Cal Water VP gets stock award, withholds shares for tax

California Water Service Group vice president Elissa Y. Ouyang reported routine equity compensation and related tax withholding transactions.

Rhea-AI Filing Summary

California Water Service Group vice president Elissa Y. Ouyang reported routine equity compensation and related tax withholding transactions. On March 3, 2026, she acquired 1,650 shares of common stock as a restricted stock grant under the company’s equity incentive plan at a stated price of $0.

The grant vests with one-third on March 3, 2027, and the remaining two-thirds vesting quarterly over the following 24 months. On March 4, 2026, 299 shares were withheld and surrendered to the issuer at $46.99 per share to satisfy tax obligations from a restricted stock award that vested from a March 4, 2025 grant. After these transactions, she directly holds 14,785 common shares, including shares acquired through dividend reinvestment and the employee stock purchase plan.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Ouyang Elissa Y

Role VP Facilities Fleet & Procure

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	299	$46.99	$14K
Grant/Award	Common Stock	1,650	$0.00	$0.00

Holdings After Transaction: Common Stock — 14,785 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 did the California Water Service Group (CWT) Form 4 report for Elissa Ouyang?

The Form 4 reports that VP Elissa Y. Ouyang received a restricted stock grant and had shares withheld for taxes. She acquired 1,650 restricted shares on March 3, 2026, and 299 shares were surrendered on March 4, 2026 to cover tax withholding obligations.

How many California Water Service Group (CWT) shares were granted to Elissa Ouyang?

Elissa Y. Ouyang received a grant of 1,650 shares of California Water Service Group common stock. The award was issued under the company’s equity incentive plan as restricted stock, with no cash price per share shown, and is subject to a multi-year vesting schedule.

What is the vesting schedule for Elissa Ouyang’s 1,650-share restricted stock grant at CWT?

The 1,650 restricted shares granted on March 3, 2026 vest over three years. One-third vests on March 3, 2027, and the remaining two-thirds vest in equal quarterly installments during the following 24 months, reflecting a gradual, time-based vesting structure for this equity award.

Why were 299 California Water Service Group shares surrendered by Elissa Ouyang?

The 299 shares represent stock withheld and surrendered to California Water Service Group to satisfy tax withholding obligations. These obligations arose from the vesting of a restricted stock award originally granted on March 4, 2025, making this a tax-withholding disposition rather than an open-market sale.

How many California Water Service Group (CWT) shares does Elissa Ouyang now own?

After the reported transactions, Elissa Y. Ouyang directly owns 14,785 shares of California Water Service Group common stock. This figure includes shares accumulated through the company’s Dividend Reinvestment Plan and the Employee Stock Purchase Plan, as noted in the filing footnotes.

Were Elissa Ouyang’s California Water Service Group transactions open-market buys or sells?

The transactions were not open-market trades. One was a grant of 1,650 restricted shares under the equity incentive plan, and the other was a 299-share tax-withholding disposition, where shares were surrendered to the issuer to cover tax liabilities from a prior restricted stock award vesting.

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

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Accepted by SEC EDGAR 03/05/2026 - 08:21 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 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)
	VP Facilities Fleet & Procure

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		1,650(1)	A	$0.0	15,084(2)	D
Common Stock	03/04/2026		F		299(3)	D	$46.99	14,785	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: Elissa Y Ouyang	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.
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.