California Water officer has 134 shares withheld for tax

CWT’s VP of Facilities, Fleet, Procurement and IT had shares withheld to cover taxes on vesting restricted stock awards, not as open‑market sales.

Rhea-AI Filing Summary

CALIFORNIA WATER SERVICE GROUP (CWT) reports that officer Elissa Y. Ouyang disposed of a total of 134 shares of common stock on September 4–5, 2026, through shares withheld and surrendered to the issuer to pay tax liabilities arising from the vesting of prior Restricted Stock Awards. No Rule 10b5-1 trading plan is reported for these transactions.

Insider Trade Summary

Tax Withholding: 134 shares

Tax Withholding 2 txns

Insider Ouyang Elissa Y

Role VP Facilities Fleet Procure IT

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F2	66	$50.03	$3K
Tax Withholding	Common Stock F1	68	$50.03	$3K

Holdings After Transaction: Common Stock — 14,805.45 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 September 4, 2026: 68 shares Shares withheld September 5, 2026: 66 shares Total shares used for tax withholding: 134 shares +3 more

6 metrics

Shares withheld September 4, 2026 68 shares Common stock withheld and surrendered for tax withholding on RSA vesting

Shares withheld September 5, 2026 66 shares Common stock withheld and surrendered for tax withholding on RSA vesting

Total shares used for tax withholding 134 shares Sum of two code F transactions reported for tax withholding

Reference price per share $50.03 per share Price field reported for both tax-withholding transactions

RSA grant date 1 June 5, 2024 Restricted Stock (RSA) Award that generated tax withholding on September 4, 2026

RSA grant date 2 March 4, 2025 Restricted Stock (RSA) Award that generated tax withholding on September 5, 2026

Key Terms

Restricted Stock (RSA) Award, tax withholding obligations, withheld and surrendered, Rule 10b5-1

4 terms

Restricted Stock (RSA) Award financial

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

tax withholding obligations financial

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

withheld and surrendered financial

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

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported for these transactions"

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 report for Elissa Y. Ouyang?

CWT reported that Elissa Y. Ouyang had 134 shares of common stock withheld and surrendered to the issuer on September 4–5, 2026, to satisfy tax withholding obligations from vesting Restricted Stock Awards.

Were the recent CWT insider transactions open-market sales or tax withholdings?

They were tax-withholding dispositions. The Form 4 states the shares were withheld and surrendered to the issuer to satisfy tax withholding obligations from vesting Restricted Stock (RSA) Awards, not open-market purchases or sales.

How many CWT shares were involved in each Form 4 transaction?

On September 4, 2026, 68 shares of CWT common stock were withheld at a reference price of $50.03 per share. On September 5, 2026, 66 shares were withheld at $50.03 per share.

What caused the tax withholding share dispositions reported by CWT?

The tax withholding obligations arose from the vesting of Restricted Stock (RSA) Awards. One award was granted on June 5, 2024, and the other on March 4, 2025, according to the footnotes.

Was a Rule 10b5-1 trading plan used for these CWT insider transactions?

No. The filing’s Rule 10b5-1 checkbox is marked in a way that indicates no Rule 10b5-1 trading plan is reported in connection with these tax-withholding transactions.

Does the Form 4 show how many CWT shares Elissa Y. Ouyang holds after these transactions?

No. The non-derivative transaction rows list the share amounts disposed for taxes, but the total shares following transaction fields are blank, so post-transaction holdings are not stated in this Form 4.

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

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Available on EDGAR 09/08/2026 - 04:34 PM Accepted by SEC EDGAR 09/08/2026 - 04:34 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^*

Ouyang Elissa Y

(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 Facilities Fleet Procure IT

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		68(1)	D	$50.03	14,871.45	D
Common Stock	09/05/2026		F		66(2)	D	$50.03	14,805.45	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: Elissa Y Ouyang	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)