California Water CEO has 998 shares withheld for tax

CWT’s CEO had 998 shares withheld in early September 2026 to satisfy taxes on vesting restricted stock awards, not as open-market sales.

Rhea-AI Filing Summary

CALIFORNIA WATER SERVICE GROUP (CWT) reported that Chairman, President & CEO Martin A. Kropelnicki had company shares withheld to cover tax obligations from restricted stock vesting. On September 4 and 5, 2026, a total of 998 shares of common stock were withheld and surrendered to the issuer for this purpose at a reference value of $50.03 per share, rather than sold in open-market transactions.

Insider Trade Summary

Tax Withholding: 998 shares

Tax Withholding 2 txns

Insider KROPELNICKI MARTIN A

Role Chairman President & CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F2	493	$50.03	$25K
Tax Withholding	Common Stock F1	505	$50.03	$25K

Holdings After Transaction: Common Stock — 147,286.546 shares (Direct)

Footnotes (2)

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. 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

Shares withheld on September 4, 2026: 505 shares Shares withheld on September 5, 2026: 493 shares Total shares withheld for tax obligations: 998 shares +3 more

6 metrics

Shares withheld on September 4, 2026 505 shares Common stock surrendered to issuer for tax withholding on RSA vesting

Shares withheld on September 5, 2026 493 shares Common stock surrendered to issuer for tax withholding on RSA vesting

Total shares withheld for tax obligations 998 shares Combined September 4–5, 2026 transactions by CEO

Reference price per share $50.03 per share Used in both tax-withholding transactions for CWT common stock

RSA grant date 1 March 4, 2025 Restricted Stock (RSA) Award whose vesting created a tax obligation

RSA grant date 2 June 5, 2024 Restricted Stock (RSA) Award whose vesting created a tax obligation

Key Terms

Restricted Stock (RSA) Award, tax withholding obligations, withheld and surrendered to the issuer

3 terms

Restricted Stock (RSA) Award financial

"in connection with the vesting of Restricted Stock (RSA) Award granted"

tax withholding obligations financial

"to satisfy the tax withholding obligations that arose in connection"

withheld and surrendered to the issuer financial

"Represents the number of shares withheld and surrendered to the issuer"

FAQ

What insider transaction did CWT report for CEO Martin A. Kropelnicki?

CWT reported that CEO Martin A. Kropelnicki had 998 shares of common stock withheld and surrendered to the issuer on September 4 and 5, 2026 to satisfy tax withholding obligations from restricted stock vesting.

Were the CWT CEO’s Form 4 transactions open-market sales?

No. The Form 4 states the transactions represent shares withheld and surrendered to the issuer to satisfy tax withholding obligations arising from the vesting of Restricted Stock (RSA) Awards, not open-market sales.

How many CWT shares were involved in each tax-withholding transaction?

On September 4, 2026, 505 shares of CWT common stock were withheld. On September 5, 2026, an additional 493 shares were withheld. In total, 998 shares were surrendered to the issuer for tax withholding.

What price per share is referenced for the CWT CEO’s withheld shares?

Each transaction references a price of $50.03 per share for CWT common stock, which is used in connection with calculating the value of the shares withheld to satisfy the tax withholding obligations.

Which equity awards triggered the CWT CEO’s tax withholding transactions?

The footnotes state the withheld shares relate to vesting of Restricted Stock (RSA) Awards granted on March 4, 2025 and June 5, 2024, which created the tax withholding obligations satisfied by surrendering the shares.

Were the CWT CEO’s transactions made under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not checked, and the footnotes describe the transactions as tax withholding related to restricted stock vesting, with no indication they were executed under a Rule 10b5-1 trading plan.

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

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Available on EDGAR 09/08/2026 - 04:24 PM Accepted by SEC EDGAR 09/08/2026 - 04:24 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^*

KROPELNICKI MARTIN 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)
	Chairman President & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/04/2026

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	09/04/2026		F		505(1)	D	$50.03	147,779.546	D
Common Stock	09/05/2026		F		493(2)	D	$50.03	147,286.546	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. 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: Martin A Kropelnicki	09/08/2026
	** 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)