Company: CTRM
Filing Date: 2025-04-30
Form Type: NT 20-F
Source: 0001140361-25-016650
Chunk: 0

Company: Castor Maritime Inc.
Filing Date: 2025-04-30
Form: NT 20-F
Chunk 0
---
UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING SEC File Number: 001-38802 CUSIP Number: Y1146L 208

| (Check One): |     | ☐ Form 10-K ☒ Form 20-F ☐ Form 11-K ☐ Form 10-Q 
 ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR           
 For Period Ended:                               | December 31, 2024 |
|:-------------|:----|:------------------------------------------------|:------------------|
|              |     | ☐ Transition Report on Form 10-K                |                   |
|              |     | ☐ Transition Report on Form 20-F                |                   |
|              |     | ☐ Transition Report on Form 11-K                |                   |
|              |     | ☐ Transition Report on Form 10-Q                |                   |
|              |     | For the Transition Period Ended:                |                   |

| Nothing in this form shall be construed to imply that the Commission has verified any information contained herein. |

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates: Not Applicable PART I – REGISTRANT INFORMATION CASTOR MARITIME INC. Full Name of Registrant N/A Former Name if Applicable 223 Christodoulou Chatzipavlou Street, Hawaii Royal Gardens Address of Principal Executive Office (Street and Number) 3036 Limassol, Cyprus City, State and Zip Code PART II – RULES 12b-25(b) AND (c) If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

| ☒   | -a                                                                                                                                                                                                                                           | The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense; |
| (b) | The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-CEN or Form N-CSR, or portion thereof, will be filed on or                                                                       
 before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or