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C3is Inc. — SCHEDULE 13G/A Filings

6 SCHEDULE 13G/A filings on record

This page lists all SCHEDULE 13G/A 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 6 SCHEDULE 13G/A 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
SCHEDULE 13G/A 0001909404-26-000006 Jan 14, 2026
SCHEDULE 13G/A 0000898432-26-000030 Jan 13, 2026
SCHEDULE 13G/A 0001079973-25-001730 Nov 14, 2025
SCHEDULE 13G/A 0001193125-25-227569 Oct 2, 2025
SCHEDULE 13G/A 0001048462-25-000027 Sep 29, 2025
SCHEDULE 13G/A 0001079973-25-000255 Feb 14, 2025