Miami International Holdings To Sell 90% Of MIAX Derivatives Exchange To Robinhood In Partnership With Susquehanna International Group; MIAX Will Retain The Remaining 10% Of The Issued And Outstanding Equity Of MIAXdx; No Financial Terms Disclosed

Miami International Holdings to Retain 10% Stake in the Exchange and Clearinghouse

PRINCETON, N.J. and MIAMI, Nov. 25, 2025 /PRNewswire/ -- Miami International Holdings, Inc. (MIAX®) (NYSE:MIAX), a technology-driven leader in building and operating regulated financial markets across multiple asset classes, today announced it has entered into an agreement to sell 90% of the issued and outstanding equity in MIAX Derivatives Exchange (MIAXdx™), a wholly owned subsidiary of MIAX, to Robinhood Markets, Inc. (Robinhood) (NASDAQ:HOOD) in partnership with Susquehanna International Group. MIAX will retain the remaining 10% of the issued and outstanding equity of MIAXdx.

MIAXdx is a Designated Contract Market (DCM) and Derivatives Clearing Organization (DCO) with regulatory approval from the Commodity Futures Trading Commission (CFTC) to list and clear fully collateralized futures, options on futures and swaps.