{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-25-057039","form_type":"8-K","ticker":"MIAX","cik":"0001438472","company_name":"MIAMI INTERNATIONAL HOLDINGS, INC.","filed_at":"2025-12-15T23:59:59+00:00","discovered_at":"2026-05-14T18:02:39.418456+00:00","generated_at":"2026-05-16T13:12:18.794861+00:00","sec_items":["3.02","8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Miami International Holdings secondary offering of 6.75M shares by stockholders; 4M shares issued unregistered","bullets":["Existing stockholders sold 6,750,000 shares in secondary offering at $41.00 per share; company received no proceeds.","Underwriters fully exercised option to purchase an additional 1,012,500 shares at $41.00 each.","Company issued 4,006,946 shares of common stock through conversions of a $5,000,000 convertible note and warrant exercises since September 30, 2025.","Conversions included 317,787 shares from principal plus interest on the $5 million note at $16.00 per share.","Warrant exercises yielded $2,419,500 cash and surrender of 733,923 shares via cashless exercises."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-25-057039","json":"https://secwatch.observer/filing/0001628280-25-057039.json","markdown":"https://secwatch.observer/filing/0001628280-25-057039.md","text":"https://secwatch.observer/filing/0001628280-25-057039.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1438472/000162828025057039/0001628280-25-057039-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1438472/000162828025057039/miax-20251215.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud","generated_at":"2026-05-16T13:12:18.794861+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":"44816c1d2fa034391af412b295a075b60f621014","claim":"MIAMI INTERNATIONAL HOLDINGS, INC. issued 317,787 shares of common stock for Conversion of a convertible promissory note in the principal amount of $5,000,000, plus accrued but unpaid interest thereunder at a price per share of $16.00.","evidence_excerpt":"Common Stock 12/4/2025 317,787 Conversion of a convertible promissory note in the principal amount of $5,000,000, plus accrued but unpaid interest thereunder at a price per share of $16.00.","evidence_source":"SEC 8-K Item 3.02/3.03","evidence_url":"https://www.sec.gov/Archives/edgar/data/1438472/000162828025057039/0001628280-25-057039-index.htm","confidence":0.9,"family_label":"Equity Issuances","details":[{"label":"Security","value":"common stock"},{"label":"Shares","value":"317,787 shares"},{"label":"Consideration","value":"Conversion of a convertible promissory note in the principal amount of $5,000,000, plus accrued but unpaid interest thereunder at a price per share of $16.00"}],"fact_type":"equity_issuance"},{"claim_id":"8a9bb7514f1480c4a235c544eb33cfd0cf54fa93","claim":"MIAMI INTERNATIONAL HOLDINGS, INC. issued 3,522,102 shares of common stock to certain of the Company's holders for $2,419,500 plus surrender of an aggregate of 698,521 shares of Common Stock pursuant to cashless exercise of warrants.","evidence_excerpt":"Common Stock 12/12/2025 3,522,102 $2,419,500 plus surrender of an aggregate of 698,521 shares of Common Stock pursuant to cashless exercise of warrants","evidence_source":"SEC 8-K Item 3.02/3.03","evidence_url":"https://www.sec.gov/Archives/edgar/data/1438472/000162828025057039/0001628280-25-057039-index.htm","confidence":0.9,"family_label":"Equity Issuances","details":[{"label":"Security","value":"common stock"},{"label":"Shares","value":"3,522,102 shares"},{"label":"Purchaser","value":"certain of the Company's holders"},{"label":"Consideration","value":"$2,419,500 plus surrender of an aggregate of 698,521 shares of Common Stock pursuant to cashless exercise of warrants"}],"fact_type":"equity_issuance"},{"claim_id":"c29a1ec6bb4d48a3e097a987a71ee33428054e18","claim":"MIAMI INTERNATIONAL HOLDINGS, INC. issued 7,483 shares of common stock for Conversion of $119,726 worth of accrued but unpaid interest under a convertible promissory note at a price per share of $16.00.","evidence_excerpt":"Common Stock 10/1/2025 7,483 Conversion of $119,726 worth of accrued but unpaid interest under a convertible promissory note at a price per share of $16.00.","evidence_source":"SEC 8-K Item 3.02/3.03","evidence_url":"https://www.sec.gov/Archives/edgar/data/1438472/000162828025057039/0001628280-25-057039-index.htm","confidence":0.9,"family_label":"Equity Issuances","details":[{"label":"Security","value":"common stock"},{"label":"Shares","value":"7,483 shares"},{"label":"Consideration","value":"Conversion of $119,726 worth of accrued but unpaid interest under a convertible promissory note at a price per share of $16.00"}],"fact_type":"equity_issuance"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}