Gallagher Thomas P. 4

What Happened

• Thomas P. Gallagher, Chairman, CEO and Director of Miami International Holdings, Inc. (MIAX), had 20,875 shares surrendered to the company to satisfy tax withholding related to the net settlement of restricted stock awards. The shares are reported as disposed at $37.50 per share for a total of $782,813. This was a tax-withholding disposition, not an open-market sale.

Key Details

• Transaction date: 2026-03-30; Filing date: 2026-04-01.
• Reported disposition: 20,875 shares at $37.50 each (total $782,813).
• Nature of transaction: tax withholding on net settlement of restricted stock awards (footnote F1) — the shares were surrendered to the company and do not represent a sale by the reporting person.
• Beneficial ownership note: Gallagher maintains beneficial ownership/control via Gallagher Investments, LLC (footnote F2).
• Filing timeliness: No late filing flag indicated in the filing.

Context

• This is a routine tax-withholding action associated with restricted stock settlement. Such surrender/disposition transactions are administrative and do not necessarily signal the insider’s view on the company’s stock. Purchases or open-market sales are generally more informative about insider sentiment.