{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-140700","form_type":"8-K","ticker":"KRRO","cik":"0001703647","company_name":"Korro Bio, Inc.","filed_at":"2023-05-10T23:59:59+00:00","discovered_at":"2026-05-14T18:03:40.118880+00:00","generated_at":"2026-06-15T06:37:05.521921+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Director Joel S. Marcus resigns from Frequency Therapeutics board effective May 5, 2023","bullets":["Joel S. Marcus resigned from the Board of Directors and all committees on May 5, 2023.","Resignation was immediately effective as of that date.","Mr. Marcus confirmed his departure was not due to any disagreement with the company."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-140700","json":"https://secwatch.observer/filing/0001193125-23-140700.json","markdown":"https://secwatch.observer/filing/0001193125-23-140700.md","text":"https://secwatch.observer/filing/0001193125-23-140700.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1703647/000119312523140700/0001193125-23-140700-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1703647/000119312523140700/d471290d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-15T06:37:05.521921+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":"900c8600e8","claim":"Joel S. Marcus resigned as Director at Korro Bio, Inc..","evidence_excerpt":"On May 5, 2023, Joel S. Marcus notified Frequency Therapeutics, Inc. (the “Company”) of his resignation from the Company’s Board of Directors (the “Board”) and all committees of the Board on which he served, which was immediately effective.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1703647/000119312523140700/0001193125-23-140700-index.htm","confidence":0.95,"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"}