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

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

Miami International Stock Down 0.5%

Shares of MIAX stock opened at $42.50 on Friday. Miami International Holdings, Inc. has a 52-week low of $34.02 and a 52-week high of $57.14. The stock has a market cap of $4.22 billion and a PE ratio of 55.20. The business has a 50-day simple moving average of $42.81 and a 200-day simple moving average of $43.05.

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

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

Analyst Ratings Changes

Several equities analysts have recently weighed in on MIAX shares. Keefe, Bruyette & Woods lifted their target price on shares of Miami International from $46.00 to $48.00 and gave the company a “market perform” rating in a report on Friday, August 7th. Zacks Research downgraded shares of Miami International from a “strong-buy” rating to a “hold” rating in a report on Tuesday, June 23rd. Wall Street Zen lowered shares of Miami International from a “buy” rating to a “hold” rating in a research report on Sunday, August 23rd. Rosenblatt Securities lifted their price objective on shares of Miami International from $61.00 to $62.00 and gave the company a “buy” rating in a report on Thursday, August 6th. Finally, Morgan Stanley downgraded shares of Miami International from an “overweight” rating to an “equal weight” rating and decreased their price objective for the stock from $53.00 to $50.00 in a research report on Tuesday, September 1st. Three research analysts have rated the stock with a Buy rating and six have issued a Hold rating to the stock. Based on data from MarketBeat, the company currently has a consensus rating of “Hold” and an average target price of $51.40.

Institutional Trading of Miami International

Institutional investors and hedge funds have recently made changes to their positions in the business. BlackRock Inc. acquired a new position in shares of Miami International during the 2nd quarter worth approximately $188,466,000. J Digital 6 LLC acquired a new stake in Miami International in the 2nd quarter valued at $67,157,000. Vanguard Group Inc. purchased a new stake in Miami International in the 3rd quarter worth $55,660,000. Alyeska Investment Group L.P. acquired a new position in Miami International during the third quarter worth $50,959,000. Finally, Bank of America Corp DE acquired a new position in Miami International during the second quarter worth $31,845,000.

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.