California Water Service Group
DE ˙ DB ˙ US1307881029
38,20 € ↓ -0,60 (-1,55%)
2026-06-04
DEL PRIS
SecurityDE:WT5 / California Water Service Group
InstitutionWulff, Hansen & Co.
Latest Disclosed Ownership19,375 shares
Latest Disclosed Value $ 878,463
Wulff, Hansen & Co. reports 1.27% decrease in ownership of WT5 / California Water Service Group

On May 7, 2026 - Wulff, Hansen & Co. filed a 13F-HR form disclosing ownership of 19,375 shares of California Water Service Group (DE:WT5) valued at $775,000 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 19,625 shares of California Water Service Group. This represents a change in shares of -1.27% during the quarter. The current value of the position is $740,125 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)
2026-05-07 2026-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 19,375 -250 -1.27 878 3.29 0.8972
2026-02-03 2025-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 19,625 -1,600 -7.54 850 -12.73 0.7134
2025-11-07 2025-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 21,225 -430 -1.99 974 -1.02 0.8384
2025-08-12 2025-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 21,655 -220 -1.01 985 -7.17 0.8429
2025-05-14 2025-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 21,875 1,235 5.98 1,060 13.37 0.9665
2025-02-11 2024-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 20,640 -60 -0.29 936 -16.67 0.8852
2024-11-12 2024-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 20,700 -1,030 -4.74 1,122 6.55 1.0167
2024-08-14 2024-06-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 21,730 -855 -3.79 1,054 0.38 1.0403
2024-08-09 2024-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 1,053,688 1,031,103 22 1.8976
2024-05-02 2024-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,585 0 0.00 1,050 -10.42 1.0481
2024-02-12 2023-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,585 0 0.00 1,171 9.64 1.3005
2023-11-08 2023-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,585 0 0.00 1,068 -8.40 1.2470
2023-08-09 2023-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,585 0 0.00 1,166 -11.26 1.3053
2023-05-08 2023-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,585 0 0.00 1,314 -4.02 1.5001
2023-02-07 2022-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,585 0 0.00 1,370 15.04 1.6628
2022-11-04 2022-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,585 0 0.00 1,190 -5.18 1.4885
2022-07-26 2022-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,585 -20 -0.09 1,255 -6.34 1.4218
2022-05-10 2022-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,605 -260 -1.14 1,340 -18.44 1.2758
2022-02-14 2021-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 22,865 22,865 1,643 1.4191
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.