Form 4: MIAX Director Exercises, Sells Shares Under 10b5-1 Plan

Cynthia Schwarzkopf, a Director and 10% Owner of Miami International Holdings, Inc., exercised stock options and sold an equal number of common shares on June 11, 2026, under a pre-arranged 10b5-1 plan.

Summary

• Cynthia Schwarzkopf, a Director and 10% Owner of Miami International Holdings, Inc. (MIAX), reported transactions on June 11, 2026.
• Exercised 19,500 stock options at an exercise price of $12 per share.
• Immediately sold 19,500 shares of common stock at a weighted average price of $41.73 per share.
• The transactions were conducted pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2026.
• Following these transactions, Schwarzkopf directly owns 81,308 shares of common stock and no derivative securities.

Sentiment

Score: 6

Explanation: StockSavvy.ai views this as a neutral to slightly positive event. While it's an insider sale, it was pre-planned under a 10b5-1 plan, which reduces the negative signal. The significant profit realized by the director from the option exercise is a positive for the individual.

Positives

• The director realized a significant profit from the option exercise, with a sale price of $41.73 per share against an exercise price of $12 per share.
• The transaction was executed under a pre-established Rule 10b5-1 plan, indicating a planned liquidity event rather than a reaction to recent non-public information.

Negatives

• A Director and 10% Owner sold a significant number of shares (19,500), which reduces their direct equity exposure to the company's future performance, although this was pre-planned.

Future Outlook

The filing does not contain specific forward-looking statements or guidance regarding the company's future performance, focusing solely on insider transactions.

Industry Context

StockSavvy.ai notes that insider transactions, particularly those executed under Rule 10b5-1 plans, are common practice for corporate executives and directors to manage their equity holdings while complying with insider trading regulations. These pre-arranged plans help mitigate concerns about opportunistic trading based on non-public information.

Comparison to Industry Standards

• StockSavvy.ai observes that the execution of stock options and subsequent sale of shares is a standard liquidity event for executives and directors across all industries, allowing them to realize value from their equity compensation.
• The use of a 10b5-1 plan aligns with best practices for corporate governance, similar to how executives at companies like Apple or Microsoft manage their vested stock awards to diversify personal portfolios.

Stakeholder Impact

• Shareholders: The sale by a director could be perceived negatively by some, but the execution under a pre-arranged 10b5-1 plan mitigates concerns about opportunistic trading. The director still retains a significant direct stake of 81,308 common shares.

Key Dates

Recommendation

The filing details a routine insider transaction (option exercise and sale) executed under a pre-arranged 10b5-1 plan. This type of transaction is common for executives managing their equity compensation and does not typically signal a change in the company's fundamental outlook. Therefore, it provides no new information to warrant a change in investment thesis, suggesting a 'hold' recommendation.

Keywords

MIAX, Miami International Holdings, Cynthia Schwarzkopf, Form 4, Insider Trading, Stock Options, 10b5-1 Plan, Director Transaction, Equity Sale