California Water Service Group (CWT) Insider Trading

Last 12 months

Insiders bought $24k and sold $664k on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. Director Thomas M Krummel sold $186k on Aug 13, 16% of their stake, outside a plan.

Net open-market

−$641k

1 buy · 7 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

1 / 5

executives and directors

Last open-market buy

Dec 2025

Dec 10, 2025

Get an email when CWT's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Sep 1	Lester A Snow Director	SoldNo plan	500	$50.21	$25k	2.7%	Form 4
Aug 13	Thomas M Krummel Director	SoldNo plan	3,700	$50.37	$186k	16%	Form 4
May 27	Lester A Snow Director	SoldNo plan	1,100	$44.00	$48k	5.7%	Form 4
May 21	Thomas M Krummel Director	SoldNo plan	3,700	$43.30	$160k	13%	Form 4
Mar 20	Michael B Luu Sr. VP Corp Svcs & Chief Risk	SoldNo plan	740	$44.53	$33k	3.0%	Form 4
Mar 20	Michael S Mares Jr Vice President, Operations	SoldNo plan	3,892	$44.00	$171k	31%	Form 4
Dec 23, 2025	Michelle R Mortensen VP, Corp Sec &Chief of Staff	SoldNo plan	924	$43.34	$40k	7.4%	Form 4
Dec 10, 2025	James Patrick Lynch SVP CFO and Treasurer	Bought	550	$42.80	$24k	14%	Form 4
Jun 12, 2025	Lester A Snow Director	SoldNo plan	1,200	$46.51	$56k	4.4%	Form 4
Nov 22, 2024	Michael B Luu Sr. VP Corp Svcs & Chief Risk	SoldNo plan	985	$51.50	$51k	4.6%	Form 4

Sep 1No plan
Lester A Snow
Director · sold 500 at $50.21
$25k
2.7% of stake
Aug 13No plan
Thomas M Krummel
Director · sold 3,700 at $50.37
$186k
16% of stake
May 27No plan
Lester A Snow
Director · sold 1,100 at $44.00
$48k
5.7% of stake
May 21No plan
Thomas M Krummel
Director · sold 3,700 at $43.30
$160k
13% of stake
Mar 20No plan
Michael B Luu
Sr. VP Corp Svcs & Chief Risk · sold 740 at $44.53
$33k
3.0% of stake
Mar 20No plan
Michael S Mares Jr
Vice President, Operations · sold 3,892 at $44.00
$171k
31% of stake
Dec 23, 2025No plan
Michelle R Mortensen
VP, Corp Sec &Chief of Staff · sold 924 at $43.34
$40k
7.4% of stake
Dec 10, 2025
James Patrick Lynch
SVP CFO and Treasurer · bought 550 at $42.80
$24k
14% of stake
Jun 12, 2025No plan
Lester A Snow
Director · sold 1,200 at $46.51
$56k
4.4% of stake
Nov 22, 2024No plan
Michael B Luu
Sr. VP Corp Svcs & Chief Risk · sold 985 at $51.50
$51k
4.6% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch CWT, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in CWT's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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