{"transactions":[{"id":699503,"issuer":{"id":4308,"kind":"organization","name":"H2O AMERICA"},"owners":[{"id":27383,"kind":"person","name":"Mattern Megan","position":1,"cik":"0002079031","reported_name":"Mattern Megan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO, PAO and Controller"}}],"security":"Common Stock","published_at":"2026-08-03T23:06:59.000Z","date":"2026-07-30","kind":"tax_withholding","planned":false,"acquired":false,"shares":1154,"price":61.97,"value":71513.38,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents 1,154 shares of the issuer's common stock (Common Stock) withheld in satisfaction of applicable withholding taxes upon the vesting of certain shares of Common Stock that became issuable on July 30, 2026 pursuant to the terms of the Restricted Stock Unit Issuance Agreement between the reporting person and the issuer dated July 30, 2025. The shares underlying such restricted stock units (RSUs) were previously reported as Table I securities at the time the RSUs were granted. Accordingly, the issuance of such shares is not a reportable transaction on this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 3,052 shares of Common Stock and 10,579 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms."}],"balance_after":13631,"source":{"system":"sec-edgar","filing":"0002079031-26-000003","document":"wk-form4_1785798417.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/766829/000207903126000003/wk-form4_1785798417.xml","form_type":"4"}},{"id":872394,"issuer":{"id":4308,"kind":"organization","name":"H2O AMERICA"},"owners":[{"id":27383,"kind":"person","name":"Mattern Megan","position":1,"cik":"0002079031","reported_name":"Mattern Megan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO, PAO and Controller"}}],"security":"Common Stock","published_at":"2026-03-04T00:12:16.000Z","date":"2026-02-27","kind":"grant","planned":false,"acquired":true,"shares":2166,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents 2,166 shares of the issuer's common stock (\"Common Stock\") underlying restricted stock units (\"RSUs\") granted to the reporting person under the issuer's Long-Term Incentive Plan. Each RSU entitles the reporting person to receive one share of Common Stock upon vesting of the RSU. The RSUs will vest in three annual successive installments upon the completion of the reporting person's each year of service with the issuer for the three-year period measured from the date of grant, subject to accelerated vesting under certain prescribed circumstances."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 14,785 shares of the Common Stock underlying RSUs which will vest and become issuable in accordance with their terms."}],"balance_after":14785,"source":{"system":"sec-edgar","filing":"0001628280-26-014252","document":"wk-form4_1772583127.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/766829/000162828026014252/wk-form4_1772583127.xml","form_type":"4"}},{"id":1078775,"issuer":{"id":4308,"kind":"organization","name":"H2O AMERICA"},"owners":[{"id":27383,"kind":"person","name":"Mattern Megan","position":1,"cik":"0002079031","reported_name":"Mattern Megan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO, PAO and Controller"}}],"security":"Common Stock","published_at":"2025-07-31T22:47:03.000Z","date":"2025-07-30","kind":"grant","planned":false,"acquired":true,"shares":10263,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of the issuer's common stock (\"Common Stock\") underlying restricted stock units (\"RSUs\") granted to the reporting person under the issuer's Long-Term Incentive Plan. Each RSU entitles the reporting person to receive one share of Common Stock upon vesting of the RSU. The RSUs will vest in three annual successive installments upon the completion of the reporting person's each year of service with the issuer for the three-year period measured from the date of grant, subject to accelerated vesting under certain prescribed circumstances."}],"balance_after":12619,"source":{"system":"sec-edgar","filing":"0000766829-25-000084","document":"wk-form4_1754002019.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/766829/000076682925000084/wk-form4_1754002019.xml","form_type":"4"}},{"id":1078774,"issuer":{"id":4308,"kind":"organization","name":"H2O AMERICA"},"owners":[{"id":27383,"kind":"person","name":"Mattern Megan","position":1,"cik":"0002079031","reported_name":"Mattern Megan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO, PAO and Controller"}}],"security":"Common Stock","published_at":"2025-07-31T22:47:03.000Z","date":"2025-07-30","kind":"grant","planned":false,"acquired":true,"shares":2356,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of the issuer's common stock (\"Common Stock\") underlying restricted stock units (\"RSUs\") granted to the reporting person under the issuer's Long-Term Incentive Plan. Each RSU entitles the reporting person to receive one share of Common Stock upon vesting of the RSU. The RSUs will vest in three annual successive installments upon the completion of the reporting person's each year of service with the issuer for the three-year period measured from the date of grant, subject to accelerated vesting under certain prescribed circumstances."}],"balance_after":2356,"source":{"system":"sec-edgar","filing":"0000766829-25-000084","document":"wk-form4_1754002019.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/766829/000076682925000084/wk-form4_1754002019.xml","form_type":"4"}}]}