Form 4: MIAX Exec Buys Shares, Tax Withholding Noted

A Miami International Holdings executive reported an open market purchase of common stock and a disposition of nonvoting common stock for tax withholding.

Summary

• Edward Deitzel, EVP, CRO, CCO of MIAX Exchanges, reported transactions on August 13, 2025.
• Acquired 100 shares of Common Stock at $23 per share in an open market purchase.
• Disposed of 5,303 shares of Nonvoting Common Stock to satisfy tax withholding obligations related to restricted stock awards.
• Following these transactions, Deitzel directly owns 32,193 shares of Common Stock and 49,194 shares of Nonvoting Common Stock.
• Nonvoting Common Stock is convertible on a one-for-one basis into Common Stock and has no expiration date.

Sentiment

Score: 6

Explanation: The insider purchase of 100 shares indicates a minor positive signal of confidence, though the larger disposition was for tax withholding, which is a neutral event.

Positives

• An executive, Edward Deitzel, made an open market purchase of 100 shares of Common Stock, indicating a minor signal of confidence.

Future Outlook

NA

Industry Context

NA

Stakeholder Impact

• Shareholders: The insider purchase may be viewed as a minor positive signal of management confidence.

Key Dates

Recommendation

The filing is a routine insider transaction report. While a small insider purchase is a minor positive signal, it is not substantial enough to warrant a 'buy' recommendation, nor are there any negative indicators to suggest a 'sell'. The larger disposition was for tax purposes, which is a neutral event. Therefore, a 'hold' recommendation is appropriate as this filing does not provide new material information to change an existing investment thesis.

Keywords

MIAMI INTERNATIONAL HOLDINGS, MIAX, Edward Deitzel, Insider Trading, Form 4, Stock Purchase, Tax Withholding, Executive Compensation