Form 4: MIAX Executive Edward Deitzel Trades Shares

Edward Deitzel, EVP, CRO, CCO of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX), reported transactions involving common stock and stock options on July 6, 2026, executed under a Rule 10b5-1 trading plan.

Summary

• Edward Deitzel, an executive officer of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX), reported several transactions on July 6, 2026.
• These transactions included the acquisition of 7,333 shares of common stock at $12 per share and an additional 3,667 shares at $12 per share.
• Deitzel also disposed of 11,000 shares of common stock at a weighted average price of $42.04 per share.
• The acquisitions were linked to the exercise of nonqualified stock options, with 7,333 options exercised at a $12 strike price and 3,667 options exercised at a $12 strike price.
• All reported transactions were executed as part of a Rule 10b5-1 trading plan established on December 30, 2025.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral filing. While it involves significant share transactions by an executive, the execution under a pre-established Rule 10b5-1 plan mitigates concerns about insider trading and suggests routine portfolio management rather than a strong signal about the company's future prospects.

Positives

• The acquisition of shares at a lower price ($12) through option exercises could indicate a belief in the long-term value of the stock, especially if the current market price is higher.
• The existence of a Rule 10b5-1 plan suggests pre-planned, systematic trading activity, which can be viewed positively as it reduces concerns about insider trading based on material non-public information.

Negatives

• The disposal of 11,000 shares at a higher price ($42.04) indicates a reduction in direct beneficial ownership by a key executive.
• The significant difference between the acquisition price ($12) and the sale price ($42.04) for some shares could represent a substantial profit-taking event by the executive.

Risks

• The sale of a significant number of shares by an executive could be interpreted by the market as a lack of confidence in future price appreciation, although it was executed under a pre-arranged plan.
• The Rule 10b5-1 plan itself, while designed to avoid insider trading concerns, still involves the disposal of company stock by an insider.

Future Outlook

The filing does not contain forward-looking statements or guidance. It solely reports past transactions.

Management Comments

• The transactions were effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 30, 2025.
• The transaction was executed in multiple trades throughout the day at prices ranging from $42.00 to $42.17. The price reported above reflects the weighted average sales price.
• The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
• The options are fully vested.

Industry Context

StockSavvy.ai notes that Form 4 filings are standard disclosures for insider transactions. The use of a Rule 10b5-1 plan by an executive at MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) is a common practice to manage stock sales in a way that complies with insider trading regulations, particularly relevant in the financial exchange industry where transparency is paramount.

Stakeholder Impact

• Shareholders: The sale of shares by an executive, even under a 10b5-1 plan, may lead to minor short-term market sentiment shifts, though the pre-planned nature aims to reduce this impact.
• Employees: The transactions do not directly impact employees but reflect the executive's compensation and investment strategy.
• Creditors: No direct impact on creditors is indicated by this filing.

Next Steps

• The reporting person will continue to adhere to the Rule 10b5-1 trading plan.
• The company may provide further disclosures if additional insider transactions occur.

Key Dates

Keywords

Form 4, SEC Filing, MIAMI INTERNATIONAL HOLDINGS, MIAX, Edward Deitzel, Stock Options, Common Stock, Insider Trading, Rule 10b5-1, Beneficial Ownership, Stock Transactions