{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-013383","form_type":"8-K","ticker":"MKTX","cik":"0001278021","company_name":"MARKETAXESS HOLDINGS INC","filed_at":"2025-01-27T23:59:59+00:00","discovered_at":"2026-05-14T18:03:03.173589+00:00","generated_at":"2026-05-27T09:04:18.755595+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"MarketAxess Elects Roberto Hoornweg to Board of Directors","bullets":["Elected Roberto Hoornweg to Board of Directors, effective March 1, 2025.","Hoornweg will serve on the Board's Risk Committee and Finance Committee.","He brings extensive global fixed-income experience from Standard Chartered, Morgan Stanley, and others.","Hoornweg was most recently Co-Head of Corporate & Investment Banking at Standard Chartered."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-013383","json":"https://secwatch.observer/filing/0001193125-25-013383.json","markdown":"https://secwatch.observer/filing/0001193125-25-013383.md","text":"https://secwatch.observer/filing/0001193125-25-013383.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1278021/000119312525013383/0001193125-25-013383-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1278021/000119312525013383/d845956d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud","generated_at":"2026-05-27T09:04:18.755595+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":"7d6d6ccdd7","claim":"Roberto Hoornweg was elected as Director at MARKETAXESS HOLDINGS INC.","evidence_excerpt":"On January 23, 2025, the Board of Directors (the “ Board ”) of MarketAxess Holdings Inc. (the “ Company ”) elected Roberto Hoornweg to serve on the Company’s Board of Directors, effective March 1, 2025.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1278021/000119312525013383/0001193125-25-013383-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"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"}