Thomas P. Gallagher sold $3M of Miami International Holdings, Inc. (MIAX) stock

Thomas P. Gallagher, Chairman & CEO of Miami International Holdings, Inc. (MIAX), sold 70,000 shares of MIAX stock worth $3M, per an SEC Form 4 filed Jul 14, 2026.

The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.

The trade happened on Jul 13, 2026, 1 day before it was made public.

MIAX has moved -27.4% since the trade date, from $42.31 to $30.71 (Oct 9, 2026 close).