Form 4: MIAX Executive Trades Shares Under 10b5-1 Plan

Douglas M. Schafer Jr., EVP and CIO of Miami International Holdings, Inc. (MIAX), reported transactions involving common stock and stock options under a pre-arranged 10b5-1 trading plan.

Summary

• Douglas M. Schafer Jr., EVP and Chief Information Officer of Miami International Holdings, Inc. (MIAX), executed a series of transactions on July 2, 2026.
• These transactions were conducted under a Rule 10b5-1 trading plan established on December 16, 2025.
• Schafer acquired 6,000 shares of common stock at $12 per share and an additional 42,000 shares at $12 per share.
• Concurrently, 48,000 shares were disposed of at a weighted average price of $41.22, with individual trade prices ranging from $39.79 to $41.79.
• Following these transactions, Schafer beneficially owns 387,414 shares of common stock directly.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this filing as neutral to slightly negative. While the transactions were conducted under a Rule 10b5-1 plan, the significant sale of shares by a key executive, even with concurrent acquisitions, can be perceived negatively by the market.

Positives

• The transactions were executed under a Rule 10b5-1 plan, indicating pre-planned and potentially defensive trading strategies.
• The acquisition of shares at a lower price ($12) could be seen as an investment at a favorable valuation.
• The executive's continued beneficial ownership of a significant number of shares (387,414) suggests ongoing commitment to the company.

Negatives

• The disposal of 48,000 shares at a higher price ($41.22 average) represents a significant sale by a key executive.
• The substantial sale could be interpreted by the market as a lack of confidence in near-term stock appreciation, despite the acquisition of shares at a much lower price.

Risks

• Potential for negative market perception due to the significant sale of shares by a high-ranking executive, even if executed under a 10b5-1 plan.
• The weighted average sale price of $41.22 is considerably higher than the acquisition price of $12, indicating a substantial profit-taking event.

Future Outlook

The filing itself does not contain forward-looking statements or guidance. The transactions are historical events executed under a pre-determined plan.

Management Comments

• The transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025.
• The transaction was executed in multiple trades throughout the day at prices ranging from $39.79 to $41.79. 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 is a common strategy for executives to diversify holdings or manage personal finances without creating the appearance of trading on material non-public information. However, the significant volume of shares sold can still influence market perception.

Stakeholder Impact

• Shareholders may interpret the sale of a large number of shares by the EVP and CIO as a signal of reduced confidence, potentially impacting share price.
• Employees may view the executive's profitable stock transactions as a positive sign of the company's performance, though the sale might temper enthusiasm.

Next Steps

• The reporting person may continue to execute trades under the existing Rule 10b5-1 plan.
• The company may provide further disclosures if additional insider transactions occur.

Key Dates

Recommendation

The filing details routine insider transactions under a Rule 10b5-1 plan. While the sale of a significant number of shares by an executive could be a short-term negative catalyst, the concurrent acquisition of shares at a lower price and the overall context of pre-planned trading suggest a 'hold' recommendation. Investors should monitor the company's fundamental performance rather than solely reacting to this specific insider trade.

Keywords

Form 4, SEC Filing, Miami International Holdings, MIAX, Insider Trading, Stock Options, Rule 10b5-1, Beneficial Ownership, Executive Transactions, Stock Sale, Stock Purchase