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California Water Service
CWT

330 hedge funds and large institutions have $2.17B invested in California Water Service in 2025 Q4 according to their latest regulatory filings, with 38 funds opening new positions, 98 increasing their positions, 130 reducing their positions, and 38 closing their positions.

New
Increased
Maintained
Reduced
Closed

35,000% more call options, than puts

Call options by funds: $3.16M | Put options by funds: $9K

0.04% more ownership

Funds ownership: 84.06% → 84.1% (+0.04%)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

0% more first-time investments, than exits

New positions opened: 38 | Existing positions closed: 38

2% less funds holding

Funds holding: 337 → 330 (-7)

6% less capital invested

Capital invested by funds: $2.3B → $2.17B (-$126M)

25% less repeat investments, than reductions

Existing positions increased: 98 | Existing positions reduced: 130

Holders
330
Holders Change
-7
Holders Change %
-2.08%
% of All Funds
4.01%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
38
Increased
98
Reduced
130
Closed
38
Calls
$3.16M
Puts
$9K
Net Calls
+$3.15M
Net Calls Change
-$258K

Top Buyers

1
Amundi
Amundi
France
+$21.1M
2
Fidelity Investments
Fidelity Investments
Massachusetts
+$17.9M
3
ECM
ExodusPoint Capital Management
New York
+$10.9M
4
BlackRock
BlackRock
New York
+$10.6M
5
Citadel Advisors
Citadel Advisors
Florida
+$7.24M

Top Sellers

1
Millennium Management
Millennium Management
New York
-$12.7M
2
Renaissance Technologies
Renaissance Technologies
New York
-$8.63M
3
American Century Companies
American Century Companies
Missouri
-$4.55M
4
NAAA
New Age Alpha Advisors
New York
-$4.34M
5
TIM
Triodos Investment Management
Netherlands
-$3.6M
Name Holding Trade Value Shares
Change 		Change in
Stake
GF
76
Gabelli Funds
New York
$1.87M – – –
A
77
AlphaQuest
New York
$1.87M +$512K +11,233 +35%
Mirae Asset Global ETFs Holdings
78
Mirae Asset Global ETFs Holdings
Hong Kong
$1.87M +$60.9K +1,335 +3%
Thrivent Financial for Lutherans
79
Thrivent Financial for Lutherans
Minnesota
$1.85M -$92.9K -2,037 -5%
Point72 Asset Management
80
Point72 Asset Management
Connecticut
$1.74M +$1.83M +40,192 New
SG Americas Securities
81
SG Americas Securities
New York
$1.73M -$230K -5,051 -11%
BCC
82
Bridge City Capital
Oregon
$1.67M -$287K -6,302 -14%
ZP
83
Zimmer Partners
New York
$1.67M +$1.76M +38,500 New
Zurich Cantonal Bank
84
Zurich Cantonal Bank
Switzerland
$1.62M +$87.3K +1,914 +5%
NIA
85
NIA Impact Advisors
California
$1.61M -$18K -395 -1%
XT
86
XTX Topco
Cayman Islands
$1.6M +$1.68M +36,819 New
Universal-Beteiligungs- und Servicegesellschaft
87
Universal-Beteiligungs- und Servicegesellschaft
Germany
$1.55M +$1.05M +23,100 +184%
CP
88
CenterBook Partners
Connecticut
$1.48M +$624K +13,678 +66%
HF
89
HRT Financial
New York
$1.48M +$602K +13,210 +63%
State of Wisconsin Investment Board
90
State of Wisconsin Investment Board
Wisconsin
$1.47M -$103K -2,268 -6%
IMRF
91
Illinois Municipal Retirement Fund
Illinois
$1.47M +$106K +2,329 +7%
Macquarie Group
92
Macquarie Group
Australia
$1.46M -$6.61K -145 -0.4%
Vontobel Holding
93
Vontobel Holding
Switzerland
$1.46M +$268K +5,873 +21%
MIM
94
MetLife Investment Management
New Jersey
$1.44M -$49.5K -1,085 -3%
Canada Pension Plan Investment Board
95
Canada Pension Plan Investment Board
Ontario, Canada
$1.42M +$315K +6,900 +27%
SOADOR
96
State of Alaska Department of Revenue
Alaska
$1.39M +$17.1K +376 +1%
CM
97
CoreCommodity Management
Connecticut
$1.37M +$278K +6,104 +24%
BNP Paribas Financial Markets
98
BNP Paribas Financial Markets
France
$1.37M -$1M -22,034 -41%
New York State Common Retirement Fund
99
New York State Common Retirement Fund
New York
$1.32M – – –
SDIC
100
South Dakota Investment Council
South Dakota
$1.3M +$638K +14,000 +88%
2 3
4
5 6

CWT Hedge Fund Activity: Q4 2025 in Review

330 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in California Water Service (CWT) for Q4 2025, worth a combined $2.17B — down 5.5% from $2.3B a quarter earlier.

Fund positioning in CWT was balanced in Q4 2025: 38 funds opened new positions, 38 closed out, 98 added to existing stakes and 130 trimmed.

The largest buyer was Amundi, adding an estimated $21.1M. The largest seller was Millennium Management, cutting an estimated $12.7M.

  • 330 institutional investors held California Water Service (CWT) as of Q4 2025, down from 337 in Q3 2025.
  • Funds reported $2.17B of California Water Service stock for Q4 2025, down 5.5% quarter-over-quarter.
  • 38 funds opened new California Water Service positions in Q4 2025 and 38 closed out, a net change of 0 holders.
  • The largest California Water Service buyer in Q4 2025 was Amundi, an estimated $21.1M added.
  • The largest California Water Service seller in Q4 2025 was Millennium Management, an estimated $12.7M sold.

Based on aggregated 13F filings for Q4 2025.