Form 4 for MIAX MIAMI INTERNATIONAL HOLDINGS, INC.
Accepted 2025-08-19 00:00:00 ET · period of report 2025-08-15 · accession 0001628280-25-040787 · 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 | 2025-08-19 | 2025-08-15 | MIAX | Comly Barbara J. | EVP, GC, Corp. Sec | C - Cnv Deriv | — | +231.1K | 812.0K | +40% | — |
| DM | 2025-08-19 | 2025-08-15 | MIAX | Comly Barbara J. | EVP, GC, Corp. Sec | M - OptEx | $0.00 | 0 | 0 | New | $0 |
| DM | 2025-08-19 | 2025-08-15 | MIAX | Comly Barbara J. | EVP, GC, Corp. Sec | C - Cnv Deriv | $0.00 | -231.1K | 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 | 2025-08-15 | C | A | 130,617 | — | 811,960 | D | — | — | (F2) Represents 130,617 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date. |
| 2 | Common | Common Stock | 2025-08-15 | C | A | 100,500 | — | 811,960 | D | — | — | (F1) Represents 100,500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date. |
| 3 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | A | 141,667 | $0.00 | 141,667 | D | $12.00 · — to 2026-08-02 | 141,667 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 4 | Derivative | Incentive Stock Option (Right to Buy) | 2025-08-15 | M | A | 13,140 | $0.00 | 13,140 | D | $15.22 · — to 2031-01-27 | 13,140 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 5 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | A | 133,334 | $0.00 | 133,334 | D | $12.00 · — to 2028-05-28 | 133,334 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 6 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | D | 141,667 | $0.00 | 0 | D | $12.00 · — to 2029-07-31 | 141,667 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |
| 7 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | A | 141,667 | $0.00 | 141,667 | D | $12.00 · — to 2029-07-31 | 141,667 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 8 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | D | 136,860 | $0.00 | 0 | D | $15.22 · — to 2031-01-27 | 136,860 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |
| 9 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | A | 136,860 | $0.00 | 136,860 | D | $15.22 · — to 2031-01-27 | 136,860 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 10 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | D | 150,000 | $0.00 | 0 | D | $16.14 · — to 2031-09-09 | 150,000 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |
| 11 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | A | 150,000 | $0.00 | 150,000 | D | $16.14 · — to 2031-09-09 | 150,000 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 12 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | D | 141,667 | $0.00 | 0 | D | $12.00 · — to 2026-08-02 | 141,667 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |
| 13 | Derivative | Series B Preferred Stock | 2025-08-15 | C | D | 100,500 | $0.00 | 0 | D | — · — to — | 100,500 Common Stock | (F1) Represents 100,500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date. |
| 14 | Derivative | Nonvoting Common Stock | 2025-08-15 | C | D | 130,617 | $0.00 | 0 | D | — · — to — | 130,617 Common Stock | (F2) Represents 130,617 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date. |
| 15 | Derivative | Incentive Stock Option (Right to Buy) | 2025-08-15 | M | D | 8,333 | $0.00 | 0 | D | $12.00 · — to 2026-08-02 | 8,333 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |
| 16 | Derivative | Incentive Stock Option (Right to Buy) | 2025-08-15 | M | A | 8,333 | $0.00 | 8,333 | D | $12.00 · — to 2026-08-02 | 8,333 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 17 | Derivative | Incentive Stock Option (Right to Buy) | 2025-08-15 | M | D | 16,666 | $0.00 | 0 | D | $12.00 · — to 2028-05-28 | 16,666 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |
| 18 | Derivative | Incentive Stock Option (Right to Buy) | 2025-08-15 | M | A | 16,666 | $0.00 | 16,666 | D | $12.00 · — to 2028-05-28 | 16,666 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 19 | Derivative | Incentive Stock Option (Right to Buy) | 2025-08-15 | M | D | 8,333 | $0.00 | 0 | D | $12.00 · — to 2029-07-31 | 8,333 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |
| 20 | Derivative | Incentive Stock Option (Right to Buy) | 2025-08-15 | M | A | 8,333 | $0.00 | 8,333 | D | $12.00 · — to 2029-07-31 | 8,333 Common Stock | (F3) 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. (F4) The options are fully vested. |
| 21 | Derivative | Incentive Stock Option (Right to Buy) | 2025-08-15 | M | D | 13,140 | $0.00 | 0 | D | $15.22 · — to 2031-01-27 | 13,140 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |
| 22 | Derivative | Nonqualified Stock Option (Right to Buy) | 2025-08-15 | M | D | 133,334 | $0.00 | 0 | D | $12.00 · — to 2028-05-28 | 133,334 Nonvoting Common Stock | (F3) 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. (F4) The options are fully vested. |