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CWT · California Water Service Group

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$50.02 +0.11 (+0.22%) At close · Aug 20
Market Cap
$3.09B
Shares
61.84M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 343
Total Value: $2,687,210,739
Total Shares: 55,235,580

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 343 13F filers · Δ vs Mar 31, 2026
Top Holder
19.5%
Sep 2023 → Jun 2026 · range 19.5% – 22.7%
−0.6 pts
Top 5
46.0%
Sep 2023 → Jun 2026 · range 46.0% – 56.5%
−2.0 pts
Top 10
61.9%
Sep 2023 → Jun 2026 · range 61.9% – 69.8%
−2.6 pts
HHI
646
Sep 2023 → Jun 2026 · range 646 – 914
Broadly held−45

Quarterly Activity

vs Mar 31, 2026
New
52
Increased
138
Decreased
98
Sold Out
48
Unchanged
55
Holder count: +4
Institutional value: +15.6%
Shares held: +7.7%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 343
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1035201 CUSIP 130788102 13F (30d) 313 filings 308 filers Visit website Investor relations