MIAMI INTERNATIONAL HOLDINGS INC (MIAX) — insider trading
Financials · NYSE
MIAMI INTERNATIONAL HOLDINGS INC (MIAX) has 43 reported SEC Form 4 insider transactions in our data, including 12 open-market sales among the most recent 43 (latest 2026-07-15).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-07-15 | Schwarzkopf Cynthia | Director | Option exercise / conversion (derivative) | 5,000 | $0.00 | $0 | Form 4 |
| 2026-07-15 | Schwarzkopf Cynthia | Director | Open-market sale | 5,000 | $42.00 | $210.0K | Form 4 |
| 2026-07-15 | Schwarzkopf Cynthia | Director | Option exercise / conversion | 5,000 | $12.00 | $60.0K | Form 4 |
| 2026-07-13 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Option exercise / conversion (derivative) | 70,000 | $0.00 | $0 | Form 4 |
| 2026-07-13 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Open-market sale | 70,000 | $42.52 | $2.98M | Form 4 |
| 2026-07-13 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Option exercise / conversion | 70,000 | $12.00 | $840.0K | Form 4 |
| 2026-07-13 | Comly Barbara J. | Officer (EVP, GC & Corporate Secretary) | Option exercise / conversion (derivative) | 28,000 | $0.00 | $0 | Form 4 |
| 2026-07-13 | Comly Barbara J. | Officer (EVP, GC & Corporate Secretary) | Open-market sale | 28,000 | $41.98 | $1.18M | Form 4 |
| 2026-07-13 | Comly Barbara J. | Officer (EVP, GC & Corporate Secretary) | Option exercise / conversion | 28,000 | $12.00 | $336.0K | Form 4 |
| 2026-07-08 | BROWN DAVID A | Director | Shares withheld for taxes / exercise cost | 171 | $43.72 | $7.5K | Form 4 |
| 2026-07-07 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Option exercise / conversion (derivative) | 28,228 | $0.00 | $0 | Form 4 |
| 2026-07-07 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Open-market sale | 28,228 | $42.27 | $1.19M | Form 4 |
| 2026-07-07 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Option exercise / conversion | 28,228 | $12.00 | $338.7K | Form 4 |
| 2026-07-06 | Brown Shelly | Officer (EVP, Chief Strategy Officer) | Option exercise / conversion (derivative) | 16,000 | $0.00 | $0 | Form 4 |
| 2026-07-06 | Brown Shelly | Officer (EVP, Chief Strategy Officer) | Open-market sale | 16,000 | $42.13 | $674.1K | Form 4 |
| 2026-07-06 | Brown Shelly | Officer (EVP, Chief Strategy Officer) | Option exercise / conversion | 16,000 | $12.00 | $192.0K | Form 4 |
| 2026-07-06 | Deitzel Edward | Officer (EVP, CRO, CCO MIAX Exchanges) | Option exercise / conversion (derivative) | 3,667 | $0.00 | $0 | Form 4 |
| 2026-07-06 | Deitzel Edward | Officer (EVP, CRO, CCO MIAX Exchanges) | Option exercise / conversion (derivative) | 7,333 | $0.00 | $0 | Form 4 |
| 2026-07-06 | Deitzel Edward | Officer (EVP, CRO, CCO MIAX Exchanges) | Open-market sale | 11,000 | $42.04 | $462.4K | Form 4 |
| 2026-07-06 | Deitzel Edward | Officer (EVP, CRO, CCO MIAX Exchanges) | Option exercise / conversion | 3,667 | $12.00 | $44.0K | Form 4 |
| 2026-07-06 | Deitzel Edward | Officer (EVP, CRO, CCO MIAX Exchanges) | Option exercise / conversion | 7,333 | $12.00 | $88.0K | Form 4 |
| 2026-07-06 | Jayabalan Harish | Officer (EVP, CISO and CRO) | Option exercise / conversion (derivative) | 2,499 | $0.00 | $0 | Form 4 |
| 2026-07-06 | Jayabalan Harish | Officer (EVP, CISO and CRO) | Option exercise / conversion (derivative) | 16,667 | $0.00 | $0 | Form 4 |
| 2026-07-06 | Jayabalan Harish | Officer (EVP, CISO and CRO) | Option exercise / conversion (derivative) | 834 | $0.00 | $0 | Form 4 |
| 2026-07-06 | Jayabalan Harish | Officer (EVP, CISO and CRO) | Open-market sale | 20,000 | $42.12 | $842.4K | Form 4 |
| 2026-07-06 | Jayabalan Harish | Officer (EVP, CISO and CRO) | Option exercise / conversion | 2,499 | $12.00 | $30.0K | Form 4 |
| 2026-07-06 | Jayabalan Harish | Officer (EVP, CISO and CRO) | Option exercise / conversion | 16,667 | $12.00 | $200.0K | Form 4 |
| 2026-07-06 | Jayabalan Harish | Officer (EVP, CISO and CRO) | Option exercise / conversion | 834 | $12.00 | $10.0K | Form 4 |
| 2026-07-06 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Option exercise / conversion (derivative) | 41,772 | $0.00 | $0 | Form 4 |
| 2026-07-06 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Open-market sale | 41,772 | $42.09 | $1.76M | Form 4 |
| 2026-07-06 | Gallagher Thomas P. | Director, Officer (Chairman & CEO) | Option exercise / conversion | 41,772 | $12.00 | $501.3K | Form 4 |
| 2026-07-02 | Schafer Douglas M. JR | Officer (EVP and CIO) | Option exercise / conversion (derivative) | 42,000 | $0.00 | $0 | Form 4 |
| 2026-07-02 | Schafer Douglas M. JR | Officer (EVP and CIO) | Option exercise / conversion (derivative) | 6,000 | $0.00 | $0 | Form 4 |
| 2026-07-02 | Schafer Douglas M. JR | Officer (EVP and CIO) | Open-market sale | 48,000 | $41.22 | $1.98M | Form 4 |
| 2026-07-02 | Schafer Douglas M. JR | Officer (EVP and CIO) | Option exercise / conversion | 42,000 | $12.00 | $504.0K | Form 4 |
| 2026-07-02 | Schafer Douglas M. JR | Officer (EVP and CIO) | Option exercise / conversion | 6,000 | $12.00 | $72.0K | Form 4 |
| 2026-07-02 | Comly Barbara J. | Officer (EVP, GC & Corporate Secretary) | Option exercise / conversion (derivative) | 28,000 | $0.00 | $0 | Form 4 |
| 2026-07-02 | Comly Barbara J. | Officer (EVP, GC & Corporate Secretary) | Open-market sale | 28,000 | $41.22 | $1.15M | Form 4 |
| 2026-07-02 | Comly Barbara J. | Officer (EVP, GC & Corporate Secretary) | Option exercise / conversion | 28,000 | $12.00 | $336.0K | Form 4 |
| 2026-07-02 | Eckert Kurt M. | Director | Option exercise / conversion (derivative) | 5,250 | $0.00 | $0 | Form 4 |
| 2026-07-02 | Eckert Kurt M. | Director | Open-market sale | 5,250 | $39.35 | $206.6K | Form 4 |
| 2026-07-02 | Eckert Kurt M. | Director | Option exercise / conversion | 5,250 | $12.00 | $63.0K | Form 4 |
| 2026-07-02 | Teekell Judson Gray | Director | Open-market sale | 3,000 | $40.00 | $120.0K | Form 4 |
Ask the chat about MIAX's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: MIAMI INTERNATIONAL HOLDINGS INC (MIAX).
Last updated 2026-07-15 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.