What does CUSIP 784305104 represent in this 13F holders report?

CUSIP 784305104 is the security identifier for HTO - H2O AMERICA - Common Stock, par value $0.001 per share used to aggregate holder disclosures.

How many institutions held HTO - H2O AMERICA - Common Stock, par value $0.001 per share in Q1 2026?

313 institutional investors reported HTO - H2O AMERICA - Common Stock, par value $0.001 per share for Q1 2026. Use the holders table for investor-level position and value details.

H2O AMERICA - Common Stock, par value $0.001 per share (HTO)

CUSIP: 784305104

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Stock, par value $0.001 per share
Total 13F shares: 44,740,624
Total 13F value: $2,624,612,379
Share change: +14,412,232
Put/Call ratio: 283%
SEC-reported price per share: $58.67
Number of holders: 313
Value change: +$852,279,377
Number of buys: 203
Number of sells: 93
Shares outstanding: 41,857,377

Security key

784305104

Report period

Q1 2026

Institutions

313

Top holders

HTO full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 H2O AMERICA SEC filings H2O AMERICA company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 784305104

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of HTO - H2O AMERICA - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

ATLAS Infrastructure Part...

Disclosed value leader

BlackRock, Inc.

Comparable rows

4/15

Latest evidence

03 Mar 2026

13F 13D/G 3/4/5 Lead comparable stake: 11% 11 rows are not safely comparable across share classes. 13D/G row: ATLAS Infrastructure Partners (UK) Ltd. Showing 1-6 of 15 holder rows.

Quick read

ATLAS Infrastructure Partners (UK) Ltd. leads the comparable SEC ownership view at 11%.

4 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens ATLAS Infrastructure Partners (UK) Ltd.'s linked filing trail.

Comparable ownership Top 4

ATLAS Infrastructure Partners (UK... 11%

Future Fund Board of Guardians 6.2%

Amundi 4.8%

STATE STREET CORP 4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
ATLAS Infrastructure Partners (UK) Ltd.	13F 13D/G Company 13F 13D/G	11% Reported 13D/G · 04 Mar 2026	$28,614,079 584,080 shares	—	31 Dec 2025
Future Fund Board of Guardians	13D/G 13D/G	6.2% Reported 13D/G · 03 Mar 2026	— 2,603,878 shares	$0	03 Mar 2026
Amundi	13F 13D/G Individual 13F 13D/G	4.8% Reported 13D/G · 31 Dec 2025	$83,936,749 1,712,886 shares	—	31 Dec 2025
STATE STREET CORP	13D/G 13F STATE STREET CORPORATION · Company 13D/G 13F	4% Reported 13D/G · 31 Mar 2025	$73,260,965 1,347,452 shares	-$25,246,166	31 Mar 2025
Robert A. van Valer	3/4/5 Former 10% Owner 3/4/5	— denominator unverified	$6,077,172 94,410 shares	—	01 Feb 2023
BlackRock, Inc.	13F Company 13F	— denominator unverified	$326,037,275 6,655,180 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

313

44,740,624

Rows available

313

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

313

Q1 2026 holders

313

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend