California Water Service Group (CWT) VP reports routine tax-related share withholding

Rhea-AI Filing Summary

California Water Service Group officer Sophie M. James reported routine share-withholding transactions related to vested restricted stock awards. On December 5, 2025, 50 shares of common stock were withheld and surrendered to the company at $44.88 per share to cover tax obligations from a restricted stock award granted on June 5, 2024. On December 7, 2025, a further 24 shares were withheld at $44.88 per share for taxes tied to an award granted on March 7, 2023.

After these transactions, James beneficially owned 6,604.014 shares of California Water Service Group common stock, held directly. This total includes shares acquired through the company’s Employee Stock Purchase Program.

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

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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^*

James Sophie Marwieh

(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)
	VP Water Qual & Envir Affairs

3. Date of Earliest Transaction (Month/Day/Year)
12/05/2025

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	12/05/2025		F		50(1)	D	$44.88	6,628.014	D
Common Stock	12/07/2025		F		24(2)	D	$44.88	6,604.014(3)	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. 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 March 7, 2023.

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

	By: /s/ Michelle R. Mortensen For: Sophie M. James	12/09/2025
	** 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 insider transaction did CWT officer Sophie M. James report?

Vice President of Water Quality & Environmental Affairs Sophie M. James reported share-withholding transactions where shares of California Water Service Group (CWT) common stock were surrendered to the company to satisfy tax withholding obligations on vested restricted stock awards.

How many CWT shares were withheld for taxes in this Form 4 filing?

The filing shows 50 shares of common stock withheld on December 5, 2025 and 24 shares withheld on December 7, 2025, all surrendered to cover tax obligations on vested restricted stock awards.

What price was used for the CWT shares withheld for tax purposes?

Both transactions reported in the filing used a price of $44.88 per share for the common stock withheld and surrendered to cover related tax withholding obligations.

How many California Water Service Group shares does Sophie M. James own after these transactions?

Following the reported transactions, Sophie M. James beneficially owned 6,604.014 shares of California Water Service Group common stock, held directly.

What is the reason given for the CWT share surrenders reported by Sophie M. James?

The filing states that the surrendered shares represent amounts withheld and delivered to the issuer to satisfy tax withholding obligations arising from the vesting of restricted stock (RSA) awards granted on June 5, 2024 and March 7, 2023.

Does the CWT Form 4 mention shares from an employee stock purchase program?

Yes. The explanation notes that the beneficially owned total of 6,604.014 shares includes shares acquired through the company’s Employee Stock Purchase Program.

What is Sophie M. James’s role at California Water Service Group?

The filing identifies Sophie M. James as an officer of California Water Service Group, serving as Vice President, Water Quality & Environmental Affairs.