MIAX EVP Barbara Comly Exercises Options and Sells 44,445 Shares

What Happened Barbara J. Comly, EVP, General Counsel & Corporate Secretary of Miami International Holdings (MIAX), exercised 44,445 stock options on 2026-09-02 at $12.00 per share (total cost $533,340) and sold 44,445 shares in the open market the same day at a weighted average price of $40.49 for gross proceeds of approximately $1,799,578. The filing also shows the routine derivative-disposition reporting entry associated with the option exercise.

Key Details

• Transaction date: 2026-09-02; Form 4 filed 2026-09-04 (timely).
• Option exercise: 44,445 shares acquired at $12.00 each = $533,340. Options are fully vested (F3).
• Open-market sale: 44,445 shares sold at a weighted average $40.49 = $1,799,578. Trades executed across $39.66–$41.80 (F2).
• Sale was effected under a previously established Rule 10b5-1 trading plan adopted 12/18/2025 (F1).
• A derivative disposition line at $0 is reported (routine reporting of the option instrument); post-transaction total shares owned is not included in the provided excerpt.

Context This was an exercise-plus-immediate-sale (effectively a cashless exercise and sale) executed under a pre-set 10b5‑1 plan. Such transactions are commonly used to monetize vested options and are typically considered routine; they do not, by themselves, indicate the insider’s forward view on the company.