What caused the tax-withholding share dispositions at California Water Service Group?

The dispositions were triggered by the vesting of Restricted Stock (RSA) awards granted to Dean Shannon. When these RSAs vested, shares were withheld and surrendered to the issuer to satisfy associated tax withholding obligations, rather than the executive selling shares on the market.

California Water Service (NYSE: CWT) EVP reports routine tax-withholding share transfers

Q: Were the CWT insider transactions open-market sales of stock?

No, the reported CWT transactions were tax-withholding dispositions , not open-market sales. Shares were withheld and surrendered to the issuer to satisfy tax liabilities from vesting Restricted Stock (RSA) awards, a common administrative process when equity compensation vests for executives.

Q: How many CWT shares were used for tax withholding for Dean Shannon?

A total of 147 common shares were used for tax withholding for Dean Shannon. This consisted of 74 shares at $45.24 per share and 73 shares at $45.82 per share, surrendered to cover tax obligations tied to vesting restricted stock awards.

Q: How are the CWT insider transactions coded in the Form 4 filing?

Both transactions are coded “F” in the Form 4, described as payment of tax liability by delivering securities. This code indicates shares were withheld for tax purposes on vesting equity awards, distinguishing them from open-market purchase or sale transactions by the insider.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

California Water Service Group senior vice president Dean Shannon C reported routine tax-related share dispositions tied to vesting restricted stock awards. On June 4 and 5, a total of 147 Common Stock shares were withheld and surrendered to the company at prices of $45.24 and $45.82 per share to satisfy tax withholding obligations from prior Restricted Stock (RSA) awards granted in June 2024 and March 2025. These transactions were coded as tax-withholding dispositions rather than open-market sales, and Shannon’s direct holdings after the transactions were 23,741.586 shares, including shares acquired through the Employee Stock Purchase Program.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Dean Shannon C

Role SR. VP, Cust Svc & Chief Sust

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	73	$45.82	$3K
Tax Withholding	Common Stock	74	$45.24	$3K

Holdings After Transaction: Common Stock — 23,741.586 shares (Direct, null)

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

Tax-withheld shares total: 147 shares Tax-withheld lot 1: 74 shares at $45.24/share Tax-withheld lot 2: 73 shares at $45.82/share +1 more

4 metrics

Tax-withheld shares total 147 shares Shares surrendered for tax withholding on RSAs

Tax-withheld lot 1 74 shares at $45.24/share Disposition on June 4, 2026

Tax-withheld lot 2 73 shares at $45.82/share Disposition on June 5, 2026

Holdings after June 5 transaction 23,741.586 shares Direct common stock held by Dean Shannon

Key Terms

Restricted Stock (RSA) Award, Employee Stock Purchase Program (ESPP), tax withholding obligations, tax-withholding disposition

4 terms

Restricted Stock (RSA) Award financial

"vesting of Restricted Stock (RSA) Award granted on March 4,2025"

Employee Stock Purchase Program (ESPP) financial

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

tax withholding obligations financial

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

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

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Form 4 Insider Transactions: What Each Field Means →

06/08/2026 - 05:19 PM

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^*

Dean Shannon C

(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)
	SR. VP, Cust Svc & Chief Sust

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/04/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/04/2026		F		74⁽¹⁾	D	$45.24	23,814.586⁽²⁾	D
Common Stock	06/05/2026		F		73⁽³⁾	D	$45.82	23,741.586	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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: Shannon C Dean	06/08/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did CWT executive Dean Shannon report?

Dean Shannon reported two tax-withholding dispositions totaling 147 shares of California Water Service Group common stock. The shares were withheld by the company to cover tax obligations arising from vesting restricted stock awards granted in June 2024 and March 2025, not sold on the open market.

Were the CWT insider transactions open-market sales of stock?

No, the reported CWT transactions were tax-withholding dispositions, not open-market sales. Shares were withheld and surrendered to the issuer to satisfy tax liabilities from vesting Restricted Stock (RSA) awards, a common administrative process when equity compensation vests for executives.

How many CWT shares were used for tax withholding for Dean Shannon?

A total of 147 common shares were used for tax withholding for Dean Shannon. This consisted of 74 shares at $45.24 per share and 73 shares at $45.82 per share, surrendered to cover tax obligations tied to vesting restricted stock awards.

What is Dean Shannon’s CWT shareholding after these transactions?

After these tax-withholding transactions, Dean Shannon directly holds 23,741.586 shares of California Water Service Group common stock. This total includes shares acquired through the company’s Employee Stock Purchase Program (ESPP), as noted in the filing’s footnotes.

How are the CWT insider transactions coded in the Form 4 filing?

Both transactions are coded “F” in the Form 4, described as payment of tax liability by delivering securities. This code indicates shares were withheld for tax purposes on vesting equity awards, distinguishing them from open-market purchase or sale transactions by the insider.