Douglas M. Schafer Jr sold $2.1M 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 $2.1M, per an SEC Form 4 filed Jun 4, 2026.

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

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

MIAX has moved -11.0% since the trade date, from $42.51 to $37.84 (Sep 21, 2026 close).