Skip to content
KStart free
AI InfrastructureDefenseQuantumAll studies →

HTO US Equity

H2O AmericaUtilities · Water Supply · CIK 766829 · FY ends Dec 31
$63.48
-0.77 (-1.20%)
USD · as of 2026-08-21 · marketstack

HTO · 10-K · period ended 2025-12-31

← all HTO documents
filed 2026-02-26 · EDGAR original ↗

Our rendering of the filing — original pagination and typography are not reproduced, and tables are reduced to their short label cells (the figures live on FA). Nothing is summarized: every line below is the filing's own text.

blocks 1482 of 1,544343k characters rendered

hto-20251231

Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K

For the fiscal year ended December 31, 2025

OR

For the transition period from to

Commission file number: 001-8966

H2O AMERICA

(Exact name of registrant as specified in its charter)

110 West Taylor Street, San Jose, CA 95110

(Address of principal executive offices) (Zip Code)

(408)279-7800

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, par value $0.001 per share HTO Nasdaq Global Select Market

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐No☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company,” in Rule 12b-2 of the Exchange Act.

Large accelerated filer☒ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the Registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b) ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of June 30, 2025, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was approximately $1.8 billion based on the closing sale price as reported on the Nasdaq Global Select Market.

As of February 19, 2026, 36,164,486 shares of the registrant’s common stock, par value, $0.001 per share, were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s Proxy Statement relating to the registrant’s Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K where indicated.

Table of Contents

TABLE OF CONTENTS

Page

PART I

Forward-Looking Statements 3

Item 1. Business 4

Item 1A. Risk Factors 16

Item 1B. Unresolved Staff Comments 30

Item 1C. Cybersecurity 30

Item 2. Properties 31

Item 3. Legal Proceedings 31

Item 4. Mine Safety Disclosures 32

PART II

Item 6. [Reserved] 33

Item 7A. Quantitative and Qualitative Disclosures About Market Risk 51

Item 8. Financial Statements and Supplementary Data 52

Item 9A. Controls and Procedures 94

Item 9B. Other Information 95

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspection 95

PART III

Item 10. Directors, Executive Officers and Corporate Governance 95

Item 11. Executive Compensation 96

Item 14. Principal Accountant Fees and Services 96

PART IV

Item 15. Exhibits and Financial Statement Schedules 97

Exhibit Index 98

Table of Contents

PART I

Forward-Looking Statements

This report contains forward-looking statements within the meaning of the federal securities laws relating to future events and future results of H2O America and its subsidiaries that are based on current expectations, estimates, forecasts, and projections about H2O America and its subsidiaries and the industries in which H2O America and its subsidiaries operate and the beliefs and assumptions of the management of H2O America. Some of these forward-looking statements can be identified by the use of forward-looking words such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” “estimates,” “projects,” “strategy,” or “anticipates,” or the negative of those words or other comparable terminology. These forward-looking statements are only predictions and are subject to risks, uncertainties and assumptions that are difficult to predict. Therefore, actual results may differ materially and adversely from those expressed in any forward-looking statements. Important factors that could cause or contribute to such differences include, but are not limited to, those discussed in this report under Item 1A, “Risk Factors,” and Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and elsewhere, and in other reports and documents H2O America files with the Securities and Exchange Commission (the “SEC”), specifically the most recent Form 10-Q and reports on Form 8-K filed with the SEC, each as it may be amended from time to time.

The accuracy of such statements is subject to a number of risks, uncertainties and assumptions including, but not limited to, the following factors:

•the risks associated with the proposed transactions with Quadvest, L.P., a Texas limited partnership, and Quadvest Wholesale, LLC, a Texas limited liability company (together “Quadvest”), including, the risk of the proposed transactions not closing on the anticipated timeline, or at all, the ability to obtain required regulatory approvals, and the ability to successfully integrate Quadvest’s operations and realize the projected financial and other benefits of the proposed transactions;

•the effect of water, utility, environmental and other governmental policies and regulations, including regulatory actions concerning rates, authorized return on equity, authorized capital structures, capital expenditures, per- and polyfluoroalkyl substances (“PFAS”) and other decisions;

•changes in demand for water and other services;

•unanticipated weather conditions and changes in seasonality including those affecting water supply and customer usage;

•the effect of the impacts of climate change;

•unexpected costs, charges or expenses;

•our ability to successfully evaluate investments in new business and growth initiatives;

•contamination of our water supplies and damage or failure of our water equipment and infrastructure;

•the risk of work stoppages, strikes and other labor-related actions;

•catastrophic events such as fires, earthquakes, explosions, floods, ice storms, tornadoes, hurricanes, terrorist acts, physical attacks, cyber-attacks, epidemic or similar occurrences;

•changes in general economic, political, business and financial market conditions;

•the ability to obtain financing on favorable terms, which can be affected by various factors, including credit ratings, changes in interest rates, compliance with regulatory requirements, compliance with the terms and conditions of our outstanding indebtedness, and general market and economic conditions; and

•legislative and general market and economic developments.

Actual results are subject to other risks and uncertainties that relate more broadly to our overall business, including those more fully described in our filings with the SEC, including our most recent reports on Form 10-K, Form 10-Q and Form 8-K. Forward-looking statements are not guarantees of performance, and speak only as of the date made, and H2O America undertakes no obligation to update or revise any forward-looking statements except as required by law.

3

Table of Contents

Item 1.Business

General Development of Business

H2O America, a Delaware corporation, was initially incorporated as SJW Corp. in the state of California in 1985. In May 2025, the company changed its corporate name from SJW Group to H2O America. We will not distinguish between our prior and current corporate name and will refer to our current corporate name throughout this Annual Report on Form 10-K. As such, unless expressly indicated or the context requires otherwise, the terms “H2O America,” “company,” “we,” “us,” and “our” in this document refer to H2O America, a Delaware corporation, and, where appropriate, its subsidiaries. H2O America is a holding company that conducts its business through the following wholly owned subsidiaries:

•San Jose Water Company (“SJWC”), with its headquarters located at 110 West Taylor Street in San Jose, California 95110, was originally incorporated under the laws of the State of California in 1866. As part of a reorganization in 1985, SJWC became a wholly owned subsidiary of H2O America. SJWC is a public utility in the business of providing water service in the metropolitan San Jose, California area.

•H2O America NE LLC (previously known as SJWNE LLC), a Delaware limited liability company, was formed in 2019, and is a wholly owned subsidiary of H2O America. H2O America NE LLC is a special purpose entity established to hold H2O America’s investment in Connecticut Water Service, Inc. Connecticut Water Service, Inc. with its headquarters located in Clinton, Connecticut, was incorporated in 1974 in the State of Connecticut. As part of the merger transaction between H2O America and Connecticut Water Service, Inc. in 2019, Connecticut Water Service, Inc. and its subsidiaries (“CTWS”) became a wholly owned subsidiary of H2O America NE LLC. Connecticut Water Service, Inc. is a holding company with four wholly owned subsidiaries. The Connecticut Water Company (“CWC”) and The Maine Water Company (“MWC”) are public utilities in the business of providing water service throughout Connecticut and Maine. The remaining two subsidiaries are Chester Realty, Inc., a real estate company in Connecticut, and New England Water Utility Services, Inc. (“NEWUS”), which provides contract water and sewer operations and other water-related services.

•H2O America TX Holdings, Inc. (previously known as SJWTX Holdings, Inc.), a Texas corporation, formed in 2021, is the holding company for SJWTX, Inc., doing business as The Texas Water Company (“TWC”), Texas Water Operation Services, LLC (“TWOS”) and Texas Water Resources, LLC (“TWR”). TWC is a public utility in the business of providing water service in Bandera, Blanco, Comal, Hays, Kendall, Medina and Travis Counties in the growing region between San Antonio and Austin, Texas. TWC additionally provides wastewater service in Comal and Kendall counties. TWC also holds a 25% equity interest in Acequia Water Supply Corporation (“Acequia”). Acequia has been determined to be a variable interest entity within the scope of Accounting Standards Codification (“ASC”) Topic 810—“Consolidation,” with TWC as the primary beneficiary. As a result, Acequia has been consolidated with TWC. TWOS was created for non-tariffed service operations and TWR was formed to hold wholesale water supply assets.

•H2O America Land Company (previously known as SJW Land Company) was incorporated in 1985. H2O America Land Company owns undeveloped land in California.

•National Water Utility Services, LLC (“NWU”) is currently the contracting entity for shared services among the H2O America affiliates formed in 2024.

•H2O America Risk Solutions, Inc., is a captive insurance entity and wholly owned subsidiary of H2O America Inc., established in 2025 to manage certain insurance specific risks of the Company in addition to its use of traditional insurance products provided by its current insurance carriers.

Together, SJWC, excluding the City of Cupertino (“Cupertino”) service concession arrangement operations, CWC, MWC, TWC, and Acequia, are referred to as “Water Utility Services,” which is our single reportable segment.

Other business activities that are not separately reportable segments are SJWC’s City of Cupertino service concession arrangement operations, property management and investment activity conducted by H2O America Land Company and Chester Realty, Inc., contract water and sewer operations and other water-related services provided by NEWUS and are collectively referred to as “Other Services.”

Quadvest acquisition

On July 7, 2025, H2O America, through its indirect subsidiary, TWC, entered into an Asset Purchase Agreement (the “Regulated Business APA”), with Quadvest, L.P., a Texas limited partnership, as seller (“Quadvest Retail”) and H2O America, as guarantor, pursuant to which, and subject to the terms and conditions set forth therein, Quadvest Retail has agreed to sell, and

4

Table of Contents

TWC has agreed to acquire, substantially all of the assets of Quadvest Retail related to the operation of Quadvest Retail’s water and sewer utility business (the “Regulated Business”) at a purchase price consisting of a base amount of $483.6 million, with certain adjustments based on capital expenditures (the “Regulated Business Transaction”). The Regulated Business Transaction will be subject to the satisfaction of various closing conditions set forth in the Regulated Business APA, including satisfaction of the closing conditions with respect to the Wholesale Business Transaction described below.

Concurrently on July 7, 2025, H2O America, its indirect subsidiary, Texas Water Operation Services, LLC (“TWOS”) and TWC (together with H2O America and TWOS, the “Purchasers”), entered into another Asset Purchase Agreement (the “Wholesale Business APA” and together with the Regulated Business APA, the “Agreements”), with Quadvest Retail and its affiliate, Quadvest Wholesale, LLC, a Texas limited liability company (“Quadvest Wholesale” and together with Quadvest Retail, the “Sellers”), pursuant to which, and subject to the terms and conditions set forth therein, Quadvest Wholesale has agreed to sell, and TWOS has agreed to acquire substantially all of the assets of Quadvest Wholesale related to the operation of Quadvest Wholesale’s wholesale water and sewer business (the “Wholesale Business” and together with the Regulated Business, the “Businesses”) at a purchase price consisting of a base amount of $56.4 million, with certain adjustments based on capital expenditures (the “Wholesale Business Transaction”, and together with the Regulated Business Transaction, the “Transactions”). The Wholesale Business Transaction will be subject to the satisfaction of various closing conditions set forth in the Wholesale Business APA, including the simultaneous closing of the Regulated Business Transaction described above.

On July 9, 2025, TWC filed a request with the Public Utility Commission of Texas (“PUCT”) to use Fair Market Value (“FMV”) to support its acquisition of Quadvest, L.P. On August 7, 2025, the PUCT appointed three appraisers to determine the FMV. In December 2025, TWC received the appraised FMV from the three PUCT appointed appraisers for the assets of Quadvest, L.P. In accordance with Texas’ FMV statute, the purchase price of $483.6 million will serve as the ratemaking rate base. TWC filed its Sale, Transfer & Merger (“STM”) application with the PUCT in January 2026.

Regulation and Rates

Water Utility Services, excluding non-tariffed activities, are subject to rate regulation based on cost recovery and meets the criteria of accounting guidance for rate-regulated operations, which affects the timing of the recognition of certain revenues and expenses. H2O America’s consolidated financial statements reflect the actions of regulators in the ratemaking process. The ratemaking process is intended to provide revenues sufficient to recover normal operating expenses, provide funds for replacement of water infrastructure and produce a fair and reasonable return on stockholder common equity. H2O America’s regulated operations financing activities are designed to achieve capital structures consistent with regulatory guidelines in the locations where the companies operate. The following summarizes each state’s authorized rates and capital structure as of December 31, 2025:

California Connecticut Texas (a) Maine (b)

___________________________________

(a)Estimated by management.

(b)The authorized capital structure and return on equity shown are those of the largest division of MWC, the Biddeford and Saco division. This return on equity and capital structure will be used for any future Water Infrastructure Surcharge (“WISC”) calculations for all divisions until the Maine Public Utilities Commission (“MPUC”) has authorized or approved a different return on equity structure in a different proceeding.

(c)For California, the approved Water Cost of Capital Mechanism (“WCCM”)-adjusted return on equity is 10.01% less a 20-basis point reduction due to the reimplementation of the Water Conservation Memorandum Account (“WCMA”).

(d)An approximation of rate base which includes net utility plant not yet included in rate base pending rate case filings and outcomes.

California Regulatory Affairs

SJWC’s rates, service and other matters affecting its business are subject to regulation by the California Public Utilities Commission (the “CPUC”).

Generally, there are three types of rate adjustments that affect SJWC’s revenue collection: general rate adjustments, cost of capital adjustments, and offset rate adjustments. From time to time, SJWC may file special rate applications for discrete projects, such as the Montevina Water Treatment Plant Upgrade and the Advanced Metering Infrastructure program as needed or directed by the CPUC. These special applications are separate from general rate case filings and are subject to their own rate recovery mechanisms. General rate adjustments are authorized in general rate case decisions, which usually authorize an initial

5

Table of Contents

rate adjustment followed by two annual escalation adjustments. General rate applications are normally filed and processed during the last year covered by the most recent general rate case as required by the CPUC in order to avoid any gaps in regulatory decisions on general rate adjustments. Actual revenue received may be higher or lower than the revenue requirement due to a number of factors including actual customer counts, usage or other regulatory factors in force at the time.

Cost of capital adjustments are rate adjustments resulting from the CPUC’s usual tri-annual establishment of a reasonable rate of return for SJWC’s capital investments.

The purpose of an offset rate adjustment is to compensate utilities for changes in specific pre-authorized offsettable capital investments or expenses, primarily for purchased water, groundwater extraction, purchased power, pensions, and group health insurance. Pursuant to the California Public Utilities Code, a balancing account must be maintained for each expense item for which such revenue offsets have been authorized. Memorandum accounts track revenue impacts due to catastrophic events, certain unforeseen water quality expenses related to new federal and state water quality standards, energy efficiency, water conservation during periods of mandated water restrictions, water tariffs and other approved activities or as directed by the CPUC. The purpose of balancing and memorandum accounts is to track the under-collection or over-collection associated with such expense changes and activities for future recovery or refund considerations. Carrying balances of the balancing and memo accounts earn a rate of return based on treasury rates.

On June 29, 2023, the CPUC approved an authorized rate of return of 7.28% based on a return on equity of 8.80%, cost of debt of 5.46%, and a capital structure of approximately 45% debt and 55% equity. The CPUC also authorized continuation of the WCCM in the same decision. The WCCM provided for an adjustment to SJWC’s return on equity and cost of debt if the average Moody’s Aa utility bond index rate between October 1, 2021 and September 30, 2022 varies by more than 100 basis points when compared to the same period from the prior year. The index rate difference between those periods increased 103 basis points, thereby triggering the WCCM. Accordingly, on June 30, 2023, SJWC filed Advice Letter No. 598 to inform the CPUC that the authorized rate of return required an update in accordance with the WCCM. On July 31, 2023, SJWC filed Advice Letter 599 to adjust the return on equity to 9.31% and the cost of debt to 5.26%, resulting in a rate of return of 7.47% for the remainder of 2023. Advice Letter No. 599 was approved with an effective date of July 31, 2023. On October 13, 2023, SJWC filed Advice Letter No. 601 to inform the CPUC that the authorized WCCM required an update to SJWC’s authorized rate of return, effective January 1, 2024, based on the change to the Moody’s Aa utility bond index rate between October 1, 2022, and September 30, 2023. SJWC requested an adjusted return on equity of 10.01%, a cost of debt of 5.28%, and a resulting authorized rate of return of 7.86%. The request was approved with an effective date of January 1, 2024, Separate from the filing, the return on equity was further adjusted by a 20-basis point reduction for reimplementation of the WCMA resulting in an overall rate of return of 7.75%.

On December 15, 2023, SJWC, along with three other California water utilities, filed a joint request for a one-year deferment on the cost of capital filings which would otherwise be due on May 1, 2024. Postponing the filing a year alleviated administrative processing costs on the utilities as well as the CPUC staff and provided relief for both CPUC and utility resources already strained by numerous other proceedings. The request was conditioned on leaving the current WCCM in place such that any adjustments would be made to the respective utilities cost of capital during the one-year deferment based on the mechanism. The request was approved on February 2, 2024. Based on the change in the average Moody’s Aa utility bond index rate between the 12 months ended September 30, 2023 and September 30, 2024, there was no adjustment to SJWC’s cost of capital for 2025.

On January 2, 2024, SJWC filed a general rate case application with the CPUC to increase rates charged for water service by $55.2 million or 11.11% in 2025, by $22 million or 3.99% in 2026, and by $25.8 million or 4.49% in 2027. The application proposed a $540 million three-year capital budget and also included requests to recover $23.5 million from balancing and memorandum accounts, further alignment between actual and authorized usage, and a shift to greater revenue collection in the service charge. On December 19, 2024, the CPUC approved a final decision for rate increases of $21.3 million or 3.91% in 2025, $14.4 million or 2.55% in 2026, and $17.4 million or 2.98% in 2027. The decision also provides a three-year capital budget of $450 million and recovery of $15.8 million in memorandum and balancing accounts.

On May 16, 2024, SJWC filed Advice Letter No. 609 to increase the authorized revenue requirement by $28.3 million, or 5.3%, to offset the increases to purchased potable water charges, the groundwater extraction fee, and purchased recycled water charges from its water wholesalers effective July 1, 2024. Advice Letter No. 609 was approved with an effective date of July 1, 2024.

On May 23, 2024, SJWC filed Advice Letter No. 610/610A to increase the authorized revenue requirement by $0.8 million, or 0.14%, to recover revenue related to the plant additions for the Advanced Metering Infrastructure project. Advice Letter No. 610/610A was approved with an effective date of July 1, 2024.

On December 9, 2024, SJWC filed Application No. 24-12-004 with the CPUC requesting authorization to issue and sell additional debt securities in an aggregate principle amount not exceeding $400 million to fund the retirement of all or a portion of SJWC’s then-outstanding short-term bank loans, and the balance, if any, for any or all purposes as may be allowed under

6

Table of Contents

Section 817 of the Public Utilities Code, including water utility plant construction, completion, replacement, extension or improvements of its existing facilities; acquisition of property and/or water systems; and reimbursement of moneys previously expended from income for which SJWC’s treasury has not been reimbursed. This application is pending before the CPUC.

On December 18, 2024, SJWC, along with three other California water utilities, filed a joint request for a second one-year deferment on the cost of capital filings which would otherwise be due on May 1, 2025. The request was conditioned on leaving the current WCCM in place such that any adjustments will be made to the respective utilities cost of capital during the one-year deferment based on the mechanism. The request was approved on January 14, 2025.

On December 20, 2024, SJWC filed Advice Letter No. 613 to increase authorized revenue requirement by $21.3 million, or 3.91%, and implement new water rates and recover $15.8 million in memorandum and balancing accounts in accordance with Decision No. 24-12-077. This filing was approved with an effective date of January 1, 2025.

On May 27, 2025, SJWC filed Advice Letter No. 616 to increase the authorized revenue requirement by $22.5 million, or 4.00%, to offset the increases to purchased potable water charges, the groundwater extraction fee, and purchased recycled water charges from its water wholesalers effective July 1, 2025. Advice Letter No. 616 was approved with an effective date of July 1, 2025.

On May 28, 2025, SJWC filed Advice Letter No. 617 to increase the authorized revenue requirement by $6.8 million, or 1.16%, to recover revenue related to the plant additions for the Advanced Metering Infrastructure (“AMI”) project. Advice Letter No. 617 was approved with an effective date of July 1, 2025.

On June 24, 2025, SJWC filed Advice Letter No. 618 to establish the Water Contamination Litigation Memorandum Account (“WCLMA”) to track net proceeds and costs resulting from water contamination litigation. Advice Letter No. 618 was approved in July 2025 by the CPUC with an effective date of June 24, 2025.

On October 15, 2025, SJWC filed Advice Letter No. 620 to re-establish the Ground Water Regulation Legal Expense Memorandum Account to track litigation and consensus building legal and related legal expenses associated with SJWC’s water rights. Advice Letter No. 620 was approved with an effective date of November 14, 2025.

On November 10, 2025, SJWC, along with three other California water utilities, filed a joint request for a third one-year deferment on the cost of capital filings which would otherwise be due on May 1, 2026. The request was conditioned on leaving the current WCCM in place such that any adjustments will be made to the respective utilities cost of capital during the one-year deferment based on the mechanism. The request was approved on November 18, 2025.

On November 20, 2025, SJWC filed Advice Letter No. 621 to increase the authorized revenue requirement by $17.2 million, or 2.89%. This filing was superseded by Advice Letter No. 621A, filed on December 5, 2025, to update changes to certain rate schedules. Advice Letter No. 621A was approved with an effective date of January 1, 2026.

Connecticut Regulatory Affairs

CWC’s rates, service and other matters affecting its business are subject to regulation by the Public Utilities Regulatory Authority of Connecticut (“PURA”).

PURA allows the Connecticut regulated operations to add surcharges to customers’ bills in order to recover certain costs associated with approved eligible capital projects through the Water Infrastructure Conservation Adjustment (“WICA”) in between full rate cases, as well as approved surcharges or sur-credits for the Water Revenue Adjustment (“WRA”).

On February 26, 2024, CWC filed its 2023 WICA reconciliation with PURA. The reconciliation, approved by PURA on March 27, 2024 and effective for 12 months beginning April 1, 2024, replaced the expiring 2022 reconciliation credit of 0.16% with a credit of 0.13%. The cumulative WICA surcharge as of April 1, 2024 was 7.41%, collecting $7.8 million on an annual basis. In connection with CWC’s most recent general rate case decision, as of July 1, 2024, the base WICA surcharge was reset to zero; however, the credit of 0.13% for 2023 reconciliation continued to apply into 2025.

On February 28, 2024, CWC filed its 2023 WRA. The mechanism reconciles 2023 revenues as authorized in CWC’s most recent rate case. The 2023 WRA, as approved by PURA on March 11, 2024 and effective for 12 months beginning on April 1, 2024, imposed a 2.11% sur-credit on customer bills to refund the 2023 revenues over-collection.

On June 21, 2024, CWC submitted an application to PURA for the approval to issue unsecured notes in an amount of up to $150.0 million. PURA approved the application on August 14, 2024.

On July 26, 2024, CWC filed for a WICA increase of $4.3 million in annualized revenue for $41.9 million in completed infrastructure projects. PURA approved the application, and effective October 1, 2024, the cumulative WICA surcharge is 3.43%.

On January 28, 2025, CWC filed its 2024 WICA reconciliation with PURA. The reconciliation is effective for 12 months beginning April 1, 2025, replacing the expiring 2023 reconciliation credit of $0.1 million with a credit of $2.4 million on an

7

Table of Contents

annual basis. On January 28, 2025, CWC filed for a WICA increase of $1.6 million in annualized revenues for $15.7 million in completed projects. On March 26, 2025, PURA approved the filing in its entirety. The cumulative WICA surcharge as of April 1, 2025, was 4.90%, collecting $6.0 million on an annual basis.

On February 24, 2025, CWC filed its 2024 Water Rate Adjustment (“WRA”) mechanism. The mechanism reconciles 2024 revenues as authorized in the CWC’s most recent rate case as well as provides for recovery of certain amounts of executive compensation as the result of the achievement of performance metrics as prescribed by PURA. The 2024 WRA surcharge of 3.62%, approved by PURA on March 26, 2025, is effective for 12 months beginning April 1, 2025.

On March 6, 2025, CWC submitted an application requesting that PURA approve the issuance of $19.4 million in Drinking Water State Revolving Fund Loans that the Company proposes to use to fund three projects pertaining to: (1) the interconnection of the Green Springs Water System in Madison, Connecticut with the Guilford Water System; (2) a facility for centralized treatment of raw water from certain wells in CWC’s Gallup System in Plainfield, Connecticut; and (3) a Lead Service Line Identification Program. A decision was received from PURA on April 30, 2025, approving CWC’s request.

On June 4, 2025, the Connecticut General Assembly approved Public Act No. 25-142, An Act Concerning Water Utility Systems and Water Quality and Treatment Surcharges. The Act, signed by the Governor on July 1, 2025, allows CWC to surcharge customers for investments related to emerging contaminants, primarily PFAS. In accordance with the legislation, CWC submitted its Water Quality and Treatment Adjustment (“WQTA”) Assessment Report (“AR”) on July 2, 2025. A decision was received from PURA on December 17, 2025, approving CWC’s AR.

On July 30, 2025, CWC filed for a WICA increase of $3.1 million in annualized revenue for $24.3 million in completed projects. On September 24, 2025, PURA approved the filing in its entirety. The cumulative WICA surcharge as of October 1, 2025 is 7.47%, collecting $9.1 million on an annual basis.

On January 22, 2026, CWC submitted its WQTA application to recover the costs associated with in-progress or completed WQTA-eligible projects through a WQTA surcharge of $0.6 million, or 0.53%. Also included in this filing was a revised WQTA AR reflecting a comprehensive view of the status of all projects featuring updated project eligibilities, costs and water quality sampling results. If approved by PURA, the proposed WQTA charge will become effective April 1, 2026.

On January 26, 2026, CWC filed its 2025 WICA reconciliation with PURA for a surcharge of $0.3 million on an annual basis. The reconciliation, if approved, would be effective for 12 months beginning April 1, 2026. In addition, on January 26, 2026, CWC filed for a WICA increase of $2.7 million in annualized revenues for $25.7 million in completed projects. If approved, the cumulative WICA surcharge as of April 1, 2026, will be 9.90%, collecting $12.1 million on an annual basis.

On February 25, 2026, CWC filed its 2025 WRA mechanism. The mechanism reconciles 2025 revenues as authorized in the CWC’s most recent rate case as well as provides for recovery of certain amounts of executive compensation as the result of the achievement of performance metrics as prescribed by PURA. If approved, the 2026 WRA surcharges of 5.70% will become effective for 12 months beginning April 1, 2026.

Texas Regulatory Affairs

TWC’s rates are subject to the economic regulation of the PUCT. The PUCT may authorize rate increases after the filing of an Application for a Rate/Tariff Change. Rate cases may be filed as they become necessary, provided there is no current rate case outstanding. Furthermore, rate cases may not be filed more frequently than once every 12 months.

TWC has no current general rate case pending. However, TWC continues to amend its existing System Improvement Charge (SIC) for both water and sewer. SIC filings are used to include certain utility plant additions made from 2020 to present in its rate base, thereby increasing revenue and avoiding the immediate need for a general rate case. On September 12, 2024, TWC filed its application to amend its original SIC with the PUCT. Its amended SIC applies to all customers and increases its annual water revenue by $3.9 million and its annual sewer revenue by $0.2 million, in addition to the original SIC filed with the PUCT on December 30, 2022. On May 15, 2025, the PUCT filed the final order approving TWC’s amended SIC application. On October 6, 2025, TWC filed its second application to amend its SIC. The application seeks to increase TWC annual water revenue by $4.7 million and sewer revenue by $0.3 million, in addition to its amended approved SIC rates. TWC’s second application to amend its SIC was deemed administratively complete on December 15, 2025, and is expected to be approved mid-2026. Additionally, TWC is required to file a general rate case on or before March 21, 2028. Notwithstanding any SIC filing, TWC will continue to file its annual adjustments for the Water Pass-through Charges (“WPC”) for Canyon Lake, Deer Creek, Kendall West, Clear Water Estates, and Saddleridge customers. All water supply cost increases are recoverable when the next annual WPC adjustment for each system is filed.

Maine Regulatory Affairs

MWC’s rates, service and other matters affecting its business are subject to regulation by the MPUC. MPUC allows MWC to add surcharges to customers’ bills in order to recover certain costs associated with capital projects through the WISC in

8

Table of Contents

between general rate cases. Projects eligible for WISC surcharges include all infrastructure replacement or repair projects, excluding meters, that are necessary for the transmission, distribution or treatment of water.

On March 31, 2023, MWC filed the third and final step of its multi-year rate case for the Biddeford Saco division related to the Saco Drinking Water Resource Center. The filing sought a $2.9 million, or 19.9%, increase in revenue requirement, proposed to be phased in over two years with a 12% increase effective July 1, 2023 followed by a 9% increase effective July 1, 2024, with a slight decrease in year three to reach the overall 19.9% requested. On August 5, 2023 the MPUC issued an order granting a temporary rate increase of $1.5 million or 10% while the case and the company’s full request were litigated. The company reached a settlement agreement with MPUC and the Office of the Public Advocate and filed a stipulated settlement agreement with the MPUC on December 22, 2023. The commission approved the stipulation on January 5, 2024, with a rate effective date of January 1, 2024. The approved stipulation authorized an increase in rates of $2.6 million or 17.6%. The Biddeford and Saco division’s increase in rates was based on an authorized return on equity of 9.5% along with a capital structure of 49% debt and 51% equity. This return on equity and capital structure are used for any future WISC calculations for all divisions until the MPUC has authorized or approved a different return on equity structure in a different proceeding.

During the year ended December 31, 2024, MPUC issued orders approving surcharges for the Camden-Rockland, Freeport, Oakland and Millinocket divisions that in aggregate represent annual revenue increases of $0.3 million.

On October 25, 2024, MWC filed an application with MPUC to adjust customer rates in the Camden Rockland division. The proposal requested an increase in annual revenues of approximately $1.1 million, or 15.9%, over then-current authorized revenues. On June 27, 2025, the MPUC approved a settlement stipulation, authorizing an increase in rate of $0.87 million, or 13.0% with an effective date of July 1, 2025.

On December 31, 2024, MWC filed a request to establish a unified tariff across its ten separate rate divisions. On January 13, 2026, the MPUC approved a stipulated agreement consolidating those ten districts into a single unified rate structure, effective February 1, 2026. The agreement also includes authorization for a needs-based financial assistance program consistent with Legislative Document 241, An Act to Authorize the Public Utilities Commission to Approve Rate Adjustments for Low-Income Water Utility Ratepayers, approved by the Maine Legislature and signed into law by the Governor on May 29, 2025.

On April 15, 2025, MWC filed a WISC in both the Oakland and Biddeford Saco divisions. The combined requested surcharge is 3.00% or $0.5 million. The MPUC issued an order approving the surcharges on June 24, 2025, with an effective date of July 1, 2025.

On January 30, 2026, MWC issued a Notice of Intent to file a general rate case with the MPUC on or about March 31,2026. The filing will be the first general rate case since the MPUC’s approval of MWC’s unified rate schedule. MWC’s proposed revenue requirement will be based on a test year ending December 31, 2025, and adjusted for known and measurable changes and other ratemaking considerations. MWC expects to propose an annual revenue increase of approximately $12 million.

Please also see Item 1A, “Risk Factors,” Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and Note 3 of “Notes to Consolidated Financial Statements.”

Description of Business

General

The principal business of H2O America consists of the production, purchase, storage, purification, distribution, wholesale and retail sale of water and wastewater services. SJWC provides water services to approximately 232,000 connections that serve approximately one million people over 140 square miles residing in portions of the cities of San Jose and Cupertino and in the cities of Campbell, Monte Sereno, Saratoga and in the Town of Los Gatos, and adjacent unincorporated territories, all in the County of Santa Clara in the State of California. The CTWS companies provide water service to approximately 143,000 service connections that serve a population of approximately 465,000 people in 81 municipalities with a service area of approximately 275 square miles throughout Connecticut and Maine and approximately 3,000 wastewater connections in Southbury, Connecticut. TWC provides water service to approximately 30,000 service connections that serve approximately 90,000 people in a service area comprising more than 271 square miles in the region between San Antonio and Austin, Texas and approximately 1,000 wastewater connections. Together, the Water Utility Services distribute water to customers in their respective service areas in accordance with accepted water utility methods. Water Utility Services also provide non-tariffed services under agreements with municipalities and other utilities. These non-tariffed services include water system operations, maintenance agreements and antenna site leases.

SJWC operates the Cupertino municipal water system under a service concession arrangement. The system is adjacent to the SJWC service area and has approximately 4,700 service connections. The original agreement commenced in October 1997 and expired on September 30, 2024. Effective October 2024, SJWC entered into a 12-year agreement with Cupertino subject to an additional term of eight years if agreed to by the parties. SJWC paid an upfront concession fee of $22.1 million in 2024 and agreed to pay, beginning in 2024, an annual investment rent of $1.8 million, subject to adjustment each year based on a

9

Table of Contents

specified construction cost index. Under the terms of the agreement, SJWC assumes responsibility for all maintenance and operating costs of the system, while receiving all payments for water service.

CTWS provides contracted services to water utilities, as well as offers Linebacker® protection plans for public drinking water customers in the states of Connecticut and Maine. Linebacker plans cover a limited amount of the cost of repairs to water and wastewater service lines and in-home plumbing. Services provided are dependent on the selected plan.

H2O America Land Company owns undeveloped real estate property in California. H2O America Land Company previously owned commercial and warehouse properties in Tennessee, which were sold in 2024. Chester Realty, Inc. owns commercial properties and parcels of land in Connecticut.

Among other things, operating results from the water business fluctuate according to the demand for water, which is often influenced by seasonal conditions, such as impact of drought, summer temperatures or the amount and timing of precipitation in Water Utility Services’ service areas. Revenue, production expenses and income are affected by changes in water sales and the sources of water supply. Overhead costs, such as payroll and benefits, depreciation, interest on long-term debt, and property taxes are not significantly impacted by seasonality or water supply mix. Generally, earnings are highest in the higher demand, warm summer months and lowest in the lower demand, cool winter months. Certain regulatory mechanisms in our service areas may mitigate the effects of demand fluctuations and/or variations in water supply costs on our operating results.

Water Supply

California Water Supply

SJWC’s water supply consists of groundwater from wells, surface water from watershed run-off and diversion, reclaimed water, and imported water purchased from Valley Water under the terms of a master contract with Valley Water expiring in 2051. During normal rainfall years, purchased water provides approximately 40% to 50% of SJWC’s annual production. An additional 40% to 50% of its water supply is pumped from the underground basin which is subject to a groundwater extraction charge paid to Valley Water. Surface supply, which during a normal rainfall year satisfies about 6% to 8% of SJWC’s annual water supply needs, provides approximately 1% of its water supply in a dry year and approximately 14% in a wet year. In dry years, the decrease in availability of water from surface run-off and diversion and the corresponding increase in purchased and pumped water increases production expenses substantially. The opposite is also true where water production expenses decrease in wet years. In both instances, the impacts of surface water, purchased water, groundwater extraction, and purchased power expenses are tracked in SJWC’s Full Cost Balancing Account (“FCBA”) authorized by the CPUC for cost recovery limiting the impact on operating expenses in the current period.

The pumps and motors at SJWC’s groundwater production facilities are propelled by electric power. SJWC has installed standby power generators at 39 of its strategic water production sites and manages a fleet of 21 portable generators deployed throughout the distribution system for power outages at remaining pumping facilities. In addition, the commercial office and operations control centers are outfitted with standby power equipment that allow critical distribution and customer service operations to continue during a power outage. Valley Water has informed SJWC that its filter plants, which deliver purchased water to SJWC, are also equipped with standby generators. In the event of a power outage, SJWC believes it will be able to prevent an interruption of service to customers for a limited period by pumping water using generator power and by using purchased water from Valley Water.

In 2025, the level of water in the Santa Clara Valley groundwater basin, which is managed by Valley Water, experienced a decrease in most areas due to a decrease in managed recharge operations, a decline in natural recharge associated with less rainfall compared to 2024, and an increase in groundwater pumping. As reported by Valley Water at the end of 2025, the groundwater level in the Santa Clara Plain was six feet lower compared to the same time in 2024. The total groundwater storage at the end of 2025 was within Stage 1 (Normal) of the Valley Water’s Water Shortage Contingency Plan. On January 1, 2026, Valley Water’s 10 reservoirs were 49% of restricted capacity with 10.1 billion gallons of water in storage. As of December 31, 2025, SJWC’s Lake Elsman was 62.5% of capacity with 1.3 billion gallons of water, approximately 141.3% of the five-year seasonal average. In addition, the rainfall at SJWC’s Lake Elsman was measured at 22.12 inches for the period from July 1, 2025 through December 31, 2025, which is 116.6% of the five-year average. SJWC’s Montevina Water Treatment Plant treated 2.3 billion gallons of water in 2025, which is 104.7% of the five-year average. SJWC’s Saratoga Water Treatment Plant treated 40 million gallons of water in 2025. SJWC believes that its various sources of water supply will be sufficient to meet customer demand in 2026.

California faces long-term water supply challenges. SJWC actively works with Valley Water to meet the challenges by continuing to educate customers on responsible water use practices and conducting long-range water supply planning. Valley Water's 15% voluntary call for conservation and certain watering and water waste rules established in 2023, are still in place for 2026. The call for continued conservation is due to a major storage reservoir currently offline for seismic retrofits.

10

Table of Contents

Connecticut Water Supply

CWC’s water sources vary among the individual systems, but overall, approximately 60% of the total dependable yield comes from surface water supplies and 40% from wells. In addition, CWC has water supply agreements to supplement its water supply with the South Central Connecticut Regional Water Authority (“RWA”) and The Metropolitan District (“MDC”) that expire in 2058 and 2053, respectively. CWC believes that it will be able to meet customer demand for 2026 with its existing water supply which consists of groundwater from wells, surface water in reservoirs and purchased water treated by neighboring water utilities.

Texas Water Supply

TWC’s water supply consists of groundwater from wells and purchased treated and raw water from local water agencies. TWC has long-term agreements with the Guadalupe-Blanco River Authority (“GBRA”), which expire in 2037, 2040, 2044 and 2050. The agreements, which are take-or-pay contracts, provide TWC with an aggregate of 7,602 acre-feet of water per year from Canyon Lake at prices that may be adjusted periodically by GBRA. TWC also has treated water supply agreements with the Lower Colorado River Authority (“LCRA”) and West Travis County Public Utility Agency (“WTCPUA”) expiring in 2059 and 2046, respectively, to provide for 350 acre-feet of water per year from Lake Austin and the Colorado River, respectively, at prices that may be adjusted periodically by the agencies. Forty active production wells located in a Comal Trinity Groundwater Conservation District, a regulated portion of the Trinity aquifer, are charged a groundwater pump tax based upon usage. TWC expects to meet customer demand for 2026 with TWC’s water supply which consists of groundwater from wells, surface water and purchased treated and raw water from the GBRA, based on current conditions.

In August 2023, H2O America TX Holdings Inc.’s unregulated subsidiary, TWR, acquired eight wells and the associated water rights of KT Water Resources LLC (“KTR”). During the third quarter of 2024, TWC purchased these assets from TWR for use in utility operations. Accordingly, H2O America reclassified $28.4 million related to indefinite-lived water rights from other intangible assets to utility plant intangible assets and $11.7 million from nonutility property to utility plant. These wells have been projected to yield an additional 6,000 acre-feet per year or more. Development of the KT Water System remains ongoing.

The Texas service area is currently experiencing drought conditions that result in water usage restrictions for customers. Significant future capital investment of transmission main and storage facilities in addition to developing additional supply sources is planned for 2026 and beyond.

Maine Water Supply

Water sources at MWC vary among the individual systems, but overall, approximately 90% of the total dependable yield comes from surface water supplies and 10% from wells. MWC has a water supply agreement with the Kennebec Water District expiring in 2040. MWC believes that it will be able to meet customer demand for 2026 with its existing water supply which consists of groundwater from wells, surface water in reservoirs and purchased water treated by neighboring water utilities.

MWC relies on legislatively granted water rights in order to serve customers. In some instances, these rights were granted to predecessor water companies specially chartered by the Maine legislature many decades ago, with those entities later having been merged into MWC. The legislation incorporating these predecessor water companies did not address whether chartered rights may be transferred to another entity without special legislative action. The Maine Business Corporation Act generally provides that property and contract rights of a merged corporation are vested in the surviving corporation without reversion or impairment. In the MPUC proceedings that approved the mergers of these MWC predecessor companies, the survivorship of water rights was not contested.

Please also see further discussion under Item 1A, “Risk Factors” and Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Franchises

Franchises granted by local jurisdictions permit Water Utility Services to construct, maintain, and operate water distribution systems within the streets and other public properties of a given jurisdiction.

SJWC holds the necessary franchises to provide water in portions of the cities of San Jose and Cupertino and in the cities of Campbell, Monte Sereno and Saratoga, the Town of Los Gatos and the unincorporated areas of Santa Clara County. None of the franchises have a termination date, other than the franchise for the unincorporated areas of Santa Clara County, which terminates in 2035.

CWC’s utility services hold the necessary franchises to provide water in portions of the towns of Ashford, Avon, Beacon Falls, Bethany, Bolton, Brooklyn, Burlington, Canton, Chester, Clinton, Colchester, Columbia, Coventry, Deep River, Durham, East Granby, East Haddam, East Hampton, East Windsor, Ellington, Enfield, Essex, Farmington, Griswold, Guilford, Haddam, Hebron, Killingly, Killingworth, Lebanon, Madison, Manchester, Mansfield, Marlborough, Middlebury, Naugatuck, Old Lyme, Old Saybrook, Oxford, Plainfield, Plymouth, Portland, Prospect, Simsbury, Somers, Southbury, South Windsor, Stafford,

11

Table of Contents

Stonington, Suffield, Thomaston, Thompson, Tolland, Vernon, Voluntown, Waterbury, Westbrook, Willington, Windsor Locks and Woodstock. Additionally, the Heritage Village Water division serves the Town of Southbury with wastewater services. None of the franchises of the CWC utility services have a termination date.

MWC holds franchises necessary to provide water services in the towns served which are Biddeford, Saco, Old Orchard Beach, Scarborough (Pine Point), Porter, Parsonsfield, Hiram, Freeport, Camden, Rockland, Rockport, Owls Head, Union, Thomaston, Warren, Bucksport, Skowhegan, Oakland, Hartland, Millinocket and Greenville. None of the franchises with MWC have a termination date.

TWC holds the franchises necessary to provide water and wastewater services to the City of Bulverde and the City of Spring Branch, which terminate in 2029 and 2036, respectively. The unincorporated areas that TWC serves in Comal, Blanco, Bandera, Hays, Kendall, Medina and Travis Counties do not require water service providers to obtain franchises.

Competition

The regulated operations of Water Utility Services are public utilities regulated by applicable state public utility commissions and operate within service areas approved by such regulators. Statutory laws provide that no other investor-owned public utility may operate in the service area of another public utility of the same class (e.g., another water utility) without first obtaining from the regulator a certificate of public convenience and necessity or similar authorization. Experience shows such a certificate will be issued only after demonstrating that service in such area is inadequate.

The laws of the states in which Water Utility Services provide regulated services generally provide that municipalities, water districts, and/or other public agencies of state governments (each, a “Public Agency”) are authorized to engage in the ownership and operation of water systems. Such Public Agencies are empowered, under certain circumstances, to condemn properties, and/or exercise the right of eminent domain on property operated by privately owned public utilities, upon payment of just compensation. Furthermore, under California law, Public Agencies are authorized to issue bonds (including revenue bonds) for the purpose of acquiring or constructing water systems.

Under Connecticut law, any condemnation of water utility property by a Public Agency requires the approval of the PURA and under current Texas case law, a Public Agency may not exercise that right of eminent domain to take the entire operation of an investor-owned utility.

To the company’s knowledge, no Public Agency has any pending proceeding to condemn any part of its existing water systems, nor to exercise any eminent domain proceeding to take any of its property or operations.

Environmental Matters

Water Utility Services produces potable water and generates wastewater and hazardous wastes in accordance with all applicable county, state and federal environmental rules and regulations. Additionally, public utilities are subject to environmental regulation by various other state and local governmental authorities.

Water Utility Services is in compliance in all material respects with applicable standards under the federal SDWA, including EPA surface‐water treatment performance standards, Stage 2 Disinfectants and Disinfection Byproducts Rule (“DBPR”) requirements, and primary maximum contaminant levels (“MCLs”). These standards have been adopted and are enforced by the applicable state water, public health and environmental agencies.

Other state and local environmental regulations apply to our Water Utility Services’ operations and facilities. These regulations relate primarily to the handling, storage and disposal of hazardous materials and discharges to the environment, including wastewater operations in the States of Connecticut and Texas. In 2016, SJWC began performing hazardous materials site assessments and remediation prior to the construction phase of capital projects. The site assessments are performed to identify any legacy materials and determine the need for remediation, which is then completed to obtain site closures from the Santa Clara County Department of Environmental Health under its Voluntary Cleanup Program.

In April 2024, the EPA issued new national primary drinking water regulations for six PFAS. The regulations impose maximum contaminant levels and monitoring requirements for the nation’s water systems for six PFAS chemicals under the SDWA. The final regulation requires water systems to comply with PFAS monitoring and reporting requirements by 2027, and to comply with the maximum contaminant levels by 2029. H2O America estimates aggregate capital expenditures of approximately $400 million for PFAS treatment based on finalized maximum contaminant levels.

Water Utility Services is currently in compliance with all state and local public health and environmental regulations applicable to their operations.

Please also see Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

12

Table of Contents

Human Capital Resources

In order to continue to achieve H2O America’s mission of providing high-quality water and exceptional service while investing in the health and vitality of the communities we serve, we are committed to attract, retain and develop the highest quality talent. We believe our employees are our most important asset. Throughout our organization, our employees embrace the company’s values of do it right, do it together, and do it with heart in everything we do. Employees participate in employee engagement and satisfaction surveys providing feedback that enables the company to continually assess and implement initiatives to enhance employee satisfaction and retention. Through our board and its committees, we are empowered to address factors that impact our employee strategy and drive positive change in our company and our communities. Our human capital measures and objectives focus on providing a safe and productive work environment that has clear positive and ethical values; a culture that encourages high performance, respect for each other, and celebrates diversity; jobs that offer fair wages as benchmarked to the markets that we live and work in; competitive wages and benefits; and training and development opportunities that support our employees to establish and succeed in meaningful careers at H2O America.

Basic Workforce Data

As of December 31, 2025, H2O America had 837 full-time employees, of whom 396 were SJWC employees, 248 were CWC employees, 109 were TWC employees, and 84 were MWC employees. At SJWC, 242 employees are members of unions. Employees working for CWC, MWC and TWC are not represented by unions.

In the final quarter of 2025, SJWC executed three-year bargaining agreements with the International Union of Operating Engineers (“OE”), representing certain employees in the engineering department, and the Utility Workers of America (“UWUA”), representing the majority of all non-administrative employees at SJWC covering the period from January 1, 2026 through December 31, 2028. The agreements include a 3% wage increase provided in 2026, 3% in 2027, and 4% in 2028 for the union employees.

Employee Safety

Aiming for a “zero-harm” culture, our vision is to manage health and safety performance to become a leader in the water services industry. Protecting the health and safety of our employees is a top priority. Our employee health and safety programs, focus on four core elements:

•Safety Leadership: demonstrating management commitment and support, empowering local teams to be accountable for safety;

•Participation: involving every employee in all aspects of the safety program, connecting safety initiatives to serving employees, customers, shareholders, our communities and the environment;

•Hazard Identification and Control: inspecting workplaces, identifying hazards, implementing controls, and partnering with the front-line teams responsible for delivering reliable, clean, safe drinking water and service; and,

•Training: training employees on hazards and how to protect themselves. Incident and crisis management of both known and unknown threats to employee health and safety are anticipated and planned for by our safety team.

We have specific targets that set the trajectory of our safety program to ensure continuous improvement, including:

•Implement processes and systems to track, monitor, report and continually improve health and safety performance;

•Communicate the updated Health and Safety Policy to employees to promote compliance, consultation, and participation of workers on health and safety matters; and

•Strive for zero accidents and injuries.

We have implemented several management systems to plan and respond to workplace safety and training as well as incidents such as pandemics, wildfires, earthquakes, cyber threats and extreme weather, among others. The goal is to safeguard our employees’ health and safety during local, national, or global incidents. Locally, workplace hazards are identified by onsite inspections and from near-miss investigations. More broadly, the team collaborates to anticipate and plan for external events such as a pandemic or for extreme weather or other external events that could impact our operations. Proactive identification of hazards keeps us one step ahead of our constantly changing workplace conditions.

Engagement and Satisfaction

H2O America has invested significantly in employee engagement and satisfaction in alignment with its values and five building blocks of Community, Customers, Employees, Environment and Shareholders. Employees across H2O America identified and adopted three core values to guide their work and interactions: do it right, do it together and do it with heart. Our leadership employs a servant leadership model where all leaders are encouraged and expected to provide service to their people ensuring that they continue to grow and thrive in their profession, knowledge, and general well-being. Regular “Straight Talk” meetings, employee town halls and quarterly “Leadership on Tap” gatherings are held to continue to build and support our culture and

13

Table of Contents

values. Additionally, the company provides ongoing opportunities for employee recognition from peers and leaders and also administers an employee engagement and satisfaction survey twice per year.

Community Involvement

In support of our mission, we are dedicated to the people and the environment of the communities where we live, work, and serve. H2O America provides various opportunities for our employees to participate in outreach programs from free virtual education programs for adults, employee-led courses for elementary school aged children, winter coat donation drives, environmental cleanups, community events, and grant programs supporting schools and fire departments. The Force for Good Foundation, established in 2024, is a non-consolidated not-for-profit corporation funded by H2O America that is making contributions to selected charitable organizations with a focus on the communities served. SJWC and CWC also have matching donations for certain programs to further promote our employees’ involvement in their communities. In California, the SJWC Employees Community Fund is a 501(c)(3) charitable organization that uses funds from employee contributions and company matches to provide grants to non-profit organizations supported by our employees. H2O America has a key commitment to supporting local non-profits through the Force for Good Foundation and building strong community ties.

Fair Wages and Competitive Benefits

H2O America’s future success is largely dependent upon our ability to attract and retain highly skilled and qualified employees. Our California and Connecticut subsidiaries operate in particularly competitive labor markets; we believe our compensation package and benefit programs allow us to recruit and retain talented and qualified personnel. Our compensation and benefits programs include:

•Fair employee wages as benchmarked to the markets that our employees live and work in that are consistent with employee roles and responsibilities, skill levels, experience, and knowledge;

•Engagement of nationally, recognized outside compensation and benefits consulting firms to independently evaluate the appropriateness and effectiveness of compensation for our executive and other officers and to provide benchmarks for executive compensation as compared to peer companies;

•Short-term incentive compensation for management level staff aligning with company financial and operational goals targeted to our stakeholders: customers, communities, employees, and stockholders;

•Alignment with stockholder value by utilizing equity awards linked to investment performance over time, as well as certain absolute financial results;

•A comprehensive annual employee performance review process pursuant to which we determine and communicate to employees annual merit increases, promotions and other changes to responsibilities and duties; and

•Eligibility for all full-time employees to participate in health insurance, dental, vision, cafeteria plans, life and disability/accident coverage, retirement plans and/or salary deferral plans, an employee stock purchase plan, paid and unpaid leaves, a commuter assistance program, professional education and training, and tuition assistance.

14

Table of Contents

Executive Officers of the Registrant

The following table summarizes the name, age, offices held and business experience for each of our executive officers, as of February 26, 2026:

Name Age Offices and Experience

15

Table of Contents

Principal Accounting Officer of the Registrant

The following table summarizes the name, age, offices held and business experience for our principal accounting officer, as of February 26, 2026:

Name Age Offices and Experience

Available Information

H2O America’s Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, and amendments to these reports, are made available free of charge through H2O America’s website at www.h2o-america.com, as soon as reasonably practicable, after H2O America electronically files such material with, or furnishes such materials to, the SEC. The content of H2O America’s website is not incorporated by reference to or part of this report.

You may obtain electronic copies of our reports filed with the SEC on the SEC website at http://www.sec.gov.

Item 1A.Risk Factors

Investors should carefully consider the following risk factors and warnings before making an investment decision. The risks described below are not the only ones facing H2O America and its subsidiaries. Additional risks that H2O America and its subsidiaries does not yet know of or that it currently thinks are immaterial may also impair its business operations. If any of the following risks actually occur, H2O America and its subsidiaries’ business, operating results or financial condition could be materially affected. In such case, the trading price of H2O America’s common stock could decline and you may lose part or all of your investment. Investors should also refer to the other information set forth in this Annual Report on Form 10-K, including the consolidated financial statements and the notes thereto.

Risks Relating To Quadvest Acquisition

The following discusses certain risk factors relating to the proposed transactions with Quadvest, and does not include all of the risk factors associated with the proposed transactions and H2O America after the proposed transactions.

Our proposed transactions with Quadvest are subject to the receipt of consents and clearances from regulatory authorities that may impose conditions that could have an adverse effect on H2O America or, if not obtained, could prevent completion of the proposed transactions.

Completion of the proposed transactions is contingent upon, among other things, the receipt of all required regulatory approvals, which consist of compliance with and filings and the applicable waiting period under the Hart Scott-Rodino Antitrust Improvements Act, compliance with and applications for permits with state and municipal agencies and consent required by the PUCT for the transfer of Quadvest’s water and sewer utility business (the “Regulated Business”).

16

Table of Contents

The terms and conditions of the approvals that are granted by such governmental entities and regulatory authorities may impose requirements, limitations, costs, or place restrictions on the conduct of H2O America’s business. The asset purchase agreements may require H2O America to comply with conditions imposed by regulatory entities and, in certain circumstances, either company may refuse to close the proposed transactions on the basis of regulatory conditions imposed. There can be no assurance that regulators will not impose conditions, terms, obligations or restrictions or that such conditions, terms, obligations or restrictions will not have the effect of delaying completion of the proposed transactions or imposing additional material costs on or materially limiting the revenues of H2O America following the proposed transactions. Additionally, H2O America cannot provide assurance that any such conditions, terms, obligations or restrictions will not result in the delay or abandonment of the proposed transactions, or the consummation of the proposed transactions on terms different than those contemplated by the asset purchase agreements.

The length of the regulatory approval process required by the PUCT, which may be extended beyond its current estimates, may reduce or eliminate the benefits to be achieved under the proposed transactions.

As a condition to the consummation of the proposed transactions, the sale of the Regulated Business must be approved by the PUCT. While we expect the transaction to receive PUCT approval by mid-2026, the exact timeline for this approval process is unknown and may not occur until later, if at all.

In addition to the required regulatory clearances, the proposed transactions are subject to a number of other conditions beyond H2O America’s control that may prevent, delay or otherwise materially adversely affect its completion. We cannot predict whether and when these other conditions will be satisfied. Furthermore, the requirements for obtaining the required clearances and approvals could delay the completion of the proposed transactions for a significant period of time or prevent them from occurring. Any delay in completing the proposed transactions could cause H2O America to not realize, or to be delayed in realizing, some or all of the benefits that we expect to achieve if the proposed transactions are successfully completed within the expected time frame. Failure to achieve these anticipated benefits within the expected time frame could result in increased costs and/or lower-than-expected revenues or income generated by H2O America after the completion of the proposed transactions.

We may be unable to successfully integrate Quadvest’s business with ours and realize the anticipated benefits of the acquisition, which could negatively impact the future business and financial results of H2O America.

The anticipated benefits expected from the proposed transactions are based on projections and assumptions about the combined Quadvest and H2O America businesses, which may not materialize as expected or which may prove to be inaccurate. Achieving the benefits of the proposed transactions will depend, in part, on H2O America’s ability to integrate the business and operations of Quadvest successfully and efficiently with our business. The challenges involved in this integration, which will be complex and time-consuming, include the following:

•successfully managing relationships with our combined customer base and retaining Quadvest’s customers;

•the ability to successfully integrate Quadvest’s business with ours in a manner that permits H2O America to achieve the synergies and other benefits anticipated to result from the proposed transactions;

•integrating complex systems, operating procedures, regulatory compliance programs, technology, networks, and other assets of Quadvest and H2O America in a manner that minimizes any adverse impact on customers, suppliers, employees, and other constituencies;

•diversion of the attention of the management and other key employees of Quadvest and H2O America;

•integrating the workforces of Quadvest and H2O America while maintaining focus on providing clean, high quality water and exceptional service;

•disruption of, or the loss of momentum in, the ongoing business of H2O America;

•liabilities that are significantly larger than we currently anticipate and unforeseen increased expenses or delays associated with the proposed transactions, including transition costs to integrate the businesses of Quadvest and H2O America, that may exceed the costs that we currently anticipate; and

•the increased scale of our operations resulting from the proposed transactions.

If we do not successfully manage these issues and the other challenges inherent in integrating Quadvest, then we may not achieve the anticipated benefits of the proposed transactions and our business, financial condition and results of operations could be materially adversely affected.

Failure to complete the proposed transactions as currently contemplated or at all could negatively impact the stock price, business operations and financial results of H2O America.

17

Table of Contents

Completion of the proposed transactions is not assured and is subject to risks, including the risks that approval of the proposed transactions by governmental entities will not be obtained or that certain other closing conditions will not be satisfied. If the proposed transactions are not completed, or are completed on different terms than as contemplated by the asset purchase agreements, the ongoing businesses and financial results of H2O America may be adversely affected and H2O America will be subject to several risks, including the following:

•having to pay certain significant costs relating to the proposed transactions without receiving the benefits of the proposed transactions, including, in certain circumstances, payment of a termination fee;

•reputational harm due to the adverse public perception of any failure to successfully complete the proposed transactions; and

•H2O America’s management having focused on the proposed transactions instead of on conducting its day-to-day business and operational matters and pursuing other opportunities that could have been beneficial to the companies.

Any delay in the completion of the proposed transactions, any uncertainty about the completion of the proposed transactions on terms other than those contemplated by the asset purchase agreements and any failure to complete the proposed transactions could adversely affect the business, financial results and stock price of H2O America.

The asset purchase agreements with Quadvest may be terminated in certain circumstances, which would result in the benefits of the proposed transactions not being realized, and under certain circumstances, we may be required to pay a termination fee.

Either H2O America or Quadvest may terminate the asset purchase agreements under certain circumstances, including if the proposed transactions have not been consummated by January 7, 2027 (unless such date is extended to a date mutually agreed to by the parties to obtain regulatory approval under certain circumstances, which could be up to an additional eighteen months). However, this termination right will not be available to a party if such failure to complete the proposed transactions on or before such date is the result of such party’s failure to perform or comply, in all material respects, with any of the covenants, agreements or conditions of the asset purchase agreements. If we are not able to complete the proposed transactions by the end date, even if we decide not to terminate the asset purchase agreements, we may not be able to prevent Quadvest from exercising its right to terminate the asset purchase agreements.

In addition, if the asset purchase agreements are terminated under certain circumstances related to regulatory approvals, H2O America may be required to pay to Quadvest a termination fee of $21 million.

Failure to obtain financing for the proposed transactions on favorable terms or at all could negatively impact the operating results and financial condition of H2O America.

H2O America may seek to raise capital to finance the proposed transactions, including through the issuance of debt or equity securities. There can be no assurance that such financing will be available on favorable terms, or at all. The incurrence of additional indebtedness could adversely affect H2O America’s financial condition, results of operations, or cash flows. Additionally, equity financings may result in dilution to our existing stockholders and debt financings may contain covenants that restrict the actions of H2O America and its subsidiaries. Furthermore, any downgrade in H2O America’s credit ratings by rating agencies may negatively impact the market value and liquidity of H2O America’s debt and equity securities.

Risks Relating To Regulatory and Legal Matters

Our business is regulated and may be adversely affected by changes to the regulatory environment.

Our Water Utility Services primarily represent the tariffed operations of our regulated utilities. Our operating revenue is generated primarily from the sale of water at rates authorized by applicable state public utility commissions (the “Regulators”). The Regulators set rates that are intended to provide revenues sufficient to recover normal operating expenses, provide funds for replacement of water infrastructure and produce a fair and reasonable return on stockholder common equity. Please refer to Part I, Item 1, “Regulation and Rates” for a discussion of the most recent regulatory proceedings affecting the rates of our regulated operations. Consequently, our revenue and operating results depend substantially upon the rates the Regulators authorize.

In some of our applications for rate approvals, we rely upon estimates and forecasts to propose rates for approval by the Regulators. No assurance can be given that our estimates and forecasts will be accurate or that the Regulators will agree with our estimates and forecasts and approve our proposed rates. To the extent our authorized rates may be too low, revenues may be insufficient to cover Water Utility Services’ operating expenses, capital requirements and H2O America’s historical dividend rate. In addition, delays in approving rate increases may negatively affect our operating results and operating cash flows.

18

Table of Contents

In addition, policies and regulations promulgated by the Regulators govern the recovery of capital expenditures, the treatment of gains from the sale of real utility property, the offset of production and operating costs, the recovery of the cost of debt, the optimal equity structure, and the financial and operational flexibility to engage in non-tariffed operations. If the regulators implement policies and regulations that will not allow Water Utility Services to accomplish some or all of the items listed above, its future operating results may be adversely affected. Furthermore, from time to time, the commissioners at the Regulators may change. Such changes could lead to changes in policies and regulations and there can be no assurance that the resulting changes in policies and regulation, if any, will not adversely affect our operating results or financial condition.

We have various regulatory mechanisms such as balancing and memorandum accounts and rate adjustment mechanisms for infrastructure replacements and/or improvements, to recover certain costs and expenses. If the Regulators disagree with our calculations of our balancing and memorandum accounts, we may be required to make adjustments that could adversely affect our results of operations. Furthermore, there is no guarantee that the Regulators will approve our applications to recover all or a portion of our capital expenditure or infrastructure investment through such rate adjustment mechanisms, and their failure to do so will adversely affect our financial conditions and results of operations.

Recovery of regulatory assets is subject to adjustment by regulatory agencies and could impact the operating results of Water Utility Services.

Generally accepted accounting principles (“GAAP”) for water utilities include the recognition of regulatory assets and liabilities to reflect the actions of regulators as permitted by Financial Accounting Standards Board (“FASB”) ASC Topic 980—“Regulated Operations.” These actions may result in the recognition of revenues and expenses in time periods that are different from non-rate-regulated enterprises. In accordance with ASC Topic 980, Water Utility Services record deferred costs on the balance sheet as regulatory assets when it is probable that these costs will be recovered in the ratemaking process. Also, Water Utility Services record regulatory liabilities for amounts expected to be refunded to customers in the ratemaking process and for amounts collected in advance of the related expenditures. Please refer to Note 3 of the “Notes to Consolidated Financial Statements” for a summary of regulatory assets and liabilities. If the assessment of the probability of recovery in the ratemaking process is incorrect and the applicable ratemaking body determines that a deferred cost is not recoverable through future rate increases, the regulatory assets would need to be adjusted, which could have an adverse effect on our results of operations and financial condition.

Water Utility Services is subject to litigation risks concerning water quality and contamination.

In October 2023, CWC, a subsidiary of H2O America in our Water Utility Services segment, was named as a defendant in a class action lawsuit alleging that the water provided by CWC contained contaminants. CWC is vigorously defending itself in this lawsuit. There can be no guarantee that additional lawsuits will not occur in the future. Any environmental or product-related lawsuit, including the class action against CWC, may require us to incur significant legal costs and we may not be able to recover the legal costs from ratepayers or other third parties. Although Water Utility Services has liability insurance coverage for bodily injury and property damage, pollution liability is excluded from this coverage and our excess liability coverage. Pollution liability coverage is in place for the majority of the H2O America locations and operations but is subject to exclusions and limitations. In addition, any complaints or lawsuits against us based on water quality and contamination may receive negative publicity that can damage our reputation and adversely affect our business and trading price of our common stock.

Water Utility Services is subject to possible litigation or regulatory enforcement action concerning water discharges to Waters of the United States (“WOTUS”).

Regulatory actions and fines related to discharges of water to WOTUS against other water utilities have increased in frequency in recent years. If Water Utility Services is subject to a litigation or regulatory enforcement action, it might incur significant costs in fines and restoration efforts, and it is uncertain whether Water Utility Services would be able to recover some or all of such costs from ratepayers or other third parties. In addition, any litigation or regulatory enforcement action against us regarding a water discharge and/or resulting environmental impact may receive negative publicity that can damage our reputation and adversely affect our business and the trading price of our common stock.

Streamflow regulations in Connecticut could potentially impact our ability to serve our customers.

In December 2011, regulations concerning the flow of water in Connecticut’s rivers and streams were adopted. As promulgated, the regulations require that certain downstream releases be made from seven of CWC’s eighteen active reservoirs no later than ten years following the adoption of stream classifications by the Department of Energy and Environmental Protection (“DEEP”). Currently, downstream releases are made at four locations. The next streamflow releases will be initiated by February 2028 and will affect two additional reservoirs. No groundwater supply wells are affected by the regulations.

19

Table of Contents

DEEP has finalized stream classifications in all areas of Connecticut where CWC maintains and operates sources of supply. The Company remains engaged in the process in order to minimize the impact to our available water supply. Although modified from prior versions, the regulations still have the potential to lower our safe yield, raise our capital and operating expenses and adversely affect our revenues and earnings. Although costs associated with the regulations may be recovered in the form of higher rates and Connecticut law allows for a WICA surcharge to recover capital improvement costs necessary to achieve compliance with the regulations, there can be no assurance PURA would approve rate increases to enable us to recover all such costs and surcharges.

New or more stringent environmental regulations could increase Water Utility Services’ operating costs and affect its business.

Water Utility Services is subject to water quality and pollution control regulations issued by the EPA and environmental laws and regulations administered by the respective states and local regulatory agencies.

New or more stringent environmental and water quality regulations could increase Water Utility Services’ water quality compliance costs, hamper Water Utility Services’ available water supplies, and increase future capital expenditures.

Under the federal Safe Drinking Water Act (“SDWA”), Water Utility Services is subject to regulation by the EPA relating to the quality of water it sells and treatment techniques it uses to make the water potable. The EPA promulgates, from time to time, nationally applicable standards, including maximum contaminant levels for drinking water. For example, in April 2024, the EPA issued new national primary drinking water regulations for PFAS. The regulations impose maximum contaminant levels and monitoring requirements for the nation’s water system for six PFAS chemicals under the SDWA. The final regulation requires water systems to comply with PFAS monitoring requirements by 2027, and to comply with the maximum contaminant levels by 2029. H2O America estimates capital expenditures of approximately $400 million for PFAS treatment based on finalized maximum contaminant levels. Additional or more stringent requirements may be adopted by each state. There can be no assurance that Water Utility Services will be able to continue to comply with all water quality requirements.

Water Utility Services has implemented monitoring activities and installed specific water treatment improvements in order to comply with existing maximum contaminant levels and plan for compliance with future drinking water regulations. However, the EPA and the respective state agencies have continuing authority to issue additional regulations under the SDWA. New or more stringent environmental standards could be imposed that will raise Water Utility Services’ operating costs and capital expenditures, including requirements for increased monitoring, additional treatment of underground water supplies, fluoridation of all supplies, more stringent performance standards for treatment plants, additional procedures to further reduce levels of disinfection by-products, and more comprehensive measures to monitor, reduce or eliminate known or newly identified contaminants, such as PFAS. There are currently regulatory mechanisms and procedures available to us for the recovery of such costs, however, there can be no assurance that such costs will be fully recovered and failure to do so may adversely affect our operating results.

The impact of climate change and climate change laws and regulations have been passed and are being proposed that require compliance with greenhouse gas emissions standards, as well as other climate change initiatives, which could increase Water Utility Services’ operating costs and affect our business.

Climate change is receiving ever increasing attention worldwide. Many scientists, legislators, and others attribute global warming to increased levels of greenhouse gases, including carbon dioxide. Climate change laws and regulations enacted and proposed limit greenhouse gases emissions from covered entities and require additional monitoring/reporting. We produce a corporate sustainability report, which provides an overview of our energy usage and greenhouse emissions. At this time, the existing greenhouse gases laws and regulations are not expected to materially impact Water Utility Services’ operations or capital expenditures. While regulation on climate change could change, the uncertainty of future climate change regulatory requirements still remains. We cannot predict the potential impact of future laws and regulations on our business, financial condition, or results of operations. Although these future expenditures and costs for regulatory compliance may be recovered in the form of higher rates, there can be no assurance that the various state utility commissions that govern our business would approve rate increases to enable us to recover such expenditures and costs.

Climate change may also impact water supply. For example, severity of drought conditions may impact the availability of water to all Water Utility Services and rising sea levels and their effect on contributing tributary’s water quality may impact the availability of groundwater to Water Utility Services.

We may be at risk for litigation under the principle of inverse condemnation for activities in the normal course of business that have a damaging effect on private property.

Under the California legal doctrine of inverse condemnation, a public utility taking or damaging private property can be responsible to the property owners for compensation, even when damage occurs through no fault or negligence of the utility company and regardless of whether the damage could be foreseen. Based upon existing California case law, SJWC could be

20

Table of Contents

sued under the doctrine of inverse condemnation and held liable if its facilities, operations or property, such as mains, fire hydrants, power lines and other equipment, or wildfires in our Santa Cruz Mountain watershed result in damage to private property.

A court finding of inverse condemnation does not obligate the CPUC to allow SJWC to recover damage awards or pass on costs to ratepayers. Insurance coverage for inverse condemnation may not be available or may not be sufficient. SJWC’s liquidity, earnings, and operations may be adversely affected if we are unable to recover the costs of paying claims for damages caused by the operation and maintenance of our property from customers or through insurance.

Our water utility property and systems are subject to condemnation and other proceedings through eminent domain.

State laws in jurisdictions where we operate, including California, Connecticut, Texas and Maine, allow municipalities, water districts and other public agencies to own and operate water systems. If these public agencies are able to establish certain eminent domain elements required under state and federal laws, they may condemn water systems or real property owned by privately owned public utilities in certain circumstances. In general, if a public agency seeks to exercise its eminent domain power to take possession of private property, it must establish that such taking is for a public purpose and must pay just compensation to owners of such property. In the event of eminent domain or condemnation proceedings against our water utility property or systems, we may incur substantial attorney’s fees, consultant and expert fees and other costs in considering a challenge to such proceeding and/or its valuation for just compensation, as well as fees and costs in any subsequent litigation if necessary. If the public agency prevailed and acquired our utility property, we would no longer have access to the condemned property or water system, neither would we be entitled to any portion of revenue generated from the use of such asset going forward. Furthermore, if public agencies succeed in acquiring our assets, there is a risk that we will not receive adequate compensation for the assets taken or be able to recover all charges associated with the condemnation of such assets, which may adversely affect our business operations and financial conditions.

Regulatory agencies may disagree with our valuation and characterization of certain of our assets.

If we determine that assets are no longer used or useful for utility operations, we may remove them from our rate base and subsequently sell those assets with any gain on sales accruing to the stockholders, subject to certain conditions. If the regulators disagree with our characterization, there is a risk that the regulators could determine that a portion or all of the realized appreciation in property value should be awarded to customers rather than our stockholders.

Risks Relating To Business Operations

The adequacy of our water supplies depends upon a variety of factors beyond our control. Interruption in the water supply may adversely affect our reputation and earnings.

We depend on an adequate water supply to meet the present and future needs of our customers. Whether we have an adequate supply varies depending upon a variety of factors, many of which are partially or completely beyond our control, including:

•the amount of rainfall;

•the amount of water stored in reservoirs;

•underground water supply from which well water is pumped;

•availability from water wholesalers;

•changes in the amount of water used by our customers;

•water quality and availability of appropriate treatment technology;

•legal limitations on water use such as rationing restrictions during a drought;

•changes in prevailing weather patterns and climate; and

•population growth.

We purchase our water supply from various governmental agencies and others. Water supply availability may be affected by weather conditions, funding and other political and environmental considerations. In addition, our ability to use surface water is subject to regulations regarding water quality and volume limitations. If new regulations are imposed or existing regulations are changed or given new interpretations, the availability of surface water may be materially reduced. A reduction in surface water could result in the need to procure more costly water from other sources, thereby increasing our water production costs and adversely affecting our operating results if not recovered in rates on a timely basis. From time to time, we enter into water supply agreements with third parties and our business is dependent upon such agreements in order to meet regional demand.

21

Table of Contents

The parties from whom we purchase water maintain significant infrastructure and systems to deliver water to us. The maintenance of these facilities is beyond our control. If these facilities are not adequately maintained or if these parties otherwise default on their obligations to supply water to us, we may not have adequate water supplies to meet our customers’ needs.

If we are unable to access adequate water supplies, we may be unable to satisfy all customer demand, which could result in rationing. Rationing may have an adverse effect on cash flow from operations. We can make no guarantee that we will always have access to an adequate supply of water that will meet all required quality standards. Water shortages may affect us in a variety of ways. For example, shortages could:

•adversely affect our supply mix by causing us to rely on more expensive purchased water;

•adversely affect operating costs;

•increase the risk of contamination to our systems due to our inability to maintain sufficient pressure; and

•increase capital expenditures for building pipelines to connect to alternative sources of supply, new wells to replace those that are no longer in service or are otherwise inadequate to meet the needs of our customers and reservoirs and other facilities to conserve or reclaim water.

We may or may not be able to recover increased operating and construction costs on a timely basis, or at all, for our regulated systems through the ratemaking process. We can give no assurance, as to whether we may be able to recover certain of these costs from third parties that may be responsible, or potentially responsible, for any groundwater contamination.

The concentration of our business in California, Texas and Connecticut makes us susceptible to adverse developments affecting these states.

While H2O America operates in multiple states, a significant majority of our current revenues and earnings are generated by our California and Connecticut operations. Following the consummation of the transactions with Quadvest, a significant amount of our revenues and earnings will also be generated by our Texas operations. As a result, our financial results are largely subject to political, regulatory, economic, water supply, weather, labor, and energy cost risks affecting California and Connecticut and, following the consummation of the transactions with Quadvest, Texas.

We face competition from other utilities and service providers which might hinder our growth opportunities and mitigate our future profitability.

We face competition from other utilities and service providers which might hinder our growth opportunities and mitigate our future profitability. We face risks of competition from other utilities or other entities authorized by federal, state or local agencies to expand rate-regulated or contracted utility services. Once a state utility regulator grants a franchise to a public utility to serve a specific territory, that utility effectively has an exclusive right to service that territory. Although a new franchise offers some protection against competitors, the pursuit of franchises is often competitive, where new franchises may be awarded to utilities based upon competitive negotiation. Competing entities have challenged, and may challenge in the future, our applications for new franchises.

Fluctuations in customer demand for water due to seasonality, restrictions of use, weather, and lifestyle can adversely affect operating results.

Water Utility Services is seasonal, thus quarterly fluctuation in results of operations may be significant. Rainfall and other weather conditions also affect Water Utility Services. Water consumption typically increases during the third quarter of each year when weather tends to be warm and dry. In periods of drought, if customers are encouraged or required to conserve water due to a shortage of water supply or restriction of use, revenue tends to be lower. Similarly, in unusually wet periods, water supply tends to be higher and customer demand tends to be lower, again resulting in lower revenues. Furthermore, certain lifestyle choices made by customers can affect demand for water. For example, a significant portion of residential water use is for outside irrigation of lawns and landscaping. If there is a decreased desire by customers to maintain landscaping for their homes or restrictions are placed on outside irrigation, residential water demand would decrease, which would result in lower revenues.

Conservation efforts and construction codes, which require the use of low-flow plumbing fixtures and appliances, could diminish water consumption and result in reduced revenue. In addition, in time of drought, mandatory water conservation may become a requirement that impacts the water usage of our customers. While the impacts of conservation and drought may be mitigated by certain regulatory mechanisms that may apply, such regulatory mechanisms are subject to review and change by

22

Table of Contents

the Regulators. Accordingly, there could be no assurance that such regulatory mechanisms will offset the effects of any revenue losses or other adverse impacts to our operating results attributable to these fluctuations in customer demand.

A contamination event or other decline in source water quality could affect the water supply of Water Utility Services and therefore adversely affect our business and operating results.

Water Utility Services is required under drinking water regulations to comply with water quality requirements. Through water quality compliance programs, Water Utility Services monitors for contamination and pollution of its sources of water. In addition, a watershed management program provides a proactive approach to minimize potential contamination activities. There can be no assurance that Water Utility Services will continue to comply fully with all applicable water quality requirements or detect contamination timely or at all. In addition, our facilities and infrastructure, including water towers, reservoirs and wells, may be subject to vandalism, break-ins or attacks, which may cause contamination or damage to our water supply. While we have taken measures to maintain physical security of our facilities, there is no guarantee that such measures will be effective to prevent such events.In the event a contamination is detected, Water Utility Services must either commence treatment to remove the contaminant or procure water from an alternative source. Either of these results may be costly, may increase future capital expenditures and there can be no assurance that the regulators would approve a rate increase to enable us to recover the costs arising from such remedies. In addition, we could be held liable for consequences arising from hazardous substances or contamination in our water supplies or other environmental damages and our reputation may be harmed by the public disclosures or media reports of these events. Our insurance policies may not cover or may not be sufficient to cover the costs of these claims.

Operating under contract water and waste systems subject us to risks.

Water Utility Services operates a number of water and wastewater systems under operation and maintenance contracts. Pursuant to these contracts, such systems are operated according to the standards set forth in the applicable contract, and it is generally the responsibility of the owner of the system to undertake capital improvements over which we may not have control. We may not be able to convince the owner to make needed improvements in order to maintain compliance with applicable regulations. Although violations and fines incurred by water and wastewater systems may be the responsibility of the owner of the system under these contracts, such non-compliance events may reflect poorly on us as the operator of the system and harm our reputation, and in some cases, may result in liability to the same extent as if we were the owner.

The necessity for ongoing physical and technological security has resulted, and may continue to result, in increased operating costs.

The necessity for ongoing physical and technological security has resulted, and may continue to result, in increased operating costs. Because of physical and technological threats to the health and security of the United States of America, we employ procedures to review and modify security measures. We provide ongoing training and communications to our employees about threats to our water supply, our assets and related systems and our employees’ personal safety. We have incurred, and will continue to incur, costs for security measures in efforts to protect against such risks.

Water Utility Services rely on information technology and systems that are key to business operations. A system malfunction, security breach, cyber-attacks, or other disruption that compromises our information could expose us to liability and adversely affect business operations. In addition, noncompliance could expose us to liability and adversely affect business operations.

Information technology is key to the operation of Water Utility Services, including but not limited to payroll, general ledger activities, outsourced bill preparation and remittance processing, providing customer service and the use of supervisory control and data acquisition systems to operate our distribution system. Among other things, system malfunctions, computer viruses and security breaches could prevent us from operating or monitoring our facilities, billing, and collecting cash accurately and timely analysis and reporting of financial results. In addition, we collect, process, and store sensitive data from our customers and employees, including personally identifiable information, on our networks. Despite our security measures, our information technology and infrastructure may be vulnerable to attacks by hackers or may be breached due to employee error, malfeasance, or other disruptions. Any such breach could compromise our networks, and the information stored there could be accessed without our authorization, publicly disclosed, lost, or stolen which could result in legal claims or proceedings, violation of privacy laws or damage to our reputation and customer relationships. Our profitability and cash flow could be affected negatively in the event these systems do not operate effectively or are breached. We also rely on third-party technology vendors for critical services, including data hosting and infrastructure support. A failure or breach by these vendors could also expose our systems and sensitive information to unauthorized access or disruption. Further, ransomware and other forms of disruptive or disabling cyber-attacks targeting utility systems and other infrastructure are continuously increasing in sophistication, magnitude and frequency, and may not be recognized until launched against a target. The use of artificial intelligence by cybercriminals may increase the frequency and severity of cybersecurity attacks, including against us or our third-party

23

Table of Contents

vendors. Accordingly, we may be unable to anticipate these techniques or to entirely eliminate this risk. In addition, we may not be able to develop or acquire information technology that is competitive and responsive to the needs of our business, and we may lack sufficient resources to make the necessary upgrades or replacements of our outdated existing technology to allow us to continue to operate at our current level of efficiency. These risks may escalate during periods of heightened geopolitical tension.

In addition, we must comply with privacy laws such as The California Consumer Privacy Act, as amended by the California Privacy Rights Act (collectively, the “CCPA”). The CCPA requires, among other things, covered companies to provide enhanced disclosures to California consumers and to afford such consumers certain privacy rights and consumer protections. The CCPA also establishes statutory damages for victims of data security breaches, and provides additional rights for consumers to obtain their data from any business that has their personally identifying information. We are anticipating updated and finalized implementing regulations under the CCPA that may impact our compliance obligations. We are also subject to other comprehensive state privacy laws with similar obligations, including the Connecticut Data Privacy Act and the Texas Data Privacy and Security Act. While some of these laws include limited exceptions for data collected by utilities, the exceptions generally do not remove all obligations imposed by the laws.

Moreover, additional federal and state privacy and cybersecurity laws and regulations have been passed or may be passed in the future, and they may have potential compliance obligations that impact our operations depending on whether we fall under their scope. The effects of these laws have been significant, requiring us to modify our data processing practices and policies and to incur costs and expenses for compliance. Any actual or perceived noncompliance with applicable data privacy or cybersecurity laws may lead to investigations, claims, and proceedings by governmental entities and private parties, damages for breach, and cause us to incur other significant costs, penalties, and other liabilities, as well as harm to our reputation.

A failure of our reservoirs, storage tanks, mains or distribution networks could result in losses and damages that may adversely affect our financial condition and reputation.

We distribute water through an extensive network of mains and store water in reservoirs and storage tanks located across our service areas. The Water Utility Services’ distribution systems were constructed during the period from the early 1900’s through today. We routinely assess the operational quality of our mains and have implemented various main replacement programs throughout our service territory to better mitigate potential main failures. A failure of major mains, reservoirs, or tanks could result in injuries and damage to residential and/or commercial property for which we may be responsible, in whole or in part. The failure of major mains, reservoirs or tanks may also result in the need to shut down some facilities or parts of our water distribution network in order to conduct repairs. Such failures and shutdowns may limit our ability to supply water in sufficient quantities to our customers and to meet the water delivery requirements prescribed by governmental regulators, which could adversely affect our financial condition, results of operations, cash flow, liquidity and reputation. We also own and operate numerous dams in California, Connecticut and Maine, and a failure of such dams could result in losses and damages that may adversely affect our financial condition and reputation. Any business interruption or other losses might not be covered by existing insurance policies or be recoverable in rates, and such losses may make it difficult for us to secure insurance in the future at acceptable rates. Our insurance policies may not cover or may not be sufficient to cover the costs of these claims.

The operations of our water and wastewater treatment plants involve physical, chemical, and biological processes and the use of pumps, generators, and other industrial equipment. As a result, our operations are subject to various industrial risks, including chemical spills, discharges or releases of toxic or hazardous substances or gases, effects resulting from confined operating spaces, fires, explosions, mechanical failures, storage tank leaks, and electric shock. These risks can result in personal injury, loss of life, catastrophic damage to or destruction of property and equipment or environmental damage, and related legal proceedings, including those commenced by regulators, neighbors, or others. They may also result in an unanticipated interruption or suspension of our operations and the imposition of liability. The loss or shutdown over an extended period of operations at any of our treatment facilities or any losses relating to these risks could have a material adverse impact on our profitability, results of operations, liquidity, and cash flows.

Our business and financial performance may be adversely affected by high inflation.

Inflation has the potential to adversely affect our liquidity, business, financial condition and results of operations by increasing our overall cost structure, particularly if we are unable to achieve increases in the rates we charge our customers. There is no guarantee that any future rate increase requests will be approved and granted in a timely manner and/or will be sufficient to cover costs for the impact of high inflation. The existence of inflation in the economy has resulted in, and may continue to result in, higher interest rates and capital costs, shipping costs, supply shortages, increased costs of labor and other similar effects. As a result of inflation, we have experienced and may continue to experience, cost increases. Although we may take measures to mitigate the impact of this inflation, if these measures are not effective, our business, financial condition, results of operations and liquidity could be materially adversely affected. Even if such measures are effective, there could be a difference between the timing of when these beneficial actions impact our results of operations and when the cost of inflation is incurred.

24

Table of Contents

Work stoppages and other labor relations matters could adversely affect our business and operating results.

As of December 31, 2025, 242 of our 837 total employees were union members. Most of our unionized employees are represented by the UWUA, except certain employees in the engineering department who are represented by the OE. Only employees at SJWC are union members. Both of the 3-year union contracts were signed on December 31, 2025 and will expire December 31, 2028.

We may experience difficulties and delays in the collective bargaining process to reach suitable agreements with union employees, particularly in light of increasing healthcare and pension costs. In addition, changes in applicable law and regulations could have an adverse effect on management’s negotiating position with the unions. Labor actions, work stoppages or the threat of work stoppages, and our failure to obtain favorable labor contract terms during future negotiations may adversely affect our business, financial condition, results of operations, cash flows and liquidity.

If we fail to maintain safe work sites, we can be exposed to not only people impacts but also to financial losses such as penalties and other liabilities.

Our safety record is critical to our reputation because our business operation involves inherently dangerous activities. We maintain health and safety standards to protect our employees, customers, vendors and the public. Although we intend to adhere to such health and safety standards and aim for zero injuries, it is difficult to avoid accidents at all times.

Our business sites, including construction and maintenance sites, often place our employees and others in close proximity with large pieces of heavy equipment, moving vehicles, pressurized water, underground trenches and vaults, chemicals and other regulated materials. On many sites we are responsible for safety and, accordingly, must implement safety procedures. If we fail to implement such procedures or if the procedures we implement are ineffective or are not followed by our employees or others, or if accidents occur outside of our control, our employees and others may be injured or die. Unsafe work sites also have the potential to increase employee turnover and raise our operating costs. Any of the foregoing could result in financial losses, which could have a material adverse impact on our business, financial condition, results of operations and cash flows.

In addition, our operations can involve the handling and storage of hazardous chemicals, which, if improperly handled, stored or disposed of, could subject us to penalties or other liabilities. We are also subject to regulations dealing with occupational health and safety. Although we maintain functional employee groups whose primary purpose is to ensure we implement effective health, safety, and environment work procedures throughout our organization, including construction sites and maintenance sites, the failure to comply with such regulations or procedures could subject us to a liability.

Risks Relating To Our Finances and Corporate Matters

We may not have sufficient cash flow or capital resources to fund capital expenditures of our business, and our access to liquidity through the capital markets may be limited.

Our business is capital-intensive. Expenditure levels for renewal and modernization of the system will grow at an increasing rate as components reach the end of their useful lives. In addition, EPA regulations impose maximum contaminant levels and monitoring requirements for the nation’s water systems for six PFAS chemicals under the SDWA and will require an increase in capital expenditures. We also will need to raise a significant amount of debt and equity capital to complete the pending transactions with Quadvest.

H2O America’s subsidiaries fund capital expenditures through a variety of sources, including cash received from operations, funds received from developers as contributions or advances, borrowings through lines of credit and debt financings, as well as equity financings by H2O America. We cannot provide any assurance that the historical sources of funds for capital expenditures will continue to be adequate or that the cost of funds will remain at levels permitting us to earn a reasonable rate of return. A significant change in any of the funding sources could impair the ability of Water Utility Services to fund its capital expenditures, which could impact our ability to grow our utility asset base and earnings. Any increase in the cost of capital through higher interest rates or otherwise could adversely affect our results of operations.

Our ability to raise capital through equity or debt may be affected by the economy and condition of the debt and equity markets. Disruptions in the capital and credit markets or deterioration in the strength of financial institutions could adversely affect H2O America’s ability to draw on its lines of credit, issue long-term debt or sell its equity. In addition, government policies, the state of the credit markets and other factors could result in increased interest rates, which would increase H2O America’s cost of capital. Furthermore, equity financings may result in dilution to our existing stockholders and debt financings may contain covenants that restrict the actions of H2O America and its subsidiaries.

25

Table of Contents

We have incurred substantial additional indebtedness that may reduce our business and operational flexibility and increase our borrowing costs.

We have incurred substantial indebtedness and plan to incur substantial indebtedness in the future, including to complete the transactions with Quadvest, resulting in a higher debt-to-equity ratio, which may have the effect, among other things, of:

•reducing our flexibility to respond to changing business, industry and economic conditions;

•increasing borrowing costs;

•limiting growth through capital expenditures and acquisitions;

•placing us at a competitive disadvantage relative to other companies in our industry with less debt;

•potentially having an adverse effect on our issuer and issue ratings;

•requiring additional cash flow to be used to service debt instead of for other purposes; and

•potentially impairing our ability to obtain other financing.

Under certain circumstances, we may not have sufficient funds or other resources to satisfy all of our obligations under our indebtedness, including principal and interest payments, which, if not cured, may cause an event of default. In addition, the terms and conditions of such indebtedness, including financial covenants and restrictive covenants, may reduce our business flexibility and adversely affect our business, financial condition, results of operations and prospects. The agreements governing the indebtedness contain covenants that impose significant operating and financial limitations and restrictions on us, including restrictions on the ability to enter particular transactions and engage in other activities that we may believe will be advisable or necessary for our business.

Our borrowings include certain financial covenants regarding a maximum debt to equity ratio and an interest coverage requirement for us and certain subsidiaries. In the event the relevant borrower exceeds the maximum debt to equity ratio or interest coverage requirement, we may be restricted from issuing future debt. Additionally, certain covenants include restrictions on cash dividends paid based on restricted net assets. Further, we have issued certain revenue bonds that contain affirmative and negative covenants customary for a loan agreement relating to revenue bonds, including, among other things, certain disclosure obligations, the tax exempt status of the interest on the bonds, and limitations and prohibitions on the transfer of projects funded by the loan proceeds and assignment of the loan agreement. Failure to comply with any of the covenants in our existing or future debt agreements could result in a default under those agreements and under other existing agreements containing cross-default provisions. A default would permit lenders to accelerate the maturity of indebtedness under these agreements, which would have an adverse effect on our business operations and financial condition.

H2O America has committed to certain “ring-fencing” measures which will enhance CTWS’s separateness from H2O America, which may limit H2O America’s ability to influence the management and policies of CTWS (beyond the limitations included in other existing governance mechanisms).

Pursuant to the agreements related to the acquisition of CTWS and commitments made by H2O America as part of the application for PURA and MPUC approval of the acquisition of CTWS, H2O America has instituted certain “ring-fencing” measures to enhance CTWS’s separateness from H2O America and to mitigate the risk that CTWS would be negatively impacted in the event of a bankruptcy or other adverse financial developments affecting H2O America or its non-ring-fenced affiliates. These commitments became effective upon the closing of the acquisition.

In order to satisfy the ring-fencing commitments, H2O America formed H2O America NE LLC a wholly owned special purpose entity (“SPE”), to own the capital stock of CTWS. The SPE, CTWS and its subsidiaries (collectively, the “CTWS Entities”) adopted certain measures designed to enhance their separateness from H2O America, with the intention of mitigating the effects on the CTWS Entities of any bankruptcy of H2O America and its affiliates other than the CTWS Entities (collectively, the “Non-CTWS Entities”). As a result of these ring-fencing measures, in certain situations, H2O America will be restricted in its ability to access assets of the CTWS Entities as dividends or intercompany loans to satisfy the debt or contractual obligations of any Non-CTWS Entity, including any indebtedness or other contractual obligations of H2O America. In addition, the ring-fencing structure may negatively impact H2O America’s ability to achieve certain benefits, including synergies and economies of scale to reduce operating costs of the combined entity, that it anticipates will result from the merger. This ring-fencing structure also subjects H2O America and the CTWS Entities to certain governance, operational and financial restrictions since the closing of the merger. Accordingly, H2O America may be restricted in its ability to direct the management, policies and operations of the CTWS Entities, including the deployment or disposition of their respective assets, declarations of dividends, strategic planning and other important corporate issues. Furthermore, the CTWS Entities’ directors have considerable autonomy and, as described in our commitments, have a duty to act in the best interest of the CTWS Entities consistent with the ring-fencing structure and applicable law, which may be contrary to H2O America’s best interests or be in

26

Table of Contents

opposition to H2O America’s preferred strategic direction for the CTWS Entities. To the extent they take actions that are not in H2O America’s interests, our financial condition, results of operations and prospects may be materially adversely affected.

Our business strategy, which includes acquiring water systems and expanding non-tariffed services, will expose us to new risks which could have a material adverse effect on our business.

Our business strategy focuses on the following:

•Regional regulated water utility operations (includes water and wastewater);

•Regional non-tariffed water utility related services provided in accordance with the guidelines established by the applicable state public utility commissions; and

•Out-of-region water and utility related services.

As part of our pursuit of the above three strategic areas, we consider from time-to-time opportunities to acquire businesses and assets. The proposed transactions with Quadvest are an example of this strategy. However, we cannot be certain we will be successful in identifying and consummating any strategic business combination or acquisitions relating to such opportunities. In addition, the execution of our business strategy will expose us to different risks than those associated with the current utility operations. We expect to incur costs in connection with the execution of this strategy and any integration of an acquired business could involve significant costs, the assumption of certain known and unknown liabilities related to the acquired assets, the diversion of management’s time and resources, the potential for a negative impact on H2O America’s financial position and operating results, entering markets in which H2O America has no or limited direct prior experience and the potential loss of key employees of any acquired company. Any strategic combination or acquisition we decide to undertake may also impact our ability to finance our business, affect our compliance with regulatory requirements, and impose additional burdens on our operations. Any businesses we acquire may not achieve sales, customer growth and projected profitability that would justify the investment. Any difficulties we encounter in the integration process, including the integration of controls necessary for internal control and financial reporting, could interfere with our operations, reduce our operating margins and adversely affect our internal controls. H2O America cannot be certain that any transaction will be successful or that it will not materially harm operating results or our financial condition.

An impairment in the carrying value of our goodwill could negatively impact our consolidated results of operations and financial condition.

We have significant amounts of goodwill resulting from the acquisition of businesses. As of December 31, 2025, consolidated goodwill totaled $640.3 million, or 12% of our total assets. Goodwill represents the excess of amounts paid for acquired businesses over the fair value of the net assets acquired. Goodwill is not amortized but is tested for impairment annually on October 1st or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. Such events or circumstances could include changes in performance relative to expected operating results, significant negative industry or economic trends, including rising interest rates, or a significant decline in our stock price and/or market capitalization for a sustained period of time. If certain factors arise, we may be required to record a significant charge to earnings in our consolidated financial statements during the period in which an impairment of our goodwill is determined. Any such charge could have a material adverse impact on our results of operations and financial condition.

Adverse investment returns and other factors may increase our pension costs and pension plan funding requirements.

A substantial number of our employees are covered by defined benefit pension plans. Our pension costs and the funded status of the plans are affected by a number of factors including the discount rate, applicable mortality tables, mortality rates of plan participants, investment returns on plan assets, and pension reform legislation. Any change in such factors could result in an increase in future pension costs and an increase in our pension liabilities, requiring an increase in plan contributions which may adversely affect our financial conditions and results of operations.

H2O America’s dividend policy is subject to the discretion of our board of directors and may be limited by legal and contractual requirements.

We anticipate continuing to pay a regular quarterly dividend, though any such determination to pay dividends will be at the discretion of our board of directors and will be dependent on then-existing conditions, including our financial condition, earnings, legal requirements, including limitations under Delaware law, restrictions in our credit agreements and other debt instruments that limit our ability to pay dividends to stockholders, and other factors the board of directors deems relevant. The board of directors of H2O America may, in its sole discretion, change the amount or frequency of dividends or discontinue the payment of dividends entirely.

27

Table of Contents

H2O America is a holding company that depends on cash flow from its subsidiaries to meet its financial obligations and pay dividends on its common stock.

As a holding company, we conduct substantially all of our operations through subsidiaries and our only significant assets are investments in those subsidiaries. This means that we are dependent on distributions of funds from our subsidiaries to meet H2O America’s debt service obligations and to pay dividends on our common stock. Our subsidiaries are separate and distinct legal entities and generally have no obligation to pay any amounts due on H2O America’s debt or to provide H2O America with funds for dividends. Our subsidiaries only pay dividends if and when declared by their respective boards of directors. Additionally, our subsidiaries may be subject to restrictions on their ability to pay dividends to us, including under state law, pursuant to regulatory commitments, and under their credit agreements and other debt instruments. In this regard, the CTWS Entities are limited from paying dividends to us in certain circumstances under PURA and MPUC regulatory commitments. Furthermore, our right to receive cash or other assets in the unlikely event of liquidation or reorganization of any of our subsidiaries is generally subject to the prior claims of creditors of that subsidiary. Any inability of our subsidiaries to pay us dividends may have a material and adverse effect on our ability to pay dividends to our stockholders, meet our financial obligations, or make additional investments.

Our charter documents and Delaware law could prevent a takeover that stockholders consider favorable and could also make it more difficult for stockholders to influence our policies or may reduce the rights of stockholders.

H2O America’s Certificate of Incorporation and Bylaws contain provisions that could delay or prevent a change in control of H2O America. These provisions could also make it more difficult for our stockholders to remove or replace directors or take other corporate actions. These provisions include, but are not limited to, the following:

•Authorizing the Board of Directors to issue “blank check” preferred stock;

•Prohibiting cumulative voting in the election of directors;

•Limiting the ability of stockholders to call a special meeting of stockholders to only stockholders holding not less than 20% of outstanding voting power; and

•Requiring advance notification of stockholder nomination of directors and proposals.

In addition, the provisions of Section 203 of the Delaware General Corporate Law (“DGCL”) govern H2O America. These provisions may prohibit large stockholders, in particular those owning 15% or more of our outstanding voting stock, from merging or combining with us for a certain period of time without the consent of the Board of Directors.

Furthermore, H2O America’s Certificate of Incorporation provides, unless the company consents in writing to the selection of an alternate forum, (a) a state or federal court located within the State of Delaware is the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of H2O America, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of H2O America to the company or its stockholders, (iii) any action asserting a claim arising pursuant to any provision of the DGCL, or (iv) any action asserting a claim governed by the internal affairs doctrine; and (b) the U.S. federal district courts is the sole and exclusive forum for any claim arising under the Securities Act of 1933 (unless such provision is deemed illegal, invalid or unenforceable, in which case the sole exclusive state court forum for any claim arising under the Securities Act of 1933 will be the Court of Chancery in the State of Delaware). Such “exclusive forum” provisions may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with H2O America or its directors, officers or other employees, which may discourage such lawsuits.

We may not be able to maintain adequate insurance coverage at reasonable costs, or at all, to cover all losses incurred in our operations.

We maintain insurance coverage as part of our overall legal and risk management strategy to minimize potential liabilities arising from our operations. Our insurance programs have varying coverage limits, deductibles, exclusions and maximums, and our insurance coverages include: worker’s compensation, employer’s liability, damage to our property, general liability, pollution liability, cybersecurity, and automobile liability. Each policy includes either deductibles or self-insured retentions and policy limits for covered claims. As a result, we may sustain losses that exceed or are excluded from our insurance coverage or for which we are self-insured. The insurance companies may also seek to challenge, reduce or deny any claims we submit, which may prevent us from recovering fully the losses we incurred. In addition, insurance companies may increase premiums or deductibles or reduce coverage limits based on factors that are beyond our control, including industry trends, financial conditions of insurance companies and catastrophic events such as wildfire, earthquake and pandemic. There can be no assurance that we can secure all necessary or appropriate insurance in the future, or that such insurance can be obtained at reasonable cost, or at all.

28

Table of Contents

General Risk Factors

We operate in areas subject to natural disasters, and we may be the target of terrorist activities and other physical threats.

We operate in areas that are prone to earthquakes, fires, floods, extreme weather and other natural disasters. A significant seismic event in northern California, where the majority of our operations are concentrated, or other natural disaster in northern California, Connecticut, Texas or Maine could adversely impact our ability to deliver water to our customers and our costs of operations. A major disaster could damage or destroy our capital assets, harm our reputations and adversely affect our results of operations. The Regulators have historically allowed utilities to establish catastrophic event memorandum accounts as a possible mechanism to recover costs, such as the CEMA memorandum account in California. However, we can give no assurance that our regulators, or any other commission, would allow any such cost recovery mechanism in the future.

In light of the potential threats to the nation’s health and security due to terrorist attacks, we have taken steps to increase security measures at our facilities and heighten employee awareness of threats to our water supply. We have also tightened our security measures regarding the delivery and handling of certain chemicals used in our business. In addition, because our operation requires us to interact extensively with the general public, we may be subject to complaints, threats and potentially violent actions by our customers or the public, which may disrupt our business activities and damage our reputation.

We have and will continue to bear increased costs for security precautions to protect our facilities, operations and supplies. These costs may be significant. While some of these costs are likely to be recovered in the form of higher rates, there can be no assurance that the Regulators will approve a rate increase to recover all or part of such costs and, as a result, our operating results and business may be adversely affected. Further, despite these tightened security measures, we may not be in a position to control the outcome of terrorist events should they occur.

Our operations, liquidity, and earnings may be adversely affected by wildfires and risk of fire hazards.

It is possible that wildfires and other fire hazards may occur more frequently, be of longer duration or impact larger areas as a result of drought-damaged plants and trees, lower humidity or higher winds that might be occurring as a result of changed weather patterns. The effects of these natural disasters in California’s drought-prone areas, such as the Santa Cruz Mountains, the watershed of which SJWC owns approximately 6,400 acres and where SJWC typically obtains approximately up to 10% of its water supply, may temporarily compromise its surface water supply resulting in disruption in our services and litigation which could adversely affect our business, operating results, and financial condition.

If our surface water supply is compromised, we may have to interrupt the use of that water supply until we are able to substitute the flow of water from an alternative water source.

In addition, we may incur significant costs in order to treat the impacted source through expansion of our current treatment facilities, or development of new treatment methods. If we are unable to substitute water supply from an alternative water source, or to adequately treat the impacted water source in a cost-effective manner, there may be an adverse effect on our revenues, operating results, and financial condition. The costs we incur to secure an alternative water source or an increase in draws from our underground water system could be significant and may not be recoverable in rates.

Wildfires may destroy or cause damage to properties, facilities, equipment and other assets owned and operated by SJWC or result in personal injuries to our employees and personnel, which may cause temporary or permanent disruption to our water services. In such a case, we may be required to incur significant expenses to repair, replace or upgrade our assets, or to defend against costly litigation or disputes with third parties, any of which may adversely affect our business operations or financial conditions.

While we maintain a business insurance policy, such policy includes limitation and retention that may reduce, or in some cases eliminate, our ability to recover all or a substantial portion of the losses and damages due to wildfire. Our inability to rely fully on insurance coverage may negatively impact our results of operations. Losses by insurance companies resulting from wildfires may also cause insurance coverage for wildfire risks to become more expensive or unavailable under reasonable terms, and our insurance may be inadequate to recover all our losses incurred in a wildfire. Furthermore, we might not be allowed to recover in our rates any increased costs of wildfire insurance or the costs of any uninsured wildfire losses.

The price of our common stock may be volatile and may be affected by market conditions beyond our control.

The trading price of our common stock may fluctuate in the future based on a variety of factors, many of which are beyond our control and unrelated to our financial results. Factors that could cause fluctuations in the trading price of our common stock include volatility of the general stock market or the utility index, regulatory developments, public announcement or market assumptions of material developments in strategic transactions, general economic conditions and trends, actual or anticipated changes or fluctuations in our results of operations, actual or anticipated changes in the expectations of investors or securities

29

Table of Contents

analysts, actual or anticipated developments in our competitors’ businesses or the competitive landscape generally, litigation involving us or our industry, and major catastrophic event(s) or sales of large blocks of our stock. Furthermore, we believe that stockholders invest in public stocks in part because they seek reliable dividend payments. If there is an oversupply of stock of public utilities in the market relative to demand by such investors, the trading price of our common stock may decrease. Additionally, if interest rates rise above the dividend yield offered by our common stock, demand for our stock and its trading price may also decrease.

We must continue to attract and retain qualified technical and managerial personnel in order to succeed.

Our future success depends substantially upon our ability to attract and retain highly skilled technical, operational and financial managers. There is significant competition for such personnel in our industry. Our ability to recruit and retain qualified personnel depends on many factors, including but are not limited to, our ability to provide competitive compensation and benefit packages, availability of talents in our industry, general workforce trends and macroeconomic conditions. The loss of the services of any member of our management team or the inability to hire and retain experienced management personnel could have an adverse effect on our business, as our management team has knowledge of our industry and customers and would be difficult to replace. We believe we offer competitive compensation and benefits as well as conduct succession planning and provide opportunities for continued development, and we continually strive to recruit and train qualified personnel and retain key employees. There can be no assurance, however, that we will continue to be successful in attracting and retaining the personnel we require to grow and operate profitably.

Item 1B.Unresolved Staff Comments

None.

Item 1C. Cybersecurity

Cybersecurity Risk Management and Strategy

We have taken critical steps to ensure the security and protection of our computer systems and networks. Our processes for assessment, identification and management of material risks from cybersecurity threats include routine monitoring of vulnerabilities, evaluations of new service providers, written policies for incident identification and management, and regular testing and assessment of our cybersecurity posture.

We have integrated cybersecurity risk management as part of our company-wide culture. The measures undertaken include, but are not limited to, monthly cybersecurity training for all employees and frequent communication to all employees on the importance of cybersecurity measures. We continue to advance our cybersecurity governance program and are evolving key practices to align with the National Institute of Standards and Technology (“NIST”) Cybersecurity Framework. These efforts include strengthening our risk assessment processes, control environment, and incident‐response capabilities.

We have engaged third-party experts to assist us in monitoring and managing our cybersecurity process. Furthermore, we monitor cybersecurity threats at certain of our third-party vendors on a regular basis.As of the date of this report, we are not aware of any material risks from cybersecurity threats that have materially affected or are reasonably likely to materially affect the company, including our business strategy, results of operations, or financial condition. We have discussed cybersecurity risks that may affect the company in Item 1A, “Risk Factors,” under the headings, “The necessity for ongoing physical and technological security has resulted, and may continue to result, in increased operating costs,” “Water Utility Services rely on information technology and systems that are key to business operations. A system malfunction, security breach, cyber-attacks or other disruption that compromises our information and expose us to liability and adversely affect business operations. In addition, noncompliance could expose us to liability and adversely affect business operations,” and “We may not be able to maintain adequate insurance coverage at reasonable costs, or at all, to cover all losses incurred in our operations.”

Cybersecurity Governance

We have implemented an internal risk assessment process that focuses on the principal risks that have been identified for us, including risks associated with our regulatory environment, business operations and continuity, compliance requirements, information technology and data storage and retrieval facilities, cyber risk, insurance coverage. The Audit Committee, pursuant to its charter, meets at least quarterly with senior leadership and other employees to discuss identified risks and the measures taken to control, manage and mitigate those risks, which include cyber and information security risk. On the basis of these meetings and discussions regarding such risks, the Chairman of the Audit Committee reports periodically to the full Board.The Vice President, Information Security Officer provides cybersecurity updates to the Audit Committee and other members of our senior management as appropriate at least quarterly. Our Vice President, Information Security Officer, and his team is responsible for leading enterprise-wide cybersecurity strategy, policy, standards, architecture, and processes, with the support of

30

Table of Contents

third-party experts.The Vice President, Information Security Officer has over 30 years of experience in information technology of which over 20 years is in cybersecurity, with industry experience in utilities, banking and e-commerce.

Item 2.Properties

The properties of SJWC consist of a unified water production system located in the County of Santa Clara in the State of California. In general, the property is comprised of franchise rights, water rights, necessary rights-of-way, approximately 6,400 acres of land held in fee (which is primarily non-developable watershed), impounding reservoirs with a capacity of approximately 2,256 million gallons, 2,481 miles of transmission and distribution mains, distribution storage of approximately 192 million gallons, wells, boosting facilities, diversions, surface water treatment plants, equipment, office buildings and other property necessary to provide water service to its customers.

SJWC maintains all of its properties in proper operating condition in accordance with customary practices for water utilities. SJWC’s groundwater pumping stations have a production capacity of approximately 261 million gallons per day and the present capacity for taking purchased water is approximately 84 million gallons per day. The surface water collection system has a physical delivery capacity of approximately 35 million gallons per day. During 2025, a maximum and average of 128 million gallons and 91 million gallons of water per day, respectively, were delivered to the system.

The properties of CTWS consist of land, easements, rights (including water rights), buildings, reservoirs with a capacity of approximately 9,400 million gallons, standpipes, dams, wells, supply lines, water treatment plants, pumping plants, 2,340 miles of transmission and distribution mains and other facilities and equipment used for the collection, purification, storage and distribution of water throughout Connecticut and Maine. In certain cases, CWC and MWC are or may be a party to limited contractual arrangements for the provision of water supply from neighboring utilities.

Source: SEC EDGAR (public domain) · 10-K for the period ended 2025-12-31, filed 2026-02-26 · accession 0001628280-26-012438

Filing HTML rendered to line-structured narrative text by the shipped reducer (datafeeds.edgar_fulltext.visible_text, keep_table_headers=True): scripts and inline-XBRL headers are dropped, and table content is reduced to its short label cells — numeric table data is not rendered and is therefore not counted. The same rendering is used for every year, so a year-over-year comparison is like for like.

The text is our rendering of the filing, not a facsimile: original pagination, typography and tables are not reproduced, and the numbers live in the financial statements (FA).

The outline locates item HEADINGS in this document. Only Items 1A and 7 have certified boundaries elsewhere in the terminal (the redline and the narrative-overlap number); every span here runs from one heading found to the next heading found.

How the outline was chosen. It is the longest chain of item headings that runs forward through both the document and the standard item order: 22 headings are on that chain and 17 further heading-shaped lines are not — the table-of-contents echo of every item, cross-references and exhibit-list mentions. Each entry's length is measured from its heading to the next heading on the chain.