026	Willie D. Brown Jr. - Officer	Grant or award	Common Stock	1,263^{footnote F2}	$0.00	-
Feb 27, 2026	Willie D. Brown Jr. - Officer	Tax withholding / forfeiture	Common Stock	521^{footnote F3}	$53.79	$28K
Footnote F1 (shares): Represents 1,384 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… Full note on SEC EDGAR Footnote F2 (shares): Represents (i) 1,034 shares of Issuer's Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on average return on equity ("ROE") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the… Full note on SEC EDGAR Footnote F3 (shares): Represents (i) 426 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 ROE RSUs reported on this Form 4 and (ii) 95 shares of Common Stock withheld in satisfaction… Full note on SEC EDGAR
Feb 27, 2026	Megan Mattern - Officer	Grant or award	Common Stock	2,166^{footnote F1}	$0.00	-
Footnote F1 (shares): 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… Full note on SEC EDGAR
Feb 27, 2026	A. Kristen Johnson - Officer	Grant or award	Common Stock	1,312^{footnote F1}	$0.00	-
Feb 27, 2026	A. Kristen Johnson - Officer	Grant or award	Common Stock	1,263^{footnote F2}	$0.00	-
Feb 27, 2026	A. Kristen Johnson - Officer	Tax withholding / forfeiture	Common Stock	470^{footnote F3}	$53.79	$25K
Mar 2, 2026	A. Kristen Johnson - Officer	Grant or award	Common Stck	145^{footnote F5}	-^{footnote F5}	-
Footnote F1 (shares): Represents 1,312 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… Full note on SEC EDGAR Footnote F2 (shares): Represents (i) 1,034 shares of Issuer's Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on average return on equity ("ROE") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the… Full note on SEC EDGAR Footnote F3 (shares): Represents (i) 385 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 ROE RSUs reported on this Form 4 and (ii) 85 shares of Common Stock withheld in satisfaction… Full note on SEC EDGAR Footnote F5 (price, shares): Represents 145 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… Full note on SEC EDGAR
Feb 27, 2026	Bruce A. Hauk - Officer	Grant or award	Common Stock	2,743^{footnote F1}	$0.00	-
Feb 27, 2026	Bruce A. Hauk - Officer	Grant or award	Common Stock	1,503^{footnote F2}	$0.00	-
Feb 27, 2026	Bruce A. Hauk - Officer	Tax withholding / forfeiture	Common Stock	378^{footnote F3}	$53.79	$20K
Footnote F1 (shares): Represents 2,743 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… Full note on SEC EDGAR Footnote F2 (shares): Represents (i) 1,230 shares of Issuer's Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on average return on equity ("ROE") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the… Full note on SEC EDGAR Footnote F3 (shares): Represents (i) 311 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 ROE RSUs reported on this Form 4 and (ii) 67 shares of Common Stock withheld in satisfaction… Full note on SEC EDGAR
Feb 27, 2026	Ann P. Kelly - Officer	Grant or award	Common Stock	1,707^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 1,707 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… Full note on SEC EDGAR
Feb 27, 2026	Andrew F. Walters - Officer	Tax withholding / forfeiture	Common Stock	605^{footnote F3}	$53.79	$33K
Feb 27, 2026	Andrew F. Walters - Officer	Grant or award	Common Stock	5,950^{footnote F1}	$0.00	-
Feb 27, 2026	Andrew F. Walters - Officer	Grant or award	Common Stock	1,704^{footnote F2}	$0.00	-
Footnote F1 (shares): Represents 5,950 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… Full note on SEC EDGAR Footnote F2 (shares): Represents (i) 1,395 shares of Issuer's Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on average return on equity ("ROE") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the… Full note on SEC EDGAR Footnote F3 (shares): Represents (i) 507 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 ROE RSUs reported on this Form 4 and (ii) 98 shares of Common Stock withheld in satisfaction… Full note on SEC EDGAR
Mar 1, 2026	Nick Orlando Rowe - Director	Grant or award	Common Stock	505^{footnote F1}	$0.00	-
Footnote F1 (shares): Represents 505 restricted stock units granted to the reporting person under the Issuer's 2023 Long-Term Incentive Plan. Each restricted stock unit will entitle the reporting person to receive one share of the Issuer's common stock when that unit vests. The units will vest in… Full note on SEC EDGAR
Dec 1, 2025	Ann P. Kelly - Officer	Tax withholding / forfeiture	Common Stock	581^{footnote F1}	$46.86	$27K
Footnote F1 (shares): Represents 581 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on certain shares of Common Stock that became issuable on December 1, 2025.
Dec 1, 2025	A. Kristen Johnson - Officer	Grant or award	Common Stck	159^{footnote F2}	$0.00	-
Footnote F2 (shares): Represents 159 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… Full note on SEC EDGAR
Nov 13, 2025	Andrew F. Walters - Officer	Open-market sale	Common Stock	2,100	$47.22^{footnote F1}	$99K
Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares of common stock of H2O America ("Common Stock") were sold in multiple transactions at prices ranging from $47.17 to $47.29, inclusive.

Recent HTO Form 8-K filings

Read HTO company news

Oct 1, 2026Item 2.01, 7.01, 9.01

Read the filing on SEC EDGAR

Jul 27, 2026Item 2.02, 9.01

Read the filing on SEC EDGAR

Jun 12, 2026Item 5.02, 9.01

Read the filing on SEC EDGAR

May 18, 2026Item 5.07, 9.01

HTO insider trading FAQ

What is the latest insider trade for HTO?

H2O AMERICA (HTO) had 2 insider filings in the last 90 days, with the most recent on 2026-08-19. The full record for HTO runs to 44 Form 4 filings, the earliest from 2024-11-13. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying HTO stock?

No insider purchases of HTO were filed in the last 90 days. 6 purchases are on record for this company.

How many insiders are selling HTO stock?

No insider sales of HTO were filed in the last 90 days. 3 sales are on record for this company.

Where can I see HTO SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects HTO Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Utilities companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Aug 19, 2026 - ATLAS Infrastructure Partners (UK) Ltd. view on EDGAR
Aug 3, 2026 - Megan Mattern view on EDGAR
Jul 13, 2026 - ATLAS Infrastructure Partners (UK) Ltd. view on EDGAR
Jul 8, 2026 - ATLAS Infrastructure Partners (UK) Ltd. view on EDGAR
Jul 6, 2026 - Andrew F. Walters view on EDGAR
Jul 6, 2026 - Ann P. Kelly view on EDGAR
Jul 2, 2026 - ATLAS Infrastructure Partners (UK) Ltd. view on EDGAR
Jun 6, 2026 - Andrew F. Walters view on EDGAR
Jun 3, 2026 - A. Kristen Johnson view on EDGAR

Related companies with recent insider activity

Learn more

What the Form 4 transaction codes mean: Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
Insider activity in Utilities: Where HTO's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

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Form 4 transaction type

Transactions

Total value

Tax withholding / forfeiture

1,154

Date

Insider

Transaction

Security

Price

Value

Jul 30, 2026

Megan Mattern - Officer

Tax withholding / forfeiture

Common Stock

1,154^{footnote F1}

$61.97

$72K

Footnote F1 (shares): Represents 1,154 shares of the issuer's common stock (Common Stock) withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on July 30, 2026 pursuant to the terms of the Restricted Stock Unit Issuance… Full note on SEC EDGAR

Jul 7, 2026

ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner

Open-market purchase

Common Stock

2,784

$62.03

$173K

Jul 7, 2026

ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner

Open-market purchase

Common Stock

2,784

$62.03

$173K

Jul 1, 2026

Andrew F. Walters - Officer

Derivative

Common Stock

374^{footnote F1}

$60.74

$23K

Footnote F1 (shares): Represents 374 shares of the issuer's common stock (Common Stock) withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on July 1, 2026 pursuant to the terms of the Restricted Stock Unit Issuance… Full note on SEC EDGAR

Jul 1, 2026

Ann P. Kelly - Officer

Tax withholding / forfeiture

Common Stock

88^{footnote F1}

$60.74

$5K

Footnote F1 (shares): Represents 88 shares of the issuer's common stock (Common Stock) withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on July 1, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreement… Full note on SEC EDGAR

Jul 1, 2026

ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner

Open-market sale

Common Stock

1,686

$60.74

$102K

Jul 1, 2026

ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner

Open-market purchase

Common Stock

2,132

$60.76

$130K

Jun 5, 2026

Andrew F. Walters - Officer

Gift

Common Stock

3,508

$0.00

Jun 2, 2026

A. Kristen Johnson - Officer

Grant or award

Common Stck

0^{footnote F2}

-^{footnote F2}

Footnote F2 (price, shares): 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… Full note on SEC EDGAR

May 29, 2026

ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner

Open-market sale

Common Stock

1,435

$57.52

$83K

May 29, 2026

ATLAS Infrastructure Partners (UK) Ltd. - 10% Owner

Open-market purchase

Common Stock

31,001

$57.62

$1.79M

May 13, 2026

Denise L. Kruger - Director

Grant or award

Common Stock

1,947^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR

May 13, 2026

Rebecca A. Klein - Director

Grant or award

Common Stock

1,947^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR

May 13, 2026

Carl Guardino - Director

Grant or award

Common Stock

1,947^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan ("LTIP"). Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs… Full note on SEC EDGAR

May 13, 2026

Hunt Heather - Director

Grant or award

Common Stock

1,947^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR

May 13, 2026

Mary Ann Hanley - Director

Grant or award

Common Stock

1,947^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan ("LTIP"). Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs… Full note on SEC EDGAR

May 13, 2026

Carol P. Wallace - Director

Grant or award

Common Stock

1,947^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR

May 13, 2026

Nick Orlando Rowe - Director

Grant or award

Common Stock

1,947^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR

May 13, 2026

Daniel B. More - Director

Grant or award

Common Stock

1,947^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,947 restricted stock units ("RSUs") granted to the reporting person under the Issuer's Long-Term Incentive Plan. Each RSU will entitle the reporting person to receive one share of the Issuer's common stock ("Common Stock") when that unit vests. The RSUs will vest in… Full note on SEC EDGAR

Apr 10, 2026

GIP ATLAS Holdings Ltd - 10% Owner

Open-market purchase

Common Stock

50,385

$59.06

$2.98M

Apr 10, 2026

ATLAS Infrastructure Partners (UK) Ltd.

Open-market purchase

Common Stock

50,385

$59.06

$2.98M

Feb 27, 2026

Willie D. Brown Jr. - Officer

Grant or award

Common Stock

1,384^{footnote F1}

$0.00

Feb 27, 2026

Willie D. Brown Jr. - Officer

Grant or award

Common Stock

1,263^{footnote F2}

$0.00

Feb 27, 2026

Willie D. Brown Jr. - Officer

Tax withholding / forfeiture

Common Stock

521^{footnote F3}

$53.79

$28K

Footnote F1 (shares): Represents 1,384 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… Full note on SEC EDGAR
Footnote F2 (shares): Represents (i) 1,034 shares of Issuer's Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on average return on equity ("ROE") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the… Full note on SEC EDGAR
Footnote F3 (shares): Represents (i) 426 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 ROE RSUs reported on this Form 4 and (ii) 95 shares of Common Stock withheld in satisfaction… Full note on SEC EDGAR

Feb 27, 2026

Megan Mattern - Officer

Grant or award

Common Stock

2,166^{footnote F1}

$0.00

Footnote F1 (shares): 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… Full note on SEC EDGAR

Feb 27, 2026

A. Kristen Johnson - Officer

Grant or award

Common Stock

1,312^{footnote F1}

$0.00

Feb 27, 2026

A. Kristen Johnson - Officer

Grant or award

Common Stock

1,263^{footnote F2}

$0.00

Feb 27, 2026

A. Kristen Johnson - Officer

Tax withholding / forfeiture

Common Stock

470^{footnote F3}

$53.79

$25K

Mar 2, 2026

A. Kristen Johnson - Officer

Grant or award

Common Stck

145^{footnote F5}

-^{footnote F5}

Footnote F1 (shares): Represents 1,312 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… Full note on SEC EDGAR
Footnote F2 (shares): Represents (i) 1,034 shares of Issuer's Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on average return on equity ("ROE") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the… Full note on SEC EDGAR
Footnote F3 (shares): Represents (i) 385 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 ROE RSUs reported on this Form 4 and (ii) 85 shares of Common Stock withheld in satisfaction… Full note on SEC EDGAR
Footnote F5 (price, shares): Represents 145 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… Full note on SEC EDGAR

Feb 27, 2026

Bruce A. Hauk - Officer

Grant or award

Common Stock

2,743^{footnote F1}

$0.00

Feb 27, 2026

Bruce A. Hauk - Officer

Grant or award

Common Stock

1,503^{footnote F2}

$0.00

Feb 27, 2026

Bruce A. Hauk - Officer

Tax withholding / forfeiture

Common Stock

378^{footnote F3}

$53.79

$20K

Footnote F1 (shares): Represents 2,743 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… Full note on SEC EDGAR
Footnote F2 (shares): Represents (i) 1,230 shares of Issuer's Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on average return on equity ("ROE") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the… Full note on SEC EDGAR
Footnote F3 (shares): Represents (i) 311 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 ROE RSUs reported on this Form 4 and (ii) 67 shares of Common Stock withheld in satisfaction… Full note on SEC EDGAR

Feb 27, 2026

Ann P. Kelly - Officer

Grant or award

Common Stock

1,707^{footnote F1}

$0.00

Footnote F1 (shares): Represents 1,707 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… Full note on SEC EDGAR

Feb 27, 2026

Andrew F. Walters - Officer

Tax withholding / forfeiture

Common Stock

605^{footnote F3}

$53.79

$33K

Feb 27, 2026

Andrew F. Walters - Officer

Grant or award

Common Stock

5,950^{footnote F1}

$0.00

Feb 27, 2026

Andrew F. Walters - Officer

Grant or award

Common Stock

1,704^{footnote F2}

$0.00

Footnote F1 (shares): Represents 5,950 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… Full note on SEC EDGAR
Footnote F2 (shares): Represents (i) 1,395 shares of Issuer's Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on average return on equity ("ROE") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the… Full note on SEC EDGAR
Footnote F3 (shares): Represents (i) 507 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 ROE RSUs reported on this Form 4 and (ii) 98 shares of Common Stock withheld in satisfaction… Full note on SEC EDGAR

Mar 1, 2026

Nick Orlando Rowe - Director

Grant or award

Common Stock

505^{footnote F1}

$0.00

Footnote F1 (shares): Represents 505 restricted stock units granted to the reporting person under the Issuer's 2023 Long-Term Incentive Plan. Each restricted stock unit will entitle the reporting person to receive one share of the Issuer's common stock when that unit vests. The units will vest in… Full note on SEC EDGAR

Dec 1, 2025

Ann P. Kelly - Officer

Tax withholding / forfeiture

Common Stock

581^{footnote F1}

$46.86

$27K

Footnote F1 (shares): Represents 581 shares of Common Stock withheld in satisfaction of the applicable withholding taxes on certain shares of Common Stock that became issuable on December 1, 2025.

Dec 1, 2025

A. Kristen Johnson - Officer

Grant or award

Common Stck

159^{footnote F2}

$0.00

Footnote F2 (shares): Represents 159 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… Full note on SEC EDGAR

Nov 13, 2025

Andrew F. Walters - Officer

Open-market sale

Common Stock

2,100

$47.22^{footnote F1}

$99K

Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares of common stock of H2O America ("Common Stock") were sold in multiple transactions at prices ranging from $47.17 to $47.29, inclusive.