MIAX EVP Barbara Comly Exercises Options, Sells 28,000 Shares

What Happened

• Barbara J. Comly, Executive Vice President, General Counsel & Corporate Secretary of Miami International Holdings, exercised 28,000 stock options at an exercise price of $12.00 per share (total cost $336,000) and sold 28,000 shares in an open-market sale the same day for a weighted-average price of $41.22 per share (gross proceeds $1,154,160).
• The filing also reports a separate derivative disposition line for 28,000 shares at $0.00; the filing does not provide further detail on that line. This sequence (exercise followed by same-day sale) is commonly described as a cashless exercise/sale.

Key Details

• Transaction date: July 2, 2026 (filed with the SEC on July 7, 2026).
• Exercise: 28,000 shares at $12.00 each (total $336,000).
• Sale: 28,000 shares at a weighted-average price of $41.22 (range $39.79–$41.79) — gross proceeds $1,154,160. (Sales executed in multiple trades; weighted average shown.)
• Options status: Fully vested (per filing footnote).
• Plan/authorization: Sale was effected pursuant to a Rule 10b5-1 trading plan adopted December 18, 2025.
• Shares owned after transaction: Not specified in the provided filing.
• Filing timeliness: Transaction dated July 2; filing date July 7. The filing does not indicate a late-report designation.

Context

• For retail investors: this was an exercise of vested options immediately followed by an open-market sale under a pre-established 10b5-1 plan. Such transactions are routine for converting option value to cash and do not, by themselves, indicate management’s forward-looking view of the company.
• The filing’s footnotes clarify the sales price range and 10b5-1 plan; investors can request the exact trade-by-trade breakdown from the SEC staff or the issuer if desired.