Miami International Holdings Inc.
Last updated September 27, 2026
Organization details
- Legal name
- Miami International Holdings Inc.
- Ownership
- Public
- Status
- Active
- Headquarters country
- United States
- Ticker symbol
- MIAX
- Primary stock exchange
- NYSE
Identifiers
- SEC CIK
- 0001438472
Board of directors
-
Cynthia Schwarzkopf · DirectorSince 2025
-
David A. Brown · DirectorSince 2025
-
Jamil Nazarali · DirectorSince 2025
-
Jill E. Sommers · DirectorSince 2026
-
John Beckelman · DirectorSince 2025
-
Judson Gray Teekell · DirectorSince 2025
-
Kenneth W. Lozier · DirectorSince 2025
-
Kurt M. Eckert · DirectorSince 2025
-
Lee Becker · DirectorSince 2025
-
Lisa Moore · DirectorSince 2025
-
Mark F. Raymond · DirectorSince 2025
-
Mark I. Massad · DirectorSince 2025
-
Murray Stahl · DirectorSince 2025
-
Paul Stahlin · DirectorSince 2025
-
Talal Jassim Al-Bahar · DirectorSince 2025
-
Thomas P. Gallagher · Director · Chairman & CEOSince 2025
Chief executives
Thomas P. Gallagher
· Chairman & CEO
Since August 2025
Board connections
2 of this board's directors also sit on 3 other boards.
- via David A. Brown
- via Murray Stahl
- via Murray Stahl
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
- Bought, last 12 months
- $100,083
- 2 purchases by 1 insider
- Sold, last 12 months
- $0
- 0 sales by 0 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Dec 23, 2025 | Thomas P. Gallagher Director, Officer (Chairman & CEO) | Gift | −2,000 | — | — |
| Dec 16, 2025 | Brown Shelly Officer (EVP, Chief Strategy Officer) | Option exercise | +16,666 | $12.00 | $199,992 |
| Dec 16, 2025 | Emmons Lance Officer (EVP and CFO) | Option exercise | +22,221 | $13.50 | $299,984 |
| Dec 16, 2025 | Brown Shelly Officer (EVP, Chief Strategy Officer) | Option exercise | +8,333 | $12.00 | $99,996 |
| Dec 16, 2025 | Emmons Lance Officer (EVP and CFO) | Option exercise | +6,195 | $16.14 | $99,987 |
| Dec 16, 2025 | Brown Shelly Officer (EVP, Chief Strategy Officer) | Option exercise | +8,333 | $12.00 | $99,996 |
| Dec 16, 2025 | Emmons Lance Officer (EVP and CFO) | Option exercise | +5,040 | $19.84 | $99,994 |
| Dec 12, 2025 | Murray Stahl Director, 10% owner | Open-market purchase | +2,439 | $41.00 | $99,999 |
| Oct 3, 2025 | Murray Stahl Director, 10% owner | Open-market purchase | +2 | $41.97 | $84 |
| Sep 26, 2025 | Murray Stahl Director, 10% owner | Open-market purchase | +4 | $41.76 | $167 |
| Sep 11, 2025 | Smollen John Officer (EVP Traded Products & Relation) | Option exercise | +125,001 | $12.00 | $1,500,012 |
| Sep 11, 2025 | Smollen John Officer (EVP Traded Products & Relation) | Shares withheld for tax | −52,054 | $37.39 | $1,946,299 |
| Sep 11, 2025 | Smollen John Officer (EVP Traded Products & Relation) | Option exercise | +24,999 | $12.00 | $299,988 |
| Sep 11, 2025 | Deitzel Edward Officer (EVP, CRO, CCO MIAX Exchanges) | Option exercise | +16,666 | $12.00 | $199,992 |
| Sep 10, 2025 | Brown Shelly Officer (EVP, Strat. Planning & BD) | Shares withheld for tax | −16,283 | $36.81 | $599,377 |
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