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
UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of May 2025
Commission File Number 001-41717
C3IS INC.
(Translation of registrant’s name into English)
331 Kifissias Avenue Erithrea 14561 Athens, Greece
(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.
Form 20-F ☒ Form 40-F ☐
INFORMATION CONTAINED IN THIS FORM 6-K REPORT
Financial and Operating Results for the three months ended March 31, 2025
Attached to this report on Form 6-K as Exhibit 99.1 is a copy of C3is Inc.’s (the “Company”) press release, dated May 15, 2025, announcing its financial and operating results for the three months ended March 31, 2025.
EXHIBIT INDEX
| 99.1 | Press Release dated May 15, 2025 |
*****
This report on Form 6-K, including exhibit 99.1 hereto other than the section entitled “CEO Dr. Diamantis Andriotis Commented:”, is hereby incorporated by reference into the Company’s Registration Statement on Form S-8 (Reg. No. 333-273306) filed with the Securities and Exchange Commission on July 18, 2023 and Registration Statement on Form F-3 (Reg. No. 333- 285135) filed with the Securities and Exchange Commission on February 21, 2025.
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.
Date: May 16, 2025
| C3IS INC. | ||
| By: | /s/ Nina Pyndiah | |
| Name: | Nina Pyndiah | |
| Title: | Chief Financial Officer | |