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C3is Inc. — 424B5 Filings

2 424B5 filings on record

This page lists all 424B5 filings submitted to the SEC by C3is Inc. (CISS), sorted by most recent first. Each row links to the full filing on EdgarLookup. C3is Inc. has filed 2 424B5 documents with the SEC since 2022. To view all SEC filings by C3is Inc., see the full filings list.

Overview All Filings Financials Insiders
All 20-F 3 424B1 424B3 424B4 424B5 6-K 8-A12B CERT CORRESP DRS DRS/A DRSLTR EFFECT F-1 F-1/A F-1MEF F-3 POS AM S-8 SC 13D SC 13D/A SC 13G SCHEDULE 13D/A SCHEDULE 13G SCHEDULE 13G/A UPLOAD
Form Description Accession Number Filed Period
424B5 424B5 0001193125-26-071752 Feb 25, 2026 —
424B5 424B5 0001193125-25-235139 Oct 9, 2025 —