Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>

Common stock purchase or sale:
Transaction Date | Reported DateTime | Company | Symbol | Insider Relationship | Shares Traded | Average Price | Total Amount | Shares Owned | Filing |
2025-08-13 Purchase | 2025-08-15 4:48 pm | MIAMI INTERNATIONAL HOLDINGS INC. | MIAX | Gallagher Thomas P. Chairman & CEO | 12,000 | $23 | $276,000 | 12,000 (Direct) | View |
Stock options: Exercise, Award, Grant, Conversion
Transaction Date | Reported DateTime | Exercisable Expiration | Company | Symnbol | Insider Relationship | Shares Traded | Conversion Price | Shares Owned | Filing |
2025-08-26 Tax Withholding | 2025-08-28 4:33 pm | N/A N/A | MIAMI INTERNATIONAL HOLDINGS INC. | MIAX | Gallagher Thomas P. Chairman & CEO | 192,220 | $33.9 | 2,436,237 (Indirect) | View |
2025-08-15 Conversion | 2025-08-19 4:06 pm | N/A N/A | MIAMI INTERNATIONAL HOLDINGS INC. | MIAX | Gallagher Thomas P. Chairman & CEO | 709,858 | $0 | 4,226,457 (Indirect) | View |
2025-08-15 Exercise | 2025-08-19 4:06 pm | N/A 2026-08-02 | MIAMI INTERNATIONAL HOLDINGS INC. | MIAX | Gallagher Thomas P. Chairman & CEO | 3,200,000 | $0 | 4,226,457 (Direct) | View |
Ownership | 2025-08-13 5:08 pm | N/A N/A | MIAMI INTERNATIONAL HOLDINGS INC. | MIAX | Gallagher Thomas P. Chairman & CEO | 0 | $0 | 4,325,707 (Indirect) | View |