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Equity Plans | 6 Months Ended
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Jun. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Equity Plans | Equity Plans H2O America’s long-term incentive plans provide employees, non-employee board members or the board of directors of any parent or subsidiary, consultants, and other independent advisors who provide services to the company or subsidiary the opportunity to acquire an equity interest in H2O America. H2O America also maintains stock plans in connection with its acquisition of CTWS which are no longer granting new stock awards. In addition, shares are issued to employees under H2O America’s employee stock purchase plan (“ESPP”). As of June 30, 2025, 230,275 shares are issuable upon the vesting of outstanding restricted stock units and deferred restricted stock units and an additional 913,976 shares are available for award issuances under the long-term incentive plans. A summary of compensation costs charged to income, by award type, and proceeds from the ESPP, are presented below for the three and six months ended June 30, 2025 and 2024:
| Three months ended June 30, |  | Six months ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Compensation costs charged to income: |  |  |  |  |  |  |
ESPP | $ | 100 |  |  | — |  |  | $ | 189 |  |  | 195 |
Restricted stock and deferred restricted stock | 1,364 |  |  | 1,275 |  |  | 2,485 |  |  | 2,618 |
Total compensation costs charged to income | $ | 1,464 |  |  | 1,275 |  |  | $ | 2,674 |  |  | 2,813 |
ESPP proceeds | $ | — |  |  | — |  |  | $ | 1,116 |  |  | 1,101 |
Restricted Stock and Deferred Restricted Stock For the three months ended June 30, 2025 and 2024, H2O America granted 19,909 and 24,692, respectively, of one year and three-year service-based restricted stock awards with a weighted average grant date fair value per unit of $48.57 and $50.04, respectively. For the six months ended June 30, 2025 and 2024, H2O America granted 66,314 and 64,482, respectively, of one-year and three-year service-based restricted stock awards with a weighted average grant date fair value per unit of $45.49 and $58.39, respectively. For the three months ended June 30, 2025 and 2024, H2O America granted 1,562 and 356 target units, respectively, of performance-based and market-based restricted stock awards with a weighted-average grant date fair value per unit of $53.19 and $52.90, respectively. For the six months ended June 30, 2025 and 2024, H2O America granted 58,208 and 45,763 target units, respectively, of performance-based and market-based restricted stock awards with a weighted average grant date fair value per unit of $51.91 and $55.60, respectively. Based upon actual attainment relative to the target performance metric, the number of shares issuable can range between 0% to 150% of the target number of shares for performance-based restricted stock awards, or between 0% and 200% of the target number of shares for market-based restricted stock awards. As of June 30, 2025, the total unrecognized compensation costs related to restricted and deferred restricted stock plans was $8,405. This cost is expected to be recognized over a weighted average period of 1.93 years.

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- Definition The entire disclosure for shareholders' equity and share-based payment arrangement. Includes, but is not limited to, disclosure of policy and terms of share-based payment arrangement, deferred compensation arrangement, and employee stock purchase plan (ESPP). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/718/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/505/tableOfContent + Details
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