{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-22-019124","form_type":"8-K","ticker":"CYCN","cik":"0001755237","company_name":"Cyclerion Therapeutics, Inc.","filed_at":"2022-09-30T23:59:59+00:00","discovered_at":"2026-05-14T18:03:56.918311+00:00","generated_at":"2026-06-23T06:26:18.061860+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"negative","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"CSO Andreas Busch resigns effective Sept 30, 2022","bullets":["Andreas Busch, Ph.D. resigned as Chief Scientific Officer, effective Sept 30, 2022.","Dr. Busch left to pursue another opportunity; no disagreement with Company's operations, policies or practices.","No successor has been named; search process not disclosed."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-22-019124","json":"https://secwatch.observer/filing/0000950170-22-019124.json","markdown":"https://secwatch.observer/filing/0000950170-22-019124.md","text":"https://secwatch.observer/filing/0000950170-22-019124.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1755237/000095017022019124/0000950170-22-019124-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1755237/000095017022019124/cycn-20220930.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-23T06:26:18.061860+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":"6d20155e31","claim":"Andreas Busch, Ph.D. resigned as Chief Scientific Officer at Cyclerion Therapeutics, Inc..","evidence_excerpt":"On and effective September 30, 2022, Andreas Busch, Ph.D. resigned from his position as Chief Scientific Officer of Cyclerion Therapeutics, Inc. (the “Company”) to pursue another opportunity.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1755237/000095017022019124/0000950170-22-019124-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chief Scientific Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}