<SEC-DOCUMENT>0001193125-23-173887-index.html : 20230623
<SEC-HEADER>0001193125-23-173887.hdr.sgml : 20230623
<ACCEPTANCE-DATETIME>20230623164557
ACCESSION NUMBER:		0001193125-23-173887
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20230623
FILED AS OF DATE:		20230623
DATE AS OF CHANGE:		20230623

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			C3is Inc.
		CENTRAL INDEX KEY:			0001951067
		STANDARD INDUSTRIAL CLASSIFICATION:	DEEP SEA FOREIGN TRANSPORTATION OF FREIGHT [4412]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			1T
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-41717
		FILM NUMBER:		231038373

	BUSINESS ADDRESS:	
		STREET 1:		331 KIFISSIAS AVENUE
		STREET 2:		ERITHREA
		CITY:			ATHENS
		STATE:			J3
		ZIP:			14561
		BUSINESS PHONE:		011-30-210-625-0001

	MAIL ADDRESS:	
		STREET 1:		331 KIFISSIAS AVENUE
		STREET 2:		ERITHREA
		CITY:			ATHENS
		STATE:			J3
		ZIP:			14561
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>d448408d6k.htm
<DESCRIPTION>6-K
<TEXT>
Document 1 - file: d448408d6k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d448408dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: d448408dex991.htm

</DOCUMENT>
</SEC-DOCUMENT>