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California Water Service Group CWT

US equityMarket cap rank #2538
$45.84 −$0.12 (-0.26%)
Pre-market · Oct 6, 7:20 am ET · After hours $45.84 0.00%
Open$46.33
Prev close$45.96
Day range$45.17 – $46.33
Volume701.9K
Market cap$2.83B
P/E (TTM)20.6
Dividend yield2.77%

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership91.0%-0.08 pts vs. prior quarter
Institutions holding413-2 vs. prior quarter
Insider trades (recent)13 buys / 36 sellsNet selling
Short interest3.91% of floatDays to cover 4.3 · as of 15 Sep 2026
Short-sale volume share24.7%5-day average of daily volume

Short-sale volume as % of daily volume

14%22%29%36%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$386.0K (11 inflow days, 9 outflow days).

The five largest holders on file together own 41.2% of shares outstanding.

Largest holders

  • BlackRock17.39%
  • Vanguard Portfolio Management, LLC7.08%
  • T. Rowe Price Group, Inc.5.85%
  • Amundi Asset Management5.64%
  • State Street Global Advisors5.28%
  • Vanguard Capital Management, LLC4.99%
  • ATLAS Infrastructure Partners (UK) Ltd3.21%
  • Geode Capital Management, LLC2.52%

By investor type

  • Mutual Fund82.72%
  • Hedge Fund2.84%
  • Public Company2.16%
  • Government Pension Fund1.35%
  • VC/PE Fund0.81%
  • Individual/Insider0.78%
  • Private Company0.71%
  • Insurance Company0.34%

Reported short interest has risen from 3.34% to 3.91% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 2,415,232 3.9% 4.3
31 Aug 2026 2,429,274 3.9% 5.2
14 Aug 2026 1,425,414 2.3% 3.2
31 Jul 2026 1,787,198 2.9% 3.5
15 Jul 2026 2,065,904 3.5% 5.0
30 Jun 2026 1,998,391 3.3% 2.8

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