H2O America (HTO) major holder makes mixed buy and sell trades

Rhea-AI Filing Summary

H2O America ten percent owner ATLAS Infrastructure Partners (UK) Ltd. reported mixed open-market trades in Common Stock. It bought 2,132 shares at about $60.76 per share and sold 1,686 shares at about $60.74 per share, resulting in a small net increase in its direct holdings to 4,610,349 shares.

Insider Trade Summary

Net Buyer: 446 shares ($129,535)

Net Buy 2 txns

Insider ATLAS Infrastructure Partners (UK) Ltd., GIP ATLAS Holdings Ltd

Role null | null

Bought 2,132 shs ($130K)

Sold 1,686 shs ($102K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,686	$60.735	$102K
Purchase	Common Stock	2,132	$60.7573	$130K

Holdings After Transaction: Common Stock — 4,610,349 shares (Direct, null)

Footnotes (1)

Key Figures

Shares purchased: 2,132 shares Purchase price: $60.7573 per share Shares sold: 1,686 shares +4 more

7 metrics

Shares purchased 2,132 shares Open-market purchase of Common Stock

Purchase price $60.7573 per share Price paid for 2,132-share buy

Shares sold 1,686 shares Open-market sale of Common Stock

Sale price $60.7350 per share Price received for 1,686-share sale

Net share change 446 shares Net buy-sell shares from transactions

Shares after purchase 4,612,481 shares Holdings following the buy transaction

Final holdings 4,610,349 shares Directly held after both buy and sell

Key Terms

open-market purchase, open-market sale, ten percent owner, Common Stock

4 terms

open-market purchase financial

"transaction_action: "open-market purchase" for the 2,132-share buy"

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

open-market sale financial

"transaction_action: "open-market sale" for the 1,686-share sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

ten percent owner financial

"GIP ATLAS Holdings Ltd is indicated as a ten percent owner"

Common Stock financial

"security_title is listed as "Common Stock" for both transactions"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/02/2026 - 04:59 PM Accepted by SEC EDGAR 07/02/2026 - 04:58 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

ATLAS Infrastructure Partners (UK) Ltd.

(Last) (First) (Middle)

1ST FLOOR WEST

1-3 COLLEGE HILL

(Street)

LONDON EC4R 2RA

(City) (State) (Zip)

UNITED KINGDOM

(Country)

2. Issuer Name and Ticker or Trading Symbol
H2O AMERICA [ HTO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/01/2026		S		1,686	D	$60.735	4,610,349	D
Common Stock	07/01/2026		P		2,132	A	$60.7573	4,612,481	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

ATLAS Infrastructure Partners (UK) Ltd.

(Last) (First) (Middle)

1ST FLOOR WEST

1-3 COLLEGE HILL

(Street)

LONDON EC4R 2RA

(City) (State) (Zip)

UNITED KINGDOM

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

GIP ATLAS Holdings Ltd

(Last) (First) (Middle)

1ST FLOOR WEST, 1-3 COLLEGE HILL

(Street)

LONDON EC4R 2RA

(City) (State) (Zip)

UNITED KINGDOM

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

Remarks:

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.

	/s/ Toni Rizk	07/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did H2O America (HTO) report in this Form 4?

H2O America reported that a ten percent owner executed both an open-market purchase and an open-market sale of Common Stock on the same date, resulting in a small net increase in directly held shares.

How many H2O America (HTO) shares were bought and sold in the latest insider trades?

The reporting holder bought 2,132 shares of H2O America Common Stock and sold 1,686 shares. These trades produced a modest net share increase while keeping the overall ownership position largely unchanged.

What prices were paid and received in the H2O America (HTO) insider trades?

The insider purchase occurred at an average price of about $60.76 per share, while the sale occurred at about $60.74 per share. Both transactions were reported as open-market trades in Common Stock.

What is the reporting holder’s total H2O America (HTO) position after these transactions?

After the reported trades, the ten percent owner directly holds 4,610,349 H2O America Common Stock shares. This reflects a small net increase in shares following the same-day purchase and sale activity.

Who is the reporting person in the recent H2O America (HTO) Form 4 filing?

The filing lists ATLAS Infrastructure Partners (UK) Ltd. and GIP ATLAS Holdings Ltd as ten percent owners of H2O America. The reported transactions involve Common Stock held with direct ownership.