Who owns CALIFORNIA WATER SERVICE GROUP?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of CWT from SEC Form 13F filings across 345 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.
As of the 2026-06-30 reporting period, 345 institutions disclosed 55.2M shares of CALIFORNIA WATER SERVICE GROUP worth $2.70B — about 91.5% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
345
13F holders
$2.70B
value, 2026 filers
91.5%
of shares outstanding (55.2M sh)
57
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% | 17.8% | +4.3% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 4.4M | $213.1M | 0.0% | 7.3% | +2.1% |
| 3 | T. Rowe Price Investment Management, Inc. | 3.5M | $171.1M | 0.1% | 5.8% | +2.9% |
| 4 | Amundi | 3.5M | $169.7M | 0.0% | 5.8% | +0.5% |
| 5 | STATE STREET CORP | 3.3M | $158.9M | 0.0% | 5.4% | +5.3% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2.7M | $130.9M | 0.0% | 4.5% | +1.0% |
| 7 | ATLAS Infrastructure Partners (UK) Ltd.NEW | 2.0M | $96.6M | 2.9% | 3.3% | new |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 1.6M | $75.7M | 0.0% | 2.6% | +5.4% |
| 9 | FIRST TRUST ADVISORS LP | 1.3M | $63.2M | 0.0% | 2.2% | -4.0% |
| 10 | FMR LLC | 1.3M | $62.3M | 0.0% | 2.1% | -7.8% |
| 11 | DIMENSIONAL FUND ADVISORS LP | 1.2M | $57.2M | 0.0% | 1.9% | +1.4% |
| 12 | NUANCE INVESTMENTS, LLC | 1.1M | $53.3M | 9.1% | 1.8% | -31.7% |
| 13 | Invesco Ltd. | 974,775 | $47.4M | 0.0% | 1.6% | -2.7% |
| 14 | MORGAN STANLEY | 948,112 | $46.1M | 0.0% | 1.6% | -15.2% |
| 15 | Legal & General Group Plc | 807,510 | $39.3M | 0.0% | 1.3% | +3.9% |
| 16 | ANTIPODES PARTNERS LtdNEW | 753,386 | $36.7M | 0.7% | 1.2% | new |
| 17 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC.NEW | 747,216 | $36.4M | 0.1% | 1.2% | new |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 725,290 | $35.3M | 0.0% | 1.2% | -0.4% |
| 19 | NORTHERN TRUST CORP | 708,763 | $34.5M | 0.0% | 1.2% | +11.2% |
| 20 | AQR CAPITAL MANAGEMENT LLC | 681,791 | $33.2M | 0.0% | 1.1% | +301.7% |
| 21 | KBC Group NV | 577,247 | $28.1M | 0.1% | 1% | 0.0% |
| 22 | Bank of New York Mellon Corp | 527,076 | $25.6M | 0.0% | 0.9% | +4.0% |
| 23 | Triodos Investment Management BV | 493,000 | $24.0M | 1.5% | 0.8% | +19.1% |
| 24 | Beck Bode, LLC | 426,692 | $20.8M | 3.1% | 0.7% | +3.6% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 397,640 | $19.3M | 0.0% | 0.7% | +2.9% |
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.