Miami International Holdings

Miami International Holdings

Miami International Holdings was established in 2007 by Thomas Gallagher, a former executive at the Philadelphia Stock Exchange. The company operates as a holding entity for a collection of regulated national securities exchanges that compete directly with NYSE, Nasdaq, and CBOE. MIH does not disclose wealth-origin attribution; it functions as an institutional operator of market infrastructure rather than a family-affiliated investment vehicle. The firm's strategy centers on deploying a unified proprietary trading platform — MIAX Exchange Technology — across distinct exchange registrations to capture trading volumes in cash equities, equity options, and futures. Its flagship options exchange, MIAX, runs three separate options markets — MIAX Pearl, MIAX Emerald, and MIAX Sapphire — each designed with slight pricing or market-model variations to target different order-flow segments. In equities, MIAX Pearl Equities launched as a high-speed electronic market. The firm also operates the Minneapolis Grain Exchange (MGEX), acquired in 2020, which anchors its entry into agricultural commodities and futures clearing. MIH competes nationally, with its execution venues supporting trading firms and brokers based in Chicago, New York, and major electronic-market hubs. MIH remains privately held and does not publicly report total assets or deployment figures. In July 2024, the firm completed the acquisition of LedgerX, a CFTC-regulated digital asset futures and options exchange and clearinghouse, from FTX's bankruptcy estate (per the firm, July 2024). The deal marked MIH's entry into regulated crypto derivatives and added swap-execution-facility capabilities to its regulatory portfolio. Subsequent expansion has included the launch of MIAX Futures, consolidating the LedgerX and MGEX futures infrastructure under a single division. The firm has also stated an intention to launch a US-listed securities exchange for digital assets, though timing remains unspecified. MIH's structural differentiator is its vertically integrated exchange-operator model — it builds and controls the core matching-engine technology across all its registered venues rather than licensing third-party systems. This technology ownership gives it unusual cost flexibility to adjust pricing and maker-taker structures per venue, enabling targeted competition against larger exchange groups. The LedgerX integration extends this model into integrated clearing for crypto derivatives, a condition other US equity-options exchanges have not replicated, positioning MIH as a full-stack regulated-market operator spanning equities, derivatives, commodities, and digital assets.