Form 4: MIAX EVP & CIO Exercises Options, Sells Shares

Miami International Holdings' EVP and CIO, Douglas M. Schafer Jr., exercised stock options and subsequently sold an equal number of shares under a pre-arranged 10b5-1 plan.

Summary

• Douglas M. Schafer Jr., EVP and CIO of Miami International Holdings, Inc. (MIAX), executed transactions on March 17, 2026.
• Exercised 48,000 nonqualified stock options at an exercise price of $12.00 per share.
• Immediately sold 48,000 shares of common stock at a weighted average price of $39.74 per share.
• The sale was conducted under a Rule 10b5-1 trading plan established on December 16, 2025.
• Following these transactions, Schafer directly owns 396,681 shares of common stock and 102,000 derivative securities (options).

Sentiment

Score: 6

Explanation: StockSavvy.ai views this as a neutral to slightly positive event. While it's an insider sale, the execution under a 10b5-1 plan mitigates concerns about opportunistic selling, and the executive still retains a significant stake.

Positives

• The executive realized a significant profit from the option exercise and subsequent sale, demonstrating personal financial gain.
• The transaction was executed under a pre-arranged Rule 10b5-1 plan, indicating a planned and not reactive sale.

Negatives

• The sale of shares by a key executive could be interpreted by some investors as a lack of confidence, although mitigated by the 10b5-1 plan.

Industry Context

StockSavvy.ai notes that insider transactions, particularly those executed under Rule 10b5-1 plans, are common practice for executives managing their equity compensation and personal finances. These plans are designed to allow insiders to sell shares without concerns of trading on material non-public information.

Related Party Transactions

• Douglas M. Schafer Jr., an EVP and CIO of Miami International Holdings, Inc., engaged in transactions involving the company's securities.

Stakeholder Impact

• Shareholders may observe the executive's decision to monetize a portion of their equity, which could be interpreted differently depending on individual investment philosophies. The transaction's execution under a 10b5-1 plan generally reassures stakeholders that the sale is not based on new, undisclosed information.

Key Dates

Recommendation

The transaction is an expected part of executive compensation management via a pre-scheduled 10b5-1 plan. It does not signal new fundamental information about the company's prospects, nor does it suggest a significant shift in the executive's long-term commitment, given the remaining holdings. Therefore, a 'hold' recommendation is appropriate as this filing alone does not warrant a change in investment thesis.

Keywords

MIAX, Miami International Holdings, Form 4, insider trading, stock options, Rule 10b5-1, executive compensation, share sale, Douglas M. Schafer Jr.