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California Water Service

337 hedge funds and large institutions have $2.32B invested in California Water Service in 2026 Q1 according to their latest regulatory filings, with 45 funds opening new positions, 140 increasing their positions, 88 reducing their positions, and 32 closing their positions.

New
Increased
Maintained
Reduced
Closed

59% more repeat investments, than reductions

Existing positions increased: 140 | Existing positions reduced: 88

41% more first-time investments, than exits

New positions opened: 45 | Existing positions closed: 32

7% more capital invested

Capital invested by funds: $2.17B → $2.32B (+$153M)

2% more funds holding

Funds holding: 330337 (+7)

1.93% more ownership

Funds ownership: 84.1%86.03% (+1.9%)

0% more funds holding in top 10

Funds holding in top 10: 11 (0)

61% less call options, than puts

Call options by funds: $32K | Put options by funds: $82K

Holders
337
Holders Change
+7
Holders Change %
+2.12%
% of All Funds
4.15%
Holding in Top 10
1
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
0.01%
New
45
Increased
140
Reduced
88
Closed
32
Calls
$32K
Puts
$82K
Net Calls
-$50K
Net Calls Change
-$3.2M
Name Holding Trade Value Shares
Change
Change in
Stake
Principal Financial Group
26
Principal Financial Group
Iowa
$13.1M +$251K +5,600 +2%
Goldman Sachs
27
Goldman Sachs
New York
$12.9M +$2.59M +57,686 +25%
American Century Companies
28
American Century Companies
Missouri
$11.8M +$5.98M +133,242 +104%
Arrowstreet Capital
29
Arrowstreet Capital
Massachusetts
$11.7M +$9.33M +208,061 +417%
Marshall Wace
30
Marshall Wace
United Kingdom
$11.6M +$11.5M +256,767 New
UBS AM
31
UBS AM
Illinois
$10.6M +$4.04K +90 +0%
Public Sector Pension Investment Board (PSP Investments)
32
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$9.66M +$313K +6,969 +3%
Qube Research & Technologies (QRT)
33
Qube Research & Technologies (QRT)
United Kingdom
$8.48M +$7.93M +176,835 +1,752%
UBS Group
34
UBS Group
Switzerland
$8.43M -$1.28M -28,453 -13%
RhumbLine Advisers
35
RhumbLine Advisers
Massachusetts
$7.91M +$32.8K +732 +0.4%
AQR Capital Management
36
AQR Capital Management
Connecticut
$7.7M +$4.87M +108,592 +178%
JP Morgan Chase
37
JP Morgan Chase
New York
$6.96M -$3.36M -74,799 -33%
ProShare Advisors
38
ProShare Advisors
Maryland
$6.89M +$63.8K +1,423 +0.9%
Mariner
39
Mariner
Kansas
$6.27M +$2.29M +51,134 +59%
Ameriprise
40
Ameriprise
Minnesota
$6.17M -$492K -10,959 -7%
MYAM
41
Meiji Yasuda Asset Management
Japan
$6.08M +$2.21M +49,317 +58%
Federated Hermes
42
Federated Hermes
Pennsylvania
$5.86M +$322K +7,171 +6%
Jane Street
43
Jane Street
New York
$5.59M +$3.58M +79,894 +184%
Bank of America
44
Bank of America
North Carolina
$5.53M +$1.02M +22,825 +23%
Swiss National Bank
45
Swiss National Bank
Switzerland
$5.33M
COPPSERS
46
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$4.8M -$278K -6,192 -6%
MAM
47
Martingale Asset Management
Massachusetts
$4.71M +$1.01M +22,533 +28%
CIC
48
Crawford Investment Counsel
Georgia
$4.67M +$493K +11,000 +12%
Renaissance Technologies
49
Renaissance Technologies
New York
$4.55M -$516K -11,500 -10%
Deutsche Bank
50
Deutsche Bank
Germany
$4.33M +$378K +8,427 +10%