| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Schafer Douglas M. JR | EVP and CIO | C/O MIAMI INTERNATIONAL HOLDINGS, INC., 7 ROSZEL ROAD, SUITE 1A, PRINCETON | /s/ Barbara J. Comly, Attorney-in-fact | 12 Feb 2026 | 0002079445 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MIAX | Common Stock | Tax liability | $4,486,372 | -108,550 | -20% | $41.33 | 429,246 | 10 Feb 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Represents shares that have been surrendered to the Company to satisfy tax withholding and remittance obligations in connection with the net settlement of restricted stock awards and does not represent a sale by the reporting person. |