{"schema_version":"secwatch.filing_event.v1","accession":"0001140361-21-028904","form_type":"8-K","ticker":"CYCN","cik":"0001755237","company_name":"Cyclerion Therapeutics, Inc.","filed_at":"2021-08-19T23:59:59+00:00","discovered_at":"2026-05-14T18:04:19.501703+00:00","generated_at":"2026-06-29T08:58:31.490178+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Director Kevin B. Churchwell resigns from Cyclerion board effective Aug 18, 2021","bullets":["Kevin B. Churchwell, M.D. resigned from the board of directors on August 18, 2021.","No disagreement with company operations, policies, or practices cited.","Resignation due to expanded responsibilities as CEO of Boston Children's Hospital.","Marsha Fanucci, Board Chair, thanked Churchwell for his service."],"urls":{"canonical":"https://secwatch.observer/filing/0001140361-21-028904","json":"https://secwatch.observer/filing/0001140361-21-028904.json","markdown":"https://secwatch.observer/filing/0001140361-21-028904.md","text":"https://secwatch.observer/filing/0001140361-21-028904.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1755237/000114036121028904/0001140361-21-028904-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1755237/000114036121028904/brhc10028200_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T08:58:31.490178+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"512f6e033d","claim":"Kevin B. Churchwell, M.D. resigned as Director at Cyclerion Therapeutics, Inc..","evidence_excerpt":"On and effective August 18, 2021, Kevin B. Churchwell, M.D., resigned from the board of directors of Cyclerion Therapeutics, Inc.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1755237/000114036121028904/0001140361-21-028904-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}