Thomas is Non-Executive Chair of the Board of The International Stock Exchange Group Limited, serving as a non-independent Non-Executive Director of the Company since June 2025.

Background, Experience and Skills

Thomas is one of the founders of Miami International Holdings, Inc. (MIH) and has served as the Chairman of the Board of MIH and the MIAX Exchanges since 2008. Thomas has been serving as the Chief Executive Officer of MIH and the MIAX Exchanges since 2012. He was a founding partner of the law firm Gallagher, Briody & Butler, a corporate and securities law firm located in Princeton, New Jersey, and was associated with the firm until joining MIH full time in December 2012. 

Thomas has been a director of MIAX Global, LLC since June 2015 and MIAX Futures Exchange, LLC (formerly the Minneapolis Grain Exchange, LLC), since October 2019, becoming Chairman of the MIAX Futures Board of Directors in June 2021. Thomas has also been a member of The Bermuda Stock Exchange Council (BSX) since July 2019, becoming Chairman of the BSX Council in February 2020. He also serves as the Chairman and Executive Officer of several of MIH's subsidiaries.