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CWT Insider Trading

Insider Ownership Percentage: 0.78%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $260,012.20

California Water Service Group Insider Trading History Chart

This chart shows the insider buying and selling history at California Water Service Group by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

California Water Service Group Share Price & Price History

Current Price: $43.28
Price Change: ▲ Price Increase of +0.374 (0.87%)
As of 05/20/2026 03:59 PM ET

This chart shows the closing price history over time for CWT up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

California Water Service Group Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
3/20/2026Michael B. LuuVPSell740$44.53$32,952.2023,655View SEC Filing Icon  
3/20/2026Michael S. Mares, Jr.VPSell3,892$44.00$171,248.008,525View SEC Filing Icon  
6/12/2025Lester A. SnowDirectorSell1,200$46.51$55,812.0026,349View SEC Filing Icon  
11/22/2024Michael B. LuuVPSell985$51.50$50,727.5020,354View SEC Filing Icon  
9/4/2024Thomas M. KrummelDirectorSell555$55.09$30,574.9521,951View SEC Filing Icon  
8/21/2024Thomas M. KrummelDirectorSell555$54.33$30,153.1522,506View SEC Filing Icon  
8/7/2024Thomas M. KrummelDirectorSell555$52.91$29,365.0523,061View SEC Filing Icon  
7/17/2024Thomas M. KrummelDirectorSell555$52.99$29,409.4523,616View SEC Filing Icon  
7/11/2024Thomas M. KrummelDirectorSell1,654$50.07$82,815.7824,171View SEC Filing Icon  
5/15/2024Thomas M. KrummelDirectorSell555$53.26$29,559.3023,318View SEC Filing Icon  
5/1/2024Thomas M. KrummelDirectorSell2,220$50.00$111,000.0023,873View SEC Filing Icon  
1/3/2024Thomas M. KrummelDirectorSell555$51.90$28,804.5026,066View SEC Filing Icon  
12/20/2023Thomas M. KrummelDirectorSell555$53.45$29,664.7526,621View SEC Filing Icon  
12/12/2023Michelle R. MortensenInsiderSell675$52.56$35,478.008,983View SEC Filing Icon  
11/15/2023Thomas M. KrummelDirectorSell555$51.77$28,732.3527,731View SEC Filing Icon  
11/2/2023Thomas M. KrummelDirectorSell2,220$50.00$111,000.0028,286View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for California Water Service Group (NYSE:CWT)

82.78% of California Water Service Group stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at CWT by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

California Water Service Group Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/19/2026Bank of America Corp DE121,899$5.53M0.0%+23.0%0.204%Search for SEC Filing on Google Icon
5/19/2026South Dakota Investment Council34,715$1.57M0.0%+16.0%0.058%Search for SEC Filing on Google Icon
5/18/2026Amundi3,470,997$157.42M0.0%+26.7%5.799%Search for SEC Filing on Google Icon
5/18/2026EverSource Wealth Advisors LLC1,209$55K0.0%+100.5%0.002%Search for SEC Filing on Google Icon
5/18/2026California State Teachers Retirement System56,273$2.55M0.0%-0.8%0.094%Search for SEC Filing on Google Icon
5/18/2026Royal Bank of Canada11,206$0.51M0.0%-14.8%0.019%Search for SEC Filing on Google Icon
5/16/2026The Manufacturers Life Insurance Company 26,383$1.20M0.0%-3.4%0.044%Search for SEC Filing on Google Icon
5/16/2026Quantinno Capital Management LP14,895$0.68M0.0%+13.2%0.025%Search for SEC Filing on Google Icon
5/16/2026Lazard Asset Management LLC5,630$0.26M0.0%N/A0.009%Search for SEC Filing on Google Icon
5/14/2026Healthcare of Ontario Pension Plan Trust Fund16,472$0.75M0.0%-24.0%0.028%Search for SEC Filing on Google Icon
5/14/2026Renaissance Technologies LLC100,400$4.55M0.0%-10.3%0.168%Search for SEC Filing on Google Icon
5/14/2026Arrowstreet Capital Limited Partnership257,970$11.70M0.0%+416.9%0.431%Search for SEC Filing on Google Icon
5/14/2026Inceptionr LLC4,947$0.22M0.1%N/A0.008%Search for SEC Filing on Google Icon
5/14/2026Sei Investments Co.52,883$2.40M0.0%+129.1%0.088%Search for SEC Filing on Google Icon
5/14/2026State of Wyoming1,553$70K0.0%N/A0.003%Search for SEC Filing on Google Icon
5/13/2026Cetera Investment Advisers13,714$0.62M0.0%+5.9%0.023%Search for SEC Filing on Google Icon
5/13/2026First Trust Advisors LP1,354,165$61.40M0.0%-1.0%2.262%Search for SEC Filing on Google Icon
5/12/2026Magellan Asset Management Ltd61,416$2.79M0.0%+26.0%0.103%Search for SEC Filing on Google Icon
5/8/2026PNC Financial Services Group Inc.5,392$0.24M0.0%+9.1%0.009%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP1,158,359$52.52M0.0%+0.4%1.935%Search for SEC Filing on Google Icon
5/7/2026KBC Group NV577,247$26.17M0.1%+29.2%0.964%Search for SEC Filing on Google Icon
5/7/2026Arjuna Capital28,638$1.30M0.3%+2.1%0.048%Search for SEC Filing on Google Icon
5/6/2026Bessemer Group Inc.744$34K0.0%+67.9%0.001%Search for SEC Filing on Google Icon
5/6/2026Allspring Global Investments Holdings LLC19,360$0.88M0.0%+11.5%0.032%Search for SEC Filing on Google Icon
5/5/2026D.A. Davidson & CO.10,894$0.49M0.0%+3.9%0.018%Search for SEC Filing on Google Icon
5/5/2026Bank of New York Mellon Corp506,702$22.97M0.0%+0.4%0.847%Search for SEC Filing on Google Icon
5/5/2026Illinois Municipal Retirement Fund30,703$1.39M0.0%-9.3%0.051%Search for SEC Filing on Google Icon
5/5/2026Maryland State Retirement & Pension System61,780$2.80M0.1%-4.2%0.103%Search for SEC Filing on Google Icon
5/4/2026Principal Financial Group Inc.289,623$13.13M0.0%+2.0%0.484%Search for SEC Filing on Google Icon
5/1/2026Commonwealth of Pennsylvania Public School Empls Retrmt SYS105,960$4.80M0.0%-5.5%0.177%Search for SEC Filing on Google Icon
5/1/2026Midwest Trust Co52,833$2.40M0.0%-2.9%0.088%Search for SEC Filing on Google Icon
5/1/2026Fifth Third Bancorp29,884$1.36M0.0%+9,095.1%0.050%Search for SEC Filing on Google Icon
5/1/2026Kornitzer Capital Management Inc. KS42,500$1.93M0.0%N/A0.071%Search for SEC Filing on Google Icon
4/29/2026Canvas Wealth Advisors LLC22,624$1.03M0.2%-2.0%0.038%Search for SEC Filing on Google Icon
4/28/2026Praxis Investment Management Inc.7,671$0.35M0.0%+35.1%0.013%Search for SEC Filing on Google Icon
4/27/2026Fideuram Intesa Sanpaolo Private Banking S.P.A.51,806$2.35M0.1%-4.8%0.087%Search for SEC Filing on Google Icon
4/24/2026IFM Investors Pty Ltd4,268$0.19M0.0%N/A0.007%Search for SEC Filing on Google Icon
4/22/2026Pictet Asset Management Holding SA11,184$0.51M0.0%+11.6%0.019%Search for SEC Filing on Google Icon
4/22/2026Sterling Capital Management LLC1,982$90K0.0%-42.7%0.003%Search for SEC Filing on Google Icon
4/21/2026Louisiana State Employees Retirement System26,400$1.20M0.0%N/A0.044%Search for SEC Filing on Google Icon
4/16/2026SG Americas Securities LLC44,335$2.01M0.0%+11.3%0.074%Search for SEC Filing on Google Icon
3/20/2026Hsbc Holdings PLC13,298$0.57M0.0%N/A0.022%Search for SEC Filing on Google Icon
3/17/2026Rockefeller Capital Management L.P.1,370$59K0.0%-16.6%0.002%Search for SEC Filing on Google Icon
2/24/2026Ketron Financial6,900$0.30M0.1%N/A0.012%Search for SEC Filing on Google Icon
2/19/2026T. Rowe Price Investment Management Inc.3,337,205$144.60M0.1%+1.1%5.600%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.954,234$41.35M0.0%+6.4%1.601%Search for SEC Filing on Google Icon
2/18/2026Mercer Global Advisors Inc. ADV13,092$0.57M0.0%-73.6%0.022%Search for SEC Filing on Google Icon
2/18/2026Virtue Capital Management LLC4,733$0.20M0.0%N/A0.008%Search for SEC Filing on Google Icon
2/18/2026State of Tennessee Department of Treasury12,535$0.56M0.0%-25.0%0.021%Search for SEC Filing on Google Icon
2/18/2026Mackenzie Financial Corp15,634$0.68M0.0%+4.2%0.026%Search for SEC Filing on Google Icon
2/18/2026XTX Topco Ltd36,819$1.60M0.0%N/A0.062%Search for SEC Filing on Google Icon
2/18/2026Zimmer Partners LP38,500$1.67M0.0%N/A0.065%Search for SEC Filing on Google Icon
2/18/2026Quadrature Capital Ltd8,413$0.37M0.0%+16.3%0.014%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC90,157$3.91M0.0%-75.5%0.151%Search for SEC Filing on Google Icon
2/18/2026Engineers Gate Manager LP20,821$0.90M0.0%+43.0%0.035%Search for SEC Filing on Google Icon
2/17/2026Freestone Grove Partners LP18,642$0.81M0.0%-54.5%0.031%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC61,139$2.65M0.0%-46.4%0.103%Search for SEC Filing on Google Icon
2/17/2026Cetera Investment Advisers12,953$0.56M0.0%-27.2%0.022%Search for SEC Filing on Google Icon
2/17/2026Trexquant Investment LP135,592$5.88M0.1%+102.7%0.228%Search for SEC Filing on Google Icon
2/17/2026Amundi2,738,993$118.63M0.0%+20.3%4.596%Search for SEC Filing on Google Icon
2/17/2026Sciencast Management LP8,815$0.38M0.1%N/A0.015%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD74,380$3.22M0.0%-50.9%0.125%Search for SEC Filing on Google Icon
2/17/2026T. Rowe Price Investment Management Inc.721,461$31.26M0.0%-78.1%1.211%Search for SEC Filing on Google Icon
2/17/2026Osaic Holdings Inc.5,880$0.26M0.0%-14.9%0.010%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.5,358$0.23M0.0%-14.4%0.009%Search for SEC Filing on Google Icon
2/17/2026Maryland State Retirement & Pension System64,497$2.80M0.1%+1.1%0.108%Search for SEC Filing on Google Icon
2/17/2026Crawford Investment Counsel Inc.91,989$3.99M0.1%+2.2%0.154%Search for SEC Filing on Google Icon
2/17/2026State of Wisconsin Investment Board33,894$1.47M0.0%-6.3%0.057%Search for SEC Filing on Google Icon
2/17/2026Captrust Financial Advisors9,379$0.41M0.0%-7.9%0.016%Search for SEC Filing on Google Icon
2/17/2026ExodusPoint Capital Management LP238,840$10.35M0.1%N/A0.401%Search for SEC Filing on Google Icon
2/17/2026Royal Bank of Canada13,146$0.57M0.0%-75.6%0.022%Search for SEC Filing on Google Icon
2/16/2026Mariner LLC87,097$3.77M0.0%-9.0%0.146%Search for SEC Filing on Google Icon
2/16/2026Maven Securities LTD27,611$1.20M0.0%+1.8%0.046%Search for SEC Filing on Google Icon
2/16/2026Healthcare of Ontario Pension Plan Trust Fund21,687$0.94M0.0%-33.9%0.036%Search for SEC Filing on Google Icon
2/16/2026Kennedy Capital Management LLC28,915$1.25M0.0%-49.8%0.049%Search for SEC Filing on Google Icon
2/16/2026Entropy Technologies LP8,253$0.36M0.0%+31.6%0.014%Search for SEC Filing on Google Icon
2/16/2026Arax Advisory Partners591$26K0.0%-87.0%0.001%Search for SEC Filing on Google Icon
2/16/2026Barclays PLC122,521$5.31M0.0%+11.5%0.206%Search for SEC Filing on Google Icon
2/16/2026Bridge City Capital LLC38,576$1.67M0.5%-14.0%0.065%Search for SEC Filing on Google Icon
2/16/2026Aptus Capital Advisors LLC179,202$7.77M0.1%+0.4%0.301%Search for SEC Filing on Google Icon
2/13/2026The Manufacturers Life Insurance Company 27,307$1.18M0.0%-5.9%0.046%Search for SEC Filing on Google Icon
2/13/2026CANADA LIFE ASSURANCE Co97,181$4.21M0.0%-27.3%0.163%Search for SEC Filing on Google Icon
2/13/2026Stifel Financial Corp11,797$0.51M0.0%-4.2%0.020%Search for SEC Filing on Google Icon
2/13/2026Rodgers Brothers Inc.52,175$2.26M0.3%-9.7%0.088%Search for SEC Filing on Google Icon
2/13/2026Jacobs Levy Equity Management Inc.80,919$3.51M0.0%-3.9%0.136%Search for SEC Filing on Google Icon
2/13/2026Public Sector Pension Investment Board206,197$8.94M0.0%-11.3%0.346%Search for SEC Filing on Google Icon
2/13/2026First Trust Advisors LP1,367,978$59.27M0.0%-2.6%2.296%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.710,668$30.79M0.0%-1.1%1.193%Search for SEC Filing on Google Icon
2/13/2026State Street Corp3,029,950$131.29M0.0%-2.3%5.085%Search for SEC Filing on Google Icon
2/13/2026Van ECK Associates Corp23,105$1M0.0%+6.5%0.039%Search for SEC Filing on Google Icon
2/13/2026Vontobel Holding Ltd.33,616$1.46M0.0%+21.2%0.056%Search for SEC Filing on Google Icon
2/13/2026Martingale Asset Management L P81,447$3.53M0.1%-1.4%0.137%Search for SEC Filing on Google Icon
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC234,643$10.17M0.0%-3.0%0.394%Search for SEC Filing on Google Icon
2/13/2026Wells Fargo & Company MN98,602$4.27M0.0%+24.1%0.165%Search for SEC Filing on Google Icon
2/13/2026Cullen Capital Management LLC7,125$0.31M0.0%-42.9%0.012%Search for SEC Filing on Google Icon
2/12/2026Federation des caisses Desjardins du Quebec11,190$0.49M0.0%+24.2%0.019%Search for SEC Filing on Google Icon
2/12/2026HRT Financial LP34,201$1.48M0.0%+62.9%0.057%Search for SEC Filing on Google Icon
2/12/2026MetLife Investment Management LLC33,337$1.44M0.0%-3.2%0.056%Search for SEC Filing on Google Icon
2/12/2026Commonwealth Equity Services LLC13,729$0.60M0.0%+4.3%0.023%Search for SEC Filing on Google Icon
2/12/2026Northstar Asset Management Inc.82,861$3.59M0.9%-21.9%0.139%Search for SEC Filing on Google Icon
Data available starting January 2016

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California Water Service Group logo
California Water Service Group, through its subsidiaries, provides water utility and other related services in California, Washington, New Mexico, Hawaii, and Texas. The company is involved in the production, purchase, storage, treatment, testing, distribution, and sale of water for domestic, industrial, public, and irrigation uses, as well as for fire protection services. It offers its services to approximately 497,700 customer connections in 100 California communities; approximately 6,500 water and wastewater customer connections on the islands of Maui, Oahu, and Hawaii; approximately 38,000 customer connections in the Tacoma, Olympia, Graham, Spanaway, Puyallup, Rainier, Yelm, and Gig Harbor areas; and approximately 11,400 water and wastewater customer connections in Rio Communities, Rio Del Oro, Meadow Lake, Indian Hills, Squaw Valley, Elephant Butte, Morningstar, Sandia Knolls, Juan Tomas, and Cypress Gardens systems. The company also engages in the provision of non-regulated water-related services, including operating of municipally owned water systems, privately owned water, and recycled water distribution systems; water system operation, meter reading, and billing services to private companies and municipalities; leasing of communication antenna sites on its properties; and billing of optional third-party insurance programs to its residential customers. In addition, it provides lab, wastewater collection, and treatment services. California Water Service Group was founded in 1926 and is headquartered in San Jose, California.
Read More on California Water Service Group

Today's Range

Now: $43.28
Low: $42.71
High: $43.36

50 Day Range

MA: $44.80
Low: $42.27
High: $47.54

52 Week Range

Now: $43.28
Low: $41.29
High: $50.44

Volume

485,879 shs

Average Volume

445,588 shs

Market Capitalization

$2.59 billion

P/E Ratio

21.64

Dividend Yield

3.13%

Beta

0.51

Who are the company insiders with the largest holdings of California Water Service Group?

California Water Service Group's top insider investors include:
  1. Richard P Magnuson (Director)
  2. Martin Kropelnicki (CEO)
  3. George A Vera (Director)
  4. Lester A Snow (Director)
  5. Peter C Nelson (Director)
  6. Thomas M Krummel (Director)
  7. Michael B Luu (VP)
  8. Lynne P Mcghee (VP)
  9. Lynne Mcghee (Insider)
  10. David B Healey (VP)
Learn More about top insider investors at California Water Service Group.

Who are the major institutional investors of California Water Service Group?

California Water Service Group's top institutional shareholders include:
  1. Amundi — 5.80%
  2. First Trust Advisors LP — 2.26%
  3. Dimensional Fund Advisors LP — 1.94%
  4. KBC Group NV — 0.96%
  5. Bank of New York Mellon Corp — 0.85%
  6. Principal Financial Group Inc. — 0.48%
Learn More about top institutional investors of California Water Service Group stock.

Which major investors are selling California Water Service Group stock?

During the previous quarter, CWT stock was sold by these institutional investors:
  1. First Trust Advisors LP
  2. Renaissance Technologies LLC
  3. Commonwealth of Pennsylvania Public School Empls Retrmt SYS
  4. Healthcare of Ontario Pension Plan Trust Fund
  5. Illinois Municipal Retirement Fund
  6. Maryland State Retirement & Pension System
  7. Fideuram Intesa Sanpaolo Private Banking S.P.A.
  8. Royal Bank of Canada
During the last year, company insiders that have sold California Water Service Group company stock include:
  1. Lester A Snow (Director)
  2. Michael B Luu (VP)
  3. Michael S Mares Jr (VP)
Learn More investors selling California Water Service Group stock.

Which major investors are buying California Water Service Group stock?

During the last quarter, CWT stock was purchased by institutional investors including:
  1. Amundi
  2. Arrowstreet Capital Limited Partnership
  3. KBC Group NV
  4. Kornitzer Capital Management Inc. KS
  5. Sei Investments Co.
  6. Fifth Third Bancorp
  7. Louisiana State Employees Retirement System
  8. Bank of America Corp DE

California Water Service Group Active Insiders

Michael S Mares Jr
Michael S Mares Jr
Senior Vice President, Operations
1 recent trades
Lester A Snow
Lester A Snow
Director
Terry Bayer
Terry Bayer
Director
Thomas M Krummel
Thomas M Krummel
Director
Lynne P Mcghee
Lynne P Mcghee
VP
David B Healey (Age 70)
VP
Robert J Kuta
Robert J Kuta (Age 60)
VP
Michael B Luu
Michael B Luu (Age 46)
VP
1 recent trades
Michelle R Mortensen
Michelle R Mortensen
Insider
Gerald A Simon
Insider