Trade Summary

3 days ago, Gallagher Thomas P., serving as Chairman & CEO at MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX), sold 149,700 shares at $41.13 per share, for a total transaction value of $6,157,161.00. Following this transaction, Gallagher Thomas P. now holds 1,423,275 shares of MIAX.

This sale represents a 9.52% decrease in Gallagher Thomas P.'s stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Wednesday, August 19, 2026 and publicly disclosed via SEC Form 4 filing on Thursday, August 20, 2026 at 4:12 PM ET, 1 day after the trade was made.

MIAMI INTERNATIONAL HOLDINGS, INC. operates in the NONE sector, specifically within the NONE industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.