California Water director sells 3,700 company shares

California Water Service Group director Thomas M. Krummel reported an open-market sale of 3,700 shares of Common Stock.

Rhea-AI Filing Summary

California Water Service Group director Thomas M. Krummel reported an open-market sale of 3,700 shares of Common Stock. The shares were sold at a weighted average price of $43.3012 per share. After this transaction, he directly holds 23,805 shares of California Water Service Group common stock.

Insider Trade Summary

Net Seller: 3,700 shares

Net Sell 1 txn

Insider Krummel Thomas M

Role Director

Sold 3,700 shs ($160K)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,700	$43.3012	$160K

Holdings After Transaction: Common Stock — 23,805 shares (Direct)

Footnotes (1)

1. F1. This transaction was executed in multiple trades with a weighted average price of $43.3012. The reporting person hereby undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transaction was effected.

Key Figures

Shares sold: 3,700 shares Sale price: $43.3012 per share Estimated sale value: $160,214 +1 more

4 metrics

Shares sold 3,700 shares Open-market sale of Common Stock

Sale price $43.3012 per share Weighted average sale price

Estimated sale value $160,214 3,700 shares at $43.3012 per share

Shares owned after sale 23,805 shares Post-transaction direct holdings

Key Terms

Common Stock, open-market sale, weighted average price, Form 4

4 terms

Common Stock financial

"reported an open-market sale of 3,700 shares of Common Stock."

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

open-market sale financial

"reported an open-market sale of 3,700 shares of Common Stock."

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average price financial

"executed in multiple trades with a weighted average price of $43.3012."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Form 4 regulatory

"as reported in a Form 4 insider filing."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did California Water Service Group (CWT) disclose?

California Water Service Group director Thomas M. Krummel disclosed an open-market sale of 3,700 shares of Common Stock at a weighted average price of $43.3012 per share, as reported in a Form 4 insider filing.

At what price did the CWT director sell his California Water shares?

The director’s 3,700-share sale was executed in multiple trades with a weighted average price of $43.3012 per share, according to the Form 4, which also notes he can provide detailed trade breakdowns upon request.

How many California Water Service Group shares does the director still own?

Following the reported sale, director Thomas M. Krummel directly holds 23,805 shares of California Water Service Group Common Stock, as stated in the post-transaction ownership column of the Form 4 filing.

Was the California Water (CWT) insider trade an open-market sale?

Yes. The Form 4 classifies the transaction as an open-market sale of Common Stock, using transaction code “S,” which indicates a sale in the open market or private transaction under SEC reporting rules.

Does the Form 4 for CWT mention multiple trade executions for the sale?

The footnote explains the sale was executed in multiple trades, with a weighted average price of $43.3012. The reporting person undertakes to provide full details on the number of shares and prices upon request.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/21/2026 - 06:23 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Krummel Thomas M

(Last) (First) (Middle)

C/O CALIFORNIA WATER SERVICE GROUP

(Street)

SAN JOSE CALIFORNIA 95118

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CALIFORNIA WATER SERVICE GROUP [ CWT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/21/2026		S		3,700(1)	D	$43.3012	23,805	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This transaction was executed in multiple trades with a weighted average price of $43.3012. The reporting person hereby undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transaction was effected.

Remarks:

	/s/ Michelle R. Mortensen on behalf of Thomas M. Krummel	05/21/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)