Accessibility StatementSkip Navigation 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 (MIAXdxâ"¢), a wholly owned subsidiary ...