C3is Inc. SEC filings

Filings

Every filing, newest first. MAJOR and NOTABLE filings lead the app's feed; ROUTINE ones are kept here.

1. ROUTINEPOS AMC3is Inc.CISSOct 5

   C3is Inc. files POS AM

   • Filed on 2026-10-05
   • Updates registration statement for 4,672 common shares
   • Includes Class D and E Warrants
2. ROUTINEPOS AMC3is Inc.CISSOct 5

   C3is Inc. files POS AM

   • Filed on 2026-10-05
   • Updates registration statement for $4,465,067 in common shares
   • Includes exercise of Class C-1 and C-2 warrants
3. ROUTINEPOS AMC3is Inc.CISSOct 5

   C3is Inc. files POS AM

   • Filed on 2026-10-05
   • Updates registration statement for Class B-1 and B-2 Warrants
   • Warrants exercisable for up to $6,533,324 in common stock
4. ROUTINESCHEDULE 13G/AC3is Inc.CISSOct 5

   2 13G filings

   Ownership stake disclosure (amended)

   Show all 2

   • SCHEDULE 13G/AOwnership stake disclosure (amended)Oct 5
   • SCHEDULE 13G/AOwnership stake disclosure (amended)Oct 5

   Alta Partners LLC

5. ROUTINESCHEDULE 13G/AC3is Inc.CISSOct 2

   C3is Inc. reports 0 ownership

   • 0 shares beneficially owned
   • 0.0% percent of class
   • Towerview LLC reported

   TOWERVIEW LLC

6. ROUTINE6-KC3is Inc.CISSSep 29

   Foreign issuer report

7. ROUTINESCHEDULE 13GC3is Inc.CISSSep 3

   Ownership stake disclosure by Timothy P Horne

   Timothy P Horne, filed by

8. NOTABLESCHEDULE 13D/AC3is Inc.CISSAug 28

   Ownership stake disclosure by Imperial Petroleum Inc./Marshall Islands (amended)

   Imperial Petroleum Inc./Marshall Islands, filed by

9. ROUTINE424B3C3is Inc.CISSAug 27

   5 structured-note prospectuses

   Securities offering

   Show all 5

   • 424B3Securities offeringAug 27
   • 424B3Securities offeringAug 27
   • 424B3Securities offeringAug 27
   • 424B3Securities offeringAug 27
   • 424B3Securities offeringAug 27
10. ROUTINE6-KC3is Inc.CISSAug 27

    Foreign issuer report

11. ROUTINE424B3C3is Inc.CISSAug 19

    5 structured-note prospectuses

    Securities offering

    Show all 5

    • 424B3Securities offeringAug 19
    • 424B3Securities offeringAug 19
    • 424B3Securities offeringAug 19
    • 424B3Securities offeringAug 19
    • 424B3Securities offeringAug 19
12. ROUTINESCHEDULE 13GC3is Inc.CISSAug 19

    Ownership stake disclosure by JANE STREET GROUP, LLC

    JANE STREET GROUP, LLC, filed by

13. ROUTINE6-KC3is Inc.CISSAug 19

    Foreign issuer report

14. ROUTINE6-KC3is Inc.CISSAug 17

    Foreign issuer report

15. ROUTINESCHEDULE 13G/AC3is Inc.CISSAug 14

    Ownership stake disclosure by L1 Capital Global Opportunities Master Fund, Ltd. (amended)

    L1 Capital Global Opportunities Master Fund, Ltd., filed by

16. ROUTINESCHEDULE 13G/AC3is Inc.CISSAug 14

    Ownership stake disclosure by S.H.N. Financial Investments Ltd. (amended)

    S.H.N. Financial Investments Ltd., filed by

17. ROUTINESCHEDULE 13GC3is Inc.CISSAug 4

    Ownership stake disclosure by Ascent Partners Fund LLC

    Ascent Partners Fund LLC, filed by

18. ROUTINESCHEDULE 13G/AC3is Inc.CISSAug 3

    Ownership stake disclosure by Alta Partners LLC (amended)

    Alta Partners LLC, filed by

19. ROUTINESCHEDULE 13GC3is Inc.CISSAug 3

    Ownership stake disclosure by CVI Investments, Inc.

    CVI Investments, Inc., filed by

20. ROUTINESCHEDULE 13GC3is Inc.CISSJul 31

    Ownership stake disclosure by Lind Global Fund III LP

    Lind Global Fund III LP, filed by

21. NOTABLESCHEDULE 13D/AC3is Inc.CISSJul 30

    Ownership stake disclosure by Imperial Petroleum Inc./Marshall Islands (amended)

    Imperial Petroleum Inc./Marshall Islands, filed by

22. ROUTINE424B3C3is Inc.CISSJul 28

    6 structured-note prospectuses

    Securities offering

    Show all 6

    • 424B3Securities offeringJul 28
    • 424B3Securities offeringJul 28
    • 424B3Securities offeringJul 28
    • 424B3Securities offeringJul 28
    • 424B3Securities offeringJul 28
    • 424B3Securities offeringJul 28
23. ROUTINE6-KC3is Inc.CISSJul 28

    Foreign issuer report

24. ROUTINE424B4C3is Inc.CISSJul 28

    Securities offering

25. ROUTINEEFFECTC3is Inc.CISSJul 28

    Registration declared effective

26. ROUTINE6-KC3is Inc.CISSJul 27

    Foreign issuer report

27. ROUTINEF-1/AC3is Inc.CISSJul 23

    Securities offering (amended)

28. NOTABLEF-1C3is Inc.CISSJul 22

    Securities offering

29. ROUTINE6-KC3is Inc.CISSJul 22

    Foreign issuer report

30. NOTABLESCHEDULE 13D/AC3is Inc.CISSJun 24

    Ownership stake disclosure by Imperial Petroleum Inc./Marshall Islands (amended)

    Imperial Petroleum Inc./Marshall Islands, filed by

31. ROUTINE6-KC3is Inc.CISSJun 22

    Foreign issuer report

32. ROUTINESCHEDULE 13GC3is Inc.CISSMay 18

    Ownership stake disclosure by TOWERVIEW LLC

    TOWERVIEW LLC, filed by

33. ROUTINE424B3C3is Inc.CISSMay 18

    4 structured-note prospectuses

    Securities offering

    Show all 4

    • 424B3Securities offeringMay 18
    • 424B3Securities offeringMay 18
    • 424B3Securities offeringMay 18
    • 424B3Securities offeringMay 18

Older filings on EDGAR