C3

C3is Inc.

  • CIK: 0001951067
  • EIN: 00-0000000
  • Business address: 331 KIFISSIAS AVENUE, ERITHREA, ATHENS, Greece, 14561

Information

  • Mailing address
    331 KIFISSIAS AVENUE, ERITHREA, ATHENS, Marshall Islands, 14561
  • Phone
    011-30-210-625-0001
  • State location
    Greece
  • State of incorporation
    Marshall Islands
  • Fiscal year end
    December 31
  • SIC
    4412 - (CF Office: Office of Energy & Transportation) DEEP SEA FOREIGN TRANSPORTATION OF FREIGHT
  • Filings
    N/A

About C3is Inc.

C3is Inc. (CIK: 0001951067) is an American company incorporated in the state of Greece. Head office is located at 331 KIFISSIAS AVENUE, ERITHREA, ATHENS, Greece, 14561. Work in the industry 4412 - (CF Office: Office of Energy & Transportation) DEEP SEA FOREIGN TRANSPORTATION OF FREIGHT. C3is Inc. is a public company and trade via Over-The-Counter (OTC).

Ownership

Updating!

Stock Chart

Coming soon!

Jobs

Coming soon!

Recent SEC Filings

Includes all SEC registration details as well as a list of all documents (S-1, Prospectus, Current Reports, 8-K, 10K, Annual Reports) filed by C3is Inc.

Filings Format Description Filed/Effective File/Film Number
SCHEDULE 13G/A Document Acc-no: 0000898432-26-000030 (34 Act) Size: KB Jan-13-2026

005-94125

26530388
SCHEDULE 13G Document Acc-no: 0001909404-26-000002 (34 Act) Size: KB Jan-08-2026

005-94125

26518597
SCHEDULE 13D/A Document Acc-no: 0001193125-25-337230 (34 Act) Size: KB Dec-30-2025

005-94125

251614960
424B3 Document

Prospectus filed pursuant to Rule 424(b)(3)

Acc-no: 0001193125-25-327072 (33 Act) Size: KB		 Dec-19-2025

333-290011

251588515
424B3 Document

Prospectus filed pursuant to Rule 424(b)(3)

Acc-no: 0001193125-25-327054 (33 Act) Size: KB		 Dec-19-2025

333-272939

251588449
424B3 Document

Prospectus filed pursuant to Rule 424(b)(3)

Acc-no: 0001193125-25-327050 (33 Act) Size: KB		 Dec-19-2025

333-276868

251588428
424B3 Document

Prospectus filed pursuant to Rule 424(b)(3)

Acc-no: 0001193125-25-327043 (33 Act) Size: KB		 Dec-19-2025

333-276430

251588387
6-K Document

Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Acc-no: 0001193125-25-326806 (34 Act) Size: KB		 Dec-19-2025

001-41717

251587512
EFFECT Document Acc-no: 9999999995-25-003823 (33 Act) Size: KB Dec-18-2025

333-276868

251584842
EFFECT Document Acc-no: 9999999995-25-003822 (33 Act) Size: KB Dec-18-2025

333-276430

251584841
EFFECT Document Acc-no: 9999999995-25-003820 (33 Act) Size: KB Dec-18-2025

333-272939

251584838
SCHEDULE 13G Document Acc-no: 0001079973-25-001874 (34 Act) Size: KB Dec-18-2025

005-94125

251583880
SCHEDULE 13G Document Acc-no: 0001079973-25-001866 (34 Act) Size: KB Dec-17-2025

005-94125

251579627
POS AM Document

Post-effective amendment to a registration statement that is not immediately effective upon filing

Acc-no: 0001193125-25-319448 (33 Act) Size: KB		 Dec-15-2025

333-272939

251572576
POS AM Document

Post-effective amendment to a registration statement that is not immediately effective upon filing

Acc-no: 0001193125-25-319443 (33 Act) Size: KB		 Dec-15-2025

333-276430

251572560
POS AM Document

Post-effective amendment to a registration statement that is not immediately effective upon filing

Acc-no: 0001193125-25-319438 (33 Act) Size: KB		 Dec-15-2025

333-276868

251572546
SCHEDULE 13D/A Document Acc-no: 0001193125-25-318341 (34 Act) Size: KB Dec-15-2025

005-94125

251569903
6-K Document

Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Acc-no: 0001193125-25-317644 (34 Act) Size: KB		 Dec-12-2025

001-41717

251568567
424B4 Document

Prospectus filed pursuant to Rule 424(b)(4)

Acc-no: 0001193125-25-316168 (33 Act) Size: KB		 Dec-11-2025

333-290011

251565657
EFFECT Document Acc-no: 9999999995-25-003623 (33 Act) Size: KB Dec-10-2025

333-290011

251563403

Recent 20 filings. View all C3is Inc. filings

Reviews

Overall rating 5.0

Aug 22, 2022

Ryan Storey

Huge help thank you for your help .. y'all make it so much easier

Aug 22, 2022

Catherine

Thanks I look forward to using the product to improve my skin tone

Aug 22, 2022

Samuel Ejimofor

It's being easier working on the website. And I recommend, it's a great website

Frequently Asked Questions

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Disclaimer: The information on the Service is provided with the understanding that the Company is not herein engaged in rendering legal, accounting, tax, or other professional advice and services. As such, it should not be used as a substitute for consultation with professional accounting, tax, legal or other competent advisers.

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