Douglas M. Schafer Jr sold $1.9M of Miami International Holdings, Inc. (MIAX) stock

Douglas M. Schafer Jr, EVP and CIO of Miami International Holdings, Inc. (MIAX), sold 48,000 shares of MIAX stock worth $1.9M, per an SEC Form 4 filed Sep 4, 2026.

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

The trade happened on Sep 2, 2026, 2 days before it was made public.

MIAX has moved -6.8% since the trade date, from $40.62 to $37.84 (Sep 21, 2026 close).