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MIAMI INTERNATIONAL HOLDINGS, INC.

MIAX
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Top Institutional HoldersFrom 13F filings
FundShares HeldPosition ValueAction (latest Q)
Citadel
Ken Griffin
691K$30.67MNEW
Renaissance Technologies
Jim Simons (founder)
195K$8.66MNEW
Soros Fund Management
George Soros (founder)
155K$6.86MNEW
Blackstone75K$3.33MNEW
Politicians who traded MIAXFrom Senate & House PTRs
PoliticianDateTypeAmount
Gilbert Cisneros
D-CA
2026-03-20purchase$15k – $50k
About MIAMI INTERNATIONAL HOLDINGS, INC.

Miami International Holdings, Inc. is a leading operator and holding company specializing in the development and management of regulated financial markets across multiple asset classes. The company’s expansive portfolio includes U.S.-based exchanges such as Miami International Securities Exchange, MIAX Pearl, MIAX Emerald, and MIAX Sapphire, each delivering advanced electronic trading platforms focused on options and equities. Miami International Holdings also owns and operates MIAX Futures, which provides trading and clearing services for futures and options, as well as international platforms like the Bermuda Stock Exchange and The International Stock Exchange. Through its proprietary, high-performance trading technology, the company ensures reliability, speed, and efficiency in market operations. Miami International Holdings plays a pivotal role in the infrastructure of both domestic and international capital markets, facilitating trading in options, equities, futures, and structured products for a diverse, global clientele. Its operations contribute significantly to financial market innovation, efficiency, and transparency, supporting institutional and professional market participants worldwide.

CEO
Mr. Thomas P. Gallagher Esq.
Employees
439
Quick Facts
Exchange–
SectorFinancial Services
IndustryCapital Markets
Market Cap–
Key Dates

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