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Miami International Holdings Reports Trading Results for October 2025

1. MIAX set October trading records for volume and market share. 2. Daily market share reached 20.9% on October 14, 2025. 3. Monthly ADV increased 92.4% from October 2024 to 13.1 million contracts. 4. YTD ADV also hit a record of 9.4 million contracts, up 46.4%. 5. MIAX Futures achieved YTD ADV of 13,828 contracts, a 10.1% increase.

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FAQ

Why Very Bullish?

MIAX's significant volume growth and market share increases signal strong operational performance, akin to its previous milestones that led to stock appreciation.

How important is it?

Record trading volumes and market share indicate a strong financial position, likely attracting investor interest.

Why Short Term?

These trading results may lead to immediate investor confidence and potential short-term price rises, similar to previous quarterly results that positively influenced market sentiment.

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CMEICEEUREX
, /PRNewswire/ -- Miami International Holdings, Inc. (MIAX) (NYSE: MIAX), a technology-driven leader in building and operating regulated financial markets across multiple asset classes, today reported October 2025 trading results for its U.S. exchange subsidiaries — MIAX®, MIAX Pearl®, MIAX Emerald® and MIAX Sapphire® (collectively, the MIAX Exchange Group), and MIAX Futures™. October 2025 and Year-to-Date Highlights MIAX Exchange Group set a number of volume and market share records in October 2025 including: Daily market share record of 20.9% on October 14, 2025 Daily volume record of 19.7 million contracts on October 10, 2025 Monthly market share record of 19.4% in October 2025 Monthly average daily volume (ADV) record of 13.1 million contracts, a 92.4% increase from October 2024 Year-to-date (YTD) ADV record of 9.4 million contracts, a 46.4% increase from the same period in 2024 MIAX Futures reached a record YTD ADV of 13,828 contracts through October 2025, a 10.1% increase from the same period in 2024. Additional MIAX Exchange Group and MIAX Futures trading volume and market share information is included in the table below. Summary statistics including trading volume and market share by business segment, as well as rolling three-month average revenue per contract and capture rates are now available on the MIAX website at https://ir.miaxglobal.com/volume-rpc-reports. Average Daily Trading Volume (ADV) (1) Year-to-Date Comparison Oct-25 Oct-24 % Chg Sep-25 % Chg Oct-25 Oct-24 % Chg U.S. Multi-list Options Trading Days 23 23 21 209 211 U.S. Equity Options Industry ADV (000's) 67,193 44,322 51.6 % 61,299 9.6 % 55,442 43,393 27.8 % MIAX Exchange Group Options ADV (000's) 13,057 6,787 92.4 % 10,787 21.0 % 9,448 6,453 46.4 % MIAX Exchange Group Options Market Share      19.4 % 15.3 % 26.9 % 17.6 % 10.4 % 17.0 % 14.9 % 14.6 % U.S. Equities U.S. Equities Industry ADV (Millions) 20,996 11,665 80.0 % 18,309 14.7 % 17,613 11,674 50.9 % MIAX Pearl ADV (Millions) 218 191 14.0 % 205 6.6 % 190 200 -5.1 % MIAX Pearl Market Share 1.0 % 1.6 % -36.6 % 1.1 % -7.1 % 1.1 % 1.7 % -37.1 % MIAX Futures Exchange  Trading Days 23 23 21 210 211 MIAX Futures ADV 7,286 10,315 -29.4 % 5,973 22.0 % 13,828 12,554 10.1 % 1)  Calculated as total volume for the period divided by total trading days for the period. About MIAXMiami International Holdings, Inc. (NYSE: MIAX) is a technology-driven leader in building and operating regulated financial markets across multiple asset classes and geographies. MIAX® operates nine exchanges across options, futures, equities and international markets including MIAX Options, MIAX Pearl®, MIAX Emerald®, MIAX Sapphire®, MIAX Pearl Equities™, MIAX Futures™, MIAXdx™, The Bermuda Stock Exchange (BSX) and The International Stock Exchange (TISE). MIAX also owns Dorman Trading, a full-service Futures Commission Merchant. To learn more about MIAX please visit www.miaxglobal.com. Disclaimer and Cautionary Note Regarding Forward-Looking StatementsThis press release may contain forward-looking statements, including forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements describe future expectations, plans, results, or strategies and are generally preceded by words such as "may," "future," "plan" or "planned," "will" or "should," "expected," "anticipates," "draft," "eventually" or "projected." You are cautioned that such statements are based on management's current expectations and are subject to a multitude of risks and uncertainties that could cause future circumstances, events, or results to differ materially from those projected in the forward-looking statements, including the risks that actual results may differ materially from those projected in the forward-looking statements. Additional risks and uncertainties that may cause actual results to differ materially include the risks and uncertainties listed in Miami International Holdings, Inc.'s (together with its subsidiaries, the Company) public filings with the Securities and Exchange Commission. In providing forward-looking statements, the Company is not undertaking any duty or obligation to update these statements publicly as a result of new information, future events or otherwise. All third-party trademarks (including logos and icons) referenced by the Company remain the property of their respective owners. Unless specifically identified as such, the Company's use of third-party trademarks does not indicate any relationship, sponsorship, or endorsement between the owners of these trademarks and the Company. Any references by the Company to third-party trademarks is to identify the corresponding third-party goods and/or services and shall be considered nominative fair use under the trademark law. Contact: Investors [email protected]  Media [email protected]  SOURCE MIAX

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