{"schema_version":"secwatch.filing_event.v1","accession":"0001438472-25-000016","form_type":"8-K","ticker":"MIAX","cik":"0001438472","company_name":"MIAMI INTERNATIONAL HOLDINGS, INC.","filed_at":"2025-11-26T23:59:59+00:00","discovered_at":"2026-05-14T18:02:39.418263+00:00","generated_at":"2026-05-16T16:26:53.459202+00:00","sec_items":["8.01","9.01"],"event_type":"m_and_a","sentiment":"positive","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"MIAX sells 90% of MIAXdx to Robinhood & Susquehanna; retains 10% stake","bullets":["MIAX to sell 90% of MIAXdx to Robinhood Markets (NASDAQ:HOOD) in partnership with Susquehanna International Group.","MIAX will retain the remaining 10% equity interest in MIAXdx, a CFTC-regulated DCM and DCO.","Transaction expected to close in Q1 2026, subject to customary closing conditions and CFTC filings.","CEO Thomas Gallagher cites expedited access to prediction markets and strategic alignment with industry leaders.","No purchase price disclosed; MIAX's retained stake provides continued exposure to prediction markets."],"urls":{"canonical":"https://secwatch.observer/filing/0001438472-25-000016","json":"https://secwatch.observer/filing/0001438472-25-000016.json","markdown":"https://secwatch.observer/filing/0001438472-25-000016.md","text":"https://secwatch.observer/filing/0001438472-25-000016.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1438472/000143847225000016/0001438472-25-000016-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1438472/000143847225000016/miax-20251125.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T16:26:53.459202+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"}