California Water Service Group
US ˙ NYSE ˙ US1307881029

SecurityCWT / California Water Service Group
InstitutionKBC Group NV
Latest Disclosed Ownership577,247 shares
Latest Disclosed Value $ 26,172
KBC Group NV reports 29.25% increase in ownership of CWT / California Water Service Group

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 577,247 shares of California Water Service Group (US:CWT) valued at $26,172,379 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 446,627 shares of California Water Service Group. This represents a change in shares of 29.25% during the quarter. The current value of the position is $25,831,803 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 577,247 130,620 29.25 26 36.84 0.0338
2026-01-26 2025-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 446,627 0 0.00 19 -5.00 0.0441
2026-01-20 2025-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 446,627 -116,707 -20.72 20 -20.00 0.0492
2025-08-08 2025-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 563,334 -627 -0.11 26 -7.41 0.0692
2025-04-25 2025-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 563,961 -62,335 -9.95 27 -3.57 0.0848
2025-01-22 2024-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 626,296 -92,013 -12.81 28 -26.32 0.0782
2024-11-06 2024-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 718,309 0 0.00 39 11.76 0.1177
2024-07-17 2024-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 718,309 15,316 2.18 35 6.25 0.1052
2024-05-08 2024-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 702,993 48,732 7.45 33 -3.03 0.1038
2024-02-13 2023-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 654,261 0 0.00 34 10.00 0.1203
2024-02-15 2023-09-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 654,261 95,501 17.09 31 7.14 0.1263
2023-11-22 2023-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 558,760 0 29 0.1201
2024-02-15 2023-06-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 558,760 28,351 5.35 29 -6.67 0.1186
2023-07-28 2023-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 558,760 28,351 29 0.1201
2024-02-14 2023-03-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 530,409 23,989 4.74 31 0.00 0.1310
2023-05-04 2023-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 530,409 40,485 31 0.1454
2024-02-14 2022-12-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 506,420 16,496 3.37 31 20.00 0.1490
2023-02-13 2022-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 489,924 0 26 0.0001
2024-02-15 2022-09-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 489,924 6,624 1.37 26 -3.85 0.1342
2022-11-08 2022-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 489,924 6,624 25,814 0.1349
2024-02-14 2022-06-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 483,300 6,461 1.35 27 -7.14 0.1339
2022-07-26 2022-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 483,300 6,461 26,847 0.1351
2024-02-14 2022-03-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 476,839 -2,618 -0.55 28 -17.65 0.1117
2022-05-06 2022-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 476,839 -2,618 28,267 0.1044
2024-02-14 2021-12-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 479,457 12,223 2.62 34 -99.88 0.1136
2022-02-03 2021-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 479,457 12,223 34,454 0.1079
2021-11-10 2021-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 467,234 -14,644 -3.04 27,534 2.88 0.1010
2022-02-15 2021-06-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 481,878 8,842 1.87 26,764 0.42 0.0965
2021-08-11 2021-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 481,878 8,842 26,764 0.0965
2022-02-14 2021-03-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 473,036 102,369 27.62 26,651 -86.69 0.1079
2021-04-26 2021-03-31 13F CALIFORNIA WATER SERVICE GRP COM 130788102 473,036 102,369 26,651 0.1079
2022-02-14 2020-12-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 370,667 5,025 1.37 200,271 1,160.60 0.0942
2021-02-10 2020-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 370,667 5,025 20,027 0.0922
2022-02-14 2020-09-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 365,642 -17,488 -4.56 15,887 -13.07 0.0936
2020-10-28 2020-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 365,642 -17,488 15,887 0.0940
2022-02-14 2020-06-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 383,130 -33,791 -8.10 18,275 -12.89 0.1208
2020-08-10 2020-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 383,130 -33,791 18,275 0.1223
2020-05-04 2020-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 416,921 -42,130 -9.18 20,979 -11.37 0.1756
2020-02-11 2019-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 459,051 -7,103 -1.52 23,669 -4.07 0.1496
2019-11-07 2019-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 466,154 9,692 2.12 24,674 6.76 0.1810
2019-08-08 2019-06-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 456,462 2,304 0.51 23,111 -6.25 0.1789
2019-07-30 2019-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 456,462 2,304 23,111
2019-08-07 2019-03-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 454,158 58,611 14.82 24,652 30.77 0.2031
2019-05-10 2019-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 454,158 58,611 24,652
2019-01-31 2018-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 395,547 -28,236 -6.66 18,852 3.70 0.2100
2018-11-14 2018-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 423,783 -34,135 -7.45 18,180 1.93 0.1375
2018-08-03 2018-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 457,918 114,523 33.35 17,836 39.44 0.1553
2018-08-03 2018-03-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 343,395 202,254 143.30 12,791 99.83 0.1183
2018-05-09 2018-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 343,395 202,254 12,791
2018-08-03 2017-12-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 141,141 0 0.00 6,401 18.87 0.0547
2018-02-07 2017-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 141,141 0 6,401
2017-11-13 2017-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 141,141 -21,140 -13.03 5,385 -9.83 0.0489
2017-08-04 2017-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 162,281 0 0.00 5,972 2.65 0.0577
2017-05-10 2017-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 162,281 0 0.00 5,818 5.76 0.0525
2017-02-16 2016-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 162,281 -5,349 -3.19 5,501 2.27 0.0545
2016-11-03 2016-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 167,630 3,829 2.34 5,379 -5.99 0.0635
2016-08-03 2016-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 163,801 0 0.00 5,722 30.73 0.0819
2016-05-11 2016-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 163,801 0 0.00 4,377 14.82 0.0727
2016-02-11 2015-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 163,801 17,304 11.81 3,812 17.62 0.0702
2015-11-12 2015-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 146,497 -3,088 -2.06 3,241 -5.18 0.0652
2015-12-16 2015-06-30 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 149,585 7,245 5.09 3,418 -2.03 0.0439
2015-07-31 2015-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 149,585 3,418
2015-12-16 2015-03-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 142,340 -4,345 -2.96 3,489 -3.35 0.0443
2015-04-30 2015-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 142,340 3,489
2015-12-15 2014-12-31 13F/A-1 CALIFORNIA WTR SVC GROUP COM 130788102 146,685 45,340 44.74 3,610 58.75 0.0430
2015-02-12 2014-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 146,685 3,610
2014-10-16 2014-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 101,345 -9,294 -8.40 2,274 -15.05 0.0794
2014-08-01 2014-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 110,639 0 0.00 2,677 1.06 0.0306
2014-04-30 2014-03-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 110,639 -54,348 -32.94 2,649 -30.40 0.0418
2014-01-21 2013-12-31 13F CALIFORNIA WTR SVC GROUP COM 130788102 164,987 -105,058 -38.90 3,806 -30.64 0.0576
2013-11-06 2013-09-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 270,045 -120,466 -30.85 5,487 -27.98 0.0883
2013-07-29 2013-06-30 13F CALIFORNIA WTR SVC GROUP COM 130788102 390,511 390,511 7,619 0.1413
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.