ION Markets provides trading, automation, connectivity, analytics, and workflow technology across global capital markets. Website or institutional source

Intrinio is a financial-data platform providing APIs and feeds for equities, options, fundamentals, estimates, ETFs, indices, market prices, and related datasets. Website or institutional source

Interactive Brokers Prime Services provides global electronic market access, custody, margin financing, securities lending, execution, and reporting to hedge funds, proprietary trading firms, family offices, and professional investors. Website or institutional source

Incrementum is an owner-managed investment firm offering wealth-management and fund strategies with a strong emphasis on monetary analysis, tangible assets, precious metals, and commodities. Website or institutional source

Impactive Capital combines concentrated fundamental investing with active engagement on governance, operations, strategy, and financially material sustainability questions. Website or institutional source

ICE Data Services provides pricing, reference data, fixed-income evaluations, indices, analytics, exchange data, and connectivity to financial institutions globally. Website or institutional source

Hudson Bay Capital Management is a multi-strategy investment firm active across equities, credit, event-driven strategies, special situations, relative value, structured finance, and equity-linked securities. Website or institutional source

HSBC Prime Services operates within a global banking and markets network with particular strength across Asia, Europe, the Middle East, and other internationally connected markets. Website or institutional source

Horizon Trading Solutions provides electronic trading technology for market making, algorithmic execution, order management, structured products, and multi-asset workflows. Website or institutional source

Holocene Advisors is an investment manager specializing in diversified long/short and concentrated long-only equity strategies. Website or institutional source

High Ground Investment Management is a London-based global-equity hedge fund founded by former TCI partner Edgar Allen. Website or institutional source

HedgeServ is an independent fund administrator serving hedge funds, private equity, private credit, real estate, endowments, family offices, and other institutional investors. Website or institutional source

Hazeltree provides treasury, liquidity, collateral, counterparty, and portfolio-finance technology to hedge funds, private-markets firms, and asset managers. Website or institutional source

Hathersage Capital Management is a specialist global macro firm focused on G10 foreign exchange. Website or institutional source

Haidar Capital Management is a discretionary global macro specialist founded by Said Haidar. Website or institutional source

GSA Capital is a specialist quantitative manager that applies statistical research, technology, and systematic portfolio construction across global markets. Website or institutional source

Greenlight Capital is a value-oriented hedge fund manager known for detailed fundamental analysis, contrarian investments, and the willingness to express both long and short theses. Website or institutional source

Graham Capital Management is an established macro and quantitative investment firm with capabilities across discretionary macro, systematic macro, trend following, and multi-strategy portfolios. Website or institutional source

Goldman Sachs Prime Services is one of the defining global prime brokerage franchises. Website or institutional source

Goehring & Rozencwajg Associates is a specialist research and investment firm focused on natural resources. Website or institutional source