0002080477-26-000014.txt : 20260806 0002080477-26-000014.hdr.sgml : 20260806 20260806160547 ACCESSION NUMBER: 0002080477-26-000014 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260804 FILED AS OF DATE: 20260806 DATE AS OF CHANGE: 20260806 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Gallagher Thomas P. CENTRAL INDEX KEY: 0002080477 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-42805 FILM NUMBER: 261248872 MAIL ADDRESS: STREET 1: 7 ROSZEL RD, SUITE 1-A CITY: PRINCETON STATE: NJ ZIP: 08540 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MIAMI INTERNATIONAL HOLDINGS, INC. CENTRAL INDEX KEY: 0001438472 STANDARD INDUSTRIAL CLASSIFICATION: SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211] ORGANIZATION NAME: 09 Crypto Assets EIN: 261482385 STATE OF INCORPORATION: DE BUSINESS ADDRESS: STREET 1: 7 ROSZEL ROAD STREET 2: FIFTH FLOOR, SUITE 1-A CITY: PRINCETON STATE: NJ ZIP: 08540 BUSINESS PHONE: 609-897-7300 MAIL ADDRESS: STREET 1: 7 ROSZEL ROAD STREET 2: FIFTH FLOOR, SUITE 1-A CITY: PRINCETON STATE: NJ ZIP: 08540 FORMER COMPANY: FORMER CONFORMED NAME: MIAMI INTERNATIONAL HOLDINGS INC DATE OF NAME CHANGE: 20080624 4 1 wk-form4_1786046744.xml FORM 4 X0609 4 2026-08-04 0 0001438472 MIAMI INTERNATIONAL HOLDINGS, INC. MIAX 0002080477 Gallagher Thomas P. false C/O MIAMI INTERNATIONAL HOLDINGS, INC 7 ROSZEL ROAD, SUITE 1A PRINCETON NJ 08540 1 1 0 0 Chairman & CEO 1 Common Stock 2026-08-04 4 M 0 48334 12 A 1771609 I By Gallagher Investments, LLC Common Stock 2026-08-04 4 S 0 48334 45.69 D 1723275 I By Gallagher Investments, LLC Nonqualified Stock Option (Right to Buy) 12 2026-08-04 4 M 0 48334 0 D 2028-05-28 Common Stock 48334 235000 I By Gallagher Investments, LLC This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 29, 2025. Mr. Gallagher maintains beneficial ownership, including dispositive and voting control, over Gallagher Investments, LLC. This transaction was executed in multiple trades throughout the day at prices ranging from $45.09 to $46.78. 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. The options are fully vested. /s/Alessandra Maria Corona Henriques, Attorney-in-Fact 2026-08-06