BlackRock, Inc. ownership in WT5 / California Water Service Group

California Water Service Group

DE ˙ DB ˙ US1307881029

37,40 € ↓ -1,00 (-2,60%)

2026-06-02
AKTIENPREIS

Security	DE:WT5 / California Water Service Group
Institution	BlackRock, Inc.
Latest Disclosed Ownership	10,201,874 shares
Ownership	17.10%

2025-07-17 - BlackRock, Inc. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 10,201,874 shares of California Water Service Group (DE:WT5). This represents 17.1 percent ownership of the company. In their previous filing dated 2024-01-19 , BlackRock, Inc. had reported owning 10,687,783 shares, indicating a decrease of -4.55 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2025-07-17	2025-07-17	13G/A	10,687,783	10,201,874	-4.55	17.10	-7.57
2024-01-19	2024-01-19	13G/A	10,409,635	10,687,783	2.67	18.50	-2.63
2023-01-26	2023-01-26	13G/A	10,409,635	10,409,635	0.00	19.00	0.00
2023-01-20	2023-01-20	13G	9,468,858	10,409,635	9.94	19.00	5.56
2022-01-27	2022-01-27	13G/A	9,468,858	9,468,858	0.00	18.00	0.00
2022-01-26	2022-01-26	13G/A	8,253,577	9,468,858	14.72	18.00	8.43
2021-01-25	2021-01-25	13G	7,681,110	8,253,577	7.45	16.60	3.75
2020-02-04	2020-02-04	13G/A	7,470,871	7,681,110	2.81	16.00	3.23
2019-01-24	2019-01-24	13G/A	6,368,283	7,470,871	17.31	15.50	16.54
2018-01-19	2018-01-19	13G/A	5,520,443	6,368,283	15.36	13.30	15.65
2017-01-12	2017-01-12	13G/A	4,810,898	5,520,443	14.75	11.50	15.00
2016-07-08	2016-07-08	13G/A	3,579,076	4,810,898	34.42	10.00	33.33
2016-01-26	2016-01-26	13G/A	49,134	3,579,076	7,184.32	7.50
2015-01-30	2015-01-30	13G/A		3,012,767		6.30
2014-01-28	2014-01-28	13G/A		2,926,402		6.10
2013-02-06	2013-02-06	13G/A		2,556,334		6.10
2012-02-13	2012-02-13	13G/A		2,507,783		6.00

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-13	2026-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,308,555	-372,796	-3.49	467,390	0.99	0.0006
2026-02-12	2025-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,681,351	233,117	2.23	462,823	-3.47	0.0078
2025-11-12	2025-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,448,234	79,016	0.76	479,469	1.67	0.0084
2025-08-12	2025-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,369,218	-613,299	-5.58	471,592	-11.39	0.0090
2025-05-02	2025-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,982,517	-184,290	-1.65	532,213	5.14	0.0112
2025-02-07	2024-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	11,166,807	740,795	7.11	506,191	-10.46	0.0102
2024-11-13	2024-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,426,012	106,478	1.03	565,298	12.97	0.0119
2024-08-13	2024-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,319,534	-414,946	-3.87	500,394	0.29	0.0113
2024-05-10	2024-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,734,480	46,697	0.44	498,939	-10.00	0.0116
2024-02-13	2023-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,687,783	65,638	0.62	554,375	10.32	0.0141
2023-11-13	2023-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,622,145	290,796	2.81	502,534	-5.79	0.0145
2023-08-11	2023-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,331,349	30,785	0.30	533,408	-11.02	0.0147
2023-05-12	2023-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,300,564	-109,071	-1.05	599,493	-5.03	0.0177
2023-02-13	2022-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	10,409,635	680,947	7.00	631,240	23.14	0.0198
2022-11-14	2022-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	9,728,688	23,892	0.25	512,603	-4.92	0.0174
2022-08-12	2022-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	9,704,796	404,407	4.35	539,103	-2.22	0.0173
2022-05-12	2022-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	9,300,389	-168,469	-1.78	551,328	-18.97	0.0149
2022-02-10	2021-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	9,468,858	625,425	7.07	680,432	30.57	0.0173
2021-11-09	2021-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	8,843,433	-120,626	-1.35	521,144	4.68	0.0146
2021-08-11	2021-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	8,964,059	255,118	2.93	497,863	1.47	0.0139
2021-05-07	2021-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	8,708,941	455,364	5.52	490,661	10.03	0.0144
2021-02-05	2020-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	8,253,577	682,877	9.02	445,941	35.57	0.0142
2020-11-06	2020-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,570,700	-209,822	-2.70	328,947	-11.37	0.0121
2020-08-14	2020-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,780,522	309,521	4.14	371,131	-1.28	0.0148
2020-05-01	2020-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,471,001	-210,109	-2.74	375,939	-5.08	0.0184
2020-02-13	2019-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,681,110	191,014	2.55	396,039	-0.10	0.0152
2019-11-08	2019-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,490,096	107,578	1.46	396,450	6.07	0.0167
2019-08-22	2019-06-30	13F/A-1	CALIFORNIA WTR SVC GROUP	COM	130788102	7,382,518	-35,340	-0.48	373,776	-7.17	0.0160
2019-08-13	2019-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,382,518	-35,340		373,776
2019-05-09	2019-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,417,858	-53,013	-0.71	402,640	13.08	0.0180
2019-02-08	2018-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,470,871	155,103	2.12	356,064	13.45	0.0180
2018-11-09	2018-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,315,768	194,252	2.73	313,849	13.15	0.0136
2018-08-09	2018-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	7,121,516	590,505	9.04	277,382	14.02	0.0128
2018-05-09	2018-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	6,531,011	162,728	2.56	243,283	-15.76	0.0116
2018-02-09	2017-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	6,368,283	289,527	4.76	288,803	24.54	0.0137
2017-11-14	2017-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	6,078,756	163,135	2.76	231,903	6.53	0.0117
2017-08-10	2017-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	5,915,621	-24,015	-0.40	217,697	2.24	0.0115
2017-05-12	2017-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	5,939,636	5,872,773	8,783.29	212,936	9,288.71	0.0117
2017-02-10	2016-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	66,863	4,992	8.07	2,268	14.20	0.0032
2016-11-08	2016-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	61,871	3,251	5.55	1,986	-3.03	0.0029
2016-08-10	2016-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	58,620	5,090	9.51	2,048	43.22	0.0031
2016-05-10	2016-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	53,530	4,396	8.95	1,430	25.11	0.0023
2016-02-11	2015-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	49,134	2,419	5.18	1,143	10.65	0.0017
2015-11-13	2015-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	46,715	-7,187	-13.33	1,033	-16.15	0.0016
2015-08-07	2015-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	53,902	9,570	21.59	1,232	13.34	0.0018
2015-05-13	2015-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	44,332	5,584	14.41	1,087	14.06	0.0015
2015-02-09	2014-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	38,748	-1,313	-3.28	953	6.01	0.0014
2014-10-29	2014-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	40,061	-1,122	-2.72	899	-9.83	0.0013
2014-08-06	2014-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	41,183	1,167	2.92	997	4.07	0.0015
2014-05-02	2014-03-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	40,016	2,323	6.16	958	10.24	0.0015
2014-02-12	2013-12-31	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	37,693	4,690	14.21	869	29.70	0.0014
2013-11-12	2013-09-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	33,003	2,434	7.96	670	12.42	0.0013
2013-08-13	2013-06-30	13F	CALIFORNIA WTR SVC GROUP	COM	130788102	30,569	30,569		596		0.0012

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.