MIAMI INTERNATIONAL HOLDINGS, INC.: EVP and CIO Schafer Douglas M. JR sold 40,000 shares

What happened

• Schafer Douglas M. JR, EVP and chief information officer, exercised options for 40,000 shares at $12.00 on Oct 2, 2026 (cost $480,000) and sold 40,000 shares in an open-market sale at a weighted average price of $33.34 for $1,333,600. The filing also reports a derivative disposition of 40,000 shares at $0.

Key details

• Transaction date: Oct 2, 2026. Exercise price: $12.00. Weighted average sale price: $33.34 (trades ranged $32.91 to $33.97).
• Shares: exercised 40,000; sold 40,000; derivative disposition 40,000.
• Shares owned after the transaction: not reported in the filing.
• Footnotes: F1 — transaction under a Rule 10b5-1 plan adopted Dec 16, 2025; F2 — sale executed in multiple trades, weighted average shown and reporting person will provide details on request; F3 — options are fully vested.
• Form 4 filed Oct 6, 2026 (reporting period Oct 2, 2026).

Why it may matter

• The filing shows options were exercised and the same number of shares were sold on the same day, consistent with a cashless exercise where shares are sold upon exercise.
• This was an open-market sale and not a gift.
• A filing does not show why the insider traded or why the company acted.