Company Update

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: February 16, 2024   MIDDLESEX WATER COMPANY (Exact name of registrant as specified in its charter)   New Jersey 0-422 22-1114430 (State or other jurisdiction of (Commission (I.R.S. Employer incorporation or organization) File Number) Identification No.)   485C Route 1 South , Suite 400 , Iselin , New Jersey 08830 (Address of Principal Executive Offices) (Zip Code)   732 - 634-1500 (Registrant’s telephone number, including area code)   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: ☐ 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 (17 CFR 240.14d-2(b))   ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock MSEX NASDAQ Indicate by check mark whether the registrant is an emerging growth company as defined in 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. ☐         Item. 8.01.    Other Events   Announcement that on February 14, 2024, Middlesex Water Company received approval from the New Jersey Board of Public Utilities of a $15.4 million or 14.06% increase in its base water rates effective March 1, 2024. The new rates are designed to allow for a 6.64% overall rate of return on invested capital on rate base of $563 million. The return on equity portion of the rate of return was set at 9.6%. As a result of the NJBPU’s approval of the rate increase, Middlesex will not implement provisional rates which, in the absence of a NJBPU Order, were previously scheduled to go into effect on February 15, 2024.       SIGNATURE     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf of the undersigned hereunto duly authorized.         MIDDLESEX WATER COMPANY                      (Registrant)                       /s/A. Bruce O’Connor                       A. Bruce O’Connor   Sr. Vice President, Treasurer and   Chief Financial Officer     Dated: February 16, 2024