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 337 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 2012383 · View history	$479.47M 10,448,234 shares	0.01%	+79.02K(+0.80%)Added	SEC filing ↗ Nov 12, 2025	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$335.56M 7,312,302 shares	0.01%	-64.22K(-0.90%)Reduced	SEC filing ↗ Nov 7, 2025	▾
03	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$151.48M 3,300,909 shares	0.09%	+24.49K(+0.70%)Added	SEC filing ↗ Nov 14, 2025	▾
04	STATE STREET CORP CIK 93751 · View history	$142.30M 3,101,001 shares	0.00%	-82.34K(-2.60%)Reduced	SEC filing ↗ Nov 14, 2025	▾
05	Amundi CIK 1330387 · View history	$104.32M 2,276,599 shares	0.03%	+369.43K(+19.40%)Added	SEC filing ↗ Nov 14, 2025	▾
06	NUANCE INVESTMENTS, LLC CIK 1473182 · View history	$80.97M 1,764,459 shares	8.24%	+35.84K(+2.10%)Added	SEC filing ↗ Nov 6, 2025	▾
07	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$65.00M 1,416,337 shares	0.00%	-797(-0.10%)Reduced	SEC filing ↗ Nov 12, 2025	▾
08	FIRST TRUST ADVISORS LP CIK 1125816 · View history	$64.44M 1,404,320 shares	0.05%	+59.40K(+4.40%)Added	SEC filing ↗ Nov 12, 2025	▾
09	FMR LLC CIK 315066 · View history	$64.39M 1,403,132 shares	0.00%	+350.54K(+33.30%)Added	SEC filing ↗ Nov 13, 2025	▾
10	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$52.73M 1,149,018 shares	0.01%	-8.99K(-0.80%)Reduced	SEC filing ↗ Nov 12, 2025	▾
11	Invesco Ltd. CIK 914208 · View history	$41.17M 897,064 shares	0.01%	-23.65K(-2.60%)Reduced	SEC filing ↗ Nov 13, 2025	▾
12	MORGAN STANLEY CIK 895421 · Amended · View history	$36.81M 802,125 shares	0.00%	-57.37K(-6.70%)Reduced	SEC filing ↗ May 27, 2026	▾
13	Legal & General Group Plc CIK 764068 · View history	$34.89M 760,261 shares	0.01%	+53.90K(+7.60%)Added	SEC filing ↗ Nov 13, 2025	▾
14	CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC CIK 1033984 · View history	$33.51M 730,263 shares	0.48%	-21.72K(-2.90%)Reduced	SEC filing ↗ Nov 13, 2025	▾
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$32.97M 718,555 shares	0.01%	-8.76K(-1.20%)Reduced	SEC filing ↗ Nov 10, 2025	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$30.07M 655,254 shares	0.00%	-58.13K(-8.10%)Reduced	SEC filing ↗ Nov 14, 2025	▾
17	Bank of New York Mellon Corp CIK 1390777 · View history	$26.10M 568,803 shares	0.00%	-29.00K(-4.90%)Reduced	SEC filing ↗ Nov 3, 2025	▾
18	Triodos Investment Management BV CIK 1748729 · View history	$22.62M 493,000 shares	1.64%	0(0.00%)Unchanged	SEC filing ↗ Nov 10, 2025	▾
19	KBC Group NV CIK 1411133 · View history	$20.50M 446,627 shares	0.05%	-116.71K(-20.70%)Reduced	SEC filing ↗ Jan 20, 2026	▾
20	Beck Bode, LLC CIK 1790548 · View history	$18.46M 402,261 shares	2.98%	+5.86K(+1.50%)Added	SEC filing ↗ Nov 14, 2025	▾

Showing 20 / 337 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

337

Cancelled or null records excluded

Disclosed shares

50,082,136

Not deduplicated across managers

Disclosed value

$2.30B

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 · Q3 2025

Explore all 337 reporting institutions.

This page includes 20 of 337 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.