Form 4 for MIAX MIAMI INTERNATIONAL HOLDINGS, INC.
Accepted 2026-03-10 00:00:00 ET · period of report 2026-03-09 · accession 0002080878-26-000002 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-03-10 | 2026-03-09 | MIAX | Comly Barbara J. | EVP, GC, Corp. Sec | M - OptEx | $12.00 | +33.3K | 845.3K | +4% | +$400.0K |
| DM | 2026-03-10 | 2026-03-09 | MIAX | Comly Barbara J. | EVP, GC, Corp. Sec | M - OptEx | $0.00 | -33.3K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-03-09 | M | A | 8,333 | $12.00 | 820,293 | D | — | — | |
| 2 | Common | Common Stock | 2026-03-09 | M | A | 8,333 | $12.00 | 828,626 | D | — | — | |
| 3 | Common | Common Stock | 2026-03-09 | M | A | 16,666 | $12.00 | 845,292 | D | — | — | |
| 4 | Derivative | Incentive Stock Option (Right to Buy) | 2026-03-09 | M | D | 8,333 | $0.00 | 0 | D | $12.00 · — to 2026-08-02 | 8,333 Common Stock | (F1) The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions. (F2) The options are fully vested. |
| 5 | Derivative | Incentive Stock Option (Right to Buy) | 2026-03-09 | M | D | 8,333 | $0.00 | 0 | D | $12.00 · — to 2029-07-31 | 8,333 Common Stock | (F1) The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions. (F2) The options are fully vested. |
| 6 | Derivative | Incentive Stock Option (Right to Buy) | 2026-03-09 | M | D | 16,666 | $0.00 | 0 | D | $12.00 · — to 2028-05-28 | 16,666 Common Stock | (F1) The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions. (F2) The options are fully vested. |