California Water Service SVP reports Form 4 equity tax withholding

California Water Service Group officer reports small equity transactions.

Rhea-AI Filing Summary

California Water Service Group officer reports small equity transactions. The company’s SVP Corp Services & Chief Risk Officer filed a Form 4 disclosing two dispositions of common stock of CALIFORNIA WATER SERVICE GROUP (CWT). On December 5, 2025, 69 shares were withheld and surrendered to the issuer at $44.88 per share to cover tax obligations from the vesting of a restricted stock award granted on June 5, 2024, leaving 22,664.665 shares beneficially owned directly. On December 7, 2025, 54 shares were similarly withheld and surrendered at $44.88 per share related to a restricted stock award granted on March 7, 2023, resulting in 22,610.665 shares beneficially owned directly, which includes shares acquired through the Employee Stock Purchase Program.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Luu Michael B

Role SVP Corp Svce & Chief Risk Of

Type	Security	Shares	Price	Value
Disposition	Common Stock	54	$44.88	$2K
Exercise Price or Tax Liability	Common Stock	69	$44.88	$3K

Holdings After Transaction: Common Stock — 22,610.665 shares (Direct)

Footnotes (3)

1. F1. 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. F2. 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. F3. Includes shares acquired through the Employee Stock Purchase Program.

FAQ

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

What insider transaction did CALIFORNIA WATER SERVICE GROUP (CWT) report?

The SVP Corp Services & Chief Risk Officer reported two small dispositions of CALIFORNIA WATER SERVICE GROUP common stock, both tied to tax withholding on vested restricted stock awards.

How many CWT shares were involved in the December 5, 2025 transaction?

On December 5, 2025, the officer had 69 shares of CALIFORNIA WATER SERVICE GROUP common stock withheld and surrendered to the issuer at $44.88 per share to satisfy tax obligations from a June 5, 2024 restricted stock award.

What happened in the December 7, 2025 transaction for CWT stock?

On December 7, 2025, 54 shares of CALIFORNIA WATER SERVICE GROUP common stock were withheld and surrendered to the issuer at $44.88 per share for tax withholding related to a March 7, 2023 restricted stock award.

How many CWT shares does the reporting officer own after these transactions?

After the December 7, 2025 transaction, the officer beneficially owns 22,610.665 CALIFORNIA WATER SERVICE GROUP common shares directly, including shares acquired through the Employee Stock Purchase Program.

Were these CWT insider transactions open-market sales?

No. The filing states the shares were withheld and surrendered to the issuer to satisfy tax withholding obligations arising from the vesting of restricted stock awards.

What is the role of the reporting person at CALIFORNIA WATER SERVICE GROUP (CWT)?

The reporting person is an officer of CALIFORNIA WATER SERVICE GROUP, serving as SVP Corp Services & Chief Risk Officer.

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

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Accepted by SEC EDGAR 12/09/2025 - 04:49 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^*

Luu Michael B

(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 Corp Svce & Chief Risk Of

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		69(1)	D	$44.88	22,664.665	D
Common Stock	12/07/2025		D		54(2)	D	$44.88	22,610.665(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: Michael B. Luu	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.