[Form 4] California Water Service Insider Trading Activity

Rhea-AI Filing Summary

James P. Lynch, SVP, CFO and Treasurer of California Water Service Group (CWT), reported a Form 4 disclosing a transaction on 09/05/2025. The filing shows a disposition coded F of 48 shares of common stock at an average price of $47.09, described as shares withheld and surrendered to satisfy tax withholding on vested restricted stock awards granted on June 5, 2024. After the transaction, the filing reports beneficial ownership of 4,116.9 shares, which includes shares acquired through the company’s Employee Stock Purchase Program. The Form 4 was signed on behalf of Lynch on 09/09/2025.

Insights

Corporate Governance Expert

TL;DR: Routine insider tax-withholding disposition; non-material to ownership stake.

This Form 4 documents a tax-related disposition of 48 shares by an executive officer following vesting of restricted stock. The filing states the shares were surrendered to satisfy tax obligations rather than sold on the open market, and the reporting person retains approximately 4,116.9 shares beneficially. From a governance perspective, this is a customary administrative transaction and does not indicate a shift in executive ownership policy or control.

Securities Analyst

TL;DR: Transaction appears routine and immaterial versus total outstanding shares.

The disposition is coded as a withholding to meet tax liabilities related to vested RSAs and is recorded at $47.09 per share for 48 shares. The remaining beneficial ownership is reported precisely, and the filer indicates participation in the Employee Stock Purchase Program. There is no indication of an open-market sale or change in compensation structure in this filing.

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)
09/05/2025

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	09/05/2025		F		48(1)	D	$47.09	4,116.9(2)	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. Represents the number of shares withheld and surrendered to the issuer to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award granted on June 5, 2024.

2. Includes shares acquired through the Employee Stock Purchase Program.

	By: /s/ Michelle R. Mortensen For: James P. Lynch	09/09/2025
	** 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.

FAQ

What did James P. Lynch disclose on the Form 4 for CWT?

The Form 4 discloses a disposition of 48 shares on 09/05/2025 at an average price of $47.09, withheld to satisfy tax obligations from vested restricted stock.

How many CWT shares does James P. Lynch beneficially own after the reported transaction?

The filing reports beneficial ownership of 4,116.9 shares following the reported transaction.

Was the disposition an open-market sale or a tax withholding?

The filing explicitly states the shares were withheld and surrendered to satisfy tax withholding obligations related to a Restricted Stock Award.

When was the Restricted Stock Award that triggered withholding granted?

The Restricted Stock Award that triggered the withholding was granted on June 5, 2024, per the filing's explanation.

Who signed the Form 4 on behalf of the reporting person and when?

The Form 4 was signed by Michelle R. Mortensen for James P. Lynch on 09/09/2025.