| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| STAHL MURRAY | Director | 470 PARK AVE S, 8TH FLOOR SOUTH, NEW YORK | /s/ Jay Kesslen, attorney-in-fact | 2025-08-13 | 0001207097 |
| HORIZON KINETICS ASSET MANAGEMENT LLC | 10%+ Owner | 470 PARK AVE S, 8TH FLOOR SOUTH, NEW YORK | /s/ Jay Kesslen, attorney-in-fact | 2025-08-13 | 0001056823 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | MIAX | Common Stock | 4.2M | Aug 13, 2025 | Horizon Kinetics Asset Management LLC | F1, F2 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | MIAX | OPTIONS | Aug 13, 2025 | Miami International Holdings Inc | 2.5K | $16.14 | Direct | F3 | ||||||
| holding | MIAX | OPTIONS | Aug 13, 2025 | Miami International Holdings Inc | 7.5K | $16.14 | Direct | F3 | ||||||
| holding | MIAX | OPTIONS | Aug 13, 2025 | Miami International Holdings Inc | 10K | $25.98 | Direct | F3 | ||||||
| holding | MIAX | OPTIONS | Aug 13, 2025 | Miami International Holdings Inc | 14.3K | $19.84 | Direct | F3 | ||||||
| holding | MIAX | Warrants | Aug 13, 2025 | Miami International Holdings Inc | 24.9K | $20.50 | Horizon Kinetics Asset Management LLC | F1, F4 | ||||||
| holding | MIAX | Warrants | Aug 13, 2025 | Miami International Holdings Inc | 27.6K | $20.50 | Horizon Kinetics Asset Management LLC | F1, F4 | ||||||
| holding | MIAX | Warrants | Aug 13, 2025 | Miami International Holdings Inc | 21.3K | $15.00 | Horizon Kinetics Asset Management LLC | F1, F4 | ||||||
| holding | MIAX | Warrants | Aug 13, 2025 | Miami International Holdings Inc | 38.9K | $20.50 | Horizon Kinetics Asset Management LLC | F1, F4 |
| Id | Content |
|---|---|
| F1 | Murray Stahl serves as Chairman, Chief Executive Officer, and Chief Investment Officer of Horizon Kinetics Asset Management LLC ("HKAM"), which manages funds and accounts (the "Managed Accounts") that hold securities of the Issuer. Mr. Stahl does not exercise investment discretion with respect to the securities of the Issuer that are beneficially owned by the Managed Accounts. Mr. Stahl disclaims beneficial ownership over the securities reported, except to the extent of his pecuniary interest therein, if any. The filing of this Form shall not be deemed an admission that the Mr. Stahl is the beneficial owner of such securities for purposes of Section 16 or any other purpose. |
| F2 | Of the 4,196,752 shares owned; 5,000 shares are Series B, and 15,000 shares are Restricted and Exercised Non-Voting. The shares of Series B Preferred Stock are convertible on a one-for-one basis into shares of common stock commencing on the Company's initial public offering of its common stock ("IPO") effective date, which is August 13, 2025. The Series B Preferred Stock has no expiration date. The Restricted and Exercised Non-Voting shares are convertible on a one-for-one basis into shares of common stock commencing at any time. The Non-Voting common stock has no expiration date |
| F3 | The options given to Mr. Stahl are fully vested. The options were granted initially as the right to buy nonvoting common stock. On the closing date of the Company's IPO of its common stock, these will convert to the right to buy common stock instead of nonvoting common stock. |
| F4 | The warrants are currently vested and presently exercisable until the expiration date shown. |