Shawn C. Bunting - 03 Mar 2026 Form 4 Insider Report for CALIFORNIA WATER SERVICE GROUP (CWT)

Role: Sr. VP, GC and Business Dev
Signature: By: /s/ Michelle R. Mortensen For: Shawn C Bunting
Issuer symbol: CWT
Transactions as of: 03 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Mar 2026, 19:58:33 UTC
Previous filing: 09 Dec 2025
Next filing: 09 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Bunting Shawn C	Sr. VP, GC and Business Dev	1720 NORTH FIRST STREET, SAN JOSE	By: /s/ Michelle R. Mortensen For: Shawn C Bunting	05 Mar 2026	0001965747

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CWT	Common Stock	Award		+1,650	+50%	$0.000000^*	4,960	03 Mar 2026	Direct	F1, F2
transaction	CWT	Common Stock	Tax liability		-310	-6.2%	$46.99^*	4,650	04 Mar 2026	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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 a one-year cliff vesting term, vesting 100% on the first anniversary of the grant date.
F2	Includes shares acquired through Dividend Reinvestment.
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