California Water VP has 101 shares withheld for tax

CWT’s VP of Water Quality reported 101 shares withheld to cover taxes on vesting restricted stock awards, not open-market sales.

Rhea-AI Filing Summary

CALIFORNIA WATER SERVICE GROUP (CWT) officer Sophie Marwieh, VP Water Qual, reported two dispositions of common stock on September 4 and 5, 2026 totaling 101 shares. These code F transactions reflect shares withheld and surrendered to the issuer to satisfy tax withholding obligations from vesting Restricted Stock Awards granted in March 2025 and June 2024, rather than open-market sales. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Tax Withholding: 101 shares

Tax Withholding 2 txns

Insider James Sophie Marwieh

Role VP Water Qual

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F3	50	$50.03	$3K
Tax Withholding	Common Stock F1, F2	51	$50.03	$3K

Holdings After Transaction: Common Stock — 8,287.401 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

Shares withheld for taxes (September 4, 2026): 51 shares Shares withheld for taxes (September 5, 2026): 50 shares Total shares used for tax withholding: 101 shares +2 more

5 metrics

Shares withheld for taxes (September 4, 2026) 51 shares Common stock surrendered to issuer to satisfy tax withholding on RSA vesting granted March 4, 2025

Shares withheld for taxes (September 5, 2026) 50 shares Common stock surrendered to issuer to satisfy tax withholding on RSA vesting granted June 5, 2024

Total shares used for tax withholding 101 shares Aggregate shares delivered or withheld across both code F transactions

Reference price per share $50.03 per share Price used in both September 2026 tax-withholding dispositions

Exercise price or tax-liability transactions count 2 transactions Number of code F entries reported for payment of tax liability by delivering or withholding securities

Key Terms

Restricted Stock (RSA) Award, Employee Stock Purchase Program (ESPP), tax withholding obligations, Rule 10b5-1

4 terms

Restricted Stock (RSA) Award financial

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

Employee Stock Purchase Program (ESPP) financial

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

tax withholding obligations financial

"shares withheld and surrendered to the issuer to satisfy the tax withholding obligations"

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported."

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

What insider transactions did CWT’s VP of Water Quality report in this Form 4?

The filing reports two code F transactions on September 4 and 5, 2026, where a total of 101 common shares were withheld and surrendered to California Water Service Group to satisfy tax withholding obligations arising from vesting Restricted Stock Awards.

Were the CWT Form 4 transactions open-market sales of stock?

No. Both transactions are reported under code F as payment of tax liability by delivering or withholding securities, meaning the 101 shares were withheld and surrendered to the issuer for taxes related to vesting Restricted Stock Awards, not sold in the open market.

What were the dates and sizes of the CWT insider tax-withholding transactions?

On September 4, 2026, 51 common shares were withheld. On September 5, 2026, 50 common shares were withheld. Each transaction used a reference price of $50.03 per share to determine the value of shares applied to the tax obligations.

Which equity awards triggered the tax-withholding share dispositions at CWT?

The September 4, 2026 transaction relates to a Restricted Stock (RSA) Award granted on March 4, 2025. The September 5, 2026 transaction relates to a Restricted Stock (RSA) Award granted on June 5, 2024, both vestings creating tax withholding obligations.

Does the CWT Form 4 mention shares from an Employee Stock Purchase Program (ESPP)?

Yes. A footnote states the reporting person’s holdings include shares acquired through the Employee Stock Purchase Program (ESPP). The Form 4 does not state the exact number of ESPP shares but clarifies they form part of the overall share position.

Was a Rule 10b5-1 trading plan involved in the CWT Form 4 transactions?

No. The Form 4 indicates no Rule 10b5-1 trading plan for these transactions. The dispositions are described as tax-withholding events tied to Restricted Stock Award vesting, not pre-arranged trading plan executions.

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Available on EDGAR 09/08/2026 - 04:17 PM Accepted by SEC EDGAR 09/08/2026 - 04:16 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^*

James Sophie Marwieh

(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 Water Qual

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		51(1)	D	$50.03	8,337.401(2)	D
Common Stock	09/05/2026		F		50(3)	D	$50.03	8,287.401	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: Sophie M James	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)