SEC Form 4/A · accession 0001924953-26-000008

H2O AMERICA · HTO

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

A later amendment supersedes this filing — read the amendment. The figures below are kept as originally reported (version chain, not an overwrite).

This is an amendment (Form 4/A). It replaces an earlier filing for the same period.

Reporting owners

ATLAS Infrastructure Partners (UK) Ltd.

10% Owner

GIP ATLAS Holdings Ltd

10% Owner

Period of report

Jul 7, 2026

Accepted (ET)

Jul 13, 2026 · 12:02 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0000766829

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock	Jul 7, 2026	P	2,784	$62.03	A	4,615,265	D

Table II — derivative securities

No Table II lines on this filing.

Remarks

1. GIP Atlas Holdings Limited is the sole owner of Atlas Infrastructure Partners (UK) Ltd, holding 100% of its equity interests; however, it does not exercise investment discretion with respect to the entity. 2. The securities reported herein are held for the accounts of various underlying clients and investment funds managed and/or advised by the Reporting Person. The Reporting Person may be deemed to beneficially own such securities by virtue of its investment discretion and/or voting authority over such accounts. The filing does not reflect beneficial ownership of the securities by the Reporting Person for its own account.