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 |
|---|---|---|---|---|---|---|
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise · Incentive Stock Option (Right to Buy) 10b5-1 | −8,333 | 0 | ||
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise · Incentive Stock Option (Right to Buy) 10b5-1 | −13,140 | 0 | ||
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise · Incentive Stock Option (Right to Buy) 10b5-1 | −4,464 | 8,928 | ||
| 2026-09-02 | Comly Barbara J. EVP, GC & Corporate Secretary | Option exercise 10b5-1 | +44,445 | $12.00 | $533K | 884,009 |
| 2026-09-02 | Comly Barbara J. EVP, GC & Corporate Secretary | Sale 10b5-1 | −44,445 | $40.49 | $1.8M | 839,564 |
| 2026-09-02 | Comly Barbara J. EVP, GC & Corporate Secretary | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −44,445 | 44,444 | ||
| 2026-09-02 | Schafer Douglas M. JR EVP and CIO | Option exercise 10b5-1 | +43,334 | $12.00 | $520K | 430,748 |
| 2026-09-02 | Schafer Douglas M. JR EVP and CIO | Option exercise 10b5-1 | +4,666 | $12.00 | $56K | 435,414 |
| 2026-09-02 | Schafer Douglas M. JR EVP and CIO | Sale 10b5-1 | −48,000 | $40.48 | $1.9M | 387,414 |
| 2026-09-02 | Schafer Douglas M. JR EVP and CIO | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −43,334 | 0 | ||
| 2026-09-02 | Schafer Douglas M. JR EVP and CIO | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −4,666 | 195,334 | ||
| 2026-09-02 | Teekell Judson Gray Director | Sale 10b5-1 | −5,545 | $41.58 | $231K | 81,000 |
| 2026-09-02 | Teekell Judson Gray Director | Sale 10b5-1 | −3,000 | $40.89 | $123K | 69,251 |
| 2026-08-19 | Gallagher Thomas P. Chairman & CEO | Sale 10b5-1 | −149,700 | $41.13 | $6.2M | 1,423,275 |
| 2026-08-18 | Comly Barbara J. EVP, GC & Corporate Secretary | Shares withheld for taxes | −43,420 | $42.41 | $1.8M | 839,564 |
| 2026-08-18 | Gallagher Thomas P. Chairman & CEO | Shares withheld for taxes 10b5-1 | −150,300 | $42.41 | $6.4M | 1,572,975 |
| 2026-08-17 | Schwarzkopf Cynthia Director | Option exercise 10b5-1 | +5,000 | $12.00 | $60K | 93,545 |
| 2026-08-17 | Schwarzkopf Cynthia Director | Sale 10b5-1 | −5,000 | $42.85 | $214K | 88,545 |
| 2026-08-17 | Schwarzkopf Cynthia Director | Option exercise · Stock Option (Right to Buy) 10b5-1 | −5,000 | 11,916 | ||
| 2026-08-17 | Emmons Lance EVP and CFO | Sale 10b5-1 | −35,000 | $42.83 | $1.5M | 86,538 |
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