Miami International (NYSE:MIAX) CEO Thomas Gallagher Sells 47,000 Shares of Stock

Miami International Holdings, Inc. (NYSE:MIAX) CEO Thomas Gallagher sold 47,000 shares of the firm’s stock in a transaction that occurred on Thursday, September 3rd. The stock was sold at an average price of $42.43, for a total transaction of $1,994,210.00. Following the transaction, the chief executive officer owned 1,423,275 shares in the company, valued at approximately $60,389,558.25. This trade represents a 3.20% decrease in their ownership of the stock. The sale was disclosed in a legal filing with the SEC, which is available at the SEC website. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan.

Miami International Price Performance

MIAX stock opened at $42.50 on Friday. The company has a fifty day moving average price of $42.81 and a 200 day moving average price of $43.05. Miami International Holdings, Inc. has a 12 month low of $34.02 and a 12 month high of $57.14. The company has a market cap of $4.22 billion and a price-to-earnings ratio of 55.20.

Miami International (NYSE:MIAX) last issued its quarterly earnings data on Wednesday, August 5th. The company reported $0.48 earnings per share (EPS) for the quarter, topping the consensus estimate of $0.41 by $0.07. The company had revenue of $387.63 million for the quarter. Miami International had a net margin of 9.70% and a return on equity of 16.95%. The company’s revenue for the quarter was up 34.8% on a year-over-year basis. During the same period in the previous year, the business posted $0.48 earnings per share. As a group, analysts anticipate that Miami International Holdings, Inc. will post 1.7 earnings per share for the current year.

Institutional Inflows and Outflows

Large investors have recently added to or reduced their stakes in the company. State of Wyoming purchased a new stake in Miami International in the 4th quarter valued at approximately $26,000. National Bank of Canada FI acquired a new stake in shares of Miami International in the 3rd quarter valued at approximately $29,000. Comerica Bank boosted its stake in shares of Miami International by 295.6% in the fourth quarter. Comerica Bank now owns 1,254 shares of the company’s stock valued at $56,000 after buying an additional 937 shares in the last quarter. Fifth Third Bancorp purchased a new stake in shares of Miami International in the first quarter valued at approximately $61,000. Finally, Caitong International Asset Management Co. Ltd acquired a new position in Miami International during the fourth quarter worth $66,000.

Analyst Ratings Changes

Several brokerages recently issued reports on MIAX. Zacks Research cut Miami International from a “strong-buy” rating to a “hold” rating in a research report on Tuesday, June 23rd. Weiss Ratings reaffirmed a “hold (c)” rating on shares of Miami International in a research report on Friday, August 7th. Rosenblatt Securities lifted their target price on Miami International from $61.00 to $62.00 and gave the company a “buy” rating in a research note on Thursday, August 6th. Wall Street Zen cut Miami International from a “buy” rating to a “hold” rating in a research note on Sunday, August 23rd. Finally, Morgan Stanley downgraded Miami International from an “overweight” rating to an “equal weight” rating and decreased their price target for the stock from $53.00 to $50.00 in a report on Tuesday. Three investment analysts have rated the stock with a Buy rating and six have given a Hold rating to the company’s stock. According to MarketBeat.com, the company currently has an average rating of “Hold” and a consensus price target of $51.40.

Key Miami International News

Here are the key news stories impacting Miami International this week:

• Positive Sentiment: Miami International Holdings reported that the MIAX Exchange Group’s multi-list options average daily volume increased 25.5% year to date through August 2026, signaling continued momentum in the company’s core trading business. Miami International Holdings Reports August 2026 Trading Results
• Negative Sentiment: Morgan Stanley downgraded MIAX, pressuring the stock by raising concerns about its valuation, outlook, or potential upside. The downgrade was reported alongside a broader decline in the shares. Morgan Stanley downgrades Miami International Holdings
• Negative Sentiment: Company insiders reported selling approximately 169,000 shares worth about $6.6 million in aggregate. The sellers included CEO Thomas Gallagher, EVPs Douglas Schafer Jr., Edward Deitzel, and Barbara Comly, and Director Judson Teekell. Although all transactions were conducted under pre-arranged Rule 10b5-1 trading plans—and executives retained sizable positions—the concentration of sales may weigh on investor sentiment. SEC insider transaction filing

About Miami International

Miami International (NYSE:MIAX) is a U.S. exchange holding company that operates electronic trading venues and provides market infrastructure for listed options and related products. Its primary business activities include operating regulated exchanges, delivering market data feeds, and offering trading technology and connectivity services designed for professional traders, broker-dealers, and market makers. The company focuses on low-latency execution, order matching, and the operational controls required to support high-volume, automated trading strategies in listed derivatives.

Products and services provided by Miami International include fully electronic order matching engines, transmittable market data and feed products, colocation and connectivity solutions, and tools for risk management and regulatory compliance.