California Water Service Group
US ˙ NYSE ˙ US1307881029

SecurityCWT / California Water Service Group
InstitutionCoreCommodity Management, LLC
Latest Disclosed Ownership28,561 shares
Latest Disclosed Value $ 1,294,956
CoreCommodity Management, LLC reports 9.86% decrease in ownership of CWT / California Water Service Group

On May 15, 2026 - CoreCommodity Management, LLC filed a 13F-HR form disclosing ownership of 28,561 shares of California Water Service Group (US:CWT) valued at $1,294,956 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 31,684 shares of California Water Service Group. This represents a change in shares of -9.86% during the quarter. The current value of the position is $1,278,105 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)
2026-05-15 2026-03-31 13F CALIFORNIA WATER SERVICE GRP COM 130788102 28,561 -3,123 -9.86 1,295 -5.69 0.2395
2026-02-12 2025-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 31,684 6,104 23.86 1,373 16.97 0.2881
2025-11-14 2025-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 25,580 -10,374 -28.85 1,174 -28.26 0.2130
2025-08-14 2025-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 35,954 -3,803 -9.57 1,635 -15.11 0.2692
2025-05-15 2025-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 39,757 4,524 12.84 1,927 20.60 0.3132
2025-02-14 2024-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 35,233 -83 -0.24 1,597 -16.56 0.3120
2024-11-14 2024-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 35,316 -1,285 -3.51 1,915 7.89 0.3525
2024-08-14 2024-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 36,601 5,679 18.37 1,775 23.45 0.6874
2024-05-15 2024-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 30,922 -11,128 -26.46 1,437 -34.11 0.5120
2024-02-14 2023-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 42,050 6,738 19.08 2,181 30.60 0.6481
2023-11-14 2023-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 35,312 -305 -0.86 1,671 -9.14 0.5599
2023-08-14 2023-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 35,617 -382 -1.06 1,839 -12.27 0.5409
2023-05-15 2023-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 35,999 -62 -0.17 2,095 -4.16 0.5987
2023-02-14 2022-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 36,061 -60 -0.17 2,187 14.87 0.6744
2022-11-14 2022-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 36,121 -9,826 -21.39 1,903 -25.43 0.6935
2022-08-15 2022-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 45,947 -787 -1.68 2,552 -7.87 0.6695
2022-05-16 2022-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 46,734 33,466 252.23 2,770 190.66 0.6084
2022-02-14 2021-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 13,268 13,268 953 0.2622
2021-11-15 2021-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 0 -9,473 -100.00 0 -100.00
2021-08-16 2021-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 9,473 -227 -2.34 526 -3.66 0.1631
2021-05-17 2021-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 9,700 -367 -3.65 546 0.37 0.2289
2021-02-16 2020-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 10,067 -4,575 -31.25 544 -14.47 0.2759
2020-11-16 2020-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 14,642 0 0.00 636 -8.88 0.5202
2020-08-12 2020-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 14,642 -3,492 -19.26 698 -23.55 0.6543
2020-05-13 2020-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 18,134 2,884 18.91 913 16.16 1.0542
2020-02-04 2019-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 15,250 -176 -1.14 786 -3.68 0.4384
2019-11-14 2019-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 15,426 0 0.00 816 4.48 0.5121
2019-08-14 2019-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 15,426 948 6.55 781 -0.64 0.4328
2019-05-15 2019-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 14,478 981 7.27 786 22.24 0.4464
2019-02-14 2018-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 13,497 -308 -2.23 643 8.61 0.5400
2018-11-14 2018-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 13,805 7,086 105.46 592 125.95 0.2957
2018-08-13 2018-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 6,719 437 6.96 262 11.97 0.1758
2018-05-15 2018-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 6,282 3,069 95.52 234 60.27 0.1767
2018-02-14 2017-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 3,213 3,213 146 0.1210
2017-11-14 2017-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 0 -25,646 -100.00 0 -100.00
2017-08-14 2017-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 25,646 54 0.21 944 2.94 0.9075
2017-05-15 2017-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 25,592 6,133 31.52 917 38.94 0.7435
2017-02-14 2016-12-31 13F CALIFORNIA WATER SERVICE GRP COM 130788102 19,459 2,672 15.92 660 22.45 0.5802
2016-11-14 2016-09-30 13F CALIFORNIA WATER SERVICE GRP COM 130788102 16,787 112 0.67 539 -7.39 0.5503
2016-08-15 2016-06-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 16,675 2,695 19.28 582 55.61 0.5732
2016-05-16 2016-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 13,980 129 0.93 374 16.15 0.3871
2016-02-16 2015-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 13,851 1,708 14.07 322 19.70 0.3015
2015-11-16 2015-09-30 13F CALIFORNIA WATER SERVICE GRP COM 130788102 12,143 12,143 0.00 269 0.2476
2015-08-14 2015-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 0 -7,154 -100.00 0 -100.00
2015-05-15 2015-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 7,154 7,154 175 0.1104
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.