Form 6-K C3is Inc. For: Jun 22
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 June 2026
Commission File Number 001-41717
C3IS INC.
(Translation of registrant’s name into English)
331 Kifissias Avenue, Kifissia 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 ☐
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: June 22, 2026
| C3IS INC. | ||
| By: | /s/ Nina Pyndiah | |
| Name: | Nina Pyndiah | |
| Title: | Chief Financial Officer | |
ATTACHMENTS / EXHIBITS
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