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Miami International Holdings, Inc. (MIAX)

NYSE: MIAX · Security Brokers, Dealers & Flotation Companies · Princeton, NJ · filing with the SEC since 2008
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Grade5.5
◀ Past 5.6● Present 5.5▶ Future 5.3
2 est.
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Who runs Miami International Holdings, Inc.

Officers and directors as they report to the SEC on Forms 3, 4 and 5, named as filed
Chief executive, as filed
Gallagher Thomas P.
Chairman & CEO. First filing Aug 2025, latest Sep 4, 2026, 10 filings in all.
Officers reporting now
9
of 26 people with a filing in the last fifteen months
Directors reporting now
17
26 people on the record since 2025
Officerssales are open-market, Nov 9, 2025 to Nov 9, 2026
NameTitle as filedFirst filingLatest filingSales, 12 months
Schafer Douglas M. JrEVP and CIOAug 2025Nov 5, 202610 · $15.6M
Comly Barbara J.EVP, GC & Corporate SecretaryAug 2025Nov 4, 202610 · $13.2M
Jayabalan HarishEVP, CISO and CROAug 2025Sep 29, 20264 · $2.6M
Brown ShellyEVP, Chief Strategy OfficerAug 2025Sep 17, 202611 · $5.1M
Gallagher Thomas P.Chairman & CEOAug 2025Sep 4, 202612 · $32.3M
Deitzel EdwardEVP, CRO, CCO MIAX ExchangesAug 2025Sep 4, 20268 · $2.9M
Emmons LanceEVP and CFOAug 2025Aug 19, 20262 · $3.5M
Vermaas CeesCEO of TISEGAug 2025Jun 18, 2026none
Smollen JohnEVP, New Product DevelopmentAug 2025Jun 18, 2026none
Directorssales are open-market, Nov 9, 2025 to Nov 9, 2026
NameRoleFirst filingLatest filingSales, 12 months
Teekell Judson GraydirectorAug 2025Nov 9, 20268 · $1.0M
Schwarzkopf CynthiadirectorAug 2025Aug 19, 20263 · $1.2M
Eckert Kurt M.directorAug 2025Aug 6, 20265 · $2.2M
Brown David AdirectorAug 2025Jul 9, 2026none
Alnakib Abdulwahab AdirectorJun 2026Jun 18, 2026none
Al-Bahar Talal JassimdirectorAug 2025Jun 17, 2026none
Beckelman JohndirectorAug 2025Jun 17, 2026none
Becker LeedirectorAug 2025Jun 17, 2026none
Lozier Kenneth W.directorAug 2025Jun 17, 2026none
Massad Mark I.directorAug 2025Jun 17, 2026none
Moore LisadirectorAug 2025Jun 17, 2026none
Raymond Mark F.directorAug 2025Jun 17, 2026none
Sites EricdirectorApr 2026Jun 17, 2026none
Sommers Jill E.directorMar 2026Jun 17, 2026none
Stahlin PauldirectorAug 2025Jun 17, 2026none
Stahl MurraydirectorAug 2025Mar 6, 20261 · $2.2M
Nazarali JamildirectorAug 2025Aug 15, 2025none
Owners of more than 10% of a classsales are open-market, Nov 9, 2025 to Nov 9, 2026
NameRoleFirst filingLatest filingSales, 12 months
Horizon Kinetics Asset Management LLC10% ownerAug 2025May 21, 20261 · $5.0M

A person is listed as reporting now after a filing in the last fifteen months. The record shows when someone last filed; it does not say why they stopped. Each name links to the filings on sec.gov.

SI Assistanton MIAX · research, not advice