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# Who owns CALIFORNIA WATER SERVICE GROUP (CWT)? Elite investor 13F holders

1 tracked elite investors reported holding CALIFORNIA WATER SERVICE GROUP as of 2026-06-30, including GAMCO. Who bought, trimmed or exited each quarter, with links to the original SEC 13F filings.

1 tracked investors currently reported holding · Latest report period: 2026-06-30 · Utilities · Utilities

California Water Service Group, through its subsidiaries, provides water utility and other related services in California, Washington, New Mexico, Hawaii, and Texas. It is involved in the production, purchase, storage, treatment, testing, distribution, and sale of water for domestic, industrial, public, and irrigation uses, as well as for fire protection services. The company offers its services…

## Reported holders and securities, including exits (up to 20)

| Investor | Security | Instrument | Report period | Filed | Value | Quantity | Units | Change | Source |
|  --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| [Renaissance Technologies LLC](https://ownershiptrace.com/13f/investors/63) | CALIFORNIA WTR SVC GROUP | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/1037389/0001037389-26-000059-index.html) |
| [D.E. Shaw](https://ownershiptrace.com/13f/investors/98) | CALIFORNIA WTR SVC GROUP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/1009207/0001104659-26-097217-index.html) |
| [GAMCO](https://ownershiptrace.com/13f/investors/137) | CALIFORNIA WTR SVC GROUP | SHARE | 2026-06-30 | 2026-08-12 00:00:00 | 732085.00 USD | 15048.000000 | Shares | buy | [Original filing](https://www.sec.gov/Archives/edgar/data/807249/0001140361-26-032508-index.html) |
| [Bridgewater Associates](https://ownershiptrace.com/13f/investors/8) | CALIFORNIA WTR SVC GROUP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/1350694/0001350694-26-000003-index.html) |

Public disclosures can be delayed, incomplete, or amended. Report period describes a position date; transaction date describes a reported transaction; filed describes submission. A recent filing or page update does not establish a current holding. A dash means unavailable or not comparable, not zero.

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