CWT CEO gets 10,295-share grant, withholds 2,017 for taxes

California Water Service Group Chairman, President & CEO Martin A. Kropelnicki reported routine equity compensation and tax withholding activity in company common stock.

Rhea-AI Filing Summary

California Water Service Group Chairman, President & CEO Martin A. Kropelnicki reported routine equity compensation and tax withholding activity in company common stock. On March 3, 2026, he acquired 10,295 shares at $0.00 per share as a restricted stock grant under the company’s equity incentive plan.

The filing notes this restricted stock vests with one-third on March 3, 2027 and the remaining two-thirds vesting quarterly over the next 24 months. On March 4, 2026, 2,017 shares were disposed of at $46.99 per share, representing shares withheld and surrendered to the issuer to satisfy tax withholding obligations from a prior restricted stock award vesting. After these transactions, he directly held 147,016.307 shares of common stock, including shares acquired through dividend reinvestment and the employee stock purchase plan.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider KROPELNICKI MARTIN A

Role Chairman President & CEO

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	2,017	$46.99	$95K
Grant/Award	Common Stock	10,295	$0.00	$0.00

Holdings After Transaction: Common Stock — 147,016.307 shares (Direct)

Footnotes (3)

1. F1. Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.
2. F2. Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan
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 March 4,2025

FAQ

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

What insider transactions did CWT CEO Martin Kropelnicki report on this Form 4?

Martin Kropelnicki reported a grant of 10,295 shares of California Water Service Group common stock and a tax-withholding disposition of 2,017 shares. Both transactions involved restricted stock awards under the company’s equity compensation arrangements, not open-market buying or selling.

Was the CWT CEO’s Form 4 transaction an open-market stock sale?

No, the Form 4 shows a tax-withholding disposition of 2,017 shares, surrendered to the issuer to cover tax obligations from restricted stock vesting. This differs from an open-market sale because the shares were not sold to public investors.

What equity award did the CWT CEO receive according to this filing?

The CEO received a restricted stock grant of 10,295 shares on March 3, 2026 under California Water Service Group’s equity incentive plan. One-third vests on March 3, 2027, with the remaining two-thirds vesting quarterly over the following 24 months.

How many CWT shares did the CEO hold after the reported Form 4 transactions?

After the reported transactions, the CEO directly held 147,016.307 shares of California Water Service Group common stock. This figure includes shares acquired through the company’s dividend reinvestment program and the employee stock purchase plan, as noted in the filing’s footnotes.

Why were 2,017 CWT shares disposed of in the CEO’s Form 4?

The 2,017 shares were withheld and surrendered to California Water Service Group to satisfy tax withholding obligations from the vesting of a restricted stock award granted on March 4, 2025. This is a common method for covering taxes on equity compensation.

How does the restricted stock granted to the CWT CEO vest over time?

The 10,295 restricted shares granted on March 3, 2026 vest with one-third on March 3, 2027. The remaining two-thirds vest in quarterly installments over the succeeding 24 months, creating a multi-year vesting schedule tied to continued service.

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

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Accepted by SEC EDGAR 03/05/2026 - 08:09 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 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)
03/03/2026

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	03/03/2026		A		10,295(1)	A	$0.0	149,033.307(2)	D
Common Stock	03/04/2026		F		2,017(3)	D	$46.99	147,016.307	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. Restricted stock granted on 3/3/2026 pursuant to the California Water Service Group equity incentive plan in a transaction exempt under Rule 16-b-3 vests with one-third on March 3, 2027, and with the remaining 2/3 vesting quarterly over the succeeding 24 months.

2. Includes shares acquired through Dividend Reinvestment and Employee Stock Purchase Plan

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 4,2025

	By: /s/ Michelle R. Mortensen For: Martin A Kropelnicki	03/05/2026
	** 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.
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