{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-407834","form_type":"8-K","ticker":"MKTX","cik":"0001278021","company_name":"MARKETAXESS HOLDINGS INC","filed_at":"2026-09-29T21:24:53+00:00","discovered_at":"2026-09-29T21:26:00.282991+00:00","generated_at":"2026-10-12T13:54:15.919650+00:00","sec_items":["8.01"],"event_type":"regulatory","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"MarketAxess, ICE refile HSR notifications; merger waiting period now runs to Oct 29, 2026","bullets":["MarketAxess and ICE voluntarily withdrew their HSR premerger notification and report forms on Sept 25, 2026, then refiled on Sept 29, 2026 to give the DOJ additional review time.","The HSR waiting period now expires at 11:59 p.m. ET on Oct 29, 2026, unless earlier terminated or extended, including by a request for additional information.","MarketAxess still expects the merger with ICE to close in the first half of 2027, subject to HSR clearance, stockholder approval and other closing conditions.","A special meeting of MarketAxess stockholders is scheduled for Oct 29, 2026 to vote on adopting the merger agreement."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-407834","json":"https://secwatch.observer/filing/0001193125-26-407834.json","markdown":"https://secwatch.observer/filing/0001193125-26-407834.md","text":"https://secwatch.observer/filing/0001193125-26-407834.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1278021/000119312526407834/0001193125-26-407834-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1278021/000119312526407834/d142535d8k.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-12T13:54:15.919650+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}