MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) has 46 SEC Form 4 filings (88 transaction rows) in the rolling window, disclosed by 9 distinct insiders. Most recent filing: Jul 16, 2026.
The most active filer is Chairman & CEO Gallagher Thomas P. with 4 filings. Insiders have net sold $21.2M over the trailing 6 months.
- Industry:Financial - Capital Markets
- CEO:Thomas Gallagher
- Employees:433
- HQ:Princeton, NJ, US
- IPO:2025-08-14
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$21.2M
reported sales (SEC code S)
Unique Insiders
9
in the rolling window
Market Cap
$4.0B
latest known value
| Source | ||||||
|---|---|---|---|---|---|---|
Schwarzkopf CynthiaFirst filing | Director | Sale | 5,000 | $210K | Jul 16 | SEC ↗ |
| EVP, GC & Corporate Secretary | Sale | 28,000 | $1.2M | Jul 14 | SEC ↗ | |
| Chairman & CEO | Sale | 70,000 | $3.0M | Jul 14 | SEC ↗ | |
Jayabalan HarishFirst filing | EVP, CISO and CRO | Sale | 20,000 | $842K | Jul 7 | SEC ↗ |
| Chairman & CEO | Sale | 41,772 | $1.8M | Jul 7 | SEC ↗ | |
| Chairman & CEO | Sale | 28,228 | $1.2M | Jul 7 | SEC ↗ | |
| EVP and CIO | Sale | 48,000 | $2.0M | Jul 7 | SEC ↗ | |
| EVP, CRO, CCO MIAX Exchanges | Sale | 11,000 | $462K | Jul 7 | SEC ↗ | |
| EVP, Chief Strategy Officer | Sale | 16,000 | $674K | Jul 7 | SEC ↗ | |
| EVP, GC & Corporate Secretary | Sale | 28,000 | $1.2M | Jul 7 | SEC ↗ | |
| Director | Sale | 5,250 | $207K | Jul 7 | SEC ↗ | |
| Director | Sale | 3,000 | $120K | Jul 7 | SEC ↗ | |
| EVP, Chief Strategy Officer | Sale | 4,714 | $209K | Jun 17 | SEC ↗ | |
| Director | Sale | 3,000 | $128K | Jun 4 | SEC ↗ | |
| Director | Sale | 5,250 | $224K | Jun 4 | SEC ↗ | |
Gallagher Thomas P.First filing | Chairman & CEO | Sale | 54,229 | $2.6M | May 5 | SEC ↗ |
Deitzel EdwardFirst filing | EVP, CRO, CCO MIAX Exchanges | Sale | 11,000 | $520K | May 5 | SEC ↗ |
Brown ShellyFirst filing | EVP, Chief Strategy Officer | Sale | 16,000 | $756K | May 5 | SEC ↗ |
Teekell Judson GrayFirst filing | Director | Sale | 3,000 | $142K | May 5 | SEC ↗ |
Schafer Douglas M. JRFirst filing | EVP and CIO | Sale | 48,000 | $2.3M | May 5 | SEC ↗ |
Eckert Kurt M.First filing | Director | Sale | 5,625 | $266K | May 5 | SEC ↗ |
Comly Barbara J.First filing | EVP, GC & Corporate Secretary | Sale | 28,000 | $1.3M | May 5 | SEC ↗ |
Related companies
MIAMI INTERNATIONAL HOLDINGS, INC. is in the Finance & Insurance sector.