{"filing":{"accession_number":"0001193125-26-365150","cik":"0001755237","ticker":"CYCN","company_name":"Cyclerion Therapeutics, Inc.","form":"8-K","filing_date":"2026-08-25","report_date":"2026-08-25","primary_document":"d376250d8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1755237/000119312526365150/d376250d8k.htm"},"events":[{"id":29486,"run_id":27001,"accession_number":"0001193125-26-365150","anchor_item_number":"8.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"summary":"The filing discloses a material acquisition activity: Cyclerion's planned merger with Korsana Biosciences, Inc., with the board fixing the record date (September 4, 2026) for distribution of contingent value rights (CVRs) to shareholders in connection with the merger. This is a change-of-control transaction that would materially affect the registrant and its shareholders, making it a core M\u0026A disclosure despite being filed under Item 8.01 rather than Item 1.01.","company_name":"Cyclerion Therapeutics, Inc.","ticker":"CYCN","filing_date":"2026-08-25","form":"8-K","submitted_at":null,"items":[{"id":31783,"accession_number":"0001193125-26-365150","item_number":"8.01","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"The filing discloses a material acquisition activity: Cyclerion's planned merger with Korsana Biosciences, Inc., with the board fixing the record date (September 4, 2026) for distribution of contingent value rights (CVRs) to shareholders in connection with the merger. This is a change-of-control transaction that would materially affect the registrant and its shareholders, making it a core M\u0026A disclosure despite being filed under Item 8.01 rather than Item 1.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-25T20:16:50.921734+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":31783,"accession_number":"0001193125-26-365150","item_number":"8.01","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"The filing discloses a material acquisition activity: Cyclerion's planned merger with Korsana Biosciences, Inc., with the board fixing the record date (September 4, 2026) for distribution of contingent value rights (CVRs) to shareholders in connection with the merger. This is a change-of-control transaction that would materially affect the registrant and its shareholders, making it a core M\u0026A disclosure despite being filed under Item 8.01 rather than Item 1.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-25T20:16:50.921734+00:00","company_name":"Cyclerion Therapeutics, Inc.","ticker":"CYCN","filing_date":"2026-08-25"}]}