Gallagher Thomas P.
Chairman & CEO
Gallagher Thomas P. has filed 14 SEC Form 4 filings (31 transaction rows) across 1 company, with disclosures dating back to 2025. 14 of those filings fall inside the rolling window. Most recent filing: Sep 4, 2026.
On the most recent filing, Gallagher Thomas P. is listed as Chairman & CEO at MIAMI INTERNATIONAL HOLDINGS, INC. Inside the rolling window, Gallagher Thomas P. reported no open-market purchases and 10 open-market sales totaling $32.3M in MIAX. The largest disclosed transaction in the window is a sale of 224,025 MIAX shares on Apr 15, 2026, worth $9.7M.
Companies traded
Other insiders at MIAX
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$32.3M
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| MIAX | Chairman & CEO | Sale | 47,000 | $2.0M | Sep 4 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 149,700 | $6.2M | Aug 20 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 48,334 | $2.2M | Aug 6 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 70,000 | $3.0M | Jul 14 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 41,772 | $1.8M | Jul 7 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 28,228 | $1.2M | Jul 7 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 70,000 | $3.0M | Jun 4 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 15,771 | $756K | May 7 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 54,229 | $2.6M | May 5 | SEC ↗ | |
| MIAX | Chairman & CEO | Sale | 224,025 | $9.7M | Apr 17 | SEC ↗ |
Frequently asked questions
How many SEC Form 4 filings has Gallagher Thomas P. made?
Gallagher Thomas P. has filed 14 SEC Form 4 filings (31 transaction rows) across 1 company since 2025.
Which companies does Gallagher Thomas P. trade?
Gallagher Thomas P. has filed SEC Form 4 disclosures for 1 company, including MIAX.
When was Gallagher Thomas P.'s most recent SEC Form 4 filing?
Gallagher Thomas P.'s most recent SEC Form 4 filing on Tracefour is dated Sep 4, 2026.
What is Gallagher Thomas P.'s job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Gallagher Thomas P. is listed as Chairman & CEO.
What is Gallagher Thomas P.'s total buy and sell value in the current window?
Inside the rolling retention window, Gallagher Thomas P. bought $0 and sold $32.3M based on SEC Form 4 filings.
What was Gallagher Thomas P.'s largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 224,025 MIAX shares on 2026-04-15, worth $9.7M, per SEC Form 4 filings.