Ken Griffin
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Ken Griffin’s California Water Service CWT Stock Holding History

Ken Griffin’s Portfolio CWT Stock Details CWT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-9,000
Closed -$436K – 12944
2025
Q1 		$436K Buy
9,000
+6,600
+275% +$300K ﹤0.01% 8774
2024
Q4 		$109K Sell
2,400
-1,300
-35% -$65.6K ﹤0.01% 11359
2024
Q3 		$201K Sell
3,700
-5,100
-58% -$270K ﹤0.01% 10148
2024
Q2 		$427K Sell
8,800
-900
-9% -$43.7K ﹤0.01% 8386
2024
Q1 		$451K Buy
9,700
+6,600
+213% +$309K ﹤0.01% 8617
2023
Q4 		$161K Buy
3,100
+1,100
+55% +$55.3K ﹤0.01% 10277
2023
Q3 		$94.6K Sell
2,000
-6,700
-77% -$339K ﹤0.01% 10967
2023
Q2 		$449K Buy
8,700
+1,500
+21% +$84.2K ﹤0.01% 8182
2023
Q1 		$419K Buy
7,200
+6,400
+800% +$380K ﹤0.01% 8667
2022
Q4 		$48.5K Buy
+800
New +$48.1K ﹤0.01% 12181
2022
Q2 		– Sell
-4,300
Closed -$255K – 13036
2022
Q1 		$255K Buy
+4,300
New +$259K ﹤0.01% 10953
2020
Q3 		– Sell
-7,400
Closed -$353K – 10155
2020
Q2 		$353K Sell
7,400
-2,600
-26% -$123K ﹤0.01% 7651
2020
Q1 		$503K Buy
+10,000
New +$519K ﹤0.01% 6457
2019
Q3 		– Sell
-7,700
Closed -$390K – 9242
2019
Q2 		$390K Buy
7,700
+4,000
+108% +$201K ﹤0.01% 7184
2019
Q1 		$201K Buy
+3,700
New +$186K ﹤0.01% 8203
2018
Q3 		– Sell
-5,500
Closed -$214K – 9268
2018
Q2 		$214K Buy
+5,500
New +$215K ﹤0.01% 7777
2016
Q1 		– Sell
-3,000
Closed -$70K – 6963
2015
Q4 		$70K Buy
3,000
+400
+15% +$9.09K ﹤0.01% 7034
2015
Q3 		$58K Buy
2,600
+300
+13% +$6.56K ﹤0.01% 7466
2015
Q2 		$53K Buy
2,300
+2,200
+2,200% +$52.8K ﹤0.01% 7608
2015
Q1 		$2K Sell
100
-100
-50% -$2.47K ﹤0.01% 8405
2014
Q4 		$5K Buy
+200
New +$4.9K ﹤0.01% 8266

Other funds holding CWT

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Amundi
Amundi Paris, France $413B AUM 44.57% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
NI
Nuance Investments Kansas City, Missouri $588M AUM 6.93% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return

Ken Griffin's CWT Position: Q1 2026 in Review

Ken Griffin reduced its California Water Service (CWT) stake by 80% in Q1 2026, selling an estimated $6.19M and leaving 34,698 shares worth $1.57M. The position accounts for ﹤0.01% of the portfolio, ranked #6609.

Ken Griffin first reported a position in CWT in Q4 2013 and has held it in 31 quarters since. The position peaked at $20.3M in Q3 2024. 339 funds tracked by Wall St. Rank hold CWT as of Q1 2026.

  • Ken Griffin held 34,698 shares of California Water Service worth $1.57M as of Q1 2026.
  • Ken Griffin sold 138,032 California Water Service shares in Q1 2026, an estimated $6.19M.
  • California Water Service made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #6609 holding.
  • Ken Griffin first reported a position in California Water Service in Q4 2013 and has held it in 31 quarters since.
  • Ken Griffin's California Water Service position peaked at $20.3M in Q3 2024.
  • 339 funds tracked by Wall St. Rank held California Water Service as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.