Sean O’Connor

Executive Vice-Chairman StoneX Group

Last Reviewed: October 1, 2026

Executive Summary

Sean O’Connor led StoneX Group as Chief Executive Officer for more than two decades, from 2002 until December 2024, when he became Executive Vice-Chairman and handed the chief executive role to Philip Smith. He joined in 2002 after making a significant equity investment in the company, and guided its growth from that point. In his current role he concentrates on longer-term strategy, capital allocation and mergers and acquisitions. Before StoneX he ran Standard New York Securities for Standard Bank. StoneX Group ranked No. 31 on the 2026 Fortune 500.

Career Highlights

• Executive Vice-Chairman of StoneX Group since December 2024.
• Chief Executive Officer of StoneX Group, 2002 to 2024.
• President of StoneX Group, 2015 to 2024.
• Director of StoneX Group since 2002.
• Chief Executive Officer of Standard New York Securities, 1994 to 2002.

Professional Journey

O’Connor was Chief Executive Officer of Standard New York Securities, a division of Standard Bank, from 1994 to 2002, and from 1999 also an Executive Director of Standard Bank London.

In 2002 he made a significant equity investment in the company that became StoneX and joined it in October as Chief Executive Officer and a director. He also served as President from 2015.

In December 2024 he became Executive Vice-Chairman, focused on longer-term strategy, capital allocation and acquisitions.

Education

No first-party source read for this profile states his education.