SEC Form 4 · accession 0001437749-26-020945
MIAMI INTERNATIONAL HOLDINGS, INC. · MIAX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Eric Sites
Director
Period of report
Jun 15, 2026
Accepted (ET)
Jun 17, 2026 · 3:19 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001438472
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Jun 15, 2026 | A | 714 | $0.00 | A | 714 | D | |
| Common StockF2 | Jun 16, 2026 | A | 4,970 | $0.00 | A | 5,684 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nonqualified Stock Option (Right to Buy)F3 | $16.14 | holding | — | — | — | Aug 1, 2021 | Mar 26, 2030 | Miami International Holdings Inc | 7,500 | 0 | D |
| Nonqualified Stock Option (Right to Buy)F3 | $25.98 | holding | — | — | — | Jul 1, 2022 | Mar 26, 2030 | Miami International Holdings Inc | 7,500 | 0 | D |
| Nonqualified Stock Option (Right to Buy)F3 | $19.84 | holding | — | — | — | Mar 27, 2023 | Mar 26, 2030 | Miami International Holdings Inc | 9,554 | 0 | D |
| Nonqualified Stock Option (Right to Buy)F3 | $20.00 | holding | — | — | — | Apr 1, 2024 | Mar 26, 2030 | Miami International Holdings Inc | 9,174 | 0 | D |
Explanation of responses
- F1The amount represents restricted stock units ("RSUs") that fully vested on the date of grant. Each RSU represents a right to receive one share of the Issuer's common stock.
- F2The amount represents RSUs that vest on the last business day immediately preceding the 2027 annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.
- F3These options are fully vested.
Remarks
The Reporting Person, an employee of Horizon Kinetics Asset Management LLC and/or one of its affiliates (collectively, "HKAM"), is a member of the board of directors of the Issuer. HKAM has filed reports with the Securities and Exchange Commission reporting securities of the Issuer that it may be deemed to beneficially own. The Reporting Person does not exercise discretion of the securities of the Issuer and disclaims beneficial ownership that may be deemed to be beneficially owned by HKAM except to the extent of his pecuniary interest, if any.