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 |
|---|---|---|---|---|---|---|
| 2026-10-22 | Schafer Douglas M. JR EVP and CIO | Sale 10b5-1 | −8,000 | $35.06 | $280K | 387,414 |
| 2026-10-22 | Schafer Douglas M. JR EVP and CIO | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −8,000 | 147,334 | ||
| 2026-10-02 | Schafer Douglas M. JR EVP and CIO | Option exercise 10b5-1 | +40,000 | $12.00 | $480K | 427,414 |
| 2026-10-02 | Schafer Douglas M. JR EVP and CIO | Sale 10b5-1 | −40,000 | $33.34 | $1.3M | 387,414 |
| 2026-10-02 | Schafer Douglas M. JR EVP and CIO | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −40,000 | 155,334 | ||
| 2026-09-25 | Jayabalan Harish EVP, CISO and CRO | Option exercise | +8,333 | $12.00 | $100K | 86,398 |
| 2026-09-25 | Jayabalan Harish EVP, CISO and CRO | Option exercise · Incentive Stock Option (Right to Buy) | −8,333 | 8,333 | ||
| 2026-09-16 | Brown Shelly EVP, Chief Strategy Officer | Sale 10b5-1 | −21,217 | $38.61 | $819K | 316,490 |
| 2026-09-11 | Brown Shelly EVP, Chief Strategy Officer | Shares withheld for taxes | −16,283 | $42.54 | $693K | 337,707 |
| 2026-09-03 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Option exercise 10b5-1 | +11,000 | $12.00 | $132K | 130,601 |
| 2026-09-03 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Sale 10b5-1 | −11,000 | $42.21 | $464K | 119,601 |
| 2026-09-03 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −11,000 | 66,000 | ||
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise 10b5-1 | +47,000 | $12.00 | $564K | 1,470,275 |
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Sale 10b5-1 | −47,000 | $42.43 | $2.0M | 1,423,275 |
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise 10b5-1 | +16,666 | $12.00 | $200K | 760,605 |
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise 10b5-1 | +8,333 | $12.00 | $100K | 768,938 |
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise 10b5-1 | +13,140 | $15.22 | $200K | 782,078 |
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise 10b5-1 | +4,464 | $22.40 | $100K | 786,542 |
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise · Nonqualified Stock Option (Right to Buy) 10b5-1 | −47,000 | 188,000 | ||
| 2026-09-03 | Gallagher Thomas P. Chairman & CEO | Option exercise · Incentive Stock Option (Right to Buy) 10b5-1 | −16,666 | 0 |
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