C3is (CISS) SEC Filings & 10K Form $2.16 -0.07 (-3.14%) Closing price 03:59 PM EasternExtended Trading$2.21 +0.05 (+2.31%) As of 04:30 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share SEC Filings Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Recent C3is SEC Filings All Filing Types 1 10 10-D 10-K 10-M 10-Q 11-K 12b-25 13F 13H 144 15 15F 17-H 18 18-K 19b-4(e) 19b-4 19b-7 1-A 1-E 1-K 1-N 1-SA 1-U 1-Z 20-F 24F-2 25 2-E 3 4 40-F 5 6-K 7-M 8-A 8-K 8-M 9-M ABS DD-15E ABS-15G ABS-EE ADV ADV-E ADV-H ADV-NR ADV-W ATS ATS-R BD BD-N BDW C CA-1 CB CFPORTAL D F-1 F-10 F-3 F-4 F-6 F-7 F-8 F-80 F-N F-X ID MA MA-I MA-NR MA-W MSD MSDW n/a N-14 N-17D-1 N-17f-1 N-17f-2 N-18f-1 N-1A N-2 N-23c-3 N-27D-1 N-3 N-4 N-5 N-54A N-54C N-6 N-6EI-1 N-6F N-8A N-8B-2 N-8B-4 N-8F N-CR N-CSR N-MFP N-PX N-Q NRSRO N-SAR PF PILOT R31 S-1 S-11 S-20 S-3 S-4 S-6 S-8 SBSE SBSE-A SBSE-BD SBSE-C SBSE-W SCI SD SDR SE SF-1 SF-3 SIP T-1 T-2 T-3 T-4 T-6 TA-1 TA-2 TA-W TCR TH WB-APP X-17A-19 X-17A-5 Part I X-17A-5 Part II X-17A-5 Part IIA X-17A-5 Part IIB X-17A-5 Part III X-17A-5 Schedule I X-17F-1A Filing Types Include Ownership Filings Exclude Ownership Filings Only Show Ownership FIlings Ownership Filings Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame Start Date End Date Export to Excel DateFilerForm TypeView10/10/20254:00 PMC3is (Subject)Flawless Management Inc. (Filed by)Form SCHEDULE 13D/A10/10/20254:00 PMC3is (Subject)Imperial Petroleum Inc./Marshall Islands (Filed by)Imperial Petroleum Inc./Marshall Islands (Filed by)Form SCHEDULE 13D/A10/09/20256:36 AMC3is (Filer)Form 424B510/09/20256:38 AMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 10/02/20258:06 AMC3is (Subject)Pandora Consultants II SA (Filed by)Form SCHEDULE 13G/A10/01/20253:04 PMC3is (Filer)Form POS AM10/01/20253:06 PMC3is (Filer)Form POS AM10/01/20253:08 PMC3is (Filer)Form POS AM09/29/20254:02 PMC3is (Subject)WEXFORD CAPITAL LP (Filed by)Form SCHEDULE 13G/A09/29/20257:00 AMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 09/24/20255:44 PMC3is (Subject)WEXFORD CAPITAL LP (Filed by)Form SCHEDULE 13G Get the Latest News and Ratings for CISS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for C3is and its competitors with MarketBeat's FREE daily newsletter. 09/02/20253:07 PMC3is (Filer)Form 424B308/29/20255:05 AMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 06/25/20253:34 PMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 05/05/202511:15 PMC3is (Filer)Form EFFECT05/05/202511:15 PMC3is (Filer)Form EFFECT05/05/202511:15 PMC3is (Filer)Form EFFECT04/15/20257:00 PMC3is (Subject)Imperial Petroleum Inc./Marshall Islands (Filed by)Imperial Petroleum Inc./Marshall Islands (Filed by)Form SCHEDULE 13D/A04/04/20253:10 PMC3is (Filer)Form 424B304/04/20253:11 PMC3is (Filer)Form 424B304/04/20253:12 PMC3is (Filer)Form 424B304/02/20258:16 AMC3is (Filer)Form 424B304/02/20258:18 AMC3is (Filer)Form 424B304/02/20258:21 AMC3is (Filer)Form 424B304/02/20258:14 AMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 03/12/20258:05 AMC3is (Filer)Form 424B303/12/20258:01 AMC3is (Filer)Form 424B303/12/20257:55 AMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 03/12/20257:58 AMC3is (Filer)Form 424B303/06/202511:15 PMC3is (Filer)Form EFFECT02/21/20253:41 PMC3is (Filer)Form F-3Registration statement for securities of certain foreign private issuers 02/21/20253:17 PMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 02/18/20257:00 AMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 01/14/20256:00 PMC3is (Subject)Imperial Petroleum Inc./Marshall Islands (Filed by)Imperial Petroleum Inc./Marshall Islands (Filed by)Form SCHEDULE 13D/A01/02/20253:11 PMC3is (Filer)Form 424B301/02/20253:13 PMC3is (Filer)Form 424B301/02/20253:14 PMC3is (Filer)Form 424B301/02/20253:06 PMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 12/15/202411:15 PMC3is (Filer)Form EFFECT12/15/202411:15 PMC3is (Filer)Form EFFECT12/15/202411:15 PMC3is (Filer)Form EFFECT12/10/20243:11 PMC3is (Filer)Form POS AM12/10/20243:13 PMC3is (Filer)Form POS AM12/10/20243:16 PMC3is (Filer)Form POS AM11/19/20243:46 PMC3is (Filer)Form 424B3(Data available from 1/1/2016 forward) Related Companies and Tools Related Companies Singularity Future Technology 10K Form Yellow 10K Form Yellow 10K Form SQZ Biotechnologies 10K Form Globavend 10K Form USD Partners 10K Form Air T 10K Form EuroDry 10K Form Imperial Petroleum 10K Form Pyxis Tankers 10K Form SEC Filings Tools Latest SEC FilingsInsider Trading Activity This page (NASDAQ:CISS) was last updated on 10/13/2025 by MarketBeat.com Staff From Our PartnersURGENT: The Market's 3 Red Flags Are FlashingHere’s the uncomfortable truth: The smartest investors in the world are already preparing for a crash befor...StockEarnings | SponsoredBitcoin grabs headlines, but smart money likes this tokenBitcoin grabs headlines, but smart money likes this token My research team has identified the token positio...Crypto 101 Media | SponsoredYour Bank Account Is No Longer SafeWhat If Washington Declared That: YOUR Money ISN'T Actually Yours? 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