ATLAS Infrastructure discloses H2O AMERICA (HTO) 4.53M-share holding

Rhea-AI Filing Summary

ATLAS Infrastructure Partners (UK) Ltd. filed an initial ownership report on H2O AMERICA. The filing shows direct ownership of 4,532,084 shares of H2O AMERICA common stock, identifying ATLAS as a ten percent owner. This Form 3 records holdings rather than any recent share purchases or sales.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider ATLAS Infrastructure Partners (UK) Ltd.

Role 10% Owner

Type	Security	Shares	Price	Value
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 4,532,084 shares (Direct)

Footnotes (1)

Key Figures

Common shares held: 4,532,084 shares

1 metrics

Common shares held 4,532,084 shares Direct ownership after reported date

Key Terms

Form 3, ten percent owner, Common Stock

3 terms

Form 3 regulatory

"ATLAS Infrastructure Partners (UK) Ltd. filed an initial ownership report on H2O AMERICA."

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

ten percent owner regulatory

"identifying ATLAS as a ten percent owner."

Common Stock financial

"direct ownership of 4,532,084 shares of H2O AMERICA common stock"

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.

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
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hours per response:			0.5

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. Date of Event Requiring Statement (Month/Day/Year)
03/04/2026

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

3a. Foreign Trading Symbol

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

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

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

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

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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	4,532,084	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Clinton Joyner	04/08/2026
	** 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 5 (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 3: SEC 1473 (03-26)

FAQ

What does ATLAS Infrastructure's Form 3 filing for HTO show?

The Form 3 shows ATLAS Infrastructure Partners (UK) Ltd. directly holding 4,532,084 shares of H2O AMERICA common stock. This establishes ATLAS as a ten percent owner and records its initial ownership position without detailing recent trades or price information.

How many H2O AMERICA (HTO) shares does ATLAS Infrastructure own?

ATLAS Infrastructure Partners (UK) Ltd. reports ownership of 4,532,084 H2O AMERICA common shares. This figure reflects its direct holdings after the reported date and is used to classify the firm as a ten percent owner in regulatory terms.

Does the H2O AMERICA (HTO) Form 3 disclose any insider buying or selling?

The Form 3 for H2O AMERICA does not disclose specific insider buying or selling transactions. It instead records ATLAS Infrastructure Partners (UK) Ltd.’s existing direct holding of 4,532,084 common shares as of the reporting date, serving as a baseline ownership statement.

Who is the reporting person in H2O AMERICA’s (HTO) Form 3 filing?

The reporting person is ATLAS Infrastructure Partners (UK) Ltd., identified as a ten percent owner of H2O AMERICA. The entity reports direct ownership of 4,532,084 common shares, fulfilling its obligation to disclose significant holdings under insider reporting rules.

What type of security is reported in the HTO Form 3 by ATLAS Infrastructure?

The Form 3 filed by ATLAS Infrastructure Partners (UK) Ltd. reports holdings in H2O AMERICA’s common stock. It lists a direct position of 4,532,084 shares, documenting the class of security and share count for regulatory disclosure of significant ownership.