Form 4 for MIAX MIAMI INTERNATIONAL HOLDINGS, INC.
Accepted 2026-06-04 16:40:40 ET · period of report 2026-06-02 · accession 0002079445-26-000009 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-06-04 16:40 | 2026-06-02 | MIAX | Schafer Douglas M. JR | EVP, CIO | M - OptEx | $12.00 | +48.0K | 444.7K | +12% | +$576.0K |
| DT | 2026-06-04 16:40 | 2026-06-02 | MIAX | Schafer Douglas M. JR | EVP, CIO | S - Sale+OE | $42.84 | -48.0K | 396.7K | -11% | -$2.06M |
| DT | 2026-06-04 16:40 | 2026-06-02 | MIAX | Schafer Douglas M. JR | EVP, CIO | M - OptEx | $0.00 | -48.0K | 6,000 | -89% | $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 | 2026-06-02 | M | A | 48,000 | $12.00 | 444,681 | D | — | — | (F1) This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. |
| 2 | Common | Common Stock | 2026-06-02 | S | D | 48,000 | $42.84 | 396,681 | D | — | — | (F1) This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. (F2) This transaction was executed in multiple trades throughout the day at prices ranging from $41.23 to $45.73. 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. |
| 3 | Derivative | Nonqualified Stock Option (Right to Buy) | 2026-06-02 | M | D | 48,000 | $0.00 | 6,000 | D | $12.00 · — to 2026-08-02 | 48,000 Common Stock | (F1) This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. (F3) The options are fully vested. |