CIK 0001438472 · Non-accelerated filer
MIAMI INTERNATIONAL HOLDINGS, INC.
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- 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 |
|---|---|---|---|---|---|---|
| 2026-06-02 | Teekell Judson Gray Director | Sale 10b5-1 | −3,000 | $42.78 | $128K | 71,014 |
| 2026-05-19 | HORIZON KINETICS ASSET MANAGEMENT LLC 10% owner | Other disposition | −2,455,744 | 2,170,898 | ||
| 2026-05-19 | Teekell Judson Gray Director | Option exercise | +22,667 | $12.00 | $272K | 79,005 |
| 2026-05-19 | Teekell Judson Gray Director | Shares withheld for taxes | −4,991 | $54.51 | $272K | 74,014 |
| 2026-05-19 | Teekell Judson Gray Director | Option exercise · Stock Option (Right to Buy) | −22,667 | 0 | ||
| 2026-05-15 | Emmons Lance EVP and CFO | Sale 10b5-1 | −35,000 | $56.36 | $2.0M | 84,262 |
| 2026-05-11 | Gallagher Thomas P. Chairman & CEO | Option exercise | +24,999 | $12.00 | $300K | 510,962 |
| 2026-05-11 | Gallagher Thomas P. Chairman & CEO | Option exercise · Incentive Stock Option (Right to Buy) | −24,999 | 0 | ||
| 2026-05-05 | Gallagher Thomas P. Chairman & CEO | Option exercise 10b5-1 | +15,771 | $12.00 | $189K | 1,739,046 |
| 2026-05-05 | Gallagher Thomas P. Chairman & CEO | Sale 10b5-1 | −15,771 | $47.92 | $756K | 1,723,275 |
| 2026-05-05 | Gallagher Thomas P. Chairman & CEO | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −15,771 | 210,000 | ||
| 2026-05-04 | Comly Barbara J. EVP, GC & Corporate Secretary | Option exercise 10b5-1 | +28,000 | $12.00 | $336K | 871,844 |
| 2026-05-04 | Comly Barbara J. EVP, GC & Corporate Secretary | Sale 10b5-1 | −28,000 | $47.26 | $1.3M | 843,844 |
| 2026-05-04 | Comly Barbara J. EVP, GC & Corporate Secretary | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −28,000 | 84,000 | ||
| 2026-05-04 | Eckert Kurt M. Director | Option exercise 10b5-1 | +5,625 | $12.00 | $68K | 148,000 |
| 2026-05-04 | Eckert Kurt M. Director | Sale 10b5-1 | −5,625 | $47.29 | $266K | 142,375 |
| 2026-05-04 | Eckert Kurt M. Director | Option exercise · Stock Option (Right to Buy) 10b5-1 | −5,625 | 11,563 | ||
| 2026-05-04 | Brown Shelly EVP, Chief Strategy Officer | Option exercise 10b5-1 | +16,000 | $12.00 | $192K | 341,047 |
| 2026-05-04 | Brown Shelly EVP, Chief Strategy Officer | Sale 10b5-1 | −16,000 | $47.28 | $756K | 325,047 |
| 2026-05-04 | Brown Shelly EVP, Chief Strategy Officer | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −16,000 | 32,000 |
Page 12 of 15 · 296 trades