Thomas P. Gallagher
Chairman & CEO at Miami International Holdings Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 1 year
- Director since
- 2025
1 year of board service in total across 1 board, counting each seat separately. Longest: Miami International Holdings Inc., 1 year.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
Miami International Holdings Inc. June 16, 202699.0%
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.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 3, 2026 | Miami International Holdings Inc. | Option exercise | +47,000 | $12.00 | $564,000 |
| Sep 3, 2026 | Miami International Holdings Inc. | Open-market sale | −47,000 | $42.43 | $1,994,210 |
| Sep 3, 2026 | Miami International Holdings Inc. | Option exercise | +16,666 | $12.00 | $199,992 |
| Sep 3, 2026 | Miami International Holdings Inc. | Option exercise | +8,333 | $12.00 | $99,996 |
| Sep 3, 2026 | Miami International Holdings Inc. | Option exercise | +13,140 | $15.22 | $199,991 |
| Sep 3, 2026 | Miami International Holdings Inc. | Option exercise | +4,464 | $22.40 | $99,994 |
| Aug 19, 2026 | Miami International Holdings Inc. | Open-market sale | −149,700 | $41.13 | $6,157,161 |
| Aug 18, 2026 | Miami International Holdings Inc. | Shares withheld for tax | −150,300 | $42.41 | $6,374,223 |
| Aug 4, 2026 | Miami International Holdings Inc. | Option exercise | +48,334 | $12.00 | $580,008 |
| Aug 4, 2026 | Miami International Holdings Inc. | Open-market sale | −48,334 | $45.69 | $2,208,380 |
| Jul 13, 2026 | Miami International Holdings Inc. | Option exercise | +70,000 | $12.00 | $840,000 |
| Jul 13, 2026 | Miami International Holdings Inc. | Open-market sale | −70,000 | $42.52 | $2,976,400 |
| Jul 7, 2026 | Miami International Holdings Inc. | Option exercise | +28,228 | $12.00 | $338,736 |
| Jul 7, 2026 | Miami International Holdings Inc. | Open-market sale | −28,228 | $42.27 | $1,193,198 |
| Jul 6, 2026 | Miami International Holdings Inc. | Option exercise | +41,772 | $12.00 | $501,264 |
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