Miami International Holdings, INC Form 4 insider transactions

Barbara J. Comly, EVP, GC & Corporate Secretary of Miami International Holdings, Inc. (MIAX), executed a Rule 10b5-1 plan transaction, selling 28,000 shares of common stock.

Miami International Holdings CEO Thomas Gallagher exercised options and sold shares via a pre-arranged 10b5-1 plan.

Barbara J. Comly, EVP and General Counsel of Miami International Holdings, exercised options and sold 29,667 shares of common stock.

Director John Beckelman acquired 8,667 shares of Miami International Holdings, Inc. (MIAX) common stock at $12 per share.

Shelly Brown, EVP, Chief Strategy Officer of Miami International Holdings, Inc. (MIAX), reported the sale of 16,434 shares of common stock under a pre-established Rule 10b5-1 trading plan.

Shelly Brown, EVP, Chief Strategy Officer of Miami International Holdings, Inc. (MIAX), reported transactions involving common stock and stock options.

Shelly Brown, EVP, Chief Strategy Officer of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX), reported a sale of 2,357 shares of common stock on April 6, 2026, and 900 shares on April 7, 2026, pursuant to a Rule 10b5-1 trading plan.

Director Judson Gray Teekell reported a transaction involving Miami International Holdings, Inc. (MIAX) common stock, executed under a Rule 10b5-1 trading plan.

An executive at Miami International Holdings, Inc. reported a routine tax-related stock disposition and corrected a previous clerical error in their beneficial ownership.

Shelly Brown, EVP and Chief Strategy Officer of Miami International Holdings, Inc., increased direct ownership by exercising stock options and settling tax obligations.

Barbara J. Comly, EVP, GC & Corporate Secretary of MIAX, surrendered 1,448 shares of common stock for tax withholding purposes related to restricted stock awards.

Edward Deitzel, EVP, CRO, and CCO of MIAX Exchanges, surrendered 707 shares of Miami International Holdings, Inc. common stock to cover tax obligations related to restricted stock awards.

Thomas P. Gallagher, Chairman & CEO of Miami International Holdings, Inc., surrendered 20,875 shares to cover tax obligations related to restricted stock awards.

Miami International Holdings' EVP and CFO, Lance Emmons, surrendered 8,350 shares to cover tax obligations from restricted stock awards.

Judson Gray Teekell, a director at Miami International Holdings, Inc., sold 300 shares of common stock for $40.00 per share on March 25, 2026, under a pre-arranged 10b5-1 plan.

Shelly Brown, EVP and Chief Strategy Officer of Miami International Holdings, Inc., sold 25,932 shares of common stock at a weighted average price of $39.33 per share.

MIAMI INTERNATIONAL HOLDINGS, INC. Director Kurt M. Eckert sold 37,917 shares of common stock after exercising options for 12,917 shares, pursuant to a Rule 10b5-1 plan.

Miami International Holdings' EVP and CIO, Douglas M. Schafer Jr., exercised stock options and subsequently sold an equal number of shares under a pre-arranged 10b5-1 plan.

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.