Form4insider filings, from the source

Company · CIK 0000766829 · SIC 4941 — Water Supply · Nasdaq

H2O AMERICA · HTO

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jul 30, 2026 FForm 4 →Aug 3, 7:06 pm EDTMegan MatternCAO, PAO and Controller1,154$61.97$71,51313,631—
Jul 7, 2026 PForm 4/A →Jul 13, 12:02 pm EDTATLAS Infrastructure Partners (UK) Ltd. +110% Owner2,784$62.03$172,6924,615,265+0.06% amended
Jul 7, 2026 PForm 4 →Jul 8, 11:40 am EDTATLAS Infrastructure Partners (UK) Ltd. +110% Owner2,784$62.03$172,6924,615,265+0.06% amended
Jul 1, 2026 DForm 4 →Jul 6, 5:10 pm EDTAndrew F WaltersChief Executive Officer, Director374$60.74$22,71726,461—
Jul 1, 2026 FForm 4 →Jul 6, 3:13 pm EDTAnn P KellyCFO and Treasurer88$60.74$5,3459,976—
Jul 1, 2026 PForm 4 →Jul 2, 4:58 pm EDTATLAS Infrastructure Partners (UK) Ltd. +110% Owner2,132$60.76$129,5354,612,481+0.05% amended
Jul 1, 2026 SForm 4 →Jul 2, 4:58 pm EDTATLAS Infrastructure Partners (UK) Ltd. +110% Owner1,686$60.73$102,3994,610,349−0.04% amended
Jun 5, 2026 GForm 4 →Jun 5, 8:51 pm EDTAndrew F WaltersChief Executive Officer, Director3,508——26,835—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jun 2, 2026 AForm 4 →Jun 3, 5:02 pm EDTA Kristen JohnsonChief Administrative Officer———18,160—