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MIAX customer relationships

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MIAX customers relationship map

MIAX customer relationships: who powers and buys the exchange

Miami International Holdings (MIAX) operates regulated marketplaces and sells market technology and distribution services to institutional participants and other exchanges. The company monetizes via transaction fees, connectivity and market data services, and licensing/distribution partnerships that scale revenue without proportional fixed-cost increases. Strategic asset sales and distribution agreements amplify recurring revenue while concentrating execution risk around a handful of large partners. Learn more at https://nullexposure.com/.

Quick read: why these relationships matter to investors

MIAX’s value rests on two axes: market access and distribution (who routes and lists through MIAX) and commercial partnerships (who licenses MIAX products or acquires strategic stakes). Recent corporate actions reposition MIAX from pure operator toward a hybrid platform owner that sells stakes in specialized venues while retaining technology revenue streams. That shift changes revenue mix, concentration, and operational leverage.

The relationship set — names to know

  • Susquehanna International Group / Susquehanna Investment Group
  • Robinhood Markets (HOOD) / Robinhood Markets, Inc. / Robinhood
  • CME Group / CME

Below I treat each relationship noted in MIAX’s public record and press coverage and summarize the commercial fact set investors need.

Susquehanna International Group

Susquehanna partnered with Robinhood in the acquisition of a controlling interest in MIAXdx; MIAX disclosed selling 90% of MIAXdx while retaining a 10% stake in late 2025, placing Susquehanna as a principal JV partner in that transaction. This establishes Susquehanna as an owner/operator partner rather than a simple customer. (MIAX Q4 2025 earnings call, March 2026; MIAX press release via PR Newswire, Jan 2026)

Susquehanna Investment Group (name variant)

Press coverage uses the variant “Susquehanna Investment Group” to describe the same transaction: acquisition of a 90% stake in MIAXdx alongside Robinhood. The naming variance in news sources does not change the economic role — Susquehanna plays a strategic ownership role in MIAXdx post-sale. (SimplyWall.St summary, May 2026; TradingView / Finance Magnates coverage, Mar 2026)

Robinhood Markets (HOOD)

Robinhood and a Susquehanna-led partner acquired 90% of MIAXdx from MIAX in January 2026, converting MIAXdx from a wholly owned exchange into a JV-controlled platform; MIAX retains a 10% interest. That transaction shifts a large portion of derivatives execution economics and operating responsibility to Robinhood/Susquehanna while MIAX preserves equity upside and potential fee or technology arrangements. (MIAX press release via PR Newswire, Jan 2026; TradingView reporting, Mar 2026)

HOOD (ticker reference)

Public coverage and filings frequently reference the transaction with Robinhood by ticker; SEC-grade public relations and multiple news outlets identified HOOD as the acquirer in the JV that purchased 90% of MIAXdx. For financial models, treat HOOD as the counterparty acquiring exchange economics, not merely a connectivity customer. (PR Newswire, Jan 2026; Bolsamania report, Mar 2026)

Robinhood Markets, Inc. (legal variant)

The corporate designation “Robinhood Markets, Inc.” appears in MIAX press material describing completion of the MIAXdx sale; the legal name formalizes Robinhood’s role and underscores that MIAX’s transaction was with an operating broker-dealer/retail platform integrating exchange ownership into its business model. (MIAX press release via PR Newswire, Jan 2026)

Robinhood (informal)

Informal references across trading press note that Robinhood, together with Susquehanna, now owns the majority of MIAXdx and will control its strategic direction. For investors, Robinhood’s ownership implies potential route flow and retail distribution changes for MIAXdx products. (TradingView / Finance Magnates, Mar 2026)

CME Group

CME Group functions not as an acquirer in this dataset but as a distribution partner: public commentary and analyst pieces note that CME distributes MIAX products, providing MIAX with extended market access and liquidity reach beyond its proprietary routing network. That distribution relationship positions CME as a commercial amplifier of MIAX product set rather than a competitor-only dynamic. (Finviz analysis, Mar 2026)

CME (ticker variant)

Media and analyst narratives refer to “CME” interchangeably with “CME Group” when discussing MIAX distribution arrangements; treat both mentions as the same commercial distributor relationship that broadens MIAX go-to-market capabilities. (Finviz, Mar 2026)

What these relationships mean for MIAX’s business model

  • Concentration and counterparty profile: The sale of MIAXdx to a Robinhood/Susquehanna JV shifts a meaningful portion of derivatives economics off MIAX’s balance sheet and into a concentrated joint-venture ownership structure. That reduces MIAX’s operational exposure to derivatives running costs while preserving upside through a retained 10% stake and possible service agreements. (MIAX Q4 2025 earnings call; PR Newswire, Jan 2026)
  • Contracting posture: MIAX is moving from direct operator to platform and partner manager in segments where it sees scale benefits; the company will increasingly rely on commercial contracts, licensing, and distribution relationships that trade operational burden for recurring or upfront proceeds.
  • Criticality of partners: Distribution partners such as CME materially expand MIAX’s addressable market and liquidity provisioning; ownership partners (Robinhood/Susquehanna) now control a key execution venue formerly consolidated in MIAX’s operating perimeter.
  • Maturity and financial profile: MIAX reports sizable revenue (Revenue TTM ~ $1.36bn) with positive operating margin (~12%) and negative net margin (-5.13%) as the company invests and restructures capital allocation toward higher-margin distribution and licensing outcomes. These numbers indicate a company in transition from growth-investment toward margin optimization. (MIAX FY data, latest quarter Dec 2025)

Constraints and company-level signals

There are no explicit contractual or regulatory constraints reported in the relationship payload for MIAX beyond standard disclosure of the MIAXdx sale. At the company level, the data signal a strategic de-risking — monetizing built assets (MIAXdx) to partners while retaining minority stakes — which reduces capital intensity and concentrates counterparty exposure to a small set of large institutions. This is a company-level operational choice, not a relationship-specific constraint.

Bottom line for investors

MIAX is converting exchange assets into partnership economics while preserving growth levers through distribution and minority ownership. That strategy reduces direct operating risk and creates concentrated exposure to a handful of large counterparties — an attractive trade if partners expand volume distribution, and a risk if partner flows underperform. For further analysis of MIAX’s post-transaction revenue mix and partner contracts, visit https://nullexposure.com/.

Key sources consulted: MIAX Q4 2025 earnings call (March 2026); MIAX press release via PR Newswire (Jan 2026); Finviz analysis (Mar 2026); TradingView / Finance Magnates coverage (Mar 2026); SimplyWall.St summary (May 2026); Bolsamania reporting (Mar 2026); FXNewsGroup coverage (Mar 2026).

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