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. executive Shelly Brown exercised and sold shares in a planned transaction. On April 8, 2026, Brown exercised nonqualified stock options to acquire 16,434 shares of common stock at $12.00 per share and immediately sold 16,434 shares in an open-market transaction at a weighted average price of $42.08 per share. The filing notes the options were fully vested and the trades were executed under a previously established Rule 10b5-1 Plan adopted on December 22, 2025. After these transactions, Brown directly held 325,047 shares of common stock.
MIAMI INTERNATIONAL HOLDINGS, INC. executive Edward Deitzel exercised fully vested stock options and sold the resulting shares in pre-planned trades. Over April 7–8, he exercised options to acquire a total of 12,335 shares of common stock at $12.00 per share, then sold the same 12,335 shares in open-market transactions at prices around $42.00–$42.13. These transactions were executed under a previously established Rule 10b5-1 trading plan adopted on December 30, 2025, and Deitzel continues to hold 116,221 shares of common stock directly after the activity.
MIAMI INTERNATIONAL HOLDINGS, INC. executive Shelly Brown amended her insider trading report to correct an option exercise and related holdings. On April 7, she exercised 900 Nonqualified Stock Options at $12.00 per share, acquiring 900 shares of common stock, and simultaneously sold 900 shares at $42.00 per share.
She also sold 2,357 common shares on April 6 at $41.33 per share. After these transactions, she directly held 325,047 common shares and 64,434 option-based derivative securities. A footnote states the filing reflects a correction to the original option exercise and to the amount of securities beneficially owned.
Miami International Holdings, Inc. reported the passing of Murray Stahl, a member of its Board of Directors. The company described him as a valued board member and expressed gratitude for his dedication and service.
This change in board composition was disclosed under Item 5.02 of a current report.
MIAMI INTERNATIONAL HOLDINGS, INC. executive Shelly Brown, EVP and Chief Strategy Officer, sold a total of 3,257 shares of common stock in two open-market transactions. On April 7, 2026, she sold 900 shares at about $42.00 per share. On April 6, 2026, she sold 2,357 shares at about $41.33 per share. After these sales, she directly holds 324,147 shares. The filing notes that at least one transaction was carried out under a pre-established Rule 10b5-1 trading plan, indicating the sales were pre-planned rather than timed discretionarily.
MIAX submitted a Form 144 disclosing an intended sale of 17,334 shares of Common Stock through exercise of stock options on 04/07/2026. The filing lists an aggregate value of $721,614.42 and an exchange of NYSE.
Separately, the filing shows recent 10b5-1 dispositions by Shelly Brown of 2,357 shares for $97,419.76 on 04/06/2026 and 25,932 shares for $1,019,979.58 on 03/23/2026. Shares outstanding are listed as 91,651,482 as of 04/07/2026.
Morgan Stanley Smith Barney LLC submitted a Form 144 reporting a sale of 25,932 shares of Common Stock by Shelly Brown pursuant to a 10b5-1 plan on 03/23/2026, generating $1,019,979.58 in proceeds. The filing lists 91,651,482 shares outstanding as of 04/06/2026.
MIAMI INTERNATIONAL HOLDINGS, INC. director Judson Gray Teekell reported an open-market sale of 2,700 shares of Common Stock at $40.00 per share. After this transaction, he directly owns 59,338 shares. The trade was executed under a pre-established Rule 10b5-1 Plan adopted on December 17, 2025, indicating the sale was pre-planned rather than opportunistic.
MIAMI INTERNATIONAL HOLDINGS, INC. executive John Smollen reported a routine tax-related share disposition. On this Form 4, he surrendered 362 shares of common stock at $37.50 per share to the company to cover tax withholding tied to restricted stock awards. A footnote clarifies this was not an open-market sale by the reporting person. After this transaction, Smollen directly holds 170,757 shares of MIAX common stock.