Gallagher Thomas P. (CIK 2080477) reported 36 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-04). Recent activity: Buy MIAX (47,000 shares), Sell MIAX (47,000 shares), Buy MIAX (16,666 shares), Buy MIAX (8,333 shares), Buy MIAX (13,140 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-04 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 47,000 | $564,000 |
| 2026-09-04 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 47,000 | $2.0M |
| 2026-09-04 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 16,666 | $199,992 |
| 2026-09-04 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 8,333 | $99,996 |
| 2026-09-04 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 13,140 | $199,991 |
| 2026-09-04 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 4,464 | $99,994 |
| 2026-08-20 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 150,300 | $6.4M |
| 2026-08-20 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 149,700 | $6.2M |
| 2026-08-06 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 48,334 | $580,008 |
| 2026-08-06 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 48,334 | $2.2M |
| 2026-07-14 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 70,000 | $840,000 |
| 2026-07-14 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 70,000 | $3.0M |
| 2026-07-07 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 41,772 | $501,264 |
| 2026-07-07 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 41,772 | $1.8M |
| 2026-07-07 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 28,228 | $338,736 |
| 2026-07-07 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 28,228 | $1.2M |
| 2026-06-18 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 232,977 | $0 |
| 2026-06-04 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 70,000 | $840,000 |
| 2026-06-04 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 70,000 | $3.0M |
| 2026-05-13 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 24,999 | $299,988 |
| 2026-05-07 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 15,771 | $189,252 |
| 2026-05-07 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 15,771 | $755,746 |
| 2026-05-05 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 54,229 | $650,748 |
| 2026-05-05 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Sell | 54,229 | $2.6M |
| 2026-04-17 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO | Buy | 70,001 | $840,012 |
来源：SEC Form 4 申报文件 · 截至 2026-09-04