{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-25-040532","form_type":"8-K","ticker":"MIAX","cik":"0001438472","company_name":"MIAMI INTERNATIONAL HOLDINGS, INC.","filed_at":"2025-08-15T23:59:59+00:00","discovered_at":"2026-05-14T18:02:43.998073+00:00","generated_at":"2026-05-17T12:23:02.139615+00:00","sec_items":["3.02","8.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.9,"calibrated_materiality_score":0.9,"confidence":"high","headline":"Miami International Holdings completes IPO of 17.25M shares at $23, gross proceeds $396.8M","bullets":["IPO closed August 15, 2025, with 17,250,000 shares sold at $23.00 per share, including full underwriter over-allotment of 2,250,000 shares.","Gross proceeds to company of $396.8 million before underwriting discounts and expenses.","All outstanding Series B preferred and nonvoting common converted into 4,525,000 common shares immediately prior to IPO closing."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-25-040532","json":"https://secwatch.observer/filing/0001628280-25-040532.json","markdown":"https://secwatch.observer/filing/0001628280-25-040532.md","text":"https://secwatch.observer/filing/0001628280-25-040532.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1438472/000162828025040532/0001628280-25-040532-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1438472/000162828025040532/miamiinternationalholdings.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T12:23:02.139615+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"}