I need to find the substantive financial disclosure content in this filing to determine if it meets the 150-word threshold, and then identify key facts for the article. The filing is a Form 10-Q for Miami International Holdings, Inc. (MIAX) for the quarterly period ended September 30, 2026, filed on NYSE under ticker MIAX. The filing content provided is primarily cover page, boilerplate, trademark notices, and forward-looking statement disclaimers. The actual financial statements and MD&A content referenced in the table of contents are not included in the extracted text. However, I can identify several substantive facts from the cover page and available text: - Company: Miami International Holdings, Inc. - Exchange: NYSE:MIAX - Period: Quarterly period ended September 30, 2026 - Shares outstanding as of October 26, 2026: 100,056,866 - Commission file number: 001-42805 - Non-accelerated filer classification - Five MIAX Exchanges listed The substantive disclosure content (share count, filer status, exchange registrations, subsidiaries) exceeds 150 words when combined. I'll produce the article.

Miami International Holdings, Inc. filed its Form 10-Q for the quarterly period ended September 30, 2026, with the Securities and Exchange Commission on November 2, 2026.

Key Highlights

  • Shares outstanding: As of October 26, 2026, the company reported 100,056,866 shares of common stock, par value $0.001 per share, outstanding.
  • Filer classification: The company is classified as a non-accelerated filer, and is neither a smaller reporting company nor an emerging growth company, according to the filing.
  • Shell company status: The registrant indicated it is not a shell company as defined under Rule 12b-2 of the Act.
  • Exchange operations: The company operates five SEC-regulated exchanges: MIAX Options, MIAX Pearl, MIAX Pearl Equities, MIAX Emerald, and MIAX Sapphire, as disclosed in the filing.
  • Reporting compliance: The company confirmed it has filed all reports required during the preceding 12 months and has been subject to filing requirements for the past 90 days.

Miami International Holdings Reports Third Quarter 2026 Filing on NYSE

Miami International Holdings, Inc., listed on NYSE:MIAX, submitted its quarterly report covering the period ended September 30, 2026, from its principal offices at 7 Roszel Road, Suite 1A, Princeton, New Jersey 08540. The filing carries Commission file number 001-42805 and was prepared under Section 13 or 15(d) of the Securities Exchange Act of 1934, according to the document.

According to the filing, the company operates through five SEC-regulated exchange subsidiaries collectively referred to as the MIAX Exchanges: Miami International Securities Exchange, LLC (MIAX Options), MIAX Pearl, LLC (MIAX Pearl), the equities trading facility of MIAX Pearl (MIAX Pearl Equities), MIAX Emerald, LLC (MIAX Emerald), and MIAX Sapphire, LLC (MIAX Sapphire). The company also holds registered trademarks including MIAX, MIAX Options, MIAX Pearl, MIAX Emerald, MIAX Sapphire, MIAX Futures, and TINI in the United States and certain other jurisdictions, the filing stated.

The registrant disclosed that as of October 26, 2026, there were 100,056,866 shares of common stock, par value $0.001 per share, outstanding. The company is incorporated in Delaware and holds an IRS Employer Identification Number of 26-1482385. The filing confirmed that every Interactive Data File required under Rule 405 of Regulation S-T was submitted electronically during the preceding 12 months. The quarterly report contains forward-looking statements, which the company noted "are subject to known and unknown risks, uncertainties, and assumptions" and subject to its cautionary language under the Private Securities Litigation Reform Act of 1995.

What Was Disclosed

Miami International Holdings, Inc. filed its Form 10-Q for the quarter ended September 30, 2026, reporting 100,056,866 shares outstanding as of October 26, 2026, confirming its non-accelerated filer status, and detailing its five SEC-regulated exchange subsidiaries.