California Water Service Group (CWT) CEO logs tax-share surrenders and 3,000-share charitable gift

Rhea-AI Filing Summary

California Water Service Group’s Chairman, President & CEO adjusted his equity holdings through routine share movements. On December 5, 2025, shares of common stock were withheld and surrendered to the company to cover tax obligations from a restricted stock award granted on June 5, 2024, totaling 492 shares at $44.88 per share. That same day, he made a 3,000-share gift of common stock to a donor-advised fund, which was not a market transaction and therefore shows no price.

On December 7, 2025, additional tax withholding related to a restricted stock award granted on March 7, 2023 led to the surrender of 385 shares at $44.88 per share. After these transactions, the reporting person beneficially owned 136,253.75 shares of California Water Service Group common stock in direct form.

Insider Trade Summary

3,000 shares gifted

Mixed 3 txns

Insider KROPELNICKI MARTIN A

Role Chairman President & CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	385	$44.88	$17K
Tax Withholding	Common Stock	492	$44.88	$22K
Gift	Common Stock	3,000	$0.00	--

Holdings After Transaction: Common Stock — 136,253.75 shares (Direct)

Footnotes (1)

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. The transaction represents gift to donor-advised fund. This is not a market transaction, thus no price has been reported. 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.

Form 4 Insider Transactions: What Each Field Means →

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
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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^*

KROPELNICKI MARTIN 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)
	Chairman President & CEO

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		492(1)	D	$44.88	139,638.75	D
Common Stock	12/05/2025		G		3,000(2)	D	$0.0	136,638.75	D
Common Stock	12/07/2025		F		385(3)	D	$44.88	136,253.75	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. The transaction represents gift to donor-advised fund. This is not a market transaction, thus no price has been reported.

3. 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.

	By: /s/ Michelle R. Mortensen For: Martin A. Kropelnicki	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 activity did CWT report for its CEO on this Form 4?

The Chairman, President & CEO of California Water Service Group (CWT) reported routine share movements, including stock withheld for taxes on restricted stock vesting and a 3,000-share gift to a donor-advised fund.

How many California Water Service Group shares were used for tax withholding?

The CEO surrendered 492 shares at $44.88 per share on December 5, 2025 and 385 shares at $44.88 per share on December 7, 2025 to satisfy tax withholding obligations on restricted stock awards.

What was the nature of the 3,000-share transaction reported by CWT’s CEO?

The 3,000 shares of CWT common stock were reported as a gift to a donor-advised fund. It was not a market transaction, so no transaction price was reported.

What type of equity awards were involved in the tax withholding for CWT’s CEO?

The tax withholding transactions were tied to the vesting of Restricted Stock (RSA) Awards granted on June 5, 2024 and March 7, 2023.

How many CWT shares does the CEO beneficially own after these transactions?

Following the reported tax-withholding and gift transactions, the CEO beneficially owned 136,253.75 shares of California Water Service Group common stock directly.

Is this CWT insider filing for one person or multiple reporting persons?

The filing is indicated as a Form filed by one reporting person, covering the Chairman, President & CEO of California Water Service Group.