MIDDLESEX WATER CO

The following information updates and amends the information provided in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 in Part I, Item 3—Legal Proceedings. Capitalized terms used but not otherwise defined herein have the meanings set forth in the Company’s Form 10-K.

Vera et al. v. Middlesex Water Company and Lonsk et al. v. Middlesex Water Company and 3M Company– In 2021, the Company was served with two PFOA-related class action lawsuits seeking restitution for medical, water filter replacement and other claimed related costs. On August 30, 2024, the parties to theVera et al. v. Middlesex Water Company (Vera) andLonsk et al v. Middlesex Water Company (Lonsk) litigations entered into a signed Settlement Term Sheet in a step towards resolution of both matters. On March 24, 2025, the parties toVera andLonsk entered into a signed Class Action Settlement Agreement that was subsequently filed with the Superior Court of New Jersey, Law Division (Middlesex County) on April 16, 2025 together with a Motion For Preliminary Approval of the Class Action Settlement Agreement. The Company does not believe that the now-executed and filed Class Settlement Agreement has any material financial or operational impact to Middlesex.