Cyclerion Therapeutics (CYCN) SEC Filings & 10K Form $2.82 +0.11 (+4.06%) Closing price 02/21/2025 04:00 PM EasternExtended Trading$2.87 +0.05 (+1.77%) As of 02/21/2025 06:11 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 AnalysisChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrends Recent Cyclerion Therapeutics 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 TypeView02/12/202511:15 PMCyclerion Therapeutics (Filer)Form EFFECT02/12/20252:36 PMCyclerion Therapeutics (Subject)MFN Partners Management, LP (Filed by)Form SCHEDULE 13G/A02/12/202512:25 PMAmerican Endowment Foundation (Filed by)Cyclerion Therapeutics (Subject)Form SCHEDULE 13G/A02/12/20258:28 AMCyclerion Therapeutics (Subject)FMR LLC (Filed by)Form SCHEDULE 13G/A02/04/20253:40 PMCyclerion Therapeutics (Filer)Form S-3Registration statement under Securities Act of 1933 12/17/20247:16 AMCyclerion Therapeutics (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 11/25/20243:05 PMCyclerion Therapeutics (Issuer)Greenspan David Gerald (Reporting)Slate Path Capital LP (Reporting)Form 4Statement of changes in beneficial ownership of securities 08/07/20246:14 AMCyclerion Therapeutics (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 08/07/20245:45 AMCyclerion Therapeutics (Filer)Form 10-QGeneral form for quarterly reports under Section 13 or 15(d) 07/12/20245:17 PMArtal International S.C.A. (Filed by)Cyclerion Therapeutics (Subject)Form SC 13G/A04/29/20243:18 PMCyclerion Therapeutics (Filer)Form DEF 14A04/29/20243:21 PMCyclerion Therapeutics (Filer)Form DEFA14A(Data available from 1/1/2016 forward) Related Companies and Tools Related Companies Barinthus Biotherapeutics SEC Filings Alterity Therapeutics SEC Filings RAPT Therapeutics SEC Filings MiNK Therapeutics SEC Filings Q32 Bio SEC Filings Estrella Immunopharma SEC Filings Annovis Bio SEC Filings Tempest Therapeutics SEC Filings CASI Pharmaceuticals SEC Filings Iterum Therapeutics SEC Filings SEC Filings Tools Latest SEC FilingsInsider Trading Activity This page (NASDAQ:CYCN) was last updated on 2/22/2025 by MarketBeat.com Staff From Our PartnersElon’s “New Gold”MIT scientists just developed a brand-new metal… A metal that’s shaping up to be, not only the biggest brea...True Market Insiders | Sponsored$2 Trillion Disappears Because of Fed's Secretive New Move$2 trillion has disappeared from the US government's books. 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