Welcome to our dedicated page for MIAMI INTERNATIONAL HOLDINGS 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.
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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.
MIAX reporting person Shelly Brown submitted a Form 144 disclosing proposed and recent sales of common stock. The Form lists a proposed sale of 16,000 shares via exercise-of-options settlement on 07/06/2026 and multiple 10b5-1 sale transactions during April–June 2026.
Morgan Stanley Smith Barney LLC reported a Rule 144 notice covering 144,000 shares of Common Stock associated with an exercise of stock options on 07/02/2026. The filing lists $5,623,200.00 alongside the 144,000 shares and shows prior 10b5-1 sales of 48,000 shares on 06/02/2026 and 48,000 shares on 05/04/2026.
MIAX affiliate submitted a Form 144 notice proposing the sale of 6,313 shares of Common Stock on 07/02/2026 through Morgan Stanley Smith Barney LLC. The filing lists the method as an Exercise of Stock Options with cash proceeds and shows prior 10b5-1 sales of 5,250 shares on 06/02/2026 and 5,625 shares on 05/04/2026, with reported proceeds of $224,493.34 and $265,984.88, respectively.