Who owns California Water Service Group?
Institutional ownership of CWT from SEC Form 13F filings across 242 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
242
13F holders
$1.93B
value, 2026 filers
65.6%
of shares outstanding (40.6M sh)
35
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of CWT's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 10.8M | $523.3M | 0.0% | 17.4% | +4.3% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 4.4M | $213.1M | 0.0% | 7.1% | +2.1% |
| 3 | Amundi | 3.5M | $169.7M | 0.0% | 5.6% | +0.5% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2.7M | $130.9M | 0.0% | 4.4% | -49.5% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 1.6M | $75.7M | 0.0% | 2.5% | +5.4% |
| 6 | FIRST TRUST ADVISORS LP | 1.3M | $63.2M | 0.0% | 2.1% | -4.0% |
| 7 | FMR LLC | 1.3M | $62.3M | 0.0% | 2.1% | -7.8% |
| 8 | Invesco Ltd. | 974,775 | $47.4M | 0.0% | 1.6% | -2.7% |
| 9 | MORGAN STANLEY | 948,112 | $46.1M | 0.0% | 1.5% | -15.2% |
| 10 | Legal & General Group Plc | 807,510 | $39.3M | 0.0% | 1.3% | +3.9% |
| 11 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC.NEW | 747,216 | $36.4M | 0.1% | 1.2% | new |
| 12 | Sixth Street Partners Management Company, L.P.NEW | 725,290 | $35.3M | 6.1% | 1.2% | new |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 725,290 | $35.3M | 0.0% | 1.2% | -0.4% |
| 14 | NORTHERN TRUST CORP | 708,763 | $34.5M | 0.0% | 1.1% | +11.2% |
| 15 | KBC Group NV | 577,247 | $28,083 | 0.1% | 0.9% | 0.0% |
| 16 | Bank of New York Mellon Corp | 527,076 | $25.6M | 0.0% | 0.9% | +4.0% |
| 17 | Beck Bode, LLC | 426,692 | $20.8M | 3.1% | 0.7% | +3.6% |
| 18 | Public Sector Pension Investment Board | 411,290 | $20.0M | 0.1% | 0.7% | +92.9% |
| 19 | VANGUARD FIDUCIARY TRUST CO | 397,640 | $19.3M | 0.0% | 0.6% | +2.9% |
| 20 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 365,464 | $17.8M | 0.0% | 0.6% | +41.7% |
| 21 | VICTORY CAPITAL MANAGEMENT INC | 331,132 | $16.1M | 0.0% | 0.5% | +3.1% |
| 22 | PRINCIPAL FINANCIAL GROUP INC | 289,290 | $14.1M | 0.0% | 0.5% | -0.1% |
| 23 | RAYMOND JAMES FINANCIAL INC | 283,593 | $13.8M | 0.0% | 0.5% | -3.7% |
| 24 | Nuveen, LLC | 274,427 | $13.4M | 0.0% | 0.4% | -35.4% |
| 25 | AMERICAN CENTURY COMPANIES INC | 245,038 | $11.9M | 0.0% | 0.4% | -6.2% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.