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.
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: 330 → 337 (+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: 1 → 1 (0)
61% less call options, than puts
Call options by funds: $32K | Put options by funds: $82K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Amundi
Paris,
France
|
+$32.8M |
| 2 |
Morgan Stanley
New York
|
+$15.8M |
| 3 |
Marshall Wace
London,
United Kingdom
|
+$11.5M |
| 4 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$9.33M |
| 5 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
+$7.93M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$18.2M |
| 2 |
BlackRock
New York
|
-$16.7M |
| 3 |
ECM
ExodusPoint Capital Management
New York
|
-$10.3M |
| 4 |
NI
Nuance Investments
Kansas City,
Missouri
|
-$9.94M |
| 5 |
ACA
Aptus Capital Advisors
Fairhope,
Alabama
|
-$7.76M |
CWT Hedge Fund Activity: Q1 2026 in Review
337 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in California Water Service (CWT) for Q1 2026, worth a combined $2.32B — up 7% from $2.17B a quarter earlier.
Buyers outnumbered sellers: 45 funds opened new CWT positions and 32 closed out — a net gain of 13 holders — while 140 added to existing stakes and 88 trimmed.
The largest buyer was Amundi, adding an estimated $32.8M. The largest seller was Fidelity Investments, cutting an estimated $18.2M.
- 337 institutional investors held California Water Service (CWT) as of Q1 2026, up from 330 in Q4 2025.
- Funds reported $2.32B of California Water Service stock for Q1 2026, up 7% quarter-over-quarter.
- 45 funds opened new California Water Service positions in Q1 2026 and 32 closed out, a net change of +13 holders.
- The largest California Water Service buyer in Q1 2026 was Amundi, an estimated $32.8M added.
- The largest California Water Service seller in Q1 2026 was Fidelity Investments, an estimated $18.2M sold.
Based on aggregated 13F filings for Q1 2026.