Table of Contents Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Form F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 C3is Inc. (Exact name of registrant as specified in its charter) Republic of the Marshall Islands 4412 N/A (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) (I.R.S. Employer Identification No.) 331 Kifissias Avenue Erithrea 14561 Athens, Greece (Address of principal ...