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C3is Inc. — 424B4 Filings

4 424B4 filings on record

This page lists all 424B4 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 4 424B4 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
424B4 424B4 0001193125-25-316168 Dec 11, 2025 —
424B4 424B4 0001193125-24-068660 Mar 15, 2024 —
424B4 424B4 0001193125-24-012266 Jan 22, 2024 —
424B4 424B4 0001193125-23-180972 Jul 3, 2023 —