{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-004112","form_type":"8-K","ticker":"MKTX","cik":"0001278021","company_name":"MARKETAXESS HOLDINGS INC","filed_at":"2023-01-09T23:59:59+00:00","discovered_at":"2026-05-14T18:03:44.201458+00:00","generated_at":"2026-06-20T17:34:14.997608+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"MarketAxess promotes Chris Concannon to CEO; McVey becomes Executive Chairman effective April 3, 2023","bullets":["Effective April 3, 2023, Chris Concannon (previously President/COO) becomes CEO; Richard McVey becomes Executive Chairman.","Concannon's new CEO employment agreement provides $650K base salary, annual cash bonus, and equity (RSU $1.05M, PSU $2.45M).","McVey's Executive Chairman agreement provides $650K base salary, annual cash bonus, and 24-month severance upon certain terminations.","Concannon has over 20 years of electronic markets experience, including as CEO of Bats and COO of Cboe."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-004112","json":"https://secwatch.observer/filing/0001193125-23-004112.json","markdown":"https://secwatch.observer/filing/0001193125-23-004112.md","text":"https://secwatch.observer/filing/0001193125-23-004112.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1278021/000119312523004112/0001193125-23-004112-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1278021/000119312523004112/d408729d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-20T17:34:14.997608+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":"3d965cd4e2","claim":"Christopher R. Concannon changed role as Chief Executive Officer at MARKETAXESS HOLDINGS INC.","evidence_excerpt":"Mr. Christopher R. Concannon, currently President and Chief Operating Officer, will be promoted to Chief Executive Officer of the Company","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1278021/000119312523004112/0001193125-23-004112-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"will be promoted to"},{"label":"Role","value":"Chief Executive Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}