California Water Service Group
US ˙ NYSE ˙ US1307881029

SecurityCWT / California Water Service Group
InstitutionProShare Advisors LLC
Latest Disclosed Ownership152,050 shares
Latest Disclosed Value $ 6,893,949
ProShare Advisors LLC reports 0.94% increase in ownership of CWT / California Water Service Group

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 152,050 shares of California Water Service Group (US:CWT) valued at $6,893,947 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 150,627 shares of California Water Service Group. This represents a change in shares of 0.94% during the quarter. The current value of the position is $6,878,742 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-24 2026-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 152,050 1,423 0.94 6,894 5.62 0.0102
2026-02-06 2025-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 150,627 985 0.66 6,527 -4.97 0.0115
2025-11-06 2025-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 149,642 672 0.45 6,867 1.36 0.0144
2025-08-07 2025-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 148,970 -18,449 -11.02 6,775 -16.49 0.0135
2025-05-08 2025-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 167,419 -14,782 -8.11 8,113 -1.77 0.0183
2025-02-14 2024-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 182,201 34,831 23.64 8,259 3.37 0.0189
2024-11-14 2024-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 147,370 -6,829 -4.43 7,990 6.86 0.0196
2024-08-13 2024-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 154,199 -28,377 -15.54 7,477 -11.89 0.0200
2024-05-08 2024-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 182,576 18,388 11.20 8,486 -0.35 0.0226
2024-02-14 2023-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 164,188 -11,072 -6.32 8,516 2.71 0.0260
2023-11-13 2023-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 175,260 16,094 10.11 8,292 0.90 0.0259
2023-08-10 2023-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 159,166 -21,491 -11.90 8,218 -21.85 0.0238
2023-05-26 2023-03-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 180,657 27,424 17.90 10,514 13.15 0.0321
2023-05-12 2023-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 180,657 27,424 10,514 0.0334
2023-02-02 2022-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 153,233 9,660 6.73 9,292 22.85 0.0326
2022-11-07 2022-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 143,573 -20,638 -12.57 7,564 -17.08 0.0290
2022-08-01 2022-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 164,211 -25,394 -13.39 9,122 -18.84 0.0303
2022-05-10 2022-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 189,605 26,219 16.05 11,239 -4.27 0.0241
2022-02-08 2021-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 163,386 4,855 3.06 11,740 25.67 0.0230
2021-11-12 2021-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 158,531 -36,602 -18.76 9,342 -13.80 0.0262
2021-08-13 2021-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 195,133 -48,832 -20.02 10,838 -21.15 0.0317
2021-05-14 2021-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 243,965 45,892 23.17 13,745 28.43 0.0432
2021-02-09 2020-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 198,073 16,869 9.31 10,702 35.93 0.0398
2020-11-13 2020-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 181,204 18,412 11.31 7,873 1.39 0.0364
2020-08-03 2020-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 162,792 -42,327 -20.64 7,765 -24.77 0.0415
2020-05-15 2020-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 205,119 -49,839 -19.55 10,322 -21.48 0.0742
2020-02-12 2019-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 254,958 46,373 22.23 13,146 19.08 0.0609
2019-11-12 2019-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 208,585 -16,189 -7.20 11,040 -2.99 0.0618
2019-08-13 2019-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 224,774 36,642 19.48 11,380 11.44 0.0681
2019-05-15 2019-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 188,132 10,982 6.20 10,212 20.95 0.0611
2019-02-14 2018-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 177,150 -3,985 -2.20 8,443 8.65 0.0591
2018-11-14 2018-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 181,135 9,090 5.28 7,771 15.97 0.0528
2018-08-13 2018-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 172,045 -18,744 -9.82 6,701 -5.71 0.0449
2018-05-14 2018-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 190,789 4,127 2.21 7,107 -16.04 0.0463
2018-02-14 2017-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 186,662 -15,005 -7.44 8,465 10.02 0.0587
2017-11-13 2017-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 201,667 -8,544 -4.06 7,694 -0.54 0.0707
2017-08-11 2017-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 210,211 9,415 4.69 7,736 7.46 0.0771
2017-05-12 2017-03-31 13F/A-2 CALIFORNIA WTR SVC GROUP COM 130788102 200,796 28,012 16.21 7,199 22.91 0.0753
2017-05-08 2017-03-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 200,796 0 7,199 0.0753
2017-04-25 2017-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 200,796 7,199
2017-02-13 2016-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 172,784 81,696 89.69 5,857 100.38 0.0649
2016-11-10 2016-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 91,088 26,575 41.19 2,923 29.74 0.0408
2016-08-12 2016-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 64,513 30,955 92.24 2,253 151.17 0.0290
2016-05-06 2016-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 33,558 17,747 112.24 897 143.75 0.0123
2016-02-05 2015-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 15,811 4,291 37.25 368 44.31 0.0045
2015-11-06 2015-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 11,520 1,623 16.40 255 12.83 0.0036
2015-08-11 2015-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 9,897 -2,305 -18.89 226 -24.41 0.0031
2015-05-08 2015-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 12,202 12,202 0.00 299 0.0035
2015-01-30 2014-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 0 -18,766 -100.00 0 -100.00
2014-11-06 2014-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 18,766 -4,247 -18.45 421 -24.42 0.0056
2014-08-08 2014-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 23,013 -25,264 -52.33 557 -51.82 0.0072
2014-05-07 2014-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 48,277 48,277 59.25 1,156 87.66 0.0145
2014-02-04 2013-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 0 -30,315 -100.00 0 -100.00
2013-11-07 2013-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 30,315 -87 -0.29 616 3.88 0.0146
2013-07-25 2013-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 30,402 30,402 593 0.0116
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.