MIAX Shelly Brown (EVP, Chief Strategy Officer) Sells 21,217 Shares

What Happened
Shelly Brown, Executive Vice President and Chief Strategy Officer of Miami International Holdings, sold 21,217 shares on September 16, 2026. The weighted-average sale price was $38.61, for total proceeds of approximately $819,188. The transactions were sales (S), not purchases.

Key Details

• Transaction date: 2026-09-16; Form filed: 2026-09-17 (timely filing).
• Price: weighted average $38.61; individual trades ranged from $37.84 to $39.56.
• Total shares sold: 21,217; total proceeds ≈ $819,188.
• Shares owned after the transaction: not disclosed in this filing.
• Footnotes: (F1) Transaction effected under a previously established Rule 10b5-1 trading plan adopted Dec 22, 2025. (F2) Executed in multiple trades during the day; the filer can provide per-trade quantities/prices on request.
• Filing timeliness: The Form 4 was filed the day after the trade and appears timely (Form 4s are generally due within two business days).

Context
The sale was completed under a prearranged Rule 10b5-1 plan, which schedules trades in advance and is commonly used by insiders to sell shares on a set cadence. This is a sale (liquidity event) and, by itself, should not be taken as a definitive signal of the insider’s view on the company.