• Miami International Holdings Chairman and CEO Thomas P. Gallagher reported a sale of 48,334 shares at USD 45.69 on Aug. 4.
• The transaction was reported as indirect ownership through Gallagher Investments, LLC.
• Holdings fell to 1,723,275 shares following the sale.
• The filing also showed the exercise of 48,334 stock options at USD 12 on Aug. 4.
• Indirect holdings rose to 1,771,609 shares following the option exercise.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Miami International Holdings Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0002080477-26-000014), on August 06, 2026, and is solely responsible for the information contained therein.