Company: MSEX
Filing Date: 2025-03-11
Form Type: 10-K/A
Source: 0001174947-25-000318
Chunk: 0

Company: MIDDLESEX WATER CO
Filing Date: 2025-03-11
Form: 10-K/A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K/A Amendment No. 1 (Mark One)

| ☑ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

For the fiscal year ended December 31, 2024 OR

| ☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|   | For the transition period from _________________ to ______________________               |

Commission File Number 0-422 MIDDLESEX WATER COMPANY (Exact name of registrant as specified in its charter)

| New Jersey               | 22-1114430                       |
| (State of Incorporation) | -IRS employer identification no. |

485C Route 1 South, Suite 400, Iselin New Jersey 08830 (Address o f principal executive offices, including zip code) (732) 634-1500 (Registrant's telephone number, including area code) Securities registered pursuant to Section 12(b) of the Act:

| Title of Each Class:       | Trading Symbol: | Name of each exchange on which registered: |
| Common Stock, No Par Value | MSEX            | The NASDAQ Stock Market, LLC               |

Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes☑ No ☐ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No☑ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes☑ No ☐ Indicate by check mark whether the registrant has submitted electronically and posted on their corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrants were required