[Form 4] California Water Service Insider Trading Activity

Rhea-AI Filing Summary

Thomas A. Scanlon, Corporate Controller & PAO and a reporting officer of California Water Service Group (CWT), reported two share dispositions in early September 2025. On 09/05/2025 he disposed of 29 shares at $47.09 to satisfy tax withholding from the vesting of a Restricted Stock Award granted on 06/05/2024. On 09/07/2025 he disposed of 23 shares at $47.09 to satisfy tax withholding from a Restricted Stock Award granted on 03/07/2023. Following these transactions his beneficial ownership is reported as 4,002.955 shares, which includes Employee Stock Purchase Program shares. The Form 4 was signed on behalf of Mr. Scanlon on 09/09/2025.

Positive

• Dispositions were minor in size (29 and 23 shares), suggesting no material reduction in insider ownership
• Transactions are clearly explained as tax-withholding for vested Restricted Stock Awards (grants dated 06/05/2024 and 03/07/2023)
• Post-transaction beneficial ownership is disclosed (4,002.955 shares including ESPP), providing transparency

Negative

• Shares were disposed of at $47.09, reducing direct holdings slightly
• Form was signed by a third party rather than the reporting person, which may prompt investors to verify signature authority

Insights

Financial Analyst

TL;DR: Officer sold small numbers of vested shares to cover taxes; remaining beneficial stake remains around 4,000 shares, implying no material change to ownership.

The reported transactions are routine tax-withholding dispositions tied to the vesting of restricted stock awards. Each sale was executed at the same price of $47.09 and involved modest share counts (29 and 23). These disposals do not indicate active trimming of a significant position and are consistent with standard post-vesting withholding practices. No derivative transactions or additional transfers are reported.

Corporate Governance Expert

TL;DR: This Form 4 documents customary withholding to satisfy tax liabilities on RSAs; disclosure appears complete and timely.

The filing identifies the reporting person, role (Corporate Controller & PAO), transaction codes, and explanatory footnotes linking each disposition to specific RSA vesting dates. The inclusion of Employee Stock Purchase Program shares in the post-transaction total is noted. The form shows a signature executed on behalf of the reporting person, which is a common administrative practice for Section 16 filings.

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^*

Scanlon Thomas 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)
	Corporate Controller & PAO

3. Date of Earliest Transaction (Month/Day/Year)
09/05/2025

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	09/05/2025		F		29(1)	D	$47.09	4,025.955	D
Common Stock	09/07/2025		F		23(2)	D	$47.09	4,002.955(3)	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 June 5, 2024.

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 March 7, 2023.

3. Includes shares acquired through the Employee Stock Purchase Program.

	By: /s/ Michelle R. Mortensen For: Thomas A. Scanlon	09/09/2025
	** 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.

FAQ

What shares did Thomas A. Scanlon report selling on Form 4 for CWT?

He reported dispositions of 29 shares on 09/05/2025 and 23 shares on 09/07/2025, each at $47.09.

Why were the CWT shares disposed of according to the Form 4?

The filings state the shares were withheld and surrendered to satisfy tax withholding arising from the vesting of Restricted Stock Awards.

How many CWT shares does Scanlon beneficially own after these transactions?

The Form 4 reports 4,002.955 shares beneficially owned after the reported transactions, which includes Employee Stock Purchase Program shares.

Which restricted stock grants triggered the tax-withholding transactions?

The dispositions correspond to RSAs granted on 06/05/2024 and 03/07/2023, per the form explanations.

When was the Form 4 signed and filed for these transactions?

The signature block shows the Form 4 was signed on behalf of Thomas A. Scanlon by Michelle R. Mortensen on 09/09/2025.