HTO

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 between the reporting person and the issuer dated July 1, 2025. The shares underlying such restricted stock units (RSUs) were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 2,176 shares of Common Stock and 7,800 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 Agreement between the reporting person and the issuer dated July 1, 2025. The shares underlying such restricted stock units (RSUs) were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 15,235 shares of Common Stock and 11,226 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

Represents 14,416 shares of Common Stock and 12,419 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.

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 upon the reporting person's continuation in Board service through the day immediately preceding the date of the Issuer's 2027 annual stockholders meeting, subject to accelerated vesting under certain prescribed circumstances.

Represents 2,452 shares of the issuer's Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 upon the reporting person's continuation in Board service through the day immediately preceding the date of the Issuer's 2027 annual stockholders meeting, subject to accelerated vesting under certain prescribed circumstances.

Represents 7,261 shares of Common Stock and 1,947 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 will vest in full upon the reporting person's continuation in Board service through the day immediately preceding the date of the Issuer's 2027 annual stockholders meeting, subject to accelerated vesting under certain prescribed circumstances. The reporting person has elected to defer receipt of the RSUs pursuant to the terms of the Formulaic Equity Award Program for Non-Employee Board Members implemented under the LTIP.

Represents 7,192 shares of Common Stock and 1,947 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 upon the reporting person's continuation in Board service through the day immediately preceding the date of the Issuer's 2027 annual stockholders meeting, subject to accelerated vesting under certain prescribed circumstances.

Represents 9,291 shares of Common Stock and 1,947 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 upon the reporting person's continuation in Board service through the day immediately preceding the date of the Issuer's 2027 annual stockholders meeting, subject to accelerated vesting under certain prescribed circumstances.

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 upon the reporting person's continuation in Board service through the day immediately preceding the date of the Issuer's 2027 annual stockholders meeting, subject to accelerated vesting under certain prescribed circumstances.

Represents 9,291 shares of Common Stock and 1,947 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 will vest in full upon the reporting person's continuation in Board service through the day immediately preceding the date of the Issuer's 2027 annual stockholders meeting, subject to accelerated vesting under certain prescribed circumstances. The reporting person has elected to defer receipt of the RSUs pursuant to the terms of the Formulaic Equity Award Program for Non-Employee Board Members implemented under the LTIP.

Represents 9,636 shares of Common Stock and 1,947 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 upon the reporting person's continuation in Board service through the day immediately preceding the date of the Issuer's 2027 annual stockholders meeting, subject to accelerated vesting under certain prescribed circumstances.

Represents 4,976 shares of Common Stock and 1,947 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 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.

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 on the one year anniversary of the date of grant, subject to accelerated vesting under certain prescribed circumstances.

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 reporting person through December 31, 2025 and (ii) 229 shares of Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on relative total shareholder return ("TSR") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the reporting person through December 31, 2025.

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.

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 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 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 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 (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 of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 TSR RSUs reported on this Form 4.

Represents 10,005 shares of Common Stock and 3,549 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 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 (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 of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 TSR RSUs reported on this Form 4.

Represents 7,777 shares of Common Stock and 6,788 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 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 1,947 shares of Common Stock and 8,117 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 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 (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 reporting person through December 31, 2025 and (ii) 309 shares of Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on relative total shareholder return ("TSR") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the reporting person through December 31, 2025.

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 reporting person through December 31, 2025 and (ii) 229 shares of Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on relative total shareholder return ("TSR") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the reporting person through December 31, 2025.

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 of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 TSR RSUs reported on this Form 4.

Represents 16,220 shares of Common Stock and 14,123 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

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 reporting person through December 31, 2025 and (ii) 273 shares of Common Stock subject to the 2023 RSUs that vested upon the attainment of a certain performance goal based on relative total shareholder return ("TSR") measured over a period from January 1, 2023 to December 31, 2025 and continued service by the reporting person through December 31, 2025.

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 of the applicable withholding taxes on shares of Common Stock that became issuable pursuant to the vesting of the 2023 TSR RSUs reported on this Form 4.

Represents 7,600 shares of Common Stock and 9,016 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

Represents 216 shares of the issuer's Common Stock withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on January 3, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreement between the reporting person and the issuer dated January 3, 2023. The shares underlying such RSUs were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 16,825 shares of Common Stock and 6,469 shares of the Common Stock underlying restricted stock units which will vest and become issuable in accordance with their terms.

Represents 178 shares of the issuer's Common Stock withheld in satisfaction of the applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on January 3, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreement between the reporting person and the issuer dated January 3, 2023. The shares underlying such RSUs were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 9,263 shares of Common Stock and 2,165 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

Represents 160 shares of the issuer's Common Stock withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on January 3, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreement between the reporting person and the issuer dated January 3, 2023. The shares underlying such RSUs were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 8,247 shares of the issuer's Common Stock and 4,213 shares of Common Stock underlying restricted stock units which will vest and become issuable in accordance with their terms.

Represents 152 shares of the issuer's Common Stock withheld in satisfaction of the applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on January 3, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreement between the reporting person and the issuer dated January 3, 2023. The shares underlying such RSUs were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 7,978 shares of Common Stock and 4,770 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

Represents 565 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 January 2, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreements between the reporting person and the issuer dated January 2, 2024 and January 2, 2025. The shares underlying such restricted stock units (RSUs) were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 200 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 January 2, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreement between the reporting person and the issuer dated January 2, 2025. The shares underlying such restricted stock units (RSUs) were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 1,947 shares of Common Stock and 6,410 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

Represents 514 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 January 2, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreements between the reporting person and the issuer dated January 2, 2024 and January 2, 2025. The shares underlying such restricted stock units (RSUs) were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 682 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 January 2, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreements between the reporting person and the issuer dated January 2, 2024 and January 2, 2025. The shares underlying such restricted stock units (RSUs) were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

Represents 873 shares of the issuer's common stock (Common Stock) withheld in satisfaction of the applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on January 2, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreements between the reporting person and the issuer dated December 20, 2022, January 2, 2024, and January 2, 2025, respectively. The shares underlying such restricted stock units (RSUs) were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4.

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.

Represents 1,536 shares of Issuers common stock (Common Stock) and 7,021 shares of Common Stock underlying restricted stock units which will vest and become issuable in accordance with their terms.

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 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.

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.

Represents 15,310 shares of Common Stock and 8,882 shares of the Common Stock underlying restricted stock units which will vest and become issuable in accordance with their terms.

Represents 151 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.

Represents 116 shares of the Issuer's common stock ("Common Stock") withheld in satisfaction of the applicable withholding taxes on certain shares of Common Stock that became issuable on August 22, 2025 pursuant to the terms of the August 22, 2022 Restricted Stock Unit Issuance Agreement between the reporting person and the Issuer. The issuable shares were previously reported as Table I securities at the time the restricted stock units ("RSUs") were granted, and accordingly the issuance of those shares is not a reportable transaction on this Form 4.

Represents (i) 5,548 shares of Common Stock and (ii) 8,225 shares of Common Stock underlying RSUs which will vest and become issuable in accordance with their terms.

Represents 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 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.