Insider Trading July 14, 2026 04:09 PM

Barbara J. Comly Sells $1.17M in MIAX Stock Under Pre-Planned Trading Arrangement

Executive Vice President and General Counsel executes sale of vested options as Miami International Holdings reports operational growth and board changes.

By Jordan Park
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MIAX

Miami International Holdings, Inc. (NASDAQ: MIAX) Executive Vice President, General Counsel, and Corporate Secretary Barbara J. Comly has sold 28,000 shares of the company's common stock. The transaction, valued at approximately $1,175,440, was executed under a Rule 10b5-1 trading plan established in December 2025. Prior to the sale, Ms. Comly acquired the shares through the exercise of fully vested nonqualified stock options at $12.00 per share. The sale occurred on July 13, 2026, with a weighted average price of $41.98 per share. Following the transaction, Ms. Comly retains direct ownership of 882,984 shares of MIAX common stock. The disclosure comes as the company reports increased trading volume and recent corporate governance updates.

Barbara J. Comly Sells $1.17M in MIAX Stock Under Pre-Planned Trading Arrangement
MIAX
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Key Points

  • Executive Vice President Barbara J. Comly sold 28,000 shares of MIAX stock for approximately $1.17 million under a pre-established Rule 10b5-1 plan.
  • Miami International Holdings reported a 26% year-to-date increase in average daily trading volume for its exchange group, reaching 10.9 million contracts through June 2026.
  • The company updated its executive compensation framework with a new Senior Executive Annual Bonus Plan effective for performance periods starting January 1, 2026.

Barbara J. Comly, serving as Executive Vice President, General Counsel, and Corporate Secretary of Miami International Holdings, Inc. (NASDAQ: MIAX), executed a significant sale of company equity on July 13, 2026. The transaction involved the disposition of 28,000 shares of MIAX common stock, resulting in proceeds totaling approximately $1,175,440. The shares were liquidated at a weighted average price of $41.98 per share. Individual trade executions occurred within a price range spanning from $41.40 to $43.52. At the time of reporting, the stock was trading at $41.27, which corresponds to a corporate market capitalization of approximately $4 billion.

Ms. Comly's sale followed the acquisition of the identical 28,000 shares of common stock. This prior acquisition was facilitated through the exercise of nonqualified stock options that had reached full vesting status. The cost basis for these shares was $12.00 per share, aggregating to a total acquisition value of $336,000. Both the option exercise and the subsequent sale of shares were conducted under a Rule 10b5-1 trading plan. Ms. Comly originally established this pre-arranged trading framework on December 18, 2025.

Following the completion of these transactions, Ms. Comly's direct holdings in Miami International Holdings, Inc. common stock stand at 882,984 shares. The sale activity occurs against a backdrop of corporate developments for MIAX. The company recently disclosed a 26% increase in year-to-date average daily volume for its MIAX Exchange Group. This volume metric reached 10.9 million contracts through June 2026. Additionally, the Options Clearing Corporation has commenced providing clearing and settlement services for the MIAX Futures Exchange. This development supports the exchange's initiative to list Bloomberg equity index futures, which began in May.

Corporate governance and compensation structures also saw updates. Miami International Holdings adopted a new Senior Executive Annual Bonus Plan. This plan is effective for performance periods beginning January 1, 2026, and is designed to reward executive officers and other employees based on specific performance metrics. At the company's annual meeting, shareholders approved all fifteen nominees to the board of directors. Vote totals for the nominees varied significantly but were all in favor. Furthermore, the company disclosed the issuance of 1,881,554 shares of common stock to various investors and consultants between April 1 and June 17.

Market analysis platforms have noted positive sentiment surrounding the company. InvestingPro analysis suggests that MIAX appears undervalued at current levels. The platform highlights that shares have risen 38% over the past year. Additionally, four analysts have revised their earnings estimates upwards for the upcoming period. These factors suggest a positive outlook regarding the company's prospects.

Risks

  • The sale of shares by a key executive, while executed under a pre-arranged plan, may be viewed by the market as a signal regarding internal valuation perceptions.
  • The company has issued a substantial number of new shares to investors and consultants, which could potentially impact existing shareholder equity dilution.

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