{"filing":{"accession_number":"0001193125-26-407834","cik":"0001278021","ticker":"MKTX","company_name":"MARKETAXESS HOLDINGS INC","form":"8-K","filing_date":"2026-09-29","report_date":"2026-09-25","primary_document":"d142535d8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1278021/000119312526407834/d142535d8k.htm"},"events":[{"id":35848,"run_id":33037,"accession_number":"0001193125-26-407834","anchor_item_number":"8.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"summary":"The disclosure reports a material update on the proposed merger between MarketAxess and Intercontinental Exchange, Inc. Specifically, the parties voluntarily withdrew and refiled their Hart-Scott-Rodino premerger notifications on September 25 and September 29, 2026, respectively, extending the HSR Act waiting period to October 29, 2026. The filing confirms the merger remains subject to regulatory approval and stockholder vote, with completion expected in the first half of 2027. This is a substantive update to an ongoing material acquisition transaction.","company_name":"MARKETAXESS HOLDINGS INC","ticker":"MKTX","filing_date":"2026-09-29","form":"8-K","submitted_at":null,"items":[{"id":40054,"accession_number":"0001193125-26-407834","item_number":"8.01","item_title":"Other Events.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"The disclosure reports a material update on the proposed merger between MarketAxess and Intercontinental Exchange, Inc. Specifically, the parties voluntarily withdrew and refiled their Hart-Scott-Rodino premerger notifications on September 25 and September 29, 2026, respectively, extending the HSR Act waiting period to October 29, 2026. The filing confirms the merger remains subject to regulatory approval and stockholder vote, with completion expected in the first half of 2027. This is a substantive update to an ongoing material acquisition transaction.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-29T21:25:50.104916+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":40054,"accession_number":"0001193125-26-407834","item_number":"8.01","item_title":"Other Events.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"The disclosure reports a material update on the proposed merger between MarketAxess and Intercontinental Exchange, Inc. Specifically, the parties voluntarily withdrew and refiled their Hart-Scott-Rodino premerger notifications on September 25 and September 29, 2026, respectively, extending the HSR Act waiting period to October 29, 2026. The filing confirms the merger remains subject to regulatory approval and stockholder vote, with completion expected in the first half of 2027. This is a substantive update to an ongoing material acquisition transaction.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-29T21:25:50.104916+00:00","company_name":"MARKETAXESS HOLDINGS INC","ticker":"MKTX","filing_date":"2026-09-29"}]}