H2O America
HTO- Exchange
- Nasdaq
- Industry
- Water Supply
- SEC CIK
- 0000766829
In the last 90 days, H2O America insiders filed 2 open-market purchases and 1 sale; 315 institutions reported holding it in 13F filings for Q2 2026, worth $2.68B in total; Soros Fund Management is the only superinvestor holding it.
Holders of 5% or more of HTO
Holders whose latest Schedule 13D or 13G filing reports 5% or more of H2O America, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 14.40%6.03M shares | −2.30 ppfrom 16.70% | Feb 5, 20253 filings | Apr 27, 2026 | SEC |
| ATLAS Infrastructure Partners (UK) Ltd. | 13G/A | 11.17%4.68M shares | +0.14 ppfrom 11.03% | Mar 10, 20264 filings | Sep 22, 2026 | SEC |
| Future Fund Board of Guardians | 13G | 6.20%2.60M shares | New | Mar 6, 20261 filing | Mar 6, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
14 Schedule 13D and 13G filings on H2O America, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Sep 22, 20266:43 PM ET | ATLAS Infrastructure Partners (UK) Ltd.and 1 other | 13G/A | 11.17%4.68M shares | +0.14 ppfrom 11.03% | Sep 21, 2026 | SEC |
| Aug 19, 202611:58 AM ET | ATLAS Infrastructure Partners (UK) Ltd.and 1 other | 13G/A | 11.03%4.62M shares | +0.20 ppfrom 10.83% | Mar 4, 2026 | SEC |
| Apr 27, 20264:12 PM ET | BlackRock, Inc. | 13G/A | 14.40%6.03M shares | −2.30 ppfrom 16.70% | Mar 31, 2026 | SEC |
| Apr 8, 20261:19 PM ET | ATLAS Infrastructure Partners (UK) Ltd.and 1 other | 13G/A | 10.83%4.53M shares | −0.01 ppfrom 10.84% | Mar 4, 2026 | SEC |
| Mar 27, 20269:35 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Mar 10, 20261:11 PM ET | ATLAS Infrastructure Partners (UK) Ltd. | 13G | 10.84%4.53M shares | New | Mar 4, 2026 | SEC |
| Mar 6, 20268:57 PM ET | Future Fund Board of Guardians | 13G | 6.20%2.60M shares | New | Mar 3, 2026 | SEC |
| Feb 17, 20264:55 PM ET | Amundiand 1 other | 13G/A | 4.78%1.71M shares | −1.41 ppfrom 6.19%Below 5% | Dec 31, 2025 | SEC |
| Nov 14, 20255:30 PM ET | Amundiand 1 other | 13G/A | 6.19%2.18M shares | +0.34 ppfrom 5.85% | Sep 30, 2025 | SEC |
| Aug 13, 20254:38 PM ET | Amundiand 1 other | 13G | 5.85%2.00M shares | New | Jun 30, 2025 | SEC |
| May 13, 202512:16 PM ET | State Street Corp | 13G | 4.00%1.35M shares | −1.40 ppfrom 5.40%Below 5% | Mar 31, 2025 | SEC |
| Apr 17, 20259:35 AM ET | BlackRock, Inc. | 13G/A | 16.70%5.62M shares | −2.30 ppfrom 19.00% | Mar 31, 2025 | SEC |
| Feb 5, 20251:23 PM ET | BlackRock, Inc. | 13G/A | 19.00%6.32M shares | – | Dec 31, 2024 | SEC |
| Feb 5, 20256:35 AM ET | State Street Corp | 13G | 5.40%1.81M shares | New | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell H2O America shares.
No Form 144 notices for H2O America are on file.