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Who owns California Water Service (CWT) stock

336 funds reported California Water Service (CWT) shares in their latest 13F filings, worth $3.0B in all. The largest holder is BlackRock ($523M). Last quarter 165 funds added to their stakes and 131 cut them.

Largest holders of CWT (13F)Largest holders of CWT (13F)BlackRock$523MVanguard Group$318MVanguard Portfolio Management LLC$213MT. Rowe Price Investment Manageme…$171MState Street$159MAmundi$155MVanguard Capital Management LLC$131MAtlas Infrastructure Partners (UK)$96.6MGeode Capital Management, LLC$75.7MFirst Trust Advisors LP$63.2M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock10,755,498$523Mincrease2026-06-30
Vanguard Group7,346,457$318Mincrease2025-12-31
Vanguard Portfolio Management LLC4,379,671$213Mincrease2026-06-30
T. Rowe Price Investment Management3,517,105$171Mincrease2026-06-30
State Street3,266,850$159Mincrease2026-06-30
Amundi3,357,784$155Mdecrease2026-09-30
Vanguard Capital Management LLC2,690,663$131Mincrease2026-06-30
Atlas Infrastructure Partners (UK)1,984,605$96.6Mnew2026-06-30
Geode Capital Management, LLC1,555,391$75.7Mincrease2026-06-30
First Trust Advisors LP1,300,055$63.2Mdecrease2026-06-30
FMR LLC1,281,406$62.3Mdecrease2026-06-30
Dimensional Fund Advisors LP1,174,914$57.2Mincrease2026-06-30
Nuance Investments, LLC1,096,077$53.3Mdecrease2026-06-30
Invesco974,775$47.4Mdecrease2026-06-30
Morgan Stanley948,112$46.1Mdecrease2026-06-30

California Water Service's latest quarter

California Water Service, Q3 2026: revenue $331M (+5% year over year), operating margin 25.0%, net earnings $65.4M, operating cash flow $149M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most CWT stock?

By the latest 13F filings: BlackRock ($523M); Vanguard Group ($318M); Vanguard Portfolio Management LLC ($213M); T. Rowe Price Investment Management ($171M); State Street ($159M).

What is the short interest in CWT?

2,324,846 shares were sold short at the 2026-10-15 settlement, -6.41% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.