SEC Form 4 · accession 0002080878-26-000012
MIAMI INTERNATIONAL HOLDINGS, INC. · MIAX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Barbara J. Comly
Officer — EVP, GC & Corporate Secretary
Period of report
Aug 4, 2026
Accepted (ET)
Aug 6, 2026 · 4:09 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001438472
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Aug 4, 2026 | M | 44,445 | $12.00 | A | 927,429 | D | |
| Common StockF2 | Aug 4, 2026 | S | 44,445 | $45.69 | D | 882,984 | 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)F1,F3 | $12.00 | Aug 4, 2026 | M | 44,445 | D | — | May 28, 2028 | Common Stock | 44,445 | 88,889 | D |
Explanation of responses
- F1This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 18, 2025.
- F2This 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.
- F3The options are fully vested.