C3is (CISS) SEC Filings & 10K Form $3.62 -0.01 (-0.14%) As of 11:09 AM Eastern This is a fair market value 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/A05/28/20243:37 PMC3is (Filer)Form 424B305/28/20243:39 PMC3is (Filer)Form 424B3Musk’s Project Colossus could mint millionaires (Ad)I predict this single breakthrough could make Elon the world’s first trillionaire — and mint more new millionaires than any tech advance in history. And for a limited time, you have the chance to claim a stake in this project, even though it’s housed inside Elon’s private company, xAI.All the details are waiting for you now — but you need to act before the May 1st funding window clos(Data available from 1/1/2016 forward) Related Companies and Tools Related Companies PSI Group 10K Form Lakeside 10K Form MingZhu Logistics 10K Form OceanPal 10K Form Jet.AI 10K Form Singularity Future Technology 10K Form SQZ Biotechnologies 10K Form USD Partners 10K Form Mondee 10K Form Air T 10K Form SEC Filings Tools Latest SEC FilingsInsider Trading Activity This page (NASDAQ:CISS) was last updated on 5/23/2025 by MarketBeat.com Staff From Our PartnersMarket Panic: Trump Just Dropped a Bomb on Your Stockstock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tarif...American Alternative | SponsoredWhite House to reset Social Security?Elon Musk's parting DOGE gift looks set to shock America... 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And it's one the Big Banks are alread...Premier Gold Co | SponsoredHere’s How to Claim Your Stake in Elon’s Private Company, xAIEven though xAI is a private company, tech legend and angel investor Jeff Brown found a way for everyday folks...Brownstone Research | Sponsored Adding Choose a watchlist: Watchlist Adding You have already added five stocks to your watchlist. Upgrade to MarketBeat All Access to add more stocks to your watchlist. Adding C3is Inc. Please log in to your account or sign up in order to add this asset to your watchlist. Share C3is With A Colleague Link copied to clipboard. Get 30 Days of MarketBeat All Access for Free Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools. Start Your 30-Day Trial MarketBeat All Access Features Best-in-Class Portfolio Monitoring Get personalized stock ideas. Compare portfolio to indices. Check stock news, ratings, SEC filings, and more. 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