Company: MSEX
Filing Date: 2025-05-12
Form Type: S-3ASR
Source: 0001104659-25-047075
Chunk: 0

Company: MIDDLESEX WATER CO
Filing Date: 2025-05-12
Form: S-3ASR
Chunk 0
---
<div align='center'>As filed with the Securities and Exchange Commission on May 12, 2025</div>

Registration No. 333-___________

<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENTUnder
THE SECURITIES ACT OF 1933

MIDDLESEX WATER COMPANY

(Exact name of registrant as specified in its charter)</div>

| New Jersey                                                     | 22-1114430                          |
| (State or other jurisdiction of incorporation or organization) | -I.R.S. Employer Identification No. |

<div align='center'>485C Route 1 South, Suite 400

Iselin, New Jersey 08830

(732) 634-1500(Address, including zip code, and telephone number, including
area code, of registrant’s principal executive offices)

Jay L. Kooper, Esq.
Vice President, General Counsel and Secretary
Middlesex WaterCompany
485C Route 1 South, Suite 400

Iselin, New Jersey 08830

(732) 634-1500

(Name, address, including zip code. and telephone
number,
including area code, of agent for service)

With Copies to:

George A. Naya, Esq.

Michael A. Gold, Esq.

Saul Ewing LLP

1919 Pennsylvania Avenue, N.W., Suite 550

Washington, DC 20006

(202) 333-8800</div>

Approximate date of commencement of proposed sale to the public:From time to time after the effective date of this registration statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.¨

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or reinvestment plans, check the following box. x

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective, registration statement for the same offering.¨

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act