{"schema_version":"secwatch.filing_event.v1","accession":"0001438472-26-000017","form_type":"8-K","ticker":"MIAX","cik":"0001438472","company_name":"MIAMI INTERNATIONAL HOLDINGS, INC.","filed_at":"2026-02-25T23:59:59+00:00","discovered_at":"2026-05-14T18:02:35.089619+00:00","generated_at":"2026-05-16T00:13:28.733781+00:00","sec_items":["2.02","9.01"],"event_type":"earnings","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"MIAX Q4 net revenue $124.5M (+52% YoY), adjusted EBITDA $62.2M (+112%); sets FY2026 guidance","bullets":["Q4 GAAP diluted EPS $0.27; adjusted diluted EPS $0.52.","FY2025 net revenue $430.5M (+56% YoY); GAAP diluted EPS ($1.00), adjusted diluted EPS $1.82.","Options exchanges record average daily volume 11.1M contracts (+46.5% YoY); market share 18.2%.","Completed sale of 90% of MIAXdx to Robinhood/Susquehanna JV in Jan 2026; retained 10%.","FY2026 adjusted opex guidance $265M-275M; capex $40M-45M; D&A $33M-38M."],"urls":{"canonical":"https://secwatch.observer/filing/0001438472-26-000017","json":"https://secwatch.observer/filing/0001438472-26-000017.json","markdown":"https://secwatch.observer/filing/0001438472-26-000017.md","text":"https://secwatch.observer/filing/0001438472-26-000017.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1438472/000143847226000017/0001438472-26-000017-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1438472/000143847226000017/miax-20260225.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T00:13:28.733781+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"}