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The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":119601,"source":{"system":"sec-edgar","filing":"0002080671-26-000016","document":"wk-form4_1788553678.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2080671/000208067126000016/wk-form4_1788553678.xml","form_type":"4"}},{"id":4544,"issuer":{"id":4026,"kind":"organization","name":"MIAMI INTERNATIONAL HOLDINGS, INC.","symbol":"MIAX"},"owners":[{"id":10102,"kind":"person","name":"Deitzel Edward","position":1,"cik":"0002080671","reported_name":"Deitzel Edward","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CRO, CCO MIAX Exchanges"}}],"security":"Common Stock","published_at":"2026-09-04T20:28:01.000Z","date":"2026-09-03","kind":"exercise","planned":true,"acquired":true,"shares":11000,"price":12,"value":132000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 30, 2025."}],"balance_after":130601,"source":{"system":"sec-edgar","filing":"0002080671-26-000016","document":"wk-form4_1788553678.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2080671/000208067126000016/wk-form4_1788553678.xml","form_type":"4"}},{"id":694421,"issuer":{"id":4026,"kind":"organization","name":"MIAMI INTERNATIONAL HOLDINGS, INC.","symbol":"MIAX"},"owners":[{"id":10102,"kind":"person","name":"Deitzel Edward","position":1,"cik":"0002080671","reported_name":"Deitzel Edward","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CRO, CCO MIAX Exchanges"}}],"security":"Nonqualified Stock Option (Right to Buy)","published_at":"2026-08-06T20:08:39.000Z","date":"2026-08-04","kind":"exercise","planned":true,"acquired":false,"shares":11000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 30, 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options are fully vested."}],"balance_after":77000,"derivative":{"exercise_price":12,"expiration_date":"2029-07-31","underlying":"Common Stock","underlying_shares":11000},"source":{"system":"sec-edgar","filing":"0002080671-26-000014","document":"wk-form4_1786046917.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2080671/000208067126000014/wk-form4_1786046917.xml","form_type":"4"}},{"id":694420,"issuer":{"id":4026,"kind":"organization","name":"MIAMI INTERNATIONAL HOLDINGS, INC.","symbol":"MIAX"},"owners":[{"id":10102,"kind":"person","name":"Deitzel Edward","position":1,"cik":"0002080671","reported_name":"Deitzel Edward","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CRO, CCO MIAX Exchanges"}}],"security":"Common Stock","published_at":"2026-08-06T20:08:39.000Z","date":"2026-08-04","kind":"sale","planned":true,"acquired":false,"shares":11000,"price":45.78,"value":503580.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades throughout the day at prices ranging from $45.11 to $46.57. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":119601,"source":{"system":"sec-edgar","filing":"0002080671-26-000014","document":"wk-form4_1786046917.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2080671/000208067126000014/wk-form4_1786046917.xml","form_type":"4"}},{"id":694419,"issuer":{"id":4026,"kind":"organization","name":"MIAMI INTERNATIONAL HOLDINGS, INC.","symbol":"MIAX"},"owners":[{"id":10102,"kind":"person","name":"Deitzel Edward","position":1,"cik":"0002080671","reported_name":"Deitzel Edward","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CRO, CCO MIAX Exchanges"}}],"security":"Common 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