California Water Service Group (CWT) officer details RSA tax share withholding

Rhea-AI Filing Summary

California Water Service Group officer Thomas A. Scanlon, Corporate Controller & PAO, reported two transactions in company common stock. On December 5, 2025, 29 shares were withheld at $44.88 per share to cover taxes on the vesting of a restricted stock award granted June 5, 2024. On December 7, 2025, an additional 23 shares were withheld at $44.88 per share for taxes related to a restricted stock award granted March 7, 2023. After these withholding transactions, Scanlon beneficially owns 3,975.101 shares of California Water Service Group common stock, including shares acquired through the Employee Stock Purchase Program. Both transactions are coded as tax-withholding events rather than open-market buys or sells.

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

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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^*

Scanlon Thomas A

(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)
	Corporate Controller & PAO

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		29(1)	D	$44.88	3,998.101	D
Common Stock	12/07/2025		F		23(2)	D	$44.88	3,975.101(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: Thomas A. Scanlon	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.
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FAQ

What insider transaction did CWT report for Thomas A. Scanlon?

The filing shows that Thomas A. Scanlon, Corporate Controller & PAO of California Water Service Group (CWT), had company shares withheld on two dates in December 2025 to cover tax obligations arising from vesting restricted stock awards.

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

The report discloses that 29 shares of California Water Service Group common stock were withheld on December 5, 2025, and 23 shares were withheld on December 7, 2025, both at a price of $44.88 per share.

What is Thomas A. Scanlon’s CWT share ownership after these transactions?

Following the reported tax-withholding transactions, Thomas A. Scanlon beneficially owns 3,975.101 shares of California Water Service Group common stock, which includes shares acquired through the Employee Stock Purchase Program.

Were these CWT transactions open-market trades or tax withholding events?

The transactions are coded "F", which indicates that the shares were withheld and surrendered to the issuer to satisfy tax withholding obligations triggered by the vesting of restricted stock awards, rather than open-market purchases or sales.

Which equity awards are referenced in this CWT Form 4 filing?

The filing explains that one transaction relates to the vesting of a Restricted Stock (RSA) Award granted on June 5, 2024, and the other relates to the vesting of a Restricted Stock (RSA) Award granted on March 7, 2023.

What is Thomas A. Scanlon’s role at California Water Service Group (CWT)?

In this report, Thomas A. Scanlon is identified as an officer of California Water Service Group, serving as Corporate Controller & PAO.