Results of Operations and Financial Condition. On July 30, 2026, Middlesex Water Company announced its financial results for the quarter ended June 30, 2026. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference. The information in Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject…

Results of Operations and Financial Condition. On April 30, 2026, Middlesex Water Company announced its financial results for the quarter ended March 31, 2026. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference. The information in Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subje…

Vice President and Chief Accounting Officer — Tatyana Kaplan: Tatyana Kaplan was promoted to Vice President and Chief Accounting Officer.

Entry into a Material Definitive Agreement. On February 20, 2026, Middlesex Water Company (“ Middlesex ”) entered into an Amendment (the “ Amendment ”) to the ATM Equity Offering SM Sales Agreement (as amended, the “ Equity Sales Agreement ”) with BofA Securities, Inc., Robert W. Baird & Co. Incorporated, Huntington Securities, Inc. (“ Huntington ”), and Janney Montgomery Scott LLC (“ Janney ”), relating to Middlesex’s ongoing sale of shares of Middlesex common stock, no par value, from time…

Results of Operations and Financial Condition. On February 19, 2026, Middlesex Water Company announced its financial results for the fourth quarter and year ended 2025. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference. The information in Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherw…

Director — Robert Hoglund: The filing discloses the election of a new independent director and routine amendments to executive employment agreements, with no indication of a senior executive departure.

Results of Operations and Financial Condition. On October 31, 2025, Middlesex Water Company announced its financial results for the quarter ended September 30, 2025. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference. The information in Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise…

Results of Operations and Financial Condition. On July 31, 2025, Middlesex Water Company announced its financial results for the quarter ended June 30, 2025. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference. The information in Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject…

Entry into a Material Definitive Agreement. On May 12, 2025, Middlesex Water Company (“ Middlesex ”) entered into an ATM Equity Offering SM Sales Agreement (the “ Equity Sales Agreement ”) with BofA Securities, Inc., Robert W. Baird & Co. Incorporated, and Janney Montgomery Scott LLC, as sales agents and/or principal (each, a “ Sales Agent ” and collectively, the “ Sales Agents ”), to sell shares of Middlesex common stock, no par value (the “ Common Stock ”), from time to time at the then pre…

Results of Operations and Financial Condition. On May 1, 2025, Middlesex Water Company announced its financial results for the quarter ended March 31, 2025. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference. The information in Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject…

Changes in Registrant’s Certifying Accountant. Dismissal of Independent Registered Public Accounting Firm On February 28, 2025, the Audit Committee of the Board of Directors of Middlesex Water Company (the “Company”) dismissed Baker Tilly US, LLP (“Baker Tilly”) as the Company’s independent registered public accounting firm, effective March 3, 2025. The audit reports of Baker Tilly on the Company’s consolidated financial statements as of and for the years ended December 31, 2024 and 2023 did…

Results of Operations and Financial Condition. On February 28, 2025, Middlesex Water Company announced its financial results for the year ended 2024. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference. The information in Item 2.02, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the…

CEO — Nadine Leslie: The filing discloses the renewal and amendment of Change in Control severance agreements for executives, which is a compensatory arrangement rather than a change in personnel or management departure.

Results of Operations and Financial Condition. On October 31, 2024, Middlesex Water Company announced its financial results for the quarter ended September 30, 2024. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference.

Other Events. On October 24, 2024, the Board of Directors of Middlesex Water Company (the "Company") declared a quarterly cash dividend of $0.34 per share on its common stock, a 4.62% increase from the $0.325 per share dividend last declared in July 2024. The dividend at the new rate is payable on December 2, 2024 to shareholders of record as of November 15, 2024. A copy of the press release announcing the dividend declaration is attached hereto as Exhibit 99.1 and incorporated into this Form…

Vice President – Corporate Affairs — Bernadette M. Sohler: The filing announces the planned retirement of a Vice President after 30 years of service, which is an orderly succession rather than a sudden loss of a top executive.

Results of Operations and Financial Condition. On July 31, 2024, Middlesex Water Company announced its financial results for the quarter ended June 30, 2024. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference.

Other Events. On July 23, 2024, the Board of Directors of Middlesex Water Company (the "Company") announced the declaration of a quarterly cash dividend of $0.325 per share on its common stock, payable on September 3, 2024 to shareholders of record as of August 15, 2024. A copy of the press release announcing the dividend declaration is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference

Results of Operations and Financial Condition. On May 8, 2024, Middlesex Water Company announced its financial results for the quarter ended March 31, 2024. A copy of the press release announcing these results is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference.

Other Events. On April 25, 2024, the Board of Directors of Middlesex Water Company (the "Company") announced the declaration of a quarterly cash dividend of $0.325 per share on its common stock, payable on June 3, 2024 to shareholders of record as of May 15, 2024. A copy of the press release announcing the dividend declaration is attached hereto as Exhibit 99.1 and incorporated into this Form 8-K by reference.