X0607 3 2026-03-18 0 0001720161 Castor Maritime Inc. CTRM 0002118775 Panagiotidis Petros Panagiotis true 223 CHRISTODOULOU CHATZIPAVLOU STREET, HAWAII ROYAL GARDENS LIMASSOL G4 3036 CYPRUS true true See Remarks Common Shares 11240 I By Thalassa Investment Co. S.A. Series B Preferred Shares 12000 I By Thalassa Investment Co. S.A. The Reporting Person disclaims beneficial ownership in these securities except to the extent he has a pecuniary interest therin and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act of 1934 or for any other purpose. Chairman, Chief Executive Officer and Chief Financial Officer /s/ Petros Panagiotis Panagiotidis 2026-03-18