Insider Trading May 7, 2026 04:10 PM

Miami International Holdings CEO Executes Stock Option Exercise and Subsequent Sale

Thomas P. Gallagher liquidates $755,000 in shares following an option exercise via a pre-established 10b5-1 plan.

By Caleb Monroe MIAX

Thomas P. Gallagher, the Chairman and CEO of Miami International Holdings, Inc. (NASDAQ: MIAX), recently completed a series of stock transactions involving the company's common equity. On May 5, 2026, Mr. Gallagher sold 15,771 shares of common stock, totaling approximately $755,746. These sales occurred at varying price points between $47.13 and $48.35 per share, resulting in a weighted average sale price of $47.92 per share.The transactions were executed through Gallagher Investments, LLC, an entity over which Mr. Gallagher holds both voting and dispositive control. These trades were conducted under the framework of a Rule 10b5-1 trading plan, which was originally established by the CEO on December 29, 2025. In conjunction with the sale, Mr. Gallagher exercised nonqualified stock options to acquire 15,771 shares at a set price of $12.00 per share, representing an acquisition cost of $189,252. At the time these options were exercised, they were fully vested.

Miami International Holdings CEO Executes Stock Option Exercise and Subsequent Sale
MIAX

Key Points

  • CEO Thomas P. Gallagher executed a $755k sale of 15,771 shares via a pre-planned Rule 10b5-1 strategy.
  • MIAX reported strong Q1 fiscal 2026 results with $129 million in revenue, a 40% year-over-year increase.
  • Earnings per share of $0.42 significantly outperformed the anticipated $0.27.

Executive Transaction Details

The recent activity by Miami International Holdings' top leadership involves a structured exchange of equity. Thomas P. Gallagher utilized his role as Chairman and CEO to execute a sale of 15,771 shares on May 5, 2026. The total value realized from this disposal was $755,746. During the transaction period, the share prices fluctuated within a range of $47.13 to $48.35, settling at a weighted average of $47.92 per share.

Simultaneous with this sale, Mr. Gallagher engaged in the exercise of nonqualified stock options. This allowed for the acquisition of 15,771 shares of common stock at an exercise price of $12.00 per share, totaling $189,252. These options were noted to be fully vested when the exercise took place. Both the purchase through option exercise and the subsequent sale were managed indirectly via Gallagher Investments, LLC, an entity under Mr. Gallagher's beneficial ownership and control.


Market Context and Financial Performance

The timing of these transactions occurs amidst a period of significant stock price movement for MIAX. Since the sale, the stock has risen to $49.76, placing it near its 52-week high of $51.38. This trajectory represents a total gain of 55% over the preceding year. However, internal analysis suggests that based on Fair Value assessments, the stock may currently be slightly overvalued.

Miami International Holdings' recent financial disclosures have been robust. The company reported first-quarter fiscal 2026 earnings that exceeded market expectations. Specifically, the firm posted earnings per share (EPS) of $0.42, which was a notable increase over the forecasted $0.27. Furthermore, quarterly revenue experienced a 40% year-over-year surge, reaching $129 million. This growth is attributed to the continued performance of the company's primary options business.

Following these results, Rosenblatt updated its outlook for the company, raising its price target from $59 to $61 while maintaining a Buy rating. Analysts cited the impressive quarterly earnings as the catalyst for this upward revision in estimates.


Key Market Observations

  • Executive Equity Management: The use of a Rule 10b5-1 plan, adopted in late 2025, indicates a structured approach to liquidating shares through Gallagher Investments, LLC.
  • Strong Revenue Momentum: A 40% year-over-year revenue increase highlights the expansion within the core options trading sector.
  • Earnings Outperformance: The disparity between actual EPS ($0.42) and forecasted EPS ($0.27) underscores strong operational execution in the first quarter of fiscal 2026.

These factors impact the broader financial services and exchange-trading sectors, where volatility and volume in options markets drive corporate revenue.


Risks and Uncertainties

  • Valuation Concerns: Despite recent gains, there are indications that the stock may be slightly overvalued relative to its Fair Value assessment.
  • Market Volatility: While the stock is trading near 52-week highs, maintaining this momentum involves navigating broader market shifts in the exchange and options sectors.

These uncertainties primarily impact investors focused on the capital markets and high-growth financial technology sectors.

Risks

  • Potential overvaluation of MIAX stock based on current Fair Value assessments.
  • Reliance on the continued strength of the core options business to maintain recent growth trajectories.

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