Exhibit 21.1

SIGNIFICANT SUBSIDIARIES OF MIAMI INTERNATIONAL HOLDINGS, INC.

Name of Subsidiary						Jurisdiction of Organization
Miami International Securities Exchange, LLC						Delaware
MIAX PEARL, LLC						Delaware
MIAX Emerald, LLC						Delaware
MIAX Sapphire, LLC						Delaware
Miami International Technologies, LLC						Delaware
MIAX Global, LLC						Delaware
M 9 Holdings, LLC						Delaware
MIAX Products, LLC						Illinois
MIAX Global Derivatives, LLC						Delaware
M 402 Holdings, LLC						Delaware
MIAX Futures Exchange, LLC						Delaware
M 7 Holdings, LLC						Delaware
LedgerX LLC d/b/a MIAX Derivatives Exchange						Delaware
Dorman Trading, LLC						Illinois
The Bermuda Stock Exchange						Bermuda
BSD Nominee Ltd.						Bermuda
MGEX Real Estate Holdings, LLC						Delaware
MIH East Holdings, Limited						England and Wales
The International Stock Exchange Group Limited						Guernsey
The International Stock Exchange Authority Limited						Guernsey