UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

Current Report Pursuant to Section 13 or 15(d) of
The Securities Exchange Act of 1934

Date of Report (date of earliest event reported): February 2, 2024

CALIFORNIA WATER SERVICE GROUP

(Exact name of Registrant as Specified in its Charter) 

(408) 367-8200

(Registrant’s telephone number, including area code)

N/A

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

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

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

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

Emerging growth company ¨

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

On February 2, 2024, California Water Service Company, the Registrant’s California regulated utility subsidiary (“Cal Water”), received a letter from the California Public Utilities Commission (the “CPUC”) addressed jointly to Cal Water and three other Class A water companies (California-American Water Company, Golden State Water Company, and San Jose Water Company, collectively with Cal Water, the “Joint Parties”), granting the Joint Parties’ request for a one-year extension in their cost of capital filing with the CPUC to May 1, 2025. The Water Cost of Capital Mechanisms will remain in effect during the one-year extension.

The information furnished pursuant to Item 7.01 of this Current Report shall not be deemed "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

SIGNATURES

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