Deitzel Edward 4

What Happened

• Edward Deitzel, EVP / CRO / CCO of Miami International Holdings, exercised 11,000 stock options at a $12.00 strike (cost $132,000) and then sold 11,000 common shares in the open market for a weighted average price of $42.16, generating approximately $463,760 in gross proceeds. The filing also shows the related derivative (the option) being converted/removed (reported at $0), reflecting the exercise/conversion of the options.

Key Details

• Transaction date: June 2, 2026; Form 4 filed June 4, 2026 (appears timely — within the typical two-business-day window).
• Exercise: 11,000 options exercised @ $12.00 = $132,000 (acquired).
• Sale: 11,000 shares disposed in open market @ weighted avg $42.16 = $463,760.
• Sale execution: multiple trades during the day at prices ranging $42.00–$45.28; weighted average reported per footnote.
• Footnotes: sale was made pursuant to a pre-established Rule 10b5-1 trading plan adopted Dec 30, 2025; options are fully vested.
• Shares owned after the transactions: not disclosed in the filing.

Context

• This is an exercise of vested options followed by an immediate open-market sale of the resulting shares — a common pattern often used to cover exercise costs, taxes, or to diversify. Because the sale was executed under a 10b5-1 plan, it was pre‑arranged and does not necessarily indicate a change in the insider’s view of the company.