Were Michelle Mortensen’s CWT share transactions open-market sales?

No, the transactions were not open-market sales. Both entries are coded as F, meaning shares were withheld and surrendered to the issuer solely to pay tax liabilities resulting from vesting Restricted Stock (RSA) Awards, rather than discretionary selling in the market.

What awards triggered the CWT share tax-withholding for Michelle Mortensen?

The tax-withholding dispositions arose from vesting Restricted Stock (RSA) Awards. One award was granted on June 5, 2024, and another on March 4, 2025. When these RSAs vested, shares were withheld and surrendered to cover related tax liabilities.

California Water (CWT) VP reports RSA tax-withholding share dispositions

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

California Water Service Group vice president Michelle R. Mortensen reported routine tax-related share dispositions tied to vesting restricted stock awards. On June 4 and June 5, 147 shares of common stock in total were withheld and surrendered to the company to cover tax withholding obligations from Restricted Stock (RSA) Awards granted in June 2024 and March 2025. These are not open-market sales but automatic tax-withholding transactions. Following the June 5 disposition, Mortensen holds 12,953.8 shares of common stock directly.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Mortensen Michelle R

Role VP Corp Sect, Gov & Assurance

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 — 12,953.8 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 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-withholding shares June 4: 74 shares at $45.24 Tax-withholding shares June 5: 73 shares at $45.82 Total tax-withholding shares: 147 shares +3 more

6 metrics

Tax-withholding shares June 4 74 shares at $45.24 F-coded tax-withholding disposition on June 4, 2026

Tax-withholding shares June 5 73 shares at $45.82 F-coded tax-withholding disposition on June 5, 2026

Total tax-withholding shares 147 shares Combined F-code dispositions covering RSA tax obligations

Post-transaction holdings 12,953.8 shares Direct common stock held after June 5, 2026 transaction

June 4 transaction value $3,349.76 74 shares at $45.24 per share, tax withholding

June 5 transaction value $3,344.86 73 shares at $45.82 per share, tax withholding

Key Terms

Restricted Stock (RSA) Award, tax withholding obligations, Form 4, non-derivative, +1 more

5 terms

Restricted Stock (RSA) Award financial

"in connection with the vesting of Restricted Stock (RSA) Award granted on March 4,2025"

tax withholding obligations financial

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

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

non-derivative financial

""transaction_type": "non-derivative""

transaction code F financial

""transaction_code": "F""

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Form 4 Insider Transactions: What Each Field Means →

06/08/2026 - 05:40 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^*

Mortensen Michelle R

(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 Corp Sect, Gov & Assurance

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	13,026.8	D
Common Stock	06/05/2026		F		73⁽²⁾	D	$45.82	12,953.8	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. 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.

	Michelle R. Mortensen	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 transaction did CWT executive Michelle Mortensen report on this Form 4?

Michelle Mortensen reported routine tax-related dispositions of California Water Service Group common stock. A total of 147 shares were withheld and surrendered to the company to satisfy tax withholding obligations arising from vesting Restricted Stock (RSA) Awards.

How many CWT shares were involved in Michelle Mortensen’s tax-withholding dispositions?

A total of 147 California Water Service Group common shares were used for tax withholding. This includes 74 shares at $45.24 per share on June 4 and 73 shares at $45.82 per share on June 5, according to the Form 4 data.

How many CWT shares does Michelle Mortensen hold after these transactions?

After the June 5 tax-withholding disposition, Michelle Mortensen directly holds 12,953.8 shares of California Water Service Group common stock. This post-transaction holding reflects the small number of shares surrendered to cover tax obligations on vesting RSAs.