UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13A-16 OR 15D-16 OF
THE SECURITIES EXCHANGE ACT OF 1934
For the month of July 2025
Commission File Number: 001-38802
CASTOR MARITIME INC.
(Translation of registrant’s name into English)
223 Christodoulou Chatzipavlou Street, Hawaii Royal Gardens, 3036 Limassol, Cyprus
(Address of principal executive office)
Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
INFORMATION CONTAINED IN THIS FORM 6-K REPORT
Castor Maritime Inc.’s subsidiary, MPCC CSI LTD., a company affiliated with MPC Capital AG, has acquired 3.44% shares in MPC Container Ships ASA
(“MPCC”), resulting in MPC Capital AG and its affiliated entities, collectively increasing their holding of total shares and voting rights in MPCC from approximately 16.68% to 20.12%, or 89,260,056 shares. MPC Capital AG is the founding shareholder
of MPCC.
Attached to this report on Form 6-K as Exhibit 99.1 is a copy of the notification of major
holdings.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.
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CASTOR MARITIME INC.
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Dated: July 7, 2025
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By:
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/s/ Petros Panagiotidis
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Petros Panagiotidis
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Chairman, Chief Executive Officer and Chief Financial Officer
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