26 insiders reported 202 Form 4 transactions for MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) over the past 18 months (most recent 2026-07-07). Recent activity: Teekell Judson Gray (Director) Sell 3,000 shares, Jayabalan Harish (EVP, CISO and CRO) Sell 20,000 shares, Gallagher Thomas P. (Chairman & CEO) Buy 41,772 shares, Brown Shelly (EVP, Chief Strategy Officer) Buy 16,000 shares, Jayabalan Harish (EVP, CISO and CRO) Buy 834 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-07 | Teekell Judson Gray | Director | Sell | 3,000 | $120,000 |
| 2026-07-07 | Jayabalan Harish | EVP, CISO and CRO | Sell | 20,000 | $842,400 |
| 2026-07-07 | Gallagher Thomas P. | Chairman & CEO | Buy | 41,772 | $501,264 |
| 2026-07-07 | Brown Shelly | EVP, Chief Strategy Officer | Buy | 16,000 | $192,000 |
| 2026-07-07 | Jayabalan Harish | EVP, CISO and CRO | Buy | 834 | $10,008 |
| 2026-07-07 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | Buy | 7,333 | $87,996 |
| 2026-07-07 | Eckert Kurt M. | Director | Buy | 5,250 | $63,000 |
| 2026-07-07 | Schafer Douglas M. JR | EVP and CIO | Buy | 6,000 | $72,000 |
| 2026-07-07 | Schafer Douglas M. JR | EVP and CIO | Buy | 42,000 | $504,000 |
| 2026-07-07 | Gallagher Thomas P. | Chairman & CEO | Sell | 41,772 | $1.8M |
| 2026-07-07 | Brown Shelly | EVP, Chief Strategy Officer | Sell | 16,000 | $674,080 |
| 2026-07-07 | Jayabalan Harish | EVP, CISO and CRO | Buy | 16,667 | $200,004 |
| 2026-07-07 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | Buy | 3,667 | $44,004 |
| 2026-07-07 | Eckert Kurt M. | Director | Sell | 5,250 | $206,588 |
| 2026-07-07 | Comly Barbara J. | EVP, GC & Corporate Secretary | Sell | 28,000 | $1.2M |
| 2026-07-07 | Schafer Douglas M. JR | EVP and CIO | Sell | 48,000 | $2.0M |
| 2026-07-07 | Gallagher Thomas P. | Chairman & CEO | Buy | 28,228 | $338,736 |
| 2026-07-07 | Jayabalan Harish | EVP, CISO and CRO | Buy | 2,499 | $29,988 |
| 2026-07-07 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | Sell | 11,000 | $462,440 |
| 2026-07-07 | Gallagher Thomas P. | Chairman & CEO | Sell | 28,228 | $1.2M |
| 2026-07-07 | Comly Barbara J. | EVP, GC & Corporate Secretary | Buy | 28,000 | $336,000 |
| 2026-06-18 | Schafer Douglas M. JR | EVP and CIO | Buy | 23,298 | $0 |
| 2026-06-18 | Comly Barbara J. | EVP, GC & Corporate Secretary | Buy | 39,140 | $0 |
| 2026-06-18 | Smollen John | EVP, New Product Development | Buy | 7,455 | $0 |
| 2026-06-18 | Emmons Lance | EVP and CFO | Buy | 37,276 | $0 |
Source: SEC Form 4 filings · as of 2026-07-07