17 insiders reported 67 Form 4 transactions for H2O AMERICA (HTO) over the past 18 months (most recent 2026-08-03). Recent activity: Mattern Megan (CAO, PAO and Controller) Sell 1,154 shares, ATLAS Infrastructure Partners (UK) Ltd. (10% Owner) Buy 2,784 shares, GIP ATLAS Holdings Ltd (10% Owner) Buy 2,784 shares, ATLAS Infrastructure Partners (UK) Ltd. (10% Owner) Buy 2,784 shares, GIP ATLAS Holdings Ltd (10% Owner) Buy 2,784 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-03 | Mattern Megan | CAO, PAO and Controller | Sell | 1,154 | $71,513 |
| 2026-07-13 | ATLAS Infrastructure Partners (UK) Ltd. | 10% Owner | Buy | 2,784 | $172,692 |
| 2026-07-13 | GIP ATLAS Holdings Ltd | 10% Owner | Buy | 2,784 | $172,692 |
| 2026-07-08 | ATLAS Infrastructure Partners (UK) Ltd. | 10% Owner | Buy | 2,784 | $172,692 |
| 2026-07-08 | GIP ATLAS Holdings Ltd | 10% Owner | Buy | 2,784 | $172,692 |
| 2026-07-06 | Walters Andrew F | Chief Executive Officer | Sell | 374 | $22,717 |
| 2026-07-06 | Kelly Ann P | CFO and Treasurer | Sell | 88 | $5,345 |
| 2026-07-02 | GIP ATLAS Holdings Ltd | 10% Owner | Sell | 1,686 | $102,399 |
| 2026-07-02 | ATLAS Infrastructure Partners (UK) Ltd. | 10% Owner | Sell | 1,686 | $102,399 |
| 2026-07-02 | ATLAS Infrastructure Partners (UK) Ltd. | 10% Owner | Buy | 2,132 | $129,535 |
| 2026-07-02 | GIP ATLAS Holdings Ltd | 10% Owner | Buy | 2,132 | $129,535 |
| 2026-06-05 | Walters Andrew F | Chief Executive Officer | Sell | 3,508 | $0 |
| 2026-06-02 | ATLAS Infrastructure Partners (UK) Ltd. | 10% Owner | Sell | 1,435 | $82,544 |
| 2026-06-02 | GIP ATLAS Holdings Ltd | 10% Owner | Sell | 1,435 | $82,544 |
| 2026-06-02 | ATLAS Infrastructure Partners (UK) Ltd. | 10% Owner | Buy | 31,001 | $1.8M |
| 2026-06-02 | GIP ATLAS Holdings Ltd | 10% Owner | Buy | 31,001 | $1.8M |
| 2026-05-15 | Rowe Nick Orlando | Director | Buy | 1,947 | $0 |
| 2026-05-15 | HANLEY MARY ANN | Director | Buy | 1,947 | $0 |
| 2026-05-15 | WALLACE CAROL P | Director | Buy | 1,947 | $0 |
| 2026-05-15 | Heather Hunt | Director | Buy | 1,947 | $0 |
| 2026-05-15 | KRUGER DENISE L | Director | Buy | 1,947 | $0 |
| 2026-05-15 | KLEIN REBECCA A | Director | Buy | 1,947 | $0 |
| 2026-05-15 | More Daniel B. | Director | Buy | 1,947 | $0 |
| 2026-05-15 | Guardino Carl | Director | Buy | 1,947 | $0 |
| 2026-04-22 | GIP ATLAS Holdings Ltd | 10% Owner | Buy | 50,385 | $3.0M |
Source: SEC Form 4 filings · as of 2026-08-03