Beneficial Ownership Report · SCHEDULE 13G/A
H2O America
HTONASDAQEQUITYCurrent
Beneficial Ownership Report
Structured filing — SCHEDULE 13G/A
primary_doc.xml
Amendment · This filing reports the amendment as submitted.
Subject company
- Company
- H2O America
- Company CIK
- 0000766829
- Street
- 110 West Taylor Street
- City
- San Jose
- State / country code
- CA
- Postal code
- 95110
Statement details
- Amendment number
- 3
- Security class
- Common Stock, par value $0.001 per share
- Event date
- 09/21/2026
- Rule designation
- Rule 13d-1(b)
Reporting person 1
- Name
- ATLAS Infrastructure Partners (UK) Ltd.
- Citizenship / organization
- X0
- Reporting person type
- IA
- Aggregate amount owned
- 4,675,469.00
- Percent of class
- 11.17
- Sole voting power
- 0.00
- Shared voting power
- 4,675,469.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 4,675,469.00
- Aggregate excludes certain shares
- N
- Comments
- The percentages used in this Schedule 13G are calculated based upon 41,856,804 Common Stock outstanding as of July 24, 2026, as reported in the Company's Report on Form 10-Q for the period ended June 30, 2026, filed with the Securities and Exchange Commission on July 28, 2026. This amendment is being filed to correct the filer's designation under Rule 13d-1 in the original Schedule 13G filed on March 10, 2026, and Amendment No. 1 thereto filed on April 8, 2026 (together, the "Prior Filing"). The Prior Filing incorrectly selected Rule 13d-1(c) instead of Rule 13d-1(b).
Reporting person 2
- Name
- GIP Atlas Holdings Limited
- Citizenship / organization
- X0
- Reporting person type
- IA
- Aggregate amount owned
- 4,675,469.00
- Percent of class
- 11.17
- Sole voting power
- 0.00
- Shared voting power
- 4,675,469.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 4,675,469.00
- Aggregate excludes certain shares
- N
- Comments
- The percentages used in this Schedule 13G are calculated based upon 41,856,804 Common Stock outstanding as of July 24, 2026, as reported in the Company's Report on Form 10-Q for the period ended June 30, 2026, filed with the Securities and Exchange Commission on July 28, 2026. 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. This amendment is being filed to correct the filer's designation under Rule 13d-1 in the original Schedule 13G filed on March 10, 2026, and Amendment No. 1 thereto filed on April 8, 2026 (together, the "Prior Filing"). The Prior Filing incorrectly selected Rule 13d-1(c) instead of Rule 13d-1(b).
Item 1
Issuer
H2O America
Principal executive office address
110 West Taylor Street, San Jose, CA, 95110
Item 2
Citizenship
United Kingdom
Filing person
ATLAS Infrastructure Partners (UK) Ltd. GIP Atlas Holdings Limited
Principal business or residence address
1ST Floor West, 1-3 College Hill, London, EC4R 2RA
Item 3
Not applicable indication
N
Type of filing person
IA
Item 4
Percent of class
11.17
Amount beneficially owned
4,675,469
Sole voting power
0
Shared voting power
4,675,469
Sole dispositive power
0
Shared dispositive power
4,675,469
Item 5
Not applicable indication
Y
Item 6
Not applicable indication
Y
Item 7
Not applicable indication
Y
Item 8
Not applicable indication
Y
Item 9
Not applicable indication
Y
Item 10
Not applicable indication
N
Certifications
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
Signature 1
- Reporting person
- ATLAS Infrastructure Partners (UK) Ltd.
- Signed
- Clinton Joyner
- Title
- Partner and COO
- Date
- 09/22/2026
Signature 2
- Reporting person
- GIP Atlas Holdings Limited
- Signed
- Clinton Joyner
- Title
- Partner and COO
- Date
- 09/22/2026
Company context
H2O America (NASDAQ: HTO) is a national investor-owned network of local water and wastewater utilities united by one purpose: delivering clean, high-quality water to the communities we call home. For H2O America, providing water is more than a responsibility - it’s a privilege. Every connection we serve helps sustain what matters most: public health, vibrant neighborhoods, and a reliable future. Across approximately 409,000 water and wastewater service connections, we invest in critical infrastructure to strengthen water supply for generations to come. We stay actively engaged in our local communities while focusing on operational excellence and delivering sustainable, long-term value to our investors.
Current securities
Historical securities (1)
Recent company filings
- Completion of Acquisition or Disposition of Assets · Regulation FD DisclosureOct 1, 2026
- SCHEDULE 13G/A - filed by ATLAS Infrastructure Partners (UK) Ltd. regarding H2O AMERICAAug 19, 2026
- SCHEDULE 13G/A - filed by BlackRock, Inc. regarding H2O AMERICAJul 28, 2026
- 10-Q filingJul 28, 2026
- Results of Operations and Financial ConditionJul 27, 2026