Miami International Holdings, INC Form 4 insider transactions

A director and 10% owner of Miami International Holdings, Inc. reported an acquisition of common stock and existing derivative holdings.

Murray Stahl, a director of Miami International Holdings, Inc., filed an amended Form 4 to correct previously reported beneficial ownership of common stock and detail his derivative holdings.

An amended SEC Form 4 filing by Murray Stahl and Horizon Kinetics Asset Management LLC corrects previous share totals and details the cashless exercise of warrants for Miami International Holdings common stock.

Miami International Holdings Director Murray Stahl reported an indirect purchase of 7,200 common shares and disclosed existing direct ownership of vested stock options.

A director and 10% owner of Miami International Holdings, Inc. increased their indirect beneficial ownership of common stock through cashless warrant exercises.

Miami International Holdings' EVP and CIO, Douglas M. Schafer Jr., reported a disposition of 108,550 common shares to cover tax obligations related to restricted stock awards.

MIAMI INTERNATIONAL HOLDINGS, INC. CEO Thomas P. Gallagher surrendered 50,100 shares of common stock to satisfy tax obligations related to restricted stock awards.

Miami International Holdings, Inc. Chairman and CEO Thomas P. Gallagher reported a gift of 2,000 common stock shares to his son, subject to a prior lock-up agreement.

Shelly Brown, EVP and Chief Strategy Officer of Miami International Holdings, Inc., exercised incentive stock options to acquire 33,332 shares of common stock.

Miami International Holdings' EVP and CFO, Lance Emmons, exercised a substantial number of incentive stock options, increasing his direct common stock holdings.

Miami International Holdings, Inc. Director Murray Stahl reported an acquisition of common stock and detailed his beneficial ownership, including derivative securities.

A director of Miami International Holdings, Inc. reported a minor acquisition of common stock and disclosed extensive derivative holdings through an affiliated entity.

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.