C3is (CISS) SEC Filings & 10K Form $4.23 +0.63 (+17.50%) Closing price 04:00 PM EasternExtended Trading$3.98 -0.26 (-6.03%) As of 05:59 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 AnalysisChartCompetitorsEarningsHeadlinesOwnershipSEC 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 TypeView05/05/202511:15 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 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. 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 424B309/30/20248:06 AMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 09/30/20248:10 AMC3is (Filer)Form 424B309/30/20248:12 AMC3is (Filer)Form 424B309/30/20248:13 AMC3is (Filer)Form 424B309/18/20244:01 PMC3is (Subject)Flawless Management Inc. (Filed by)Form SC 13D/A08/30/20247:53 AMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 08/23/20243:30 PMC3is (Filer)Form 6-KReport of foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 06/24/20248:00 AMC3is (Subject)Flawless Management Inc. (Filed by)Form SC 13D/A(Data available from 1/1/2016 forward) Related Companies and Tools Related Companies Jet.AI 10K Form PSI Group 10K Form Lakeside 10K Form OceanPal 10K Form Singularity Future Technology 10K Form SQZ Biotechnologies 10K Form USD Partners 10K Form Mondee 10K Form Air T 10K Form Atlas 10K Form SEC Filings Tools Latest SEC FilingsInsider Trading Activity This page (NASDAQ:CISS) was last updated on 6/13/2025 by MarketBeat.com Staff From Our PartnersUtah’s New Oil FindThe Real Reason 218,000 Acres Just Vanished The government just quietly leased 218,000 acres in the middle ...Stansberry Research | SponsoredWhy July 22nd Could Mean Big Changes for Social SecurityIn a stunning move, President Trump has authorized an AI-led transformation of federal agencies, including Soc...Altimetry | SponsoredElon’s NEXT Big IPO?Cancel your internet TODAY!? 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