S-1/A: Miami International Holdings IPO Targets $21/Share

Miami International Holdings, Inc. filed an S-1/A for its initial public offering of 15 million shares at an estimated price of $19.00 to $21.00 per share, aiming to raise $268.3 million to repay debt and fund growth initiatives.

Summary

• Miami International Holdings, Inc. (MIH) is offering 15,000,000 shares of common stock in its initial public offering, with an estimated price range of $19.00 to $21.00 per share.
• Underwriters have an option to purchase an additional 2,250,000 shares.
• Net proceeds are estimated at approximately $268.3 million, or $310.2 million if the over-allotment option is fully exercised.
• Proceeds will be used to repay the 2029 Senior Secured Term Loan in full, for working capital, general corporate purposes, and to satisfy tax withholding and remittance obligations.
• Wellington Management, a cornerstone investor, has indicated interest in purchasing up to $40 million in shares at the IPO price.
• MIH's common stock has been approved for listing on the New York Stock Exchange under the symbol MIAX.
• The company reported revenues less cost of revenues of $196.5 million for the six months ended June 30, 2025, a 58.0% increase from $124.4 million in the same period of 2024.
• Net income for the six months ended June 30, 2025, was $2.1 million, a significant decrease from $102.3 million in the same period of 2024, primarily due to non-operating items like unrealized gains on derivative assets in the prior period.
• Adjusted EBITDA for the six months ended June 30, 2025, was $88.9 million, a 161.1% increase from $34.1 million in the same period of 2024.
• MIH recently completed the acquisition of The International Stock Exchange Group Limited (TISEG) in June 2025 for approximately $69.7 million.
• The company plans to launch new proprietary products, including futures on the Bloomberg 500 Index in Q4 2025 or Q1 2026, cash-settled index options on the B500 Index in H1 2026, and options on futures on the B500 Index in H2 2026.
• The 11th Circuit U.S. Court of Appeals vacated the 2023 CAT Funding Order on July 25, 2025, which could impact the company's ability to recoup historical and prospective CAT fees.

Sentiment

Score: 5

Explanation: While the company shows strong revenue and Adjusted EBITDA growth, driven by strategic acquisitions and new product launches, the significant drop in net income for the recent six-month period due to non-operating losses, coupled with declining U.S. Equities market share and regulatory uncertainty around CAT funding, presents a mixed financial picture. The IPO itself is a positive capital raise, but the immediate dilution for new investors is notable.

Positives

• Strong growth in revenues less cost of revenues, increasing by 58.0% to $196.5 million for the six months ended June 30, 2025, compared to the same period in 2024.
• Significant increase in Adjusted EBITDA, up 161.1% to $88.9 million for the six months ended June 30, 2025, compared to the same period in 2024, indicating improved operational profitability.
• Options market share increased to 16.4% for the six months ended June 30, 2025, from 15.3% in the prior period, driven by a 30.5% increase in MIH Options contracts.
• Futures agricultural products Average Daily Volume (ADV) increased by 37.7% for the six months ended June 30, 2025, due to higher volatility.
• Successful completion of the TISEG acquisition in June 2025, expanding international presence into UK and European markets.
• Launch of MIAX Sapphire electronic exchange in August 2024 and planned launch of a physical trading floor in Miami in September 2025.
• Strategic partnerships, such as the Bloomberg License Agreement, to develop and exclusively list new proprietary products like Bloomberg Products.
• High system reliability with MIAX Options, MIAX Emerald, MIAX Pearl, and MIAX Sapphire exchange markets being operational 99.99960800% of the time for the six months ended June 30, 2025.
• Cornerstone investor, Wellington Management, has indicated interest in purchasing up to $40 million in shares in the offering.
• The company is a technology-driven leader with in-house built proprietary technology, offering speed, performance, and reliability.

Negatives

• Net income for the six months ended June 30, 2025, was $2.1 million, a substantial decrease from $102.3 million in the same period of 2024, primarily due to non-operating unrealized losses on derivative assets ($47.0 million) and a realized loss on intangible assets ($2.1 million) in 2025, compared to significant gains in 2024.
• U.S. Equities market share decreased to 1.1% for the six months ended June 30, 2025, from 1.8% in the prior period, despite a 42.7% increase in overall U.S. Equities industry market shares.
• Equities segment continues to have negative capture, meaning liquidity payments exceeded transaction revenues, for the six months ended June 30, 2025.
• Futures agricultural revenue per contract decreased by 12.8% for the six months ended June 30, 2025, due to incentive programs.
• MIAXdx total volume of futures, options on futures, and swaps was only 101 contracts for the six months ended June 30, 2025, a 99.9% decrease from the same period in 2024, as it transitioned from physically settled products.
• The 11th Circuit U.S. Court of Appeals vacated the 2023 CAT Funding Order on July 25, 2025, which could lead to the company not being reimbursed for significant CAT fees.
• The company has a significant amount of outstanding debt, with $140 million under the 2029 Senior Secured Term Loan, bearing a 12.90% interest rate.
• Purchasers in this offering will immediately experience substantial dilution of $13.80 per share.
• The company does not intend to pay dividends on common stock in the foreseeable future, and its senior secured loan agreement prohibits dividend payments.

Risks

• A significant portion of operating revenues is generated by transaction and clearing-based business; a decrease in trading volume or a shift to lower revenue products could decrease revenues.
• Global economic, political, and financial market events or conditions (e.g., recessions, inflation, geopolitical conflicts) may negatively impact the business.
• Failure to maintain order flow from providers after the expiration of Equity Rights Programs (ERPs) could negatively affect results of operations.
• Revenues from market data fees and access fees may be reduced due to declines in market share, trading volumes, or regulatory changes (e.g., SEC review of non-transaction fees, CAT funding model challenges).
• Intense competition from other exchanges, OTC markets, clearing organizations, and technology firms could adversely affect market share and revenues.
• Dependence on senior management and key personnel, with the loss of such individuals potentially having a material adverse effect.
• Certain exchanges and clearing houses (e.g., MIAX Sapphire, MIAXdx) have limited operating histories, which may make it difficult to evaluate business and prospects.
• Exposure to risks related to defaults by clearing members and liquidity risks in operating a clearing house, particularly if MIAXdx offers margin on cleared products in the future.
• Settlement bank failures could pose credit and liquidity risks to MIAX Futures and MIAXdx clearing houses.
• Concentration of risks within MIAX Futures clearing house if clearing members reduce open interest, default, or withdraw.
• Risks related to loss or theft of crypto-assets delivered as collateral to MIAXdx by its participants, and legal uncertainty regarding crypto-asset custodial arrangements.
• Dorman Trading is subject to margin funding requirements on short notice and counterparty credit risk.
• Failure to successfully offer new services or product offerings, including Bloomberg Products or other proprietary products, could lead to missed market opportunities and unrecovered costs.
• Need for continued investment in operations and potential need for additional funds, which may not be readily available or may cause dilution.
• Risks associated with opportunistic acquisitions and strategic alliances, including integration challenges and failure to realize anticipated benefits.
• Inability to keep up with rapid technological changes, significant or recurring systems failures, or capacity constraints could harm reputation and business.
• Vulnerability of technology to security risks, cybersecurity risks, and operational disruptions.
• Dependence on third-party providers for key components and services (e.g., OCC, DTCC, FINRA).
• Financing agreements with secured lenders restrict current and future operations and ability to engage in certain business and financial transactions.
• Potential for dilution from future sales and issuances of common stock or rights to purchase common stock.
• Lack of an active trading market for common stock post-IPO and potential for price fluctuations.
• Self-regulatory obligations of exchanges may create conflicts of interest.
• Compliance with data privacy and data protection laws may result in greater costs.
• Litigation risks, regulatory compliance risks, and associated enforcement risks (e.g., Nasdaq patent infringement lawsuit, CFTC inquiries into MIAXdx).
• Changes to the legislative or regulatory environment (e.g., new CT Plan, Market Data Infrastructure Rule, financial transaction taxes, crypto-asset regulation) may impose new burdens or negatively impact revenues.
• Climate change and the transition to renewable energy and a net zero economy pose operational, commercial, reputational, and regulatory risks.
• Global health crises, pandemics, and other health risks could negatively affect the business.
• Failure to implement and maintain effective internal controls over financial reporting could lead to loss of investor confidence.

Future Outlook

The company expects to launch futures on the Bloomberg 500 Index in Q4 2025 or Q1 2026 on MIAX Futures, cash-settled index options on the B500 Index in H1 2026 on MIAX Options, and options on futures on the B500 Index on MIAX Futures targeted for H2 2026. MIAX Tini Bloomberg 100Q Futures are planned for launch in H1 2026. Other agricultural and financial futures products are intended for listing on MIAX Futures Onyx starting in H2 2025. A physical trading floor for MIAX Sapphire in Miami, Florida, is planned for September 2025. The company anticipates continued market share expansion across its options exchanges, growth in the futures market through significant investments, increased international presence via BSX and TISE, and further monetization of data and analytics capabilities. A significant decrease in income tax expense is expected in 2025 due to the One Big Beautiful Bill Act (OBBBA).

Management Comments

• We believe the speed and performance of our proprietary technology coupled with our fully integrated, award-winning customer service, sets us apart from our competitors.
• We are regarded as a market leader relative to many of our peers with respect to our technology, based on feedback from our customers.
• We believe that this reliability provides our customers with an additional incentive to use our platforms to mitigate trade execution risk, especially in times of extreme market volatility.
• We believe we are well positioned to grow and become a leading player in the U.S. regulated markets through our DCO and DCM regulatory licenses with the CFTC and national securities exchange licenses with the SEC.
• We believe that MIAX Futures unrestricted DCO license as it relates to futures and options on futures is highly valuable given that an unrestricted license can offer margin on cleared futures positions, as compared to certain other DCOs that offer fully collateralized clearing on futures positions.
• We believe that MIAX Futures is an attractive alternative to competitor DCOs given our partnership approach and track record of innovation and product development.
• We believe we are at an inflection point in our ability to further commercialize our market data.
• Management believes that we have strong relationships with our employees, and we have never experienced a work stoppage.
• Management does not believe that the outcome of any of these reviews or inspections will have a material impact on the consolidated financial position, results of operations or cash flows of the Company.
• The Company intends to continue defending its interest in this matter vigorously.
• The Company has no reason to believe MIAXdx will suffer such a theft or loss of private keys for the following reasons: (i) it has no known or historical experience of such theft or loss; (ii) it has established procedures around private key management to minimize the risk of theft or loss; and (iii) it accounts for and continually verifies the amount of digital assets that would be affected should multiple private keys be lost or stolen.

Industry Context

The company operates within a dynamic financial market infrastructure industry characterized by heightened market volatility, growing retail investor participation, rapid technological advances, increased sophistication of trading strategies, and the proliferation of new asset classes like cryptocurrencies and digital assets. Its strategy of expanding across multiple asset classes (options, equities, futures, international listings) and leveraging proprietary technology aligns with broader industry trends. The competitive landscape is intense, with established players like CME, Cboe, ICE, and Nasdaq, as well as emerging ATSs. Regulatory scrutiny, particularly regarding market data, clearing, and crypto-assets, is a significant factor, as evidenced by the ongoing CAT funding challenges and CFTC inquiries. The company's focus on innovation and customer service is a direct response to market demands for efficient and reliable trading platforms.

Comparison to Industry Standards

• Technology & Performance: The company's proprietary technology platform is highlighted for superior throughput, latency, reliability, and wire-order determinism in the U.S. options trading industry. MIAX Options, MIAX Emerald, MIAX Pearl, and MIAX Sapphire exchange markets achieved 99.99960800% operational uptime for the six months ended June 30, 2025, demonstrating high reliability compared to industry expectations for critical financial infrastructure.
• Market Share (U.S. Options): MIH's market share was 16.4% for the six months ended June 30, 2025, within a total U.S. exchange-traded options industry volume of 57.8 million average daily contracts. This positions MIH as a significant player, though behind larger, more established exchange groups.
• Market Share (U.S. Equities): MIAX Pearl Equities held a market share of 1.1% for the six months ended June 30, 2025, which is considerably lower than major incumbent exchanges like NYSE and Nasdaq, which collectively capture a larger portion of the approximately 8.5 billion average daily shares traded on-exchange.
• Global Derivatives Ranking: MIH is ranked as the 14th largest global derivatives exchange operator as of June 30, 2025, based on total futures and options contracts traded, indicating a growing but still mid-tier position in the global derivatives market.
• Clearing Services: MIAX Futures' unrestricted DCO license is a competitive advantage, allowing it to offer margin on cleared futures positions, unlike some other DCOs that are limited to fully collateralized clearing. This aligns with the increasing demand for central clearing services in the industry.
• International Listings: BSX is a global leader in listing Insurance Linked Securities (ILS) vehicles, with $52.7 billion outstanding notional value as of June 30, 2025, representing approximately 92.6% of the global issuance for catastrophic peril reinsurance coverage. TISE's Qualified Investor Bond Market (QIBM) is a leading market in Europe for listing high yield bonds and private equity debt, with over 4,500 securities listed, demonstrating strong positions in niche international markets.

Management Changes

Corporate Governance

Legal Proceedings

• Nasdaq Matter: Nasdaq, Inc. filed a lawsuit on September 1, 2017, alleging patent infringement and trade secret misappropriation. MIH's counterclaims (monopolization antitrust, patent misuse, sham litigation, fraud on USPTO, Lanham Act violations) are stayed pending resolution of the trade secret case. Motions for summary judgment are anticipated in H2 2025.
• CFTC Inquiries (MIAXdx): MIAXdx is responding to requests for information and documents from the CFTC's Division of Enforcement related to activities prior to MIH's acquisition (during FTX ownership). The outcome is unpredictable and could result in substantial costs, sanctions, diversion of resources, and reputational harm.
• CAT Funding Litigation: The 11th Circuit U.S. Court of Appeals vacated the 2023 CAT Funding Order on July 25, 2025, and stayed the decision for sixty days. This could require MIH's exchanges to stop charging historical and prospective CAT fees if a revised funding order is not issued, potentially leading to significant unrecovered costs.

Related Party Transactions

• Trading Activity with Exchange Members: Citadel Securities, Strategic Investments I, Inc. (Morgan Stanley affiliate), Susquehanna Securities, and Wolverine Holdings, LP (all significant shareholders or former shareholders) are customers. For 6 months ended June 30, 2025, these parties accounted for $245.9 million (39.7%) of total revenues and $241.1 million (57.0%) of total cost of revenues.
• ERP Transactions: Warrants were issued under ERP-V to Citadel Securities ($4M), SII ($1M), and Susquehanna Securities ($3M). ERP II, III, and IV warrants were exercised by these and other parties. SII exercised put rights for shares, with a portion of the obligation terminated in February 2025 due to a sale of shares to another ERP participant, leaving $11.4 million due on January 17, 2027 for remaining puttable shares. In December 2023, Citadel Securities waived ERP put rights for 3,371,620 shares in exchange for 131,576 common stock shares ($2.7M), and Wolverine waived rights for 2,985,110 shares for $2.4M cash.
• Loan Transaction with Wolverine: In December 2023, Wolverine provided a $1.5 million loan at 8% interest, with 7,408 warrants issued.
• Transactions with Citadel Securities: In December 2023, Citadel Securities acquired 92,611 shares for $1.9 million, with 9,261 warrants issued. Effective June 30, 2025, Citadel Securities exchanged 5,887,286 common shares and 331,218 non-voting common shares for a pre-funded warrant to purchase 6,218,504 common shares.
• Loan Transaction with Warburg Pincus and affiliates: In August 2024, a $100 million Senior Secured Term Loan was secured at 12.90% interest, with 3,795,564 warrants issued. In June 2025, an incremental $40 million term loan was received at 12.90% interest, used for the TISE Acquisition.
• Transactions with Murray Stahl and Related Parties: Murray Stahl (director, >5% holder) is CEO of Horizon Kinetics. A $46.1 million convertible loan from HK Class M Fund (July 2021) was converted to 2,709,866 common shares in May 2024. Other share and warrant transactions occurred with affiliated funds.
• Transactions with Timur Tillyaev and Related Parties (former >5% holder): A $5 million convertible loan (Dec 2020) and a $2 million convertible loan (Oct 2021) were held by Mr. Tillyaev or his affiliated entities. Warrants for 1,462,842 shares were extended in November 2023 for $535,400.
• Transactions with Paul Kotos (former director): Capital Investing, LLC (managed by Mr. Kotos) received advisory fees totaling $1.71 million from January 2022 to February 2025, plus additional fees for specific advisory services. Warrants held by Mr. Kotos and related entities were exercised or extended.
• Transactions with John Beckelman (director): As a Managing Director of Piper Sandler & Co. (an underwriter), PSC received financial advisory fees totaling $500,000 (Oct 2022), $650,000 (May 2023), $4,375,000 (Aug 2024), and $1,750,000 (June 2025) for various transactions.
• Transactions with Mark Massad (director): OneDigital Investment Advisors LLC (affiliated with Mr. Massad) received $300,000 in February 2025 for accounting-related advisory services for TISE.
• Transactions with Jassem Zainal (former director) and Talal Al-Bahar (director): A $1.8 million convertible loan from Arzan (affiliated with Mr. Al-Bahar) was converted to 105,973 common shares in March 2024. Arzan also received 750,000 warrants for stockholder services in March 2023.
• Employment Arrangements with Immediate Family Members: Dominique Prunetti-Miller (child of former director), Tia Toms (related to former director), and Katherine Comly (child of executive) received cash compensation and equity awards consistent with their roles.

Stakeholder Impact

• Shareholders: New investors will experience immediate and substantial dilution of $13.80 per share. Existing shareholders may also face dilution from future equity issuances. No dividends are planned, so returns depend on stock price appreciation. Ownership and voting limitations may impede change of control transactions. Certain shareholder-members may have differing economic interests.
• Employees/Management: Executive officers and directors are subject to lock-up agreements post-IPO. Equity incentive plans aim to align interests and enhance retention. Employment agreements provide severance benefits. The company's success depends on attracting and retaining highly skilled employees.
• Customers/Market Participants: Continued focus on technology, innovation, and customer service aims to attract and retain market participants. New product offerings are designed to expand market opportunities. Regulatory changes could impact fees, trading volumes, and compliance costs.
• Creditors: IPO proceeds will be used to repay the 2029 Senior Secured Term Loan, reducing debt obligations. Financing agreements contain covenants that restrict operations, impacting creditors' security.
• Regulators: The company is subject to comprehensive regulation by multiple authorities (SEC, CFTC, NFA, BMA, GFSC). Ongoing legal proceedings and regulatory developments highlight continuous scrutiny and compliance requirements.

Next Steps

• Launch futures on the Bloomberg 500 Index in Q4 2025 or Q1 2026 on MIAX Futures, subject to regulatory filings.
• Launch cash-settled index options on the B500 Index in H1 2026 on MIAX Options, subject to regulatory filings.
• Target launching options on futures on the B500 Index on MIAX Futures in H2 2026, subject to regulatory filings.
• Launch MIAX Tini Bloomberg 100Q Futures in H1 2026, subject to CFTC regulatory filings.
• List other agricultural and financial futures products on the MIAX Futures Onyx trading platform beginning in H2 2025, subject to regulatory filings and approvals.
• Launch a physical trading floor for MIAX Sapphire in Miami, Florida, in September 2025, subject to final construction related approvals.
• Continue expanding market share across options exchanges by monitoring fees, improving technology, and adding functionality.
• Expand access for participants on MIAXdx, incorporating an intermediated access model through FCMs and offering margin on cleared products, subject to CFTC approval.
• Further monetize and enhance data and analytics capabilities.
• Introduce additional functionality, expand data and analytics offerings, and implement pricing incentives for the cash equities exchange.

Key Dates

Recommendation

The company is undergoing an IPO to raise capital for debt repayment and growth, which is a positive step for its financial structure. It demonstrates strong operational growth in revenue and Adjusted EBITDA, driven by strategic acquisitions and a pipeline of new products. However, the substantial drop in net income for the most recent period, coupled with declining market share in U.S. Equities and regulatory uncertainty surrounding CAT funding, presents a mixed financial picture. The immediate dilution for new investors and the absence of planned dividends mean that investment returns will rely solely on capital appreciation, which is subject to market execution and broader economic conditions. A 'hold' recommendation is appropriate for seasoned investors to observe how the company navigates these challenges and executes its growth strategy post-IPO.

Keywords

Financial Market Infrastructure, Options Exchange, Futures Exchange, Equities Trading, SEC Filings, IPO, Derivatives Clearing, Market Data, Proprietary Technology, Cryptocurrency Derivatives, International Listings, Corporate Governance, Risk Management, Financial Performance, Capital Markets, Trading Platforms, Regulatory Compliance, Fintech, Exchange Operator