Miami International Holdings, INC Form 4 insider transactions

Murray Stahl, a director of Miami International Holdings, Inc., acquired additional common stock and holds significant derivative securities, primarily through Horizon Kinetics Asset Management LLC.

Murray Stahl, a director and 10% owner, reported an acquisition of 34,470 shares of Miami International Holdings common stock.

John Smollen, EVP of Traded Products & Relation at Miami International Holdings, Inc., exercised stock options and settled tax obligations.

Edward Deitzel, EVP, CRO, and CCO of MIAX Exchanges, exercised stock options and adjusted his direct holdings in Miami International Holdings, Inc. common stock.

MIAMI INTERNATIONAL HOLDINGS EVP, CISO, and CRO Harish Jayabalan exercised stock options and increased beneficial ownership of common stock.

A Miami International Holdings executive surrendered 16,283 shares of common stock to cover tax withholding obligations related to restricted stock awards.

A Miami International Holdings executive disposed of 11,047 shares of common stock to cover tax obligations related to restricted stock awards.

Miami International Holdings CEO Thomas P. Gallagher reported a disposition of 192,220 shares for tax withholding purposes related to restricted stock awards.

MIAMI International Holdings Director David A. Brown exercised 53,056 stock options at $16.14 per share, converting them to common stock.

Edward Deitzel, EVP, CRO, and CCO of MIAX Exchanges, converted preferred and nonvoting common stock and holds various vested stock options for Miami International Holdings, Inc.

Miami International Holdings Director Kurt M. Eckert converted nonvoting shares and exercised stock options, increasing his common stock holdings.

MIAMI INTERNATIONAL HOLDINGS, INC. Director Raymond F. converted preferred and nonvoting common stock, along with associated options, into common stock holdings.

MIAMI INTERNATIONAL HOLDINGS, INC. Director Paul Stahlin increased his beneficial ownership of common stock through conversions and option exercises.

MIAMI INTERNATIONAL HOLDINGS, INC. EVP and CIO Douglas M. Schafer Jr. converted preferred and nonvoting shares and exercised stock options, increasing his direct common stock beneficial ownership to 537,796 shares.

John Smollen, EVP at Miami International Holdings, Inc., converted preferred and nonvoting stock and exercised a substantial number of options into common stock.

Talal Jassim Al-Bahar, a director and 10% owner of Miami International Holdings, Inc., converted 238,462 nonvoting common shares into common stock.

MIAMI International Holdings Director John Beckelman exercised 8,667 stock options at $12 per share, acquiring common stock.

Shelly Brown, EVP of Strategic Planning & Business Development at MIAMI INTERNATIONAL HOLDINGS, INC., converted preferred and nonvoting common stock and exercised stock options on August 15, 2025, increasing direct common stock ownership to 339,029 shares.

A Miami International Holdings, Inc. executive converted preferred and nonvoting common stock to common stock and exercised various stock options.

A Miami International Holdings executive converted preferred and nonvoting common stock, along with various stock options, into common stock following the company's IPO.

MIAMI INTERNATIONAL HOLDINGS, INC. CEO Thomas P. Gallagher reported significant conversions of preferred and nonvoting stock into common shares, alongside option exercises.

Judson Gray Teekell, a director at Miami International Holdings, Inc., reported conversions of preferred and nonvoting common stock and the exercise of various stock options into common stock.

A director at Miami International Holdings, Inc. converted preferred and nonvoting common stock to common shares and exercised multiple stock options.

MIAMI INTERNATIONAL HOLDINGS, INC. EVP and CFO Lance Emmons converted preferred shares and purchased common stock, while holding significant vested options following the company's IPO.

Miami International Holdings, Inc. Director Lisa Moore reported a future acquisition of 5,500 common shares at $23 each, executed under a Rule 10b5-1 trading plan.

A Miami International Holdings, Inc. executive has filed a Form 4 indicating a pre-planned purchase of 2,500 shares of common stock in August 2025.

MIAX Director Paul Stahlin reported a direct purchase of 1,000 common shares at $23, effective August 13, 2025, signaling insider confidence.

A director of Miami International Holdings, Inc. purchased 2,500 shares of common stock for $23 per share.

MIAX's EVP and CIO, Douglas M. Schafer Jr., had 21,710 shares withheld for tax obligations related to restricted stock awards, not a sale.

A Miami International Holdings executive surrendered shares to cover tax obligations related to restricted stock awards.