Miami International Holdings, INC Form 4 insider transactions

Miami International Holdings CEO Thomas Gallagher exercised 70,000 stock options and sold the resulting shares via a 10b5-1 plan.

Horizon Kinetics Asset Management LLC reported a reduction in its beneficial ownership of Miami International Holdings, Inc. common stock following an in-kind distribution.

Judson Gray Teekell, a Director at Miami International Holdings, Inc., acquired 22,667 shares of common stock through the exercise of stock options.

Miami International Holdings, Inc. EVP and CFO Lance Emmons sold 35,000 shares of common stock for an average price of $56.36 per share, executed under a pre-arranged Rule 10b5-1 trading plan.

Thomas P. Gallagher, Chairman & CEO of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX), reported the acquisition of 24,999 shares of common stock on May 11, 2026, through the exercise of an incentive stock option.

Thomas P. Gallagher, Chairman & CEO of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX), reported the sale of 15,771 shares of common stock under a pre-arranged Rule 10b5-1 trading plan.

Thomas P. Gallagher, Chairman & CEO of Miami International Holdings, Inc. (MIAX), executed a Rule 10b5-1 plan, acquiring 54,229 shares at $12 and disposing of an equal number at $47.26.

MIAX Exchanges EVP, CRO, CCO Edward Deitzel sold 11,000 shares of common stock for $12 per share, and exercised options to acquire 11,000 shares at $12, subsequently selling them at a weighted average of $47.28.

Shelly Brown, EVP, Chief Strategy Officer of Miami International Holdings, Inc. (MIAX), reported the sale of 16,000 shares of common stock for $47.28 per share, executed under a Rule 10b5-1 trading plan.

Judson Gray Teekell, a Director at Miami International Holdings, Inc. (MIAX), reported the sale of 3,000 common shares under a pre-established Rule 10b5-1 trading plan.

Douglas M. Schafer Jr., EVP and CIO of Miami International Holdings, Inc., executed a Rule 10b5-1 plan transaction, selling 48,000 shares of common stock.

MIAX International Holdings, Inc. Director Kurt M. Eckert reported a sale of 5,625 shares of common stock, executed under a pre-arranged 10b5-1 trading plan.

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.