<SEC-DOCUMENT>0001193125-25-070977.txt : 20250402
<SEC-HEADER>0001193125-25-070977.hdr.sgml : 20250402
<ACCEPTANCE-DATETIME>20250402091853
ACCESSION NUMBER:		0001193125-25-070977
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250402
DATE AS OF CHANGE:		20250402

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:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-276868
		FILM NUMBER:		25802372

	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>424B3
<SEQUENCE>1
<FILENAME>d906983d424b3.htm
<DESCRIPTION>424B3
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<TITLE>424B3</TITLE>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Filed Pursuant to Rule 424(b)(3) </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Registration <FONT STYLE="white-space:nowrap">No.&nbsp;333-276868</FONT> </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>PROSPECTUS SUPPLEMENT NO. 3 </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>(TO PROSPECTUS DATED
DECEMBER&nbsp;13, 2024) </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman" ALIGN="center"><B>C3IS INC. </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This is a
supplement (&#147;Prospectus Supplement&#148;) to the prospectus, dated December&nbsp;13, 2024 (&#147;Prospectus&#148;), of C3is Inc. (the &#147;Company&#148;), which forms a part of the Company&#146;s Registration Statement on <FONT
STYLE="white-space:nowrap">Form&nbsp;F-1&nbsp;(Registration</FONT> <FONT STYLE="white-space:nowrap">No.&nbsp;333-276868),&nbsp;as</FONT> amended or supplemented from time to time. This Prospectus Supplement is being filed to update and supplement
the information included in the Prospectus with the information contained in our Report on <FONT STYLE="white-space:nowrap">Form&nbsp;6-K,&nbsp;furnished</FONT> to the U.S. Securities and Exchange Commission on April&nbsp;2, 2025 (the <FONT
STYLE="white-space:nowrap">&#147;Form&nbsp;6-K&#148;).&nbsp;Accordingly,</FONT> we have attached the <FONT STYLE="white-space:nowrap">Form&nbsp;6-K&nbsp;to</FONT> this Prospectus Supplement. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This Prospectus Supplement should be read in conjunction with, and delivered with, the Prospectus and is qualified by reference to the
Prospectus except to the extent that the information in this Prospectus Supplement supersedes the information contained in the Prospectus. This Prospectus Supplement is not complete without, and may not be delivered or utilized except in connection
with, the Prospectus, including any amendments or supplements to it. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:12pt; font-family:Times New Roman"><B>Investing in
our securities involves a high degree of risk. See &#147;<U>Risk Factors</U>&#148; beginning on page 9 of the Prospectus for a discussion of information that should be considered in connection with an investment in our securities. </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or
determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense. </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>The date of
this prospectus supplement is April&nbsp;2, 2025. </B></P>
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 <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P> <P STYLE="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>UNITED STATES </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Washington, D.C. 20549 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B><FONT
STYLE="white-space:nowrap">FORM&nbsp;6-K</FONT> </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>REPORT OF
FOREIGN PRIVATE ISSUER </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B><FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">PURSUANT&nbsp;TO&nbsp;RULE&nbsp;13a-16&nbsp;OR&nbsp;15d-16</FONT></FONT>
</B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>UNDER THE SECURITIES EXCHANGE ACT OF 1934 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>For the month of April&nbsp;2025 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B><FONT STYLE="white-space:nowrap">Commission&nbsp;File&nbsp;Number&nbsp;001-41717</FONT> </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman" ALIGN="center"><B>C3IS INC. </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(Translation
of registrant&#146;s name into English) </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>331 Kifissias
Avenue Erithrea 14561 Athens, Greece </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Address of principal executive office) </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center> <P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether the registrant files or will file annual reports under
<FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">cover&nbsp;of&nbsp;Form&nbsp;20-F&nbsp;or&nbsp;Form&nbsp;40-F.</FONT></FONT> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">Form&nbsp;20-F&#8194;&#9746;&#8195;&#8195;&#8195;Form&nbsp;
40-F&#8194;&#9744;</FONT></FONT> </P> <P STYLE="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>INFORMATION CONTAINED IN THIS FORM <FONT STYLE="white-space:nowrap">6-K</FONT> REPORT
</B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Attached to this report on <FONT STYLE="white-space:nowrap">Form&nbsp;6-K</FONT> as Exhibit&nbsp;99.1 is a copy of C3is Inc.&#146;s (the
&#147;Company&#148;) press release, dated April&nbsp;2, 2025, announcing a <FONT STYLE="white-space:nowrap">one-for-six</FONT> <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">(1-for-6)</FONT></FONT> reverse stock split of the
Company&#146;s common stock, par value $0.01 per share, which will take effect at 11:59 pm Eastern Time on April&nbsp;3, 2025. The Company&#146;s common stock will begin trading on a split-adjusted basis on The Nasdaq Capital Market as of the
opening of trading on April&nbsp;4, 2025.</P> <P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>EXHIBIT INDEX </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="top" NOWRAP>99.1</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top">Press Release dated April&nbsp;2, 2025</TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">***** </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">This
report on Form <FONT STYLE="white-space:nowrap">6-K,</FONT> including exhibit 99.1 hereto, is hereby incorporated by reference into the Company&#146;s Registration Statement on Form <FONT STYLE="white-space:nowrap">S-8</FONT> (Reg. <FONT
STYLE="white-space:nowrap">No.&nbsp;333-273306)&nbsp;filed</FONT> with the Securities and Exchange Commission on July&nbsp;18, 2023 and Registration Statement on Form F-3 (Reg. <FONT STYLE="white-space:nowrap">No.&nbsp;333-285135)</FONT> filed with
the Securities and Exchange Commission on February&nbsp;21, 2025. </P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>SIGNATURES </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">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. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Date: April 2, 2025 </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="top" COLSPAN="3">C3IS INC.</TD></TR>
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<TD VALIGN="bottom">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Nina Pyndiah</P></TD></TR>
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<TD VALIGN="bottom">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Nina Pyndiah</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Chief Financial Officer</TD></TR>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 99.1 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>C3IS INC. ANNOUNCES REVERSE STOCK SPLIT </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><I>To be effective April&nbsp;4, 2025 </I></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><I>Aiming to meet the minimum bid price requirement for maintaining listing on Nasdaq </I></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>ATHENS, GREECE</B>&nbsp;&#150; April&nbsp;2, 2025 &#150; C3IS INC. (the &#147;Company&#148;) (Nasdaq: CISS) today announced that its board of directors has
determined to effect a <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">one-for-six</FONT></FONT> <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">(1-for-6)</FONT></FONT> reverse stock split of the Company&#146;s
common stock, par value $0.01 per share. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The reverse stock split will take effect at 11:59 pm Eastern Time on April&nbsp;3, 2025, and the Company&#146;s
common stock will begin trading on a split-adjusted basis on The Nasdaq Capital Market (&#147;Nasdaq&#148;) as of the opening of trading on April&nbsp;4, 2025.&nbsp;The CUSIP number of Y18284 169 will be assigned to the Company&#146;s common stock
when the reverse stock split becomes effective. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">When the reverse stock split becomes effective, every six (6)&nbsp;of the Company&#146;s issued shares of
common stock will be combined into one issued share of common stock, without any change to the par value per share.&nbsp;This will reduce the number of outstanding shares of common stock from approximately 4.2&nbsp;million shares to approximately
0.7&nbsp;million shares. The Company&#146;s outstanding warrants and Series A Convertible Preferred Stock will be proportionately adjusted to increase the exercise price and reduce the number of shares issuable upon exercise. With respect to the
Company&#146;s Class&nbsp;B Warrants and Class&nbsp;C Warrants, the exercise price and number of shares issuable upon exercise will be adjusted further in an adjustment period ending on the fifth trading day after the effective time of the reverse
split pursuant to the terms of such warrants. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">No fractional shares will be issued in connection with the reverse stock split. Stockholders who would
otherwise hold a fraction of a share of common stock of the Company will receive a cash payment in lieu thereof at a price equal to that fraction of a share to which the stockholder would otherwise be entitled, multiplied by the closing price of the
Company&#146;s common stock on Nasdaq on April&nbsp;3, 2025 (as adjusted for the reverse split). </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Stockholders with shares held in book-entry form or
through a bank, broker, or other nominee are not required to take any action and will see the consequence of the reverse stock split reflected in their accounts on or after April&nbsp;4, 2025.&nbsp;Such beneficial holders may contact their bank,
broker, or nominee for more information. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The reverse stock split ratio approved by the board of directors is within the range of ratios for a reverse
stock split authorized by the stockholders of the Company. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The purpose of the reverse stock split is to increase the market price of the Company&#146;s
common stock. The Company believes that the reverse stock split will increase the market price for its common stock and allow it to satisfy the minimum bid price requirement for maintaining listing on Nasdaq. </P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Forward-Looking Statements </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Matters discussed in this
release may constitute forward-looking statements within the meaning of the safe harbor provisions of Section&nbsp;27A of the Securities Act of 1933 and Section&nbsp;21E of the Securities Exchange Act of 1934, including statements with respect to
the C3is Inc.&#146;s ability to maintain compliance with Nasdaq&#146;s continued listing standards and remain listed on Nasdaq or other major stock exchange and other statements that are forward looking. Forward-looking statements reflect our
current views with respect to future events and financial performance and may include statements concerning plans, objectives, goals, strategies, future events or performance and underlying assumptions and other statements, which are other than
statements of historical facts. The forward-looking statements in this release are based upon various assumptions. Although C3is Inc. believes that these assumptions </P>
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were reasonable when made, because these assumptions are inherently subject to significant uncertainties and contingencies which are difficult or impossible to predict and are beyond our control,
C3is Inc. cannot assure you that it will achieve or accomplish these expectations, beliefs or projections. Important factors that, in our view, could cause actual results to differ materially from those discussed in the forward-looking statements
include risks discussed in our filings with the U.S. Securities and Exchange Commission (the &#147;SEC&#148;) and the following: the strength of world economies and currencies, global market conditions, including changes in charter hire rates and
vessel values, charter counterparty performance, changes in demand that may affect attitudes of time charterers to scheduled and unscheduled <FONT STYLE="white-space:nowrap">dry-dockings,</FONT> shipyard performance, changes in C3is Inc.&#146;s
operating expenses, including bunker prices, drydocking and insurance costs, ability to fund the remaining purchase price for one of our drybulk vessels, ability to obtain financing and comply with covenants in our financing arrangements, actions
taken by regulatory authorities, potential liability from pending or future litigation, domestic and international political conditions, the conflict in Ukraine and related sanctions, the conflict in Israel and Gaza, potential disruption of shipping
routes due to ongoing attacks by Houthis in the Red Sea and Gulf of Aden or accidents and political events or acts by terrorists. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Risks and uncertainties
are further described in reports filed by C3is Inc. with the SEC. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>ABOUT C3IS INC. </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">C3is Inc. is a ship-owning company providing dry bulk and crude oil seaborne transportation services. The Company owns four vessels, three handysize drybulk
carriers with a total capacity of 97,664 deadweight tons (dwt) and an Aframax oil tanker with a cargo carrying capacity of approximately 115,800 dwt, resulting with a fleet total capacity of 213,464 dwt. C3is Inc.&#146;s shares of Common Stock are
listed on the Nasdaq Capital Market and trade under the symbol &#147;CISS.&#148; </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">For further information, please contact: </P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Company Contact: </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Nina Pyndiah </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Chief Financial Officer </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">C3is INC. </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">00-30-210-6250-001</FONT></FONT>
</FONT></FONT> </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><FONT STYLE="white-space:nowrap">E-mail:</FONT> info@c3is.pro </P>
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