Gallagher Thomas P.
SEC CIK 2080477 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | COB, CEO, Dir | 1.47M | $276.0K | $32.30M | 29 | 2025-08-13 | 2026-09-03 |
Most active insiders at MIAX, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Gallagher Thomas P. | COB, CEO, Dir | — | $32.30M |
| 2 | Schafer Douglas M. JR | EVP, CIO | — | $12.35M |
| 3 | Comly Barbara J. | EVP, GC, Corp. Sec | — | $9.98M |
| 4 | HORIZON KINETICS ASSET MANAGEMENT LLC | — | $312.4K | $4.95M |
| 5 | Brown Shelly | EVP, Chief Strategy Off | — | $5.11M |
| 6 | Emmons Lance | EVP, CFO | — | $3.47M |
| 7 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | — | $2.93M |
| 8 | STAHL MURRAY | Dir, 10% | $722.7K | $2.19M |
| 9 | Jayabalan Harish | EVP, CRO, CISO | — | $2.56M |
| 10 | Eckert Kurt M. | Dir | — | $2.22M |
Transactions 29
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DTI | 2026-09-04 16:35 | 2026-09-03 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +47.0K | 1.47M | +3% | +$564.0K |
| DTI | 2026-09-04 16:35 | 2026-09-03 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $42.43 | -47.0K | 1.42M | -3% | -$1.99M |
| DMT | 2026-09-04 16:35 | 2026-09-03 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $14.08 | +42.6K | 786.5K | +6% | +$600.0K |
| TI | 2026-08-20 16:12 | 2026-08-18 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | F - Tax | $42.41 | -150.3K | 1.57M | -9% | -$6.37M |
| TI | 2026-08-20 16:12 | 2026-08-19 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale | $41.13 | -149.7K | 1.42M | -10% | -$6.16M |
| DTI | 2026-08-06 16:05 | 2026-08-04 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +48.3K | 1.77M | +3% | +$580.0K |
| DTI | 2026-08-06 16:05 | 2026-08-04 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $45.69 | -48.3K | 1.72M | -3% | -$2.21M |
| DTI | 2026-07-14 16:04 | 2026-07-13 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +70.0K | 1.79M | +4% | +$840.0K |
| DTI | 2026-07-14 16:04 | 2026-07-13 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $42.52 | -70.0K | 1.72M | -4% | -$2.98M |
| DMTI | 2026-07-07 17:03 | 2026-07-06+ | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +70.0K | 1.75M | +4% | +$840.0K |
| DMTI | 2026-07-07 17:03 | 2026-07-06+ | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $42.16 | -70.0K | 1.72M | -4% | -$2.95M |
| D | 2026-06-18 16:13 | 2026-06-16 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | A - Grant | $0.00 | +233.0K | 743.9K | +46% | $0 |
| DTI | 2026-06-04 16:37 | 2026-06-02 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +70.0K | 1.79M | +4% | +$840.0K |
| DTI | 2026-06-04 16:37 | 2026-06-02 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $42.36 | -70.0K | 1.72M | -4% | -$2.97M |
| D | 2026-05-13 16:26 | 2026-05-11 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +25.0K | 511.0K | +5% | +$300.0K |
| DTI | 2026-05-07 16:07 | 2026-05-05 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +15.8K | 1.74M | +0.9% | +$189.3K |
| DTI | 2026-05-07 16:07 | 2026-05-05 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $47.92 | -15.8K | 1.72M | -0.9% | -$755.7K |
| DTI | 2026-05-05 08:17 | 2026-05-04 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +54.2K | 1.78M | +3% | +$650.7K |
| DTI | 2026-05-05 08:17 | 2026-05-04 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $47.26 | -54.2K | 1.72M | -3% | -$2.56M |
| DTI | 2026-04-17 16:17 | 2026-04-15 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | M - OptEx | $12.00 | +70.0K | 1.90M | +4% | +$840.0K |
| DMTI | 2026-04-17 16:17 | 2026-04-15 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $43.36 | -174.1K | 1.72M | -9% | -$7.55M |
| DT | 2026-04-17 16:17 | 2026-04-15 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | S - Sale+OE | $43.68 | -49.9K | 486.0K | -9% | -$2.18M |
| I | 2026-04-01 16:42 | 2026-03-30 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | F - Tax | $37.50 | -20.9K | 1.83M | -1% | -$782.8K |
| 2026-02-12 | 2026-02-10 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | F - Tax | $41.33 | -50.1K | 535.9K | -9% | -$2.07M | |
| 2025-12-29 | 2025-12-23 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | G - Gift | — | -2,000 | 586.0K | -0.3% | — | |
| I | 2025-08-28 | 2025-08-26 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | F - Tax | $33.90 | -192.2K | 1.85M | -9% | -$6.52M |
| DMI | 2025-08-19 | 2025-08-15 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | C - Cnv Deriv | — | +135.9K | 2.04M | +7% | — |
| D | 2025-08-19 | 2025-08-15 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | C - Cnv Deriv | — | +574.0K | 586.0K | +4,783% | — |
| 2025-08-15 | 2025-08-13 | MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | Gallagher Thomas P. | COB, CEO, Dir | P - Purchase | $23.00 | +12.0K | 12.0K | New | +$276.0K |
Purchase Sale Sale after option exercise All abbreviations