Company: MSEX
Filing Date: 2025-05-12
Form Type: 424B5
Source: 0001104659-25-047381
Chunk: 6

Company: MIDDLESEX WATER CO
Filing Date: 2025-05-12
Form: 424B5
Chunk 6
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 this prospectus supplement or the respective dates of documents incorporated
by reference herein or therein that include forward-looking statements.

<div align='center'>S-iv

SUMMARY</div>

This summary highlights information contained elsewhere in this prospectus supplement, the accompanying prospectus and the documents incorporated by reference. This summary sets forth the material terms of this offering, but does not contain all of the information you should consider before deciding whether to invest in our common stock. You should read carefully this entire prospectus supplement and the accompanying prospectus, including the documents incorporated by reference in this prospectus supplement and the accompanying prospectus, as described under the headings “Where You Can Find More Information” and “Incorporation by Reference” in this prospectus supplement, before making an investment decision to purchase our common stock. You should also carefully consider the risks of investing in our common stock discussed in the section titled “Risk Factors” in this prospectus supplement as well as the consolidated financial statements and notes to those consolidated financial statements incorporated by reference into this prospectus supplement and the accompanying prospectus.

Middlesex Water Company

Middlesex was incorporated
as a water utility company in 1897 and owns and operates regulated water utility and wastewater systems primarily in New Jersey and Delaware.
Middlesex also operates water and wastewater systems under contract on behalf of municipal and private clients primarily in New Jersey
and Delaware. Across our regulated utility systems, we serve approximately 128,000 customers. We operate water and wastewater systems
under unregulated contracts for governmental entities and private entities.

The terms “the Company,”
“we,” “our,” and “us” refer to Middlesex Water Company and its subsidiaries, including Tidewater Utilities, Inc.
(“Tidewater”) and Tidewater’s wholly-owned subsidiaries, Southern Shores Water Company, LLC (“Southern Shores”)
and White Marsh Environmental Systems, Inc. (“White Marsh”), Pinelands Water Company (“Pinelands Water”)
and Pinelands Wastewater Company (“Pinelands Wastewater”), Utility Service Affiliates, Inc. (“USA”) and Utility
Service Affiliates (Perth Amboy) Inc. (“USA-PA”).

The Company’s principal executive offices are located at 485C Route 1 South, Suite 400, Iselin, New Jersey 08830. Our telephone number is (732) 634-1500. Our website address is http://www.middlesexwater.com. Except as expressly stated herein, no information
contained