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, Inc. (MIAX), exercised 28,000 stock options at $12.00 per share (total exercise cost $336,000) on July 13, 2026, and sold 28,000 common shares the same day in open-market trades for aggregate proceeds of approximately $1,175,440 (weighted average sale price $41.98). The filing also records a derivative conversion entry related to the option exercise.

Key Details

• Transaction date: July 13, 2026; Form 4 filed July 14, 2026 (timely filing).
• Exercise: 28,000 options at $12.00/share — total cash paid $336,000.
• Sale: 28,000 shares sold in multiple trades at prices ranging $41.40–$43.52; weighted-average sale price $41.98; proceeds ~$1,175,440.
• Additional derivative entry: 28,000 shares reported as disposed at $0.00 (reflects option conversion bookkeeping).
• Plan/authorization: Sale effected pursuant to a previously established Rule 10b5-1 trading plan adopted Dec 18, 2025 (per footnote).
• Options status: Options were fully vested (per footnote).
• Shares owned after transaction: Not specified in the filing.

Context
This was an exercise-and-sell (cashless-style) sequence: Comly exercised vested options and immediately sold the resulting shares under a pre-established 10b5-1 plan. Sales under 10b5-1 plans are scheduled trading arrangements and are generally considered routine; they do not by themselves indicate insider sentiment.