We are live on ! Find out more
CWT icon

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
SM
176
Sciencast Management
New Jersey
$382K +$402K +8,815 New
SFG
177
Sovereign Financial Group
Connecticut
$381K -$2.37K -52 -0.6%
QC
178
Quadrature Capital
United Kingdom
$365K +$53.9K +1,182 +16%
ET
179
Entropy Technologies
New York
$358K +$90.5K +1,984 +32%
GAA
180
Green Alpha Advisors
Colorado
$353K +$31.9K +700 +9%
MM
181
MQS Management
New York
$336K +$79.5K +1,743 +29%
Public Employees Retirement Association of Colorado
182
Public Employees Retirement Association of Colorado
Colorado
$335K – – –
BC
183
Blackhill Capital
New Jersey
$329K – – –
SIS
184
Sound Income Strategies
Florida
$329K – – –
GT
185
Glenmede Trust
Pennsylvania
$329K +$346K +7,590 New
Baird Financial Group
186
Baird Financial Group
Wisconsin
$322K +$59.5K +1,304 +21%
CCM
187
Cullen Capital Management
New York
$309K -$245K -5,362 -43%
WA
188
Wealth Architects
California
$306K -$7.93K -174 -2%
SO
189
STRS Ohio
Ohio
$299K – – –
KF
190
Ketron Financial
California
$299K +$315K +6,900 New
DZ Bank
191
DZ Bank
Germany
$296K – – –
MOACM
192
Mutual of America Capital Management
New York
$295K +$6.25K +137 +2%
PA
193
PharVision Advisers
Florida
$293K +$308K +6,756 New
MCM
194
Maple Capital Management
Vermont
$289K – – –
PI
195
PFG Investments
New York
$287K +$2.87K +63 +1%
HCM
196
Hutchinson Capital Management
California
$286K – – –
SOAMC
197
Spirit of America Management Corp
New York
$282K – – –
EM
198
ELCO Management
New York
$280K -$67.5K -1,480 -19%
AG
199
Algert Global
California
$271K – – –
TPWA
200
TRUE Private Wealth Advisors
Oregon
$269K -$45.6K -1,000 -14%
6 7
8
9 10

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.