Company: MSEX
Filing Date: 2025-04-10
Form Type: DEFA14A
Source: 0001174947-25-000562
Chunk: 0

Company: MIDDLESEX WATER CO
Filing Date: 2025-04-10
Form: DEFA14A
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

The Securities Exchange Act of 1934 (Amendment No. )</div>

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |

| ☐ | Definitive Proxy Statement |

| ☒ | Definitive Additional Materials |

| ☐ | Soliciting Material Pursuant to §240.14a-12 |

<div align='center'>Middlesex Water Company

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if other
than the Registrant)</div>

Payment of Filing Fee (Check the appropriate box):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

IDDLESEX
ATER COMPANY
Your Vote Counts!
MIDDLESEX WATER COMPANY
2025 Annual Meeting
Vote by May 19, 2025
11:59 PM ET
485C ROUTE 1 SOUTH SUITE 400
ISELIN, NJ 08830
You invested in MIDDLESEX WATER COMPANY and it's time to vote!
You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on May 20, 2025.
Get informed before you vote
View the Notice & Proxy Statement, Annual Report on line OR you can receive a free paper or email copy of the material(s) by requesting prior to May 06, 2025. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested,