# Thomas Gallagher

> Thomas P. Gallagher is a co-founder, chairman and chief executive of Miami International Holdings, the company behind MIAX. A former founding partner of Gallagher, Briody & Butler, he became MIAX chairman in 2008 and CEO in 2012. His tenure includes options exchange launches, international expansion, a 2025 IPO and the opening of MIAX Sapphire’s Miami trading floor.

- **Role:** Co-founder, Chairman and Chief Executive Officer at Miami International Holdings (MIAX)
- **Organizations:** Miami International Holdings, Inc. (MIAX), MIAX Futures Exchange, The Bermuda Stock Exchange, The International Stock Exchange Group Limited, Gallagher, Briody & Butler (former founding partner), The Hun School of Princeton (trustee emeritus)
- **Nationality:** Irish (self-described dual citizen during the 2021 SALT panel; second citizenship not specified there)
- **Education:** Juris Doctor, Capital University Law School, Rutgers University
- **Known for:** Co-founded MIAX and led it as CEO from 2012., Led MIAX through its 2025 IPO., FOW Chief Executive of the Year, awarded February 2026.

## Career timeline

- **2008** — Became chairman of MIAX and the company.
- **2012** — Became CEO; joined full time in December and ended his law firm association. MIAX Options launched December 7.
- **2017** — MIAX Pearl Options launched in February.
- **2019** — MIAX Emerald launched; Gallagher joined the BSX Council and MGEX board.
- **2020** — Became BSX Council chairman in February.
- **2021** — Became chairman of the MGEX board in June.
- **2024** — MIAX Sapphire electronic exchange launched in August.
- **2025** — Became TISEG chairman in June; MIAX completed its IPO in August; Sapphire’s physical floor launched in September.
- **2026** — Received FOW Chief Executive of the Year recognition; MIAX expanded its financial and agricultural futures products.

## Achievements

- Co-founded MIAX and led it as CEO from 2012.
- Led MIAX through its 2025 IPO.
- FOW Chief Executive of the Year, awarded February 2026.
- Named to TabbFORUM 40 in 2022, 2023 and 2024.

## Latest updates

- **2026-10** — On October 21 MIAX launched four physically settled fertilizer futures on Onyx, cleared by MIAX Futures Clearing.
- **2026-10** — On October 15 MIAX announced Tini Bloomberg 500 and 100 futures access for eligible NinjaTrader customers.
- **2026-10** — On October 6 MIAX reported 11.0 million year-to-date average daily options contracts through September and 17.1% year-to-date market share.
- **2026-02** — Gallagher received FOW’s Chief Executive of the Year award at the February 12 London ceremony.

## Links

- Website: https://www.miaxglobal.com/company/about/leadership/thomas-gallagher
- LinkedIn: https://www.linkedin.com/in/thomas-gallagher-39638b197

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Profile page: https://yespress.io/thomas-gallagher
Published by YesPress — https://yespress.io
Last updated: 2026-10-22