California Water Service Group
CWT- Exchange
- NYSE
- Industry
- Water Supply
- SEC CIK
- 0001035201
In the last 90 days, California Water Service Group insiders filed 0 open-market purchases and 2 sales; 346 institutions reported holding it in 13F filings for Q2 2026, worth $2.69B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in California Water Service Group as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 339
- +15 vs. Q4 2025
- Shares held
- 51.3M
- +8.55M (+20.0%) vs. Q4 2025
- Total value
- $2.32B
- +$473.4M (+25.6%) vs. Q4 2025
- New holders
- 46
- 140 more added
- Sold out
- 31
- 88 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CWT on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 346 | $2.69B |
| Q1 2026 | 339 | $2.32B |
| Q4 2025 | 329 | $2.17B |
| Q3 2025 | 337 | $2.30B |
| Q2 2025 | 338 | $2.29B |
| Q1 2025 | 330 | $2.45B |
| Q4 2024 | 323 | $2.23B |
| Q3 2024 | 324 | $2.63B |
| Q2 2024 | 299 | $2.34B |
| Q1 2024 | 275 | $2.27B |
| Q4 2023 | 285 | $2.47B |
| Q3 2023 | 273 | $2.26B |
| Q2 2023 | 286 | $2.44B |
| Q1 2023 | 299 | $2.61B |
| Q4 2022 | 295 | $2.73B |
| Q3 2022 | 281 | $2.31B |
| Q2 2022 | 281 | $2.44B |
| Q1 2022 | 312 | $2.51B |
| Q4 2021 | 307 | $2.96B |
| Q3 2021 | 268 | $2.40B |
| Q2 2021 | 251 | $2.20B |
| Q1 2021 | 259 | $2.18B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding California Water Service Group; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Amalgamated Bank | 17,163 | $778.0K | 0.01% | −156−0.9% | Reduced |
| Virtue Capital Management, LLC | 17,578 | $806.9K | 0.12% | +12,845+271.4% | Added |
| Alps Advisors Inc | 18,035 | $817.7K | 0.00% | −874−4.6% | Reduced |
| Creative Planning | 18,240 | $827.0K | 0.00% | +5,278+40.7% | Added |
| Cerity Partners LLC | 19,116 | $866.7K | 0.00% | +1,379+7.8% | Added |
| Wulff, Hansen & Co. | 19,375 | $878.5K | 0.90% | −250−1.3% | Reduced |
| XTX Topco Ltd | 19,379 | $878.6K | 0.02% | −17,440−47.4% | Reduced |
| Allspring Global Investments Holdings, LLC | 19,360 | $881.1K | 0.00% | +2,004+11.5% | Added |
| Teton Advisors, LLC | 20,060 | $909.5K | 0.64% | 00.0% | Unchanged |
| Y-Intercept (Hong Kong) Ltd | 20,082 | $910.5K | 0.02% | +126+0.6% | Added |
| Freestone Grove Partners LP | 20,524 | $930.6K | 0.01% | +1,882+10.1% | Added |
| CenterBook Partners LP | 20,763 | $941.4K | 0.05% | −13,498−39.4% | Reduced |
| Campbell & CO Investment Adviser LLC | 21,566 | $977.8K | 0.06% | +8,329+62.9% | Added |
| Bank of Montreal | 22,141 | $1.00M | 0.00% | +402+1.8% | Added |
| BNP Paribas Arbitrage, SA | 22,485 | $1.02M | 0.00% | −9,116−28.8% | Reduced |
| Canvas Wealth Advisors, LLC | 22,624 | $1.03M | 0.17% | −460−2.0% | Reduced |
| Handelsbanken Fonder AB | 22,716 | $1.03M | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 22,892 | $1.04M | 0.00% | +913+4.2% | Added |
| Van Eck Associates Corp | 24,116 | $1.09M | 0.00% | +1,011+4.4% | Added |
| Davy Global Fund Management Ltd | 24,268 | $1.10M | 0.08% | +978+4.2% | Added |
| Voloridge Investment Management, LLC | 25,216 | $1.14M | 0.00% | +25,216 | New |
| Vanguard Global Advisers, LLC | 25,836 | $1.17M | 0.00% | +25,836 | New |
| Janus Henderson Group PLC | 25,873 | $1.17M | 0.00% | 00.0% | Unchanged |
| Elo Mutual Pension Insurance Co | 26,099 | $1.18M | 0.02% | +26,099 | New |
| Allworth Financial LP | 26,265 | $1.19M | 0.00% | +327+1.3% | Added |
| Manufacturers Life Insurance Company, The | 26,383 | $1.20M | 0.00% | −924−3.4% | Reduced |
| Louisiana State Employees Retirement System | 26,400 | $1.20M | 0.02% | −900−3.3% | Reduced |
| State of Wisconsin Investment Board | 26,752 | $1.21M | 0.00% | −7,142−21.1% | Reduced |
| HighTower Advisors, LLC | 27,852 | $1.26M | 0.00% | +2,552+10.1% | Added |
| Colony Group, LLC | 28,180 | $1.28M | 0.00% | +1,818+6.9% | Added |
| Susquehanna International Group, LLP | 28,312 | $1.28M | 0.00% | +23,628+504.4% | Added |
| CoreCommodity Management, LLC | 28,561 | $1.29M | 0.24% | −3,123−9.9% | Reduced |
| Arjuna Capital | 28,638 | $1.30M | 0.33% | +586+2.1% | Added |
| Fifth Third Bancorp | 29,884 | $1.35M | 0.00% | +29,559+9,095.1% | Added |
| New York State Common Retirement Fund | 30,544 | $1.38M | 0.00% | 00.0% | Unchanged |
| Illinois Municipal Retirement Fund | 30,703 | $1.39M | 0.02% | −3,132−9.3% | Reduced |
| State of Alaska, Department of Revenue | 31,223 | $1.41M | 0.02% | −940−2.9% | Reduced |
| Kennedy Capital Management, Inc. | 31,770 | $1.44M | 0.03% | +2,855+9.9% | Added |
| Canada Pension Plan Investment Board | 32,700 | $1.48M | 0.00% | 00.0% | Unchanged |
| MetLife Investment Management | 33,075 | $1.50M | 0.01% | −262−0.8% | Reduced |
| Voya Investment Management LLC | 33,422 | $1.52M | 0.00% | +9,718+41.0% | Added |
| Citadel Advisors LLC | 34,698 | $1.57M | 0.00% | −138,032−79.9% | Reduced |
| South Dakota Investment Council | 34,715 | $1.57M | 0.03% | +4,800+16.0% | Added |
| Nia Impact Advisors, LLC | 35,916 | $1.63M | 0.72% | −1,300−3.5% | Reduced |
| Capital Fund Management S.A. | 37,327 | $1.69M | 0.02% | +13,050+53.8% | Added |
| Bridge City Capital, LLC | 38,292 | $1.74M | 0.48% | −284−0.7% | Reduced |
| Vontobel Holding Ltd. | 40,145 | $1.82M | 0.01% | +6,529+19.4% | Added |
| Mackenzie Financial Corp | 41,040 | $1.86M | 0.00% | +25,406+162.5% | Added |
| Kornitzer Capital Management Inc | 42,500 | $1.93M | 0.04% | +42,500 | New |
| Gabelli Funds LLC | 43,200 | $1.96M | 0.01% | 00.0% | Unchanged |
| HRT Financial LP | 43,235 | $1.96M | 0.00% | +9,034+26.4% | Added |
| SG Americas Securities, LLC | 44,335 | $2.01M | 0.00% | +4,515+11.3% | Added |
| Vanguard Investments Australia, Ltd. | 44,533 | $2.02M | 0.01% | +44,533 | New |
| Wedge Capital Management L L P | 44,565 | $2.02M | 0.04% | +44,565 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 46,984 | $2.13M | 0.00% | +9,660+25.9% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 47,167 | $2.14M | 0.00% | +4,037+9.4% | Added |
| State of New Jersey Common Pension Fund D | 48,678 | $2.21M | 0.01% | +748+1.6% | Added |
| Squarepoint Ops LLC | 49,016 | $2.22M | 0.00% | +49,016 | New |
| Storebrand Asset Management AS | 49,165 | $2.23M | 0.01% | −8,384−14.6% | Reduced |
| Clear Harbor Asset Management, LLC | 49,311 | $2.24M | 0.15% | −349−0.7% | Reduced |
| Barclays PLC | 49,573 | $2.25M | 0.00% | −72,948−59.5% | Reduced |
| Rodgers Brothers Inc. | 50,025 | $2.27M | 0.26% | −2,150−4.1% | Reduced |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 51,806 | $2.35M | 0.08% | −2,601−4.8% | Reduced |
| Wells Fargo & Company | 52,807 | $2.39M | 0.00% | −45,795−46.4% | Reduced |
| Exchange Traded Concepts, LLC | 52,812 | $2.39M | 0.02% | +1,437+2.8% | Added |
| Midwest Trust Co | 52,833 | $2.40M | 0.03% | −1,595−2.9% | Reduced |
| SEI Investments Co | 52,883 | $2.40M | 0.00% | +29,797+129.1% | Added |
| Macquarie Group Ltd | 53,445 | $2.42M | 0.01% | +19,813+58.9% | Added |
| Vanguard Asset Management, Ltd | 55,723 | $2.53M | 0.00% | +55,723 | New |
| California State Teachers Retirement System | 56,273 | $2.55M | 0.00% | −445−0.8% | Reduced |
| TD Asset Management Inc | 58,038 | $2.63M | 0.00% | 00.0% | Unchanged |
| Allianz Asset Management GmbH | 58,862 | $2.67M | 0.00% | +5,318+9.9% | Added |
| Northstar Asset Management Inc | 59,981 | $2.72M | 0.83% | −22,880−27.6% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 60,272 | $2.73M | 0.00% | +24,641+69.2% | Added |
| Thrivent Financial for Lutherans | 60,360 | $2.74M | 0.01% | +17,753+41.7% | Added |
| Millennium Management LLC | 61,281 | $2.78M | 0.00% | −28,876−32.0% | Reduced |
| Magellan Asset Management Ltd | 61,416 | $2.78M | 0.04% | +12,682+26.0% | Added |
| Prudential Financial Inc | 61,553 | $2.79M | 0.00% | −8,280−11.9% | Reduced |
| Maryland State Retirement & Pension System | 61,780 | $2.80M | 0.06% | −2,717−4.2% | Reduced |
| Alliancebernstein L.P. | 65,816 | $2.85M | 0.00% | −17,438−20.9% | Reduced |
| New York State Teachers Retirement System | 63,026 | $2.86M | 0.01% | +240.0% | Added |
| Jacobs Levy Equity Management, Inc | 66,489 | $3.01M | 0.01% | −14,430−17.8% | Reduced |
| Franklin Resources Inc | 67,573 | $3.06M | 0.00% | +17,180+34.1% | Added |
| Two Sigma Investments, LP | 76,976 | $3.49M | 0.00% | +53,900+233.6% | Added |
| D. E. Shaw & Co., Inc. | 82,792 | $3.75M | 0.00% | +16,601+25.1% | Added |
| Price T Rowe Associates Inc | 83,413 | $3.78M | 0.00% | +9,033+12.1% | Added |
| Duff & Phelps Investment Management Co | 85,115 | $3.86M | 0.04% | +85,115 | New |
| Trexquant Investment LP | 86,599 | $3.93M | 0.03% | −48,993−36.1% | Reduced |
| Great West Life Assurance Co | 94,557 | $4.30M | 0.01% | −2,624−2.7% | Reduced |
| Deutsche Bank AG | 95,417 | $4.33M | 0.00% | +8,427+9.7% | Added |
| Renaissance Technologies LLC | 100,400 | $4.55M | 0.01% | −11,500−10.3% | Reduced |
| Crawford Investment Counsel Inc | 102,989 | $4.67M | 0.08% | +11,000+12.0% | Added |
| Martingale Asset Management L P | 103,980 | $4.71M | 0.12% | +22,533+27.7% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 105,960 | $4.80M | 0.02% | −6,192−5.5% | Reduced |
| Swiss National Bank | 117,500 | $5.33M | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 121,899 | $5.53M | 0.00% | +22,825+23.0% | Added |
| Jane Street Group, LLC | 123,278 | $5.59M | 0.01% | +79,894+184.2% | Added |
| Federated Hermes, Inc. | 129,191 | $5.86M | 0.01% | +7,171+5.9% | Added |
| Meiji Yasuda Asset Management Co Ltd. | 134,116 | $6.08M | 0.30% | +49,317+58.2% | Added |
| Ameriprise Financial Inc | 136,151 | $6.17M | 0.00% | −10,959−7.4% | Reduced |