California Water Service GrpCWT
13F holders, Q1 2026 (March 31)339holders +10
40new positions
30sold out
6famous investors
$45.34avg. 13F price*
At the end of Q1 2026, 339 institutions reported holding California Water Service Grp (CWT) in their 13F filings, up 10 from Q4 2025. 40 opened new positions and 30 sold out. The largest holders were BlackRock, Inc. ($467.4M), Vanguard Portfolio Management LLC ($194.5M) and Amundi ($157.4M). 6 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- California Water Service Grp
- CUSIP
- 130788102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 40 | $28.9M |
| Exits | 30 | $30.0M |
All 13F filers, Q4 2025 → Q1 2026: 3,613,087 shares bought and 2,489,173 shares sold, net +1,123,914 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 339 holders
| BlackRock, Inc. | 0.01% | Reduce -3.5% | 10,308,555 | $467.4M |
| Vanguard Portfolio Management LLC | 0.01% | — | 4,289,673 | $194.5M |
| Amundi | 0.04% | Add +26.7% | 3,470,997 | $157.4M |
| T. Rowe Price Investment Management, Inc. | 0.11% | Add +2.4% | 3,418,294 | $155.0M |
| State Street Corp. | 0.00% | Add +2.4% | 3,102,659 | $140.7M |
| Vanguard Capital Management LLC | 0.00% | — | 2,665,225 | $120.8M |
| Nuance Investments, LLC | 10.14% | Reduce -12.1% | 1,603,748 | $72.7M |
| Geode Capital Management, LLC | 0.00% | Add +3.8% | 1,475,405 | $66.9M |
| FMR LLC | 0.00% | Reduce -22.6% | 1,390,014 | $63.0M |
| First Trust Advisors LP | 0.04% | Reduce -1.0% | 1,354,165 | $61.4M |
| Dimensional Fund Advisors LP | 0.01% | Add +0.4% | 1,158,359 | $52.5M |
| Morgan Stanley | 0.00% | Add +45.9% | 1,118,705 | $50.7M |
| Invesco Ltd. | 0.00% | Add +5.0% | 1,002,232 | $45.4M |
| Legal & General Group Plc | 0.01% | Add +1.8% | 777,542 | $35.3M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +2.5% | 728,456 | $33.0M |
| CBRE Investment Management Listed Real Assets LLC | 0.44% | Reduce -10.4% | 647,515 | $29.4M |
| Northern Trust Corp. | 0.00% | Add +4.2% | 637,303 | $28.9M |
| KBC Group NV | 0.07% | Add +29.3% | 577,247 | $26.2M |
| Bank of New York Mellon Corp | 0.00% | Add +0.4% | 506,702 | $23.0M |
| Nuveen, LLC | 0.01% | Reduce -3.4% | 425,114 | $19.3M |
| Triodos Investment Management BV | 1.42% | No change | 414,000 | $18.8M |
| Beck Bode, LLC | 3.16% | Add +6.0% | 411,714 | $18.7M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 386,412 | $17.5M |
| Victory Capital Management Inc. | 0.01% | Add +1.9% | 321,315 | $14.6M |
| Raymond James Financial Inc. | 0.00% | Add +4.5% | 294,518 | $13.4M |
| Principal Financial Group Inc. | 0.01% | Add +2.0% | 289,623 | $13.1M |
| Goldman Sachs Group Inc. | 0.00% | Add +25.5% | 283,976 | $12.9M |
| American Century Companies Inc. | 0.01% | Add +104.1% | 261,258 | $11.8M |
| Arrowstreet Capital, Limited Partnership | 0.01% | Add +416.9% | 257,970 | $11.7M |
| Marshall Wace, LLP | 0.01% | New | 256,767 | $11.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +0.0% | 234,733 | $10.6M |
| Public Sector Pension Investment Board | 0.03% | Add +3.4% | 213,166 | $9.7M |
| Qube Research & Technologies Ltd | 0.01% | Add +1752.4% | 186,926 | $8.5M |
| UBS Group AG | 0.00% | Reduce -13.3% | 185,826 | $8.4M |
| Rhumbline Advisers | 0.01% | Add +0.4% | 174,397 | $7.9M |
| AQR Capital Management | 0.00% | Add +177.6% | 169,731 | $7.7M |
| JPMorgan Chase & Co. | 0.00% | Reduce -33.1% | 151,087 | $7.0M |
| ProShare Advisors LLC | 0.01% | Add +0.9% | 152,050 | $6.9M |
| Mariner, LLC | 0.01% | Add +58.7% | 138,231 | $6.3M |
| Ameriprise Financial Inc. | 0.00% | Reduce -7.5% | 136,151 | $6.2M |
| Meiji Yasuda Asset Management Co Ltd. | 0.30% | Add +58.2% | 134,116 | $6.1M |
| Federated Hermes, Inc. | 0.01% | Add +5.9% | 129,191 | $5.9M |
| Jane Street Group, LLC | 0.01% | Add +184.2% | 123,278 | $5.6M |
| Bank of America Corp. | 0.00% | Add +23.0% | 121,899 | $5.5M |
| Swiss National Bank | 0.00% | No change | 117,500 | $5.3M |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.02% | Reduce -5.5% | 105,960 | $4.8M |
| Martingale Asset Management L P | 0.12% | Add +27.7% | 103,980 | $4.7M |
| Crawford Investment Counsel Inc. | 0.08% | Add +12.0% | 102,989 | $4.7M |
| Renaissance Technologies | 0.01% | Reduce -10.3% | 100,400 | $4.6M |
| Deutsche Bank AG | 0.00% | Add +9.7% | 95,417 | $4.3M |
| CANADA LIFE ASSURANCE Co | 0.01% | Reduce -2.7% | 94,557 | $4.3M |
| Trexquant Investment LP | 0.03% | Reduce -36.1% | 86,599 | $3.9M |
| Duff & Phelps Investment Management Co. | 0.04% | New | 85,115 | $3.9M |
| T. Rowe Price Associates Inc. | 0.00% | Add +12.1% | 83,413 | $3.8M |
| D. E. Shaw & Co. | 0.00% | Add +25.1% | 82,792 | $3.8M |
| Two Sigma Investments, LP | 0.00% | Add +233.6% | 76,976 | $3.5M |
| Franklin Resources Inc. | 0.00% | Add +34.1% | 67,573 | $3.1M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Reduce -17.8% | 66,489 | $3.0M |
| New York State Teachers Retirement System | 0.01% | Add +0.0% | 63,026 | $2.9M |
| Alliancebernstein L.P. | 0.00% | Reduce -20.9% | 65,816 | $2.9M |
| Maryland State Retirement & Pension System | 0.06% | Reduce -4.2% | 61,780 | $2.8M |
| Prudential Financial Inc. | 0.00% | Reduce -11.9% | 61,553 | $2.8M |
| Magellan Asset Management Ltd | 0.04% | Add +26.0% | 61,416 | $2.8M |
| Millennium Management | 0.00% | Reduce -32.0% | 61,281 | $2.8M |
| Thrivent Financial for Lutherans | 0.01% | Add +41.7% | 60,360 | $2.7M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Add +69.2% | 60,272 | $2.7M |
| Northstar Asset Management Inc. | 0.83% | Reduce -27.6% | 59,981 | $2.7M |
| Allianz Asset Management GmbH | 0.00% | Add +9.9% | 58,862 | $2.7M |
| TD Asset Management Inc | 0.00% | No change | 58,038 | $2.6M |
| California State Teachers Retirement System | 0.00% | Reduce -0.8% | 56,273 | $2.6M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 55,723 | $2.5M |
| Macquarie Group Ltd. | 0.01% | Add +58.9% | 53,445 | $2.4M |
| Sei Investments Co. | 0.00% | Add +129.1% | 52,883 | $2.4M |
| Midwest Trust Co | 0.03% | Reduce -2.9% | 52,833 | $2.4M |
| Exchange Traded Concepts, LLC | 0.02% | Add +2.8% | 52,812 | $2.4M |
| Wells Fargo & Company | 0.00% | Reduce -46.4% | 52,807 | $2.4M |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 0.08% | Reduce -4.8% | 51,806 | $2.3M |
| Rodgers Brothers Inc. | 0.26% | Reduce -4.1% | 50,025 | $2.3M |
| Barclays PLC | 0.00% | Reduce -59.5% | 49,573 | $2.2M |
| Clear Harbor Asset Management, LLC | 0.16% | Reduce -0.7% | 49,311 | $2.2M |
| Storebrand Asset Management As | 0.01% | Reduce -14.6% | 49,165 | $2.2M |
| Squarepoint Ops LLC | 0.00% | New | 49,016 | $2.2M |
| State of New Jersey Common Pension Fund D | 0.01% | Add +1.6% | 48,678 | $2.2M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +9.4% | 47,167 | $2.1M |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | Add +25.9% | 46,984 | $2.1M |
| Wedge Capital Management L L P | 0.04% | New | 44,565 | $2.0M |
| Vanguard Investments Australia, Ltd. | 0.01% | — | 44,533 | $2.0M |
| SG Americas Securities, LLC | 0.00% | Add +11.3% | 44,335 | $2.0M |
| HRT Financial LP | 0.00% | Add +26.4% | 43,235 | $2.0M |
| Gabelli Funds LLC | 0.01% | No change | 43,200 | $2.0M |
| Kornitzer Capital Management Inc. | 0.04% | New | 42,500 | $1.9M |
| Mackenzie Financial Corp. | 0.00% | Add +162.5% | 41,040 | $1.9M |
| Vontobel Holding Ltd. | 0.01% | Add +19.4% | 40,145 | $1.8M |
| Bridge City Capital, LLC | 0.48% | Reduce -0.7% | 38,292 | $1.7M |
| Capital Fund Management S.A. | 0.02% | Add +53.8% | 37,327 | $1.7M |
| Nia Impact Advisors, LLC | 0.72% | Reduce -3.5% | 35,916 | $1.6M |
| South Dakota Investment Council | 0.03% | Add +16.1% | 34,715 | $1.6M |
| Citadel Advisors | 0.00% | Reduce -79.9% | 34,698 | $1.6M |
| Voya Investment Management LLC | 0.00% | Add +41.0% | 33,422 | $1.5M |
| MetLife Investment Management, LLC | 0.01% | Reduce -0.8% | 33,075 | $1.5M |
"% of holder's portfolio" is CWT's weight in each manager's 13F, not the share of California Water Service Grp the manager owns.