SEC Filing Summary

Douglas M. Schafer JR, EVP and CIO of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX), reported a series of transactions on September 2, 2026. These transactions were executed under a Rule 10b5-1 Plan. Schafer acquired 43,334 shares of Common Stock at $12 per share and an additional 4,666 shares of Common Stock at $12 per share. Concurrently, he disposed of 48,000 shares of Common Stock at a weighted average price of $40.48 per share, with prices ranging from $39.69 to $41.80. The filing also details the exercise of stock options. Options for 43,334 shares and 4,666 shares, with an exercise price of $12 each, were exercised. Following these transactions, Schafer holds 387,414 shares of Common Stock directly.