Welcome to our dedicated page for Miami Intl Hldg SEC filings (Ticker: MIAX), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The SEC filings of Miami International Holdings, Inc. (NYSE: MIAX) provide detailed information about its capital markets activity, segment reporting and regulatory disclosures as an exchange operator. Through documents such as Form S-1 and Form 8-K, the company describes its business structure, operating segments and equity transactions.
In its Form S-1 registration statement, Miami International Holdings identifies operating segments associated with options, equities, futures and international markets, along with a corporate/non-segment category. The filing references revenue categories including transaction and clearing fees, access fees, market data fees and other products and services, giving investors insight into how the company characterizes its exchange-related activities.
Recent Form 8-K filings highlight specific events. An 8-K dated December 15, 2025 discloses unregistered sales of equity securities, including common stock issued upon conversion of a convertible promissory note and upon warrant exercises, and notes that aggregate unregistered issuances exceeded a threshold relative to shares outstanding as of a prior date. The same filing also describes the completion of a public secondary offering in which existing stockholders sold shares of common stock, with the company stating that it did not sell shares or receive proceeds.
Other 8-K reports address topics such as quarterly financial results, changes in the board of directors and the announcement of an agreement to sell a majority stake in MIAX Derivatives Exchange (MIAXdx) to Robinhood Markets, Inc. in partnership with Susquehanna International Group. These filings illustrate how the company uses current reports to communicate material events, corporate governance changes and strategic transactions.
On Stock Titan’s MIAX filings page, users can review these SEC documents as they are made available through EDGAR. AI-powered tools can help summarize lengthy forms such as S-1 and 8-K, highlight key segment and revenue disclosures, and surface notable equity issuance and offering details, making it easier to understand the regulatory information Miami International Holdings provides.
MIAMI INTERNATIONAL HOLDINGS, INC. director David A. Brown surrendered 171 shares of common stock on July 8, 2026 to cover tax withholding tied to the net settlement of restricted stock units. This was not an open-market sale. After this tax-withholding disposition, he directly holds 7,066 shares of common stock.
MIAMI INTERNATIONAL HOLDINGS, INC. Chairman & CEO Thomas P. Gallagher, through Gallagher Investments, LLC, completed a paired option exercise and share sale in MIAX common stock. On July 6–7, 2026, Gallagher Investments exercised nonqualified stock options for a total of 70,000 shares at an exercise price of $12.00 per share and sold the same 70,000 shares in open-market transactions at weighted average prices of $42.09 and $42.27 per share.
All reported transactions were executed under a previously established Rule 10b5-1 Plan adopted on December 29, 2025, indicating they were pre-scheduled. Following these transactions, Gallagher Investments holds 1,723,275 shares of MIAX common stock indirectly for Gallagher, who maintains voting and dispositive control.
Miami International Holdings executive Harish Jayabalan, EVP, CISO and CRO, exercised options and sold shares of common stock. He exercised a total of 20,000 options at an exercise price of $12.00 per share and sold 20,000 shares in an open-market transaction at a weighted average price of $42.12 per share.
The transactions occurred on July 6, 2026 under a previously established Rule 10b5-1 trading plan adopted on March 9, 2026. Following these moves, Jayabalan directly holds 78,065 shares of Miami International Holdings common stock.
MIAMI INTERNATIONAL HOLDINGS, INC. executive Edward Deitzel, EVP and CRO/CCO of MIAX Exchanges, sold 11,000 shares of common stock in an open-market transaction at a weighted average price of $42.04 per share, under a previously established Rule 10b5-1 trading plan.
On the same date, he exercised options to acquire 11,000 shares of common stock at $12.00 per share and reported direct ownership of 119,601 common shares following these transactions.
MIAMI INTERNATIONAL HOLDINGS, INC. executive Shelly Brown, EVP and Chief Strategy Officer, exercised options for 16,000 shares of Common Stock at $12.00 per share and sold 16,000 shares in an open-market transaction at a weighted average price of $42.13 per share.
The transactions were executed under a previously established Rule 10b5-1 trading plan and in multiple trades between $42.00 and $42.32 per share. Following these transactions, Brown directly holds 353,990 shares of Common Stock, and the exercised nonqualified stock options are fully used with none remaining outstanding.
MIAMI INTERNATIONAL HOLDINGS, INC. director Judson Gray Teekell reported an open-market sale of 3,000 shares of Common Stock at $40.00 per share. After this transaction, he directly holds 75,251 shares. The sale was executed under a previously established Rule 10b5-1 trading plan adopted on December 17, 2025, indicating it was pre-scheduled.
MIAMI INTERNATIONAL HOLDINGS, INC. director Kurt M. Eckert exercised stock options to acquire 5,250 shares of common stock at $12.00 per share, then sold 5,250 shares in an open-market transaction at an average price of $39.35 on July 2, 2026.
These trades were made under a previously established Rule 10b5-1 trading plan adopted on December 18, 2025. Following the transactions, Eckert directly holds 149,612 shares of common stock and 1,063 stock options.
MIAMI INTERNATIONAL HOLDINGS, INC. executive Barbara J. Comly, EVP, General Counsel and Corporate Secretary, exercised options and sold shares of common stock. She exercised nonqualified stock options for 28,000 shares at $12.00 per share and sold 28,000 shares in an open-market transaction at a weighted average price of $41.22 per share.
The sale was made under a previously established Rule 10b5-1 trading plan adopted on December 18, 2025. Following these transactions, Comly directly holds 882,984 shares of common stock, indicating that the sale represents a small portion of her overall stake.
MIAMI INTERNATIONAL HOLDINGS, INC. EVP and CIO Douglas M. Schafer Jr. reported exercising stock options and selling shares of common stock. He exercised options covering a total of 48,000 shares at an exercise price of $12.00 per share, converting derivative awards into common stock.
On the same date, he executed an open‑market sale of 48,000 common shares at a weighted average price of $41.22 per share, in trades ranging from $39.79 to $41.79. After the reported sale, he directly held 387,414 common shares. The filing notes that the sale was carried out under a previously established Rule 10b5‑1 trading plan adopted on December 16, 2025, indicating the transactions were pre‑scheduled rather than opportunistic.
MIAX: A Form 144 notice reports an exercise of stock options and planned sale of 20,000 shares of Common Stock. The filing also lists two completed 10b5-1 sales by Harish Jayabalan: 9,783 shares ($391,752.41) on 06/09/2026 and 10,217 shares ($409,930.56) on 06/08/2026.