Form 4: Insider Transaction: Edward Deitzel Exercises MIAX Options

Edward Deitzel, EVP at Miami International Holdings, exercised 11,000 stock options and sold the resulting shares.

Summary

• Edward Deitzel, EVP, CRO, and CCO of Miami International Holdings, Inc. (MIAX), exercised 11,000 nonqualified stock options at a strike price of $12.00 per share.
• Following the exercise, the reporting person sold the 11,000 shares at a weighted average price of $42.16 per share.
• The transactions were executed on June 2, 2026, pursuant to a Rule 10b5-1 trading plan adopted on December 30, 2025.
• The reporting person retains beneficial ownership of 116,221 shares of common stock following these transactions.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event; it is a routine, pre-planned insider transaction that does not signal a change in company fundamentals.

Positives

• The transaction was pre-planned under a Rule 10b5-1 plan, indicating the sale was not based on immediate non-public information.
• The exercise of options demonstrates continued long-term alignment with the company through the retention of 116,221 shares.

Negatives

• The reporting person reduced their direct holdings by 11,000 shares through the sale.

Risks

• Market price volatility could impact the value of remaining holdings.
• Reliance on Rule 10b5-1 plans does not eliminate the risk of negative market perception regarding insider selling.

Future Outlook

No specific forward-looking guidance regarding company performance was provided in this filing.

Management Comments

• The reporting person confirmed the transaction was executed in multiple trades at prices ranging from $42.00 to $45.28.

Industry Context

StockSavvy.ai notes that routine insider selling via 10b5-1 plans is standard practice for executives at financial exchanges and technology firms to manage personal liquidity and diversify portfolios.

Comparison to Industry Standards

• The use of Rule 10b5-1 plans is a standard governance practice among C-suite executives at major financial institutions like ICE or CBOE to avoid allegations of insider trading.
• The exercise and sale of vested options is a common compensation-related event for senior management.

Stakeholder Impact

• Minimal impact on shareholders as the transaction was pre-planned and represents a small portion of the executive's total holdings.

Next Steps

• No future actions or milestones were disclosed in this filing.

Key Dates

Keywords

MIAX, Miami International Holdings, Insider Trading, Form 4, Stock Options, Rule 10b5-1