California Water Service Group (CWT)
Who owns California Water Service Group (CWT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.2% of the shares are freely tradable; institutional investors hold 94.7%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 17.22 | 10,308,555 | -3.5 | 03/31/2026 |
| Vanguard Group Inc | 12.27 | 7,346,457 | +0.5 | 12/31/2025 |
| Vanguard Portfolio Management, LLC | 7.17 | 4,289,673 | +0.0 | 03/31/2026 |
| Amundi | 5.80 | 3,470,997 | +26.7 | 03/31/2026 |
| T. Rowe Price Investment Management,Inc. | 5.71 | 3,418,294 | -15.8 | 03/31/2026 |
| State Street Corp | 5.18 | 3,102,659 | +2.4 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.45 | 2,665,225 | +0.0 | 03/31/2026 |
| Mariner Value Strategies, LLC | 2.68 | 1,603,748 | -12.1 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.03 | 3,611,991 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.18 | 1,903,912 | +0.5 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.