MIAX · Insider Trading
Miami International Holdings, Inc.
Every open-market purchase and sale reported by MIAX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-29 | Harish Jayabalan | EVP, CISO and CRO | M | — | — |
| 2026-09-17 | Shelly Brown | EVP, Chief Strategy Officer | Sell | — | — |
| 2026-09-11 | Shelly Brown | EVP, Chief Strategy Officer | F | — | — |
| 2026-09-04 | Judson Gray Teekell | Director | Sell | — | — |
| 2026-09-04 | Edward Deitzel | EVP, CRO, CCO MIAX Exchanges | MIXED | — | — |
| 2026-09-04 | Thomas P. Gallagher | Chairman & CEO | MIXED | — | — |
| 2026-09-04 | Douglas M. Schafer JR | EVP and CIO | MIXED | — | — |
| 2026-09-04 | Barbara J. Comly | EVP, GC & Corporate Secretary | MIXED | — | — |
| 2026-08-20 | Barbara J. Comly | EVP, GC & Corporate Secretary | F | — | — |
| 2026-08-20 | Thomas P. Gallagher | Chairman & CEO | MIXED | — | — |
| 2026-08-19 | Lance Emmons | EVP and CFO | Sell | — | — |
| 2026-08-19 | Cynthia Schwarzkopf | Director | MIXED | — | — |
| 2026-08-06 | Judson Gray Teekell | Director | Sell | — | — |
| 2026-08-06 | Kurt M. Eckert | Director | MIXED | — | — |
| 2026-08-06 | Douglas M. Schafer JR | EVP and CIO | MIXED | — | — |
| 2026-08-06 | Edward Deitzel | EVP, CRO, CCO MIAX Exchanges | MIXED | — | — |
| 2026-08-06 | Barbara J. Comly | EVP, GC & Corporate Secretary | MIXED | — | — |
| 2026-08-06 | Thomas P. Gallagher | Chairman & CEO | MIXED | — | — |
| 2026-08-06 | Harish Jayabalan | EVP, CISO and CRO | MIXED | — | — |
| 2026-08-06 | Barbara J. Comly | EVP, GC & Corporate Secretary | MIXED | — | — |
| 2026-08-06 | Kurt M. Eckert | Director | MIXED | — | — |
| 2026-08-06 | Judson Gray Teekell | Director | Sell | — | — |
| 2026-08-06 | Edward Deitzel | EVP, CRO, CCO MIAX Exchanges | MIXED | — | — |
| 2026-08-06 | Douglas M. Schafer JR | EVP and CIO | MIXED | — | — |
| 2026-08-06 | Thomas P. Gallagher | Chairman & CEO | MIXED | — | — |
| 2026-08-06 | Harish Jayabalan | EVP, CISO and CRO | MIXED | — | — |
| 2026-07-16 | Cynthia Schwarzkopf | Director | MIXED | — | — |
| 2026-07-14 | Barbara J. Comly | EVP, GC & Corporate Secretary | MIXED | — | — |
| 2026-07-14 | Thomas P. Gallagher | Chairman & CEO | MIXED | — | — |
| 2026-07-09 | DAVID A BROWN | Director | F | — | — |
| 2026-07-07 | Shelly Brown | EVP, Chief Strategy Officer | MIXED | — | — |
| 2026-07-07 | Kurt M. Eckert | Director | MIXED | — | — |
| 2026-07-07 | Judson Gray Teekell | Director | Sell | — | — |
| 2026-07-07 | Barbara J. Comly | EVP, GC & Corporate Secretary | MIXED | — | — |
| 2026-07-07 | Harish Jayabalan | EVP, CISO and CRO | MIXED | — | — |
| 2026-07-07 | Douglas M. Schafer JR | EVP and CIO | MIXED | — | — |
| 2026-07-07 | Edward Deitzel | EVP, CRO, CCO MIAX Exchanges | MIXED | — | — |
| 2026-07-07 | Thomas P. Gallagher | Chairman & CEO | MIXED | — | — |
| 2026-06-18 | John Smollen | EVP, New Product Development | A | — | — |
| 2026-06-18 | Harish Jayabalan | EVP, CISO and CRO | A | — | — |
| 2026-06-18 | Cees Vermaas | CEO of TISEG | A | — | — |
| 2026-06-18 | Thomas P. Gallagher | Chairman & CEO | A | — | — |
| 2026-06-18 | Lance Emmons | EVP and CFO | A | — | — |
| 2026-06-18 | Edward Deitzel | EVP, CRO, CCO MIAX Exchanges | A | — | — |
| 2026-06-18 | Barbara J. Comly | EVP, GC & Corporate Secretary | A | — | — |
| 2026-06-18 | Douglas M. Schafer JR | EVP and CIO | A | — | — |
| 2026-06-18 | Shelly Brown | EVP, Chief Strategy Officer | A | — | — |
| 2026-06-17 | Judson Gray Teekell | Director | A | — | — |
| 2026-06-17 | Lee Becker | Director | A | — | — |
| 2026-06-17 | Shelly Brown | EVP, Chief Strategy Officer | Sell | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Director | 4,673,020 | — |
| — | Director | 3,658,187 | — |
| — | Chairman & CEO | 2,192,213 | — |
| — | 10%+ Owner | 2,170,898 | — |
| — | EVP, GC & Corporate Secretary | 839,564 | — |
| — | EVP and CIO | 387,414 | — |
| — | EVP, Chief Strategy Officer | 316,490 | — |
| — | EVP, New Product Development | 269,878 | — |
| — | Director | 150,251 | — |
| — | Director | 149,612 | — |
| — | EVP, CRO, CCO MIAX Exchanges | 119,601 | — |
| — | Director | 88,545 | — |
| — | EVP and CFO | 86,542 | — |
| — | EVP, CISO and CRO | 86,398 | — |
| — | Director | 62,094 | — |
| — | Director | 42,143 | — |
| — | Director | 15,904 | — |
| — | Director | 12,737 | — |
| — | Director | 7,066 | — |
| — | Director | 6,267 | — |
| — | CEO of TISEG | 4,660 | — |
| — | Director | 3,267 | — |
| — | Director | 2,500 | — |
| — | Director | 2,267 | — |
| — | Director | 1,113 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the MIAX quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.