Exhibit 99.2

  C3IS INC. 331 KIFISSIAS AVE. 14561 ATHENS, GREECE     VOTE BY INTERNET - www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. Eastern Time the day before the cut-off date or meeting date. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form.   ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS If you would like to reduce the costs incurred by our company in mailing proxy materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronically via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet and, when prompted, indicate that you agree to receive or access proxy materials electronically in future years.   VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions up until 11:59 p.m. Eastern Time the day before the cut-off date or meeting date. Have your proxy card in hand when you call and then follow the instructions.   VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.  

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:

                                           V56219-P17751 KEEP THIS PORTION FOR YOUR RECORDS

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DETACH AND RETURN THIS PORTION ONLY

THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED.

C3IS INC.			For All	Withhold All	For All Except	To withhold authority to vote for any individual nominee(s), mark “For All Except” and write the number(s) of the nominee(s) on the line below.
	The Board of Directors recommends you vote FOR the following:
			☐	☐	☐
	1.  Election of Directors    Nominee:
	01) John Kostoyannis
The Board of Directors recommends you vote FOR the following proposal:							For	Against	Abstain
	2.  Ratification of appointment of Deloitte Certified Public Accountants S.A. as the Company’s independent auditors for the year ending December 31, 2024.						☐	☐	☐
NOTE: Such other business as may properly come before the meeting or any adjournment thereof.
Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer.

Signature [PLEASE SIGN WITHIN BOX]      Date			Signature (Joint Owners)            Date

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting:

The Notice and Proxy Statement and Annual Report are available at www.proxyvote.com.

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	C3IS INC. ANNUAL MEETING OF STOCKHOLDERS October 14, 2024, 11:00 a.m. Greek Local Time
	THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
The stockholder(s) hereby appoint(s) Dr. Diamantis Andriotis and Nina Pyndiah, or either of them, as proxies, each with the power to appoint (his/her) substitute, and hereby authorize(s) them to represent and to vote, as designated on the reverse side of this ballot, all of the shares of Common Stock or Series A Convertible Preferred Stock of C3IS INC. that the stockholder(s) is/are entitled to vote at the Annual Meeting of Stockholders to be held on Monday, October 14, 2024 at 11:00 a.m. Greek local time, at the Company’s principal executive offices at 331 Kifissias Avenue, Erithrea 14561 in Athens, Greece, and any adjournment or postponement thereof.
This proxy, when properly executed, will be voted in the manner directed herein. If no such direction is made, this proxy will be voted in accordance with the Board of Directors’ recommendations.
	CONTINUED AND TO BE SIGNED ON REVERSE SIDE

	Your Vote Counts!
C3IS INC.               331 KIFISSIAS AVE.               14561 ATHENS, GREECE	C3IS INC. 2024 Annual Meeting Vote by October 13, 2024 11:59 PM ET
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You invested in C3IS INC. and it’s time to vote!

You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on October 14, 2024.

Get informed before you vote

View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to September 30, 2024. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy.

*Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

 Vote at www.ProxyVote.com

 THIS IS NOT A VOTABLE BALLOT

This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters.

 

Voting Items		Board Recommends
1.  Election of Director
	Nominee:
	01)  John Kostoyannis
2.  Ratification of appointment of Deloitte Certified Public Accountants S.A. as the Company’s independent auditors for the year ending December 31, 2024.
NOTE: Such other business as may properly come before the meeting or any adjournment thereof.

Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”.

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