MIAX reports record $141 million revenue; executive sells 44,445 shares

Barbara J. Comly, the Executive Vice President and Corporate Secretary of Miami International Holdings (MIAX), sold 44,445 shares of the company’s stock on August 4. The shares were sold at a price of $45.69 each, bringing in approximately $2.03 million. This sale represents a 5% reduction in Comly's direct stock holdings, which included shares acquired through option exercises.

This transaction comes on the heels of MIAX reporting a 35% increase in second-quarter net revenue, reaching $141 million. The surge in revenue has been attributed to a significant rise in options trading volume, with an average of 11 million contracts traded daily. The company’s strong performance has attracted attention, especially following its recent settlement in a long-standing lawsuit with Nasdaq, which it has already paid. Comly executed the stock sale under a Rule 10b5-1 trading plan, established in December 2025, indicating that it was a pre-scheduled liquidity event rather than a reaction to market conditions.

Despite this sale, Comly retains a substantial stake in the company, holding approximately 883,000 shares. This indicates confidence in MIAX's future prospects, especially as the firm has experienced robust growth since its public debut a year ago. Other insiders have also sold shares under similar trading plans, which suggests a coordinated effort rather than a signal of concern about the company’s performance.

Looking ahead, MIAX's management has cautioned investors about potential fluctuations in revenue as options trading volumes may decline. They anticipate that revenue per contract will revert to previous levels in the latter half of the year. Investors will need to monitor these developments closely to assess the company's ongoing momentum in a competitive marketplace.