Company · Ownership research

CALIFORNIA WATER SERVICE GROUP CWT

CIK 0001035201 · CUSIP 130788102

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 130788102 (CWT), not CUSIP 130788902 (CWT), and does not merge CUSIPs.

This page lists the top 20 of 274 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock Inc. CIK 1364742 · View history	$498.94M 10,734,480 shares	0.01%	+46.70K(+0.40%)Added	SEC filing ↗ May 10, 2024	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$334.61M 7,198,981 shares	0.01%	+232.34K(+3.30%)Added	SEC filing ↗ May 10, 2024	▾
03	STATE STREET CORP CIK 93751 · View history	$160.56M 3,454,324 shares	0.01%	+22.02K(+0.60%)Added	SEC filing ↗ May 15, 2024	▾
04	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$148.69M 3,199,034 shares	0.09%	+290.50K(+10.00%)Added	SEC filing ↗ May 15, 2024	▾
05	NUANCE INVESTMENTS, LLC CIK 1473182 · View history	$140.08M 3,013,749 shares	3.67%	+872.87K(+40.80%)Added	SEC filing ↗ May 7, 2024	▾
06	Amundi CIK 1330387 · View history	$91.76M 1,990,028 shares	0.04%	+340.81K(+20.70%)Added	SEC filing ↗ May 15, 2024	▾
07	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$58.74M 1,263,454 shares	0.01%	+34.38K(+2.80%)Added	SEC filing ↗ May 13, 2024	▾
08	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$58.71M 1,263,029 shares	0.02%	+13.98K(+1.10%)Added	SEC filing ↗ May 10, 2024	▾
09	Invesco Ltd. CIK 914208 · View history	$46.05M 990,840 shares	0.01%	+116.37K(+13.30%)Added	SEC filing ↗ May 14, 2024	▾
10	NORTHERN TRUST CORP CIK 73124 · View history	$45.77M 984,820 shares	0.01%	+21.21K(+2.20%)Added	SEC filing ↗ May 14, 2024	▾
11	Impax Asset Management Group plc CIK 1749768 · View history	$40.04M 861,344 shares	0.15%	-709.43K(-45.20%)Reduced	SEC filing ↗ Apr 30, 2024	▾
12	MORGAN STANLEY CIK 895421 · Amended · View history	$34.08M 733,221 shares	0.00%	-7.72K(-1.00%)Reduced	SEC filing ↗ Oct 17, 2024	▾
13	FIRST TRUST ADVISORS LP CIK 1125816 · View history	$33.64M 723,751 shares	0.03%	+101.93K(+16.40%)Added	SEC filing ↗ May 13, 2024	▾
14	KBC Group NV CIK 1411133 · View history	$32.67M 702,993 shares	0.10%	+48.73K(+7.40%)Added	SEC filing ↗ May 8, 2024	▾
15	DEPRINCE RACE & ZOLLO INC CIK 1008894 · View history	$31.32M 673,907 shares	0.67%	+3.31K(+0.50%)Added	SEC filing ↗ May 15, 2024	▾
16	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$29.83M 641,825 shares	0.01%	+28.24K(+4.60%)Added	SEC filing ↗ May 9, 2024	▾
17	Legal & General Group Plc CIK 764068 · Amended · View history	$28.83M 620,338 shares	0.01%	+23.40K(+3.90%)Added	SEC filing ↗ May 29, 2025	▾
18	NORGES BANK CIK 1374170 · Amended · View history	$27.01M 581,016 shares	0.00%	+29.37K(+5.30%)Added	SEC filing ↗ May 14, 2024	▾
19	Bank of New York Mellon Corp CIK 1390777 · View history	$26.10M 561,532 shares	0.01%	-60.02K(-9.70%)Reduced	SEC filing ↗ Apr 25, 2024	▾
20	Triodos Investment Management BV CIK 1748729 · View history	$20.82M 448,000 shares	1.88%	+448.00KNew	SEC filing ↗ May 13, 2024	▾

Showing 20 / 274 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

274

Cancelled or null records excluded

Disclosed shares

48,837,390

Not deduplicated across managers

Disclosed value

$2.27B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

CALIFORNIA WATER SERVICE GROUP · Q1 2024

Explore all 274 reporting institutions.

This page includes 20 of 274 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.