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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

Current Report Pursuant to Section 13\nor 15(d) of
\n The Securities Exchange Act of 1934

Date of Report (date of earliest event\nreported): October 28, 2026

CALIFORNIA WATER SERVICE GROUP

(Exact name of Registrant as Specified in its\nCharter)

\n\n \n \n \n

Delaware
\n(State or other jurisdiction
of incorporation)

1-13883
\n(Commission file number)

77-0448994
\n(I.R.S. Employer
Identification Number)

\n\n \n \n

1720 North First Street
San Jose, California
\n(Address of principal executive offices)

95112
\n(Zip Code)

(408) 367-8200

(Registrant’s telephone number, including\narea code)

N/A

(Former name or former address, if changed\nsince last report)

Check the appropriate box below if the Form 8-K filing\nis intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

\n\n \n \n\n \n \n\n \n \n\n \n \n\n \n \n\n \n \n\n \n \n

¨	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act\n(17 CFR 240.14d-2(b))

¨	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act\n(17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of\nthe Act:

\n\n \n \n \n \n \n\n \n \n \n \n \n

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Shares, par value $0.01		CWT		New York Stock Exchange

Indicate by check mark whether the registrant is an emerging\ngrowth company as defined by Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of\nthe Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth\ncompany, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or\nrevised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

\n \n \n \n

Item 8.01.

Other Events

On\nOctober 28, 2026, California Water Service Group issued a press release (a copy of which is attached hereto as Exhibit 99.1 and incorporated\nherein by reference) announcing the declaration of a quarterly dividend of $0.3350 per common share. The quarterly dividend will be payable\non November 20, 2026 to stockholders of record as of the close of business on November 9, 2026.

\n \n \n \n

Item 9.01.

Financial Statements and Exhibits.

(d) Exhibits.

We hereby file the following exhibit with this\nreport:

\n \n \n \n \n \n \n \n \n \n \n \n \n

Exhibit No.		Description
99.1		Press Release issued October 28, 2026
104		Cover Page Interactive Date File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities\nExchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

	CALIFORNIA WATER SERVICE GROUP

Date: October 28, 2026	By:	/s/ James P. Lynch
	Name:	James P. Lynch
	Title:	Senior Vice President, Chief Financial Officer and Treasurer

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