{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-23-048120","form_type":"8-K","ticker":"VIRT","cik":"0001592386","company_name":"Virtu Financial, Inc.","filed_at":"2023-04-21T23:59:59+00:00","discovered_at":"2026-05-14T18:03:39.570394+00:00","generated_at":"2026-06-16T21:21:10.405417+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Virtu Financial Chairman Robert Greifeld resigns; Michael T. Viola appointed successor","bullets":["Robert Greifeld resigned as Chairman and Board member effective April 19, 2023, to pursue investment management and philanthropy.","Michael T. Viola, board member since 2016, appointed Chairman; Board now has ten directors.","Greifeld's departure is not due to any disagreement with the Board or management.","Mr. Viola also serves as President of the Viola family private investment office and on other boards."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-23-048120","json":"https://secwatch.observer/filing/0001104659-23-048120.json","markdown":"https://secwatch.observer/filing/0001104659-23-048120.md","text":"https://secwatch.observer/filing/0001104659-23-048120.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1592386/000110465923048120/0001104659-23-048120-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1592386/000110465923048120/tm2313027d2_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T21:21:10.405417+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":"2452fbbfc2","claim":"Michael T. Viola was appointed as Chairman at Virtu Financial, Inc..","evidence_excerpt":"the Board appointed current director Mr. Michael T. Viola to serve as Chairman","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1592386/000110465923048120/0001104659-23-048120-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chairman"}],"fact_type":"executive_change"},{"claim_id":"9893c8afc9","claim":"Robert Greifeld resigned as Chairman at Virtu Financial, Inc..","evidence_excerpt":"On April 19, 2023, Robert Greifeld resigned as Chairman and member of the Board of Directors","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1592386/000110465923048120/0001104659-23-048120-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chairman"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}