California Water (CWT) VP logs 900-share grant and tax-withholding stock disposals

Rhea-AI Filing Summary

California Water Service Group reported insider equity transactions by Vice President of Facilities, Fleet & Procurement Elissa Y. Ouyang. On March 7, 2026, she acquired 900 shares of common stock as a grant or award, increasing her holdings before related tax transactions.

Also on March 7, dispositions of 488 shares and 57 shares of common stock at $45.59 per share, and on March 5, 2026 a disposition of 74 shares at $45.78 per share, were reported as tax-withholding dispositions, with shares withheld and surrendered to the issuer to cover tax obligations from vesting awards.

Footnotes state these taxes arose from the vesting of a Restricted Stock Award and a Performance Stock Unit award granted on March 7, 2023, which vested in full based on performance criteria, resulting in a 46% payout of the original goal.

Insider Trade Summary

4 transactions reported

Mixed 4 txns

Insider Ouyang Elissa Y

Role VP Facilities Fleet & Procure

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	900	$0.00	--
Tax Withholding	Common Stock	488	$45.59	$22K
Tax Withholding	Common Stock	57	$45.59	$3K
Tax Withholding	Common Stock	74	$45.78	$3K

Holdings After Transaction: Common Stock — 15,611 shares (Direct)

Footnotes (1)

1. Represents the number of shares withheld by and surrendered to the Issuer to satisfy the tax withholding obligations that arose in connection with the vesting of the Restricted Stock Award (RSA) The reporting person was granted a Performance Stock Unit (PSU) award on 3/7/2023. The PSU vested in full based on the satisfaction of certain performance criteria approved by the Board of Directors. The performance criteria was met resulting in 46% payout of the original goal Represents the number of shares withheld by and surrendered to the Issuer to satisfy the tax withholding obligations that arose in connection with the vesting of a Performance Stock Unit (PSU) Award.

Form 4 Insider Transactions: What Each Field Means →

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)
03/05/2026

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	03/05/2026		F		74(1)	D	$45.78	14,711	D
Common Stock	03/07/2026		A		900(2)	A	$0.0	15,611	D
Common Stock	03/07/2026		F		488(3)	D	$45.59	15,123	D
Common Stock	03/07/2026		F		57(1)	D	$45.59	15,066	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 by and surrendered to the Issuer to satisfy the tax withholding obligations that arose in connection with the vesting of the Restricted Stock Award (RSA)

2. The reporting person was granted a Performance Stock Unit (PSU) award on 3/7/2023. The PSU vested in full based on the satisfaction of certain performance criteria approved by the Board of Directors. The performance criteria was met resulting in 46% payout of the original goal

3. Represents the number of shares withheld by and surrendered to the Issuer to satisfy the tax withholding obligations that arose in connection with the vesting of a Performance Stock Unit (PSU) Award.

	By: /s/ Michelle R. Mortensen For: Elissa Y Ouyang	03/09/2026
	** 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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FAQ

What insider transactions did CWT executive Elissa Ouyang report on this Form 4?

Elissa Y. Ouyang reported receiving a grant of 900 shares of California Water Service Group common stock and three separate share dispositions used to satisfy tax-withholding obligations tied to vesting stock awards and performance stock units.

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

The filing shows a grant or award acquisition of 900 shares of California Water Service Group common stock on March 7, 2026, increasing Elissa Ouyang’s direct equity position before subsequent tax-related share withholdings.

Why were some of Elissa Ouyang’s CWT shares disposed of in this Form 4?

The dispositions reflect shares withheld and surrendered to California Water Service Group to cover tax-withholding obligations that arose when a Restricted Stock Award and a Performance Stock Unit award vested, rather than open-market sales by the executive.

What prices are associated with the CWT tax-withholding share dispositions?

The Form 4 reports tax-withholding dispositions of common stock at $45.59 per share on March 7, 2026, and at $45.78 per share on March 5, 2026, all in connection with vesting equity awards held by Elissa Ouyang.

What performance outcome is disclosed for Elissa Ouyang’s CWT Performance Stock Unit award?

The filing notes that a Performance Stock Unit award granted on March 7, 2023 vested in full based on performance criteria approved by the Board of Directors, with the performance criteria met at a 46% payout of the original goal.