<SEC-DOCUMENT>0000950123-25-006492-index.html : 20250903
<SEC-HEADER>0000950123-25-006492.hdr.sgml : 20250903
<ACCEPTANCE-DATETIME>20250721132437
<PRIVATE-TO-PUBLIC>
ACCESSION NUMBER:		0000950123-25-006492
CONFORMED SUBMISSION TYPE:	DRS
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20250721
<PUBLIC-REL-DATE>20250903
DATE AS OF CHANGE:		20250721

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			C3is Inc.
		CENTRAL INDEX KEY:			0001951067
		STANDARD INDUSTRIAL CLASSIFICATION:	DEEP SEA FOREIGN TRANSPORTATION OF FREIGHT [4412]
		ORGANIZATION NAME:           	01 Energy & Transportation
		EIN:				000000000
		STATE OF INCORPORATION:			1T
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DRS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	377-08236
		FILM NUMBER:		251136644

	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>DRS
<SEQUENCE>1
<FILENAME>filename1.htm
<TEXT>
Document 1 - file: filename1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>filename2.htm
<TEXT>
Document 2 - file: filename2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.2
<SEQUENCE>3
<FILENAME>filename3.htm
<TEXT>
Document 3 - file: filename3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g922591dsp_109.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g922591dsp_109.jpg

</DOCUMENT>
</SEC-DOCUMENT>