California Water Service insider buys 550 shares at about $42.8

California Water Service Group senior executive James P. Lynch, who serves as SVP, CFO and Treasurer, reported buying company stock.

Rhea-AI Filing Summary

California Water Service Group senior executive James P. Lynch, who serves as SVP, CFO and Treasurer, reported buying company stock. On 12/10/2025, he purchased 550 shares of California Water Service Group common stock in an open-market transaction coded "P" for a purchase. The filing shows a per-share price of about $42.80.

After this transaction, Lynch directly beneficially owns 4,618.9 shares of California Water Service Group common stock. The report is a standard Form 4 insider transaction filed for a single reporting person.

Insider Trade Summary

Net Buyer: 550 shares

Net Buy 1 txn

Insider Lynch James Patrick

Role SVP CFO and Treasurer

Bought 550 shs ($24K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	550	$42.80	$24K

Holdings After Transaction: Common Stock — 4,618.9 shares (Direct)

Footnotes (1)

1. F1. These shares were purchased in multiple transactions at the price of $42.795. The reporting person undertakes to provide full information regarding the number of shares purchased

FAQ

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

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

The report shows SVP, CFO and Treasurer James P. Lynch bought 550 shares of California Water Service Group common stock in an open-market purchase.

When did the CWT insider stock purchase take place?

The insider purchase occurred on 12/10/2025, as reported in the Form 4.

What price did the California Water Service Group insider pay per share?

The filing lists a purchase price of approximately $42.80 per share of California Water Service Group common stock.

How many CWT shares does the insider own after this transaction?

Following the reported purchase, James P. Lynch beneficially owns 4,618.9 shares of California Water Service Group common stock directly.

What is the role of the reporting person at California Water Service Group (CWT)?

The reporting person, James P. Lynch, is an officer of California Water Service Group, serving as SVP, CFO and Treasurer.

Is this California Water Service Group (CWT) Form 4 filed by more than one reporting person?

No. The Form 4 indicates it is filed by one reporting person rather than a group.

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

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Accepted by SEC EDGAR 12/11/2025 - 06:43 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^*

Lynch James Patrick

(Last) (First) (Middle)

1720 NORTH FIRST STREET

(Street)

SAN JOSE CA 95112

(City) (State) (Zip)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP CFO and Treasurer

3. Date of Earliest Transaction (Month/Day/Year)
12/10/2025

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

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

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

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	12/10/2025		P		550(1)	A	$42.8	4,618.9	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. These shares were purchased in multiple transactions at the price of $42.795. The reporting person undertakes to provide full information regarding the number of shares purchased

	By: /s/ Michelle R. Mortensen For: James P. Lynch	12/11/2025
	** 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.