SEC Filing Summary for Miami International Holdings, Inc.

This filing details stock options held by Eric Sites, a newly elected Director of Miami International Holdings, Inc. since April 24, 2026. The options are for the underlying security of Miami International Holdings Inc. and are exercisable on various dates with different exercise prices. All options are fully vested. On April 28, 2026, Horizon Kinetics Asset Management LLC (HKAM) amended its Schedule 13D, reporting beneficial ownership of 11,162,809 shares. Mr. Sites does not exercise investment discretion for HKAM regarding these securities.