Cal Water VP shares withheld for tax obligations

California Water Service Group vice president Greg A. Milleman reported routine tax-related share dispositions tied to restricted stock vesting.

Rhea-AI Filing Summary

California Water Service Group vice president Greg A. Milleman reported routine tax-related share dispositions tied to restricted stock vesting. On June 4 and June 5, 2026, a total of 133 shares of common stock were withheld and surrendered to the company to satisfy tax withholding obligations from Restricted Stock (RSA) Awards granted in 2024 and 2025.

These F-code transactions are not open-market sales but mechanical tax-withholding dispositions. After these withholdings, Milleman directly holds 13,708.22 shares of common stock, including shares acquired through the Employee Stock Purchase Program.

Insider Trade Summary

Exercise Price or Tax Liability: 133 shares

Exercise Price or Tax Liability 2 txns

Insider Milleman Greg A

Role VP Rates & Regulatory Affairs

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	66	$45.82	$3K
Exercise Price or Tax Liability	Common Stock	67	$45.24	$3K

Holdings After Transaction: Common Stock — 13,708.22 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 March 4,2025
2. F2. Includes shares acquired through the Employee Stock Purchase Program (ESPP).
3. F3. 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.

Key Figures

Tax-withheld shares June 5, 2026: 66 shares at $45.82 Tax-withheld shares June 4, 2026: 67 shares at $45.24 Total tax-withheld shares: 133 shares +2 more

5 metrics

Tax-withheld shares June 5, 2026 66 shares at $45.82 Code F disposition of common stock to satisfy tax obligations

Tax-withheld shares June 4, 2026 67 shares at $45.24 Code F disposition of common stock to satisfy tax obligations

Total tax-withheld shares 133 shares Aggregate of June 4 and June 5, 2026 F-code transactions

Post-transaction holdings 13,708.22 shares Direct ownership after June 5, 2026 tax-withholding disposition

Role of reporting person VP Rates & Regulatory Affairs Officer position at California Water Service Group

Key Terms

Restricted Stock (RSA) Award, Employee Stock Purchase Program (ESPP), tax withholding obligations

3 terms

Restricted Stock (RSA) Award financial

"in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025"

Employee Stock Purchase Program (ESPP) financial

"Includes shares acquired through the Employee Stock Purchase Program (ESPP)."

tax withholding obligations financial

"to satisfy the tax withholding obligations that arose in connection with the vesting of Restricted Stock (RSA) Award"

FAQ

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

What did CWT executive Greg A. Milleman report in this Form 4?

Greg A. Milleman reported share dispositions related to tax withholding, not market sales. A total of 133 California Water Service Group common shares were withheld and surrendered to the company to cover taxes triggered by the vesting of prior Restricted Stock (RSA) Awards.

Were any open-market buys or sells of CWT stock reported by Milleman?

No open-market purchases or sales were reported. Both transactions used code F, indicating shares were withheld by the issuer solely to satisfy tax withholding obligations arising from the vesting of Restricted Stock (RSA) Awards previously granted to Greg A. Milleman.

How many CWT shares were withheld for Greg Milleman’s tax obligations?

A total of 133 California Water Service Group common shares were withheld. The Form 4 shows 67 shares withheld on June 4, 2026 at $45.24 per share and 66 shares withheld on June 5, 2026 at $45.82 per share to cover tax liabilities.

What is Greg Milleman’s CWT share ownership after these transactions?

Following the tax-withholding dispositions, Greg A. Milleman directly holds 13,708.22 California Water Service Group common shares. The filing notes that this figure includes shares acquired through the company’s Employee Stock Purchase Program, reflecting his ongoing equity stake after the restricted stock vesting events.

What triggered the tax-withholding share dispositions in CWT’s Form 4?

The dispositions were triggered by vesting of Restricted Stock (RSA) Awards granted to Greg A. Milleman. Footnotes state shares were withheld to satisfy tax obligations arising from RSAs granted on March 4, 2025 and June 5, 2024 when those awards vested.

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

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Accepted by SEC EDGAR 06/08/2026 - 05:38 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^*

Milleman Greg A

(Last) (First) (Middle)

1720 NORTH FIRST STREET

(Street)

SAN JOSE CALIFORNIA 95112

(City) (State) (Zip)

UNITED STATES

(Country)

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 Rates & Regulatory Affairs

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	06/04/2026		F		67(1)	D	$45.24	13,774.22(2)	D
Common Stock	06/05/2026		F		66(3)	D	$45.82	13,708.22	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 March 4,2025

2. Includes shares acquired through the Employee Stock Purchase Program (ESPP).

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 June 5, 2024.

	By: /s/ Michelle R. Mortensen For: Greg A Milleman	06/08/2026
	** 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.
* Form 4: SEC 1474 (03-26)