(Mark One) ☒Quarterly report pursuant to Section13 or 15(d)of the Securities Exchange Act of 1934for the quarterly period ended June30, 2026or☐Transition report pursuant to Section13 or 15(d)of the Securities Exchange Act of 1934for the transition period fromtoCommission file number001-14431American States Water Company(Exact Name of Registrant as Specified in Its Charter)California95-4676679(State or Other Jurisdiction of Incorporation or Organization)(IRS Employer Identification No.)630 E. Foothill BlvdSan DimasCA91773-1212(Address of Principal Executive Offices)(Zip Code)(909) 394-3600(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 Securities Exchange Act of 1934:Title of each classTrading symbolName of each exchange on which registeredCommon sharesAWRNew York Stock ExchangeCommission file number001-12008 Golden State Water Company California95-1243678(State or Other Jurisdiction of Incorporation or Organization)(IRS Employer Identification No.)630 E. Foothill BlvdSan DimasCA91773-1212(Address of Principal Executive Offices)(Zip Code)(909) 394-3600(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 Securities Exchange Act of 1934: Indicate by check mark whether Registrant (1)has filed all reports required to be filed by Section13 or 15(d)of the Securities Exchange Act of1934 during the preceding 12 months (or for such shorter period that Registrant was required to file such reports), and (2)has been subject tosuch filing requirements for the past 90 days. American States Water CompanyYesNoGolden State Water CompanyYesNo Indicate by check mark whether Registrant has submitted electronically every Interactive Data File required to be submitted pursuant toRule405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or such shorter period that the Registrant was requiredto submit such files). Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reportingcompany, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,”and “emerging growth company” in Rule12b-2 of the Exchange Act. (Check one): American States Water Company Golden State Water Company If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complyingwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Indicate by check mark whether Registrant is a shell company (as defined in Rule12b-2 of the Exchange Act) American States Water CompanyYes☐NoGolden State Water CompanyYes☐No As of August4, 2026, the number of common shares, no par value (“Common Shares”) outstanding of American States Water Company was39,635,626. As of August4, 2026, all of the 178.3836 outstanding shares of common stock, no par value, of Golden State Water Company wereowned by American States Water Company. Golden State Water Company meets the conditions set forth in General Instruction (H)(1)(a)and (b)of Form10-Q and is therefore filing thisForm, in part, with the reduced disclosure format for Golden State Water Company. AMERICAN STATES WATER COMPANYandGOLDEN STATE WATER COMPANYFORM10-Q INDEX Glossary of TermsInformation Regarding Forward-Looking Statements Item 1:Financial StatementsConsolidated Balance Sheets of American States Water Company as of June 30, 2026 and December 31, 2025Consolidated Statements of Income of American States Water Company for the Three and Six Months EndedJune 30, 2026 and 2025Consolidated Statements of Changes in Common Shareholders' Equity of American States Water Company forthe Six Months Ended June 30, 2026Consolidated Statements of Changes in Common Shareholders' Equity of American States Water Company forthe Six Months Ended June 30, 2025Consolidated Statements of Cash Flows of American States Water Company for the Six Months Ended June 30,2026 and 2025Balance Sheets of Golden State Water Company as of June 30, 2026 and December31, 2025Statements of Income of Golden State Water Company for the Three and Six Months Ended June 30, 2026 and2025Statements of Changes in Common Shareholder's Equity of Golden State Water Company for the Six MonthsEnded June 30, 2026Statements of Changes in Common Shareholder's Equity of Golden State Water Company for the Six MonthsEnded June 30, 2025Statements of Cash Flows of Golden State Water Company for the Six Months Ended June 30, 2026 and 2025Notes to Consolidated Financial StatementsItem 2:Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem 3:Qua