Shelly Brown sold $819K of MIAX stock

Shelly Brown, EVP, Chief Strategy Officer of Miami International Holdings, Inc. (MIAX), sold 21,217 shares of MIAX stock worth $819K, per an SEC Form 4 filed Sep 17, 2026.

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

The trade happened on Sep 16, 2026, 1 day before it was made public.

MIAX has moved -7.6% since the trade date, from $38.04 to $35.14 (Nov 9, 2026 close).