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.
Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on Miami Intl Hldg's stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.
Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time EDGAR feed updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into Miami Intl Hldg's regulatory disclosures and financial reporting.
Miami International Holdings, Inc. chairman and CEO reported a transfer of shares to a family member. On 12/23/2025, he made a bona fide gift of 2,000 shares of common stock to his son. The shares given are subject to a lock-up agreement that he entered into on December 11, 2025, and the son has agreed to be bound by that agreement.
After this gift, he beneficially owns 585,963 shares of Miami International Holdings common stock. This total includes 12,000 shares held jointly with his spouse with right of survival. The transaction is reported as a gift, so no price is associated with the transfer.
Miami International Holdings, Inc. executive leadership reported multiple stock option exercises that increased direct ownership of the company’s common stock. The reporting person is an officer serving as EVP and Chief Strategy Officer.
On 12/16/2025, the officer exercised incentive stock options at an exercise price of $12 per share in three separate transactions for 16,666, 8,333, and 8,333 shares of common stock. Following these transactions, the officer beneficially owned 345,031 shares of common stock directly. The derivative securities table shows the related incentive stock option positions reduced to 0 derivative securities beneficially owned after the exercises, and the options are described as fully vested.
Miami International Holdings, Inc. reported that its EVP and CFO completed several incentive stock option exercises in company stock. On December 16, 2025, the executive exercised options to acquire 22,221 common shares at $13.50, 6,195 shares at $16.14, and 5,040 shares at $19.84.
After these transactions, the executive directly beneficially owned 127,612 shares of common stock. The filing also shows an incentive stock option with an exercise price of $19.84 for 5,040 shares expiring on March 28, 2033, and notes that 5,040 additional shares subject to this option are scheduled to vest on March 29, 2026, if the executive continues in service with the company or its subsidiaries.
Miami International Holdings, Inc. reported that between September 30 and December 15, 2025 it issued 4,006,946 unregistered shares of common stock, more than five percent of shares outstanding as of September 30, 2025. These shares came from converting a $5,000,000 convertible promissory note and accrued interest and from warrant exercises that generated $2,419,500 in cash plus the surrender of 733,923 shares through cashless exercises.
The company also disclosed that on December 15, 2025 certain existing stockholders completed a public secondary offering of 6,750,000 shares of common stock at $41.00 per share, and underwriters fully exercised an option to buy an additional 1,012,500 shares at the same price. Miami International Holdings did not sell shares in this offering and will not receive proceeds from these secondary sales.
Miami International Holdings, Inc.
The report also lists fully vested stock options held directly by the insider for 7,500, 10,000, 14,331 and 2,500 underlying shares at exercise prices between $16.14 and $25.98, as well as several currently vested warrants held indirectly through Horizon Kinetics Asset Management LLC for 24,878, 27,561, 21,290 and 38,927 underlying shares. Murray Stahl, who leads Horizon Kinetics Asset Management LLC, disclaims beneficial ownership except for any pecuniary interest.
Miami International Holdings, Inc., a Delaware-based company headquartered in Princeton, New Jersey, has filed a Form S-1 registration statement with the U.S. Securities and Exchange Commission for a proposed public offering of its securities. The company plans to begin sales "as soon as practicable" after the registration statement becomes effective, indicating an intention to access the public capital markets through an initial public offering process. The filing identifies Miami International Holdings’ chairman and chief executive officer, Thomas P. Gallagher, as the primary contact, and lists outside counsel from Reed Smith LLP and Ropes & Gray LLP, underscoring a formal step toward becoming a publicly traded company. The prospectus is currently preliminary, meaning the securities cannot be sold until the SEC declares the registration statement effective.
Miami International Holdings, Inc. (MIAX) reported that it has entered into an agreement to sell its wholly owned subsidiary, MIAX Derivatives Exchange (MIAXdx), to Robinhood Markets, Inc. in partnership with Susquehanna International Group. The deal is described in a MIAXdx Agreement between the parties.
The transaction is expected to close in the first quarter of 2026, subject to customary closing conditions and required filings with the Commodity Futures Trading Commission. MIAX also issued a press release on November 25, 2025, providing further details on the planned sale.
Horizon Kinetics Asset Management LLC filed an amended Schedule 13D reporting beneficial ownership of 9,499,995 shares of MIAMI INTERNATIONAL HOLDINGS, INC. common stock, representing 11.7% of the outstanding class as of the event date. The position includes 9,221,128 shares held in managed accounts and warrants exercisable for 278,867 additional shares. HKAM states it acquired the stake for investment purposes using client assets and may buy more or sell shares in the ordinary course through market or private transactions. The filing notes that Murray Stahl, HKAM’s Chairman, CEO and CIO, joined the issuer’s board of directors on July 15, 2025, which may give him influence over corporate activities, while HKAM disclaims beneficial ownership beyond its pecuniary interest.
Miami International Holdings (MIAX) reported Q3 2025 results highlighted by strong revenue growth and a one‑time financing charge tied to its IPO. Total revenue reached $339.8 million for the quarter (up from $276.7 million), driven by higher transaction and clearing fees ($292.8 million), access fees, and market data. Revenues less cost of revenues were $109.5 million versus $69.6 million a year ago. Operating results were near break‑even in the quarter, but non‑operating items included a $107.7 million loss on debt extinguishment, leading to a net loss of $102.1 million.
The company closed its IPO on August 15, 2025, issuing 17,250,000 shares at $23.00 and used proceeds to fully repay borrowings under its 2029 senior secured term loan. Year‑to‑date, operating income was $49.3 million on $994.6 million of revenue. The balance sheet strengthened with cash and cash equivalents of $401.5 million, stockholders’ equity of $831.9 million, and total assets of $1.23 billion as of September 30, 2025. MIAX also launched MIAX Sapphire and completed the acquisition of TISEG on June 5, 2025, expanding its exchange footprint.
Miami International Holdings (MIAX) announced its financial results for the quarter ended September 30, 2025. The company furnished a press release as Exhibit 99.1 under Item 2.02 to provide the details. The disclosure is being furnished to the SEC and is not deemed “filed” under the Exchange Act.
FAQ
What is the current stock price of Miami Intl Hldg (MIAX)?
What is the market cap of Miami Intl Hldg (MIAX)?
