C3is Inc. (CISS) director Georgios Xiradakis files initial Form 3

Rhea-AI Filing Summary

C3is Inc. director Georgios Xiradakis filed an initial Form 3, which is a required statement of beneficial ownership for insiders. The filing reports no transactions and shows no equity transactions or derivative positions, indicating this is a baseline disclosure rather than a new trade.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Xiradakis Georgios

(Last) (First) (Middle)

C3IS INC.

331 KIFISSIAS AVENUE ERITHREA

(Street)

ATHENS GREECE 14561

(City) (State) (Zip)

GREECE

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
C3is Inc. [ CISS ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24 - Power of Attorney

No securities are beneficially owned.

	/s/ Nina Pyndiah, Attorney-in-Fact	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does the C3is (CISS) Form 3 filed by Georgios Xiradakis show?

The Form 3 for C3is Inc. (CISS) is an initial beneficial ownership report for director Georgios Xiradakis. It shows no reported purchases, sales, or derivative positions, serving mainly as a baseline disclosure of his insider status.

Did Georgios Xiradakis buy or sell C3is (CISS) shares in this Form 3?

No, the Form 3 reports no share purchases or sales by Georgios Xiradakis. Transaction counts and share amounts for buys, sells, exercises, gifts, and tax withholding are all zero in the summarized data.

Are there any derivative securities reported for C3is (CISS) in this Form 3?

No derivative securities are listed for C3is Inc. (CISS) in this Form 3. The derivative summary is empty and derivative transaction counts, including exercises, are all zero, indicating no options or similar instruments are reported here.

What is the purpose of this C3is (CISS) Form 3 filing for Georgios Xiradakis?

This Form 3 establishes initial beneficial ownership status for director Georgios Xiradakis at C3is Inc. It fulfills insider reporting requirements and records that, as of this filing, there are no reported equity or derivative transactions associated with him.

Does the C3is (CISS) Form 3 include any gifts or tax-related share dispositions?

No, the filing shows no gifts or tax-withholding dispositions. Gift-related share counts and tax-withholding share counts are zero, indicating no non-market transfers or tax-driven share movements are reported for this insider in this Form 3.