144 0002080671 XXXXXXXX LIVE 0001438472 Miami International Holdings, Inc. 001-42805 7 Roszel Road, Suite 1A Princeton NJ 08540 6098977300 EDWARD DEITZEL Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

44000 2060520.00 94907086 08/04/2026 NYSE Common 08/04/2026 Exercise of Stock Options Issuer N 44000 08/04/2026 Cash N 10b5-1 Sales for EDWARD DEITZEL

7 Roszel Road, Suite 1A Princeton NJ 08540

Common 07/06/2026 11000 462442.91 10b5-1 Sales for EDWARD DEITZEL

7 Roszel Road, Suite 1A Princeton NJ 08540

Common 06/02/2026 11000 463766.99 The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale. 08/04/2026 12/30/2025 /s/ Edward Deitzel