CIK 0001438472 · Non-accelerated filer
MIAMI INTERNATIONAL HOLDINGS, INC.
Sign in to watch- Ticker
- MIAX
- Exchange
- NYSE
- Industry
- Security Brokers, Dealers & Flotation Companies
- Incorporated
- DE
- Entity type
- operating
- EIN
- 261482385
- Phone
- 609-897-7300
- Business address
- 7 ROSZEL ROAD, FIFTH FLOOR, SUITE 1-A, PRINCETON, NJ, 08540
- Former names
- MIAMI INTERNATIONAL HOLDINGS INC
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $21,715,991
- in 14 filings, $21.7M under 10b5-1 plans
Net −$21,715,991. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
- Gallagher Thomas P. −$8.2M Chairman & CEO sold 12% of stake
- Schafer Douglas M. JR −$5.2M EVP and CIO sold 27% of stake
- Comly Barbara J. −$5.0M EVP, GC & Corporate Secretary sold 14% of stake
- Emmons Lance −$1.5M EVP and CFO sold 29% of stake
- Brown Shelly −$819K EVP, Chief Strategy Officer sold 6% of stake
Reading 55 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-04-08 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Option exercise 10b5-1 | +7,572 | $12.00 | $91K | 123,793 |
| 2026-04-08 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Sale 10b5-1 | −7,572 | $42.02 | $318K | 116,221 |
| 2026-04-08 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −7,572 | 0 | ||
| 2026-04-08 | Brown Shelly EVP, Chief Strategy Officer | Option exercise 10b5-1 | +16,434 | $12.00 | $197K | 341,481 |
| 2026-04-08 | Brown Shelly EVP, Chief Strategy Officer | Sale 10b5-1 | −16,434 | $42.08 | $692K | 325,047 |
| 2026-04-08 | Brown Shelly EVP, Chief Strategy Officer | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −16,434 | 48,000 | ||
| 2026-04-07 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Option exercise 10b5-1 | +762 | $12.00 | $9K | 116,983 |
| 2026-04-07 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Sale 10b5-1 | −762 | $42.00 | $32K | 116,221 |
| 2026-04-07 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Option exercise 10b5-1 | +4,001 | $12.00 | $48K | 120,222 |
| 2026-04-07 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Sale 10b5-1 | −4,001 | $42.00 | $168K | 116,221 |
| 2026-04-07 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −762 | 7,572 | ||
| 2026-04-07 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −4,001 | 29,333 | ||
| 2026-04-07 | Brown Shelly EVP, Chief Strategy Officer | Option exercise 10b5-1 | +900 | $12.00 | $11K | 325,947 |
| 2026-04-07 | Brown Shelly EVP, Chief Strategy Officer | Sale 10b5-1 | −900 | $42.00 | $38K | 325,047 |
| 2026-04-07 | Brown Shelly EVP, Chief Strategy Officer | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −900 | 64,434 | ||
| 2026-04-07 | Brown Shelly EVP, Chief Strategy Officer | Sale 10b5-1 | −900 | $42.00 | $38K | 324,147 |
| 2026-04-06 | Brown Shelly EVP, Chief Strategy Officer | Sale 10b5-1 | −2,357 | $41.33 | $97K | 325,047 |
| 2026-04-06 | Brown Shelly EVP, Chief Strategy Officer | Sale 10b5-1 | −2,357 | $41.33 | $97K | 325,047 |
| 2026-04-02 | Teekell Judson Gray Director | Sale 10b5-1 | −2,700 | $40.00 | $108K | 59,338 |
| 2026-03-30 | Comly Barbara J. EVP, GC & Corporate Secretary | Shares withheld for taxes | −1,448 | $37.50 | $54K | 843,844 |
Page 14 of 15 · 296 trades