Citigroup Inc., a diversified financial service holding company, provides various financial product and services to consumers, corporations, governments, and institutions worldwide. It operates through five segments: Services, Markets, Banking, U.S. Personal Banking, and Wealth. The Services segment includes Treasury and Trade Solutions, which provides cash management, trade, and working capital solutions to multinational corporations, financial institutions, and public sector organizations; and Securities Services, such as cross-border support for clients, local market expertise, post-trade technologies, data solutions, and various securities services solutions. The Markets segment offers sales and trading services for equities, foreign exchange, rates, spread products, and commodities to corporate, institutional, and public sector clients; and market-making services, including asset classes, risk management solutions, financing, prime brokerage, research, securities clearing, and settlement. The banking segment includes investment banking; advisory services related to mergers and acquisitions, divestitures, restructurings, and corporate defense activities; and corporate lending, which includes corporate and commercial banking. The U.S. Personal Banking segment provides co-branded cards and retail banking services. The Wealth segment provides financial services to high-net-worth clients through banking, lending, mortgages, investment, custody, and trust product offerings; and to professional industries, including law firms, consulting groups, accounting, and asset management. The company was founded in 1812 and is headquartered in New York, New York.

Intercontinental Exchange, Inc., together with its subsidiaries, engages in the provision of market infrastructure, data services, and technology solutions for financial institutions, corporations, and government entities in the United States, the United Kingdom, the European Union, Singapore, India, Abu Dhabi, Israel, and Canada. It operates through three segments: Exchanges, Fixed Income and Data Services, and Mortgage Technology. The company operates regulated marketplaces for listing, trading, and clearing an array of derivatives contracts and financial securities, such as commodities, interest rates, foreign exchange, and equities, as well as corporate and exchange-traded funds; and trading venues, including regulated exchanges and clearing houses. It also offers energy, agricultural and metals, and financial futures and options; and cash equities and equity options, and over-the-counter and other markets, as well as listings and data and connectivity services. In addition, the company provides fixed income data and analytic, fixed income execution, CDS clearing, and other multi-asset class data and network services. Further, it offers proprietary and comprehensive mortgage origination platform, which serves residential mortgage loans; closing solutions that provides customers connectivity to the mortgage supply chain and facilitates the secure exchange of information; data and analytics services; and Data as a Service for lenders to access data and origination information. Intercontinental Exchange, Inc. was founded in 2000 and is headquartered in Atlanta, Georgia.

The Bank of New York Mellon Corporation provides a range of financial products and services in the United States and internationally. The company operates through Securities Services, Market and Wealth Services, Investment and Wealth Management, and other segments. The Securities Services segment offers custody, trust and depositary, accounting, exchange-traded funds, middle-office solutions, transfer agency, services for private equity and real estate funds, foreign exchange, securities lending, liquidity/lending services, and data analytics. This segment also provides trustee, paying agency, fiduciary, escrow and other financial, issuer, and support services for brokers and investors. The Market and Wealth Services segment offers clearing and custody, investment, wealth and retirement solutions, technology and enterprise data management, trading, and prime brokerage services. This segment also provides integrated cash management solutions, including payments, foreign exchange, liquidity management, receivables processing and payables management, and trade finance and processing services. The Investment and Wealth Management segment offers investment management strategies and distribution of investment products, investment management, custody, wealth and estate planning, private banking, investment, and information management services. The Other segment engages in the provision of leasing, corporate treasury, derivative and other trading, corporate and bank-owned life insurance, renewable energy investment, and business exit services. It serves central banks and sovereigns, financial institutions, asset managers, insurance companies, corporations, local authorities and high net-worth individuals, and family offices. The Bank of New York Mellon Corporation was founded in 1784 and is headquartered in New York, New York.

Nasdaq, Inc. operates as a technology company that serves capital markets and other industries worldwide. It operates in three segments: Capital Access Platforms, Financial Technology, and Market Services. The Capital Access Platforms segment sells and distributes historical and real-time market data; and develops and licenses Nasdaq-branded indices and financial products. This segment also offers investor relations intelligence, governance solutions, and ESG solutions; and insights and workflow solutions, as well as operates listing platforms. The Financial Technology segment offers Verafin, a cloud-based platform to detect, investigate, and report money laundering and financial frauds; surveillance solutions, including a SaaS platform to assist in complying with market rules, regulations, and internal market surveillance policies; AxiomSL, a risk data management and regulatory reporting solution; and Calypso, a front-to-back trading technology solution for the financial market. This segment also handles assets, comprising cash equities, equity derivatives, currencies, various interest-bearing securities, commodities, energy products, and digital currencies; and trade management and colocation services. The Market Platforms segment offers equity derivative trading and clearing, cash equity trading, fixed income and commodities trading and clearing, and currency trading services. This segment operates various exchanges and other marketplace facilities across various asset classes which includes derivatives, commodities, cash equity, debt, structured products, and exchange traded products; and provides clearing, settlement, and central depository services. The company was formerly known as The NASDAQ OMX Group, Inc. and changed its name to Nasdaq, Inc. in September 2015. Nasdaq, Inc. was founded in 1971 and is headquartered in New York, New York.

Tradeweb Markets Inc., together with its subsidiaries, builds and operates electronic marketplaces worldwide. The company's marketplaces facilitate trading in a range of asset classes, including rates, credit, money markets, and equities. It offers pre-trade data and analytics, trade execution, and trade processing, as well as post-trade data, analytics, and reporting services. The company provides flexible order and trading systems to institutional investors. It also offers a range of electronic, voice, and hybrid platforms to dealers and financial institutions on electronic or hybrid markets with Dealerweb platform; and trading solutions for financial advisory firms and traders with Tradeweb Direct platform. The company serves in the institutional, wholesale, and retail client sectors. Its customers include asset managers, hedge funds, insurance companies, central banks, banks and dealers, proprietary trading firms, retail brokerage and financial advisory firms, and regional dealers. The company was founded in 1996 and is headquartered in New York, New York. Tradeweb Markets Inc. operates as a subsidiary of Refinitiv Parent Limited.

MarketAxess Holdings Inc., together with its subsidiaries, operates an electronic trading platform for institutional investor and broker-dealer companies worldwide. The company offers trading technology that provides liquidity access in U.S. high-grade bonds, U.S. high-yield bonds, emerging market debt, eurobonds, municipal bonds, U.S. government bonds, and other fixed-income securities; and executes bond trades between and among institutional investor and broker-dealer clients in an all-to-all anonymous trading environment for corporate bonds through its Open Trading protocols. It also provides trading-related products and services, including composite+ pricing and other market data products to assist clients with trading decisions; auto-execution and other execution services for clients requiring specialized workflow solutions; connectivity solutions that facilitate straight-through processing; and technology services to optimize trading environments. In addition, the company offers various pre-and post-trade services, such as trade matching, trade publication, regulatory transaction reporting, and market and reference data across a range of fixed-income and other products. MarketAxess Holdings Inc. was incorporated in 2000 and is headquartered in New York, New York.

BGC Group, Inc. operates as a financial brokerage and technology company in the United States and internationally. The company offers various brokerage products, such as fixed income, such as government bonds, corporate bonds, and other debt instruments, as well as related interest rate derivatives and credit derivatives; equities, energy and commodities, shipping, insurance, and futures and options. It also provides trade execution, connectivity solutions, brokerage services, clearing, trade compression and other post-trade services, information, and other back-office services to an assortment of financial and non-financial institutions. In addition, the company offers electronic and hybrid brokerage, other financial technology solutions, market data and related information services. Further, its integrated platform is designed to provide flexibility to customers with regard to price discovery, execution and processing of transactions, Hybrid, or in various markets, as well as fully electronic brokerage services in connection with transactions executed either OTC or through an exchange. The company primarily serves banks, broker-dealers, investment banks, trading firms, hedge funds, governments, and corporations, as well as investment firms. BGC Group, Inc. was founded in 1945 and is headquartered in New York, New York.

Oppenheimer Holdings Inc. operates as a middle-market investment bank and full-service broker-dealer in the Americas, Europe, the Middle East, and Asia. The company provides brokerage services covering corporate equity and debt securities, money market instruments, exchange-traded options and futures contracts, municipal bonds, mutual funds, exchange-traded funds, and unit investment trusts; financial and wealth planning services; and margin lending services. It offers asset management services, including separately managed accounts, mutual fund managed accounts, discretionary portfolio management programs, non-discretionary investment advisory and consultation services, alternative investments, portfolio enhancement programs, and institutional taxable fixed income portfolio management strategies and solutions, as well as taxable and non-taxable fixed income portfolios and strategies. In addition, the company offers investment banking services, such as strategic advisory services and capital markets products; merger and acquisition, equities capital market, debt capital market, debt advisory and restructuring, and fund placement services; and institutional equity sales and trading, equity research, equity derivatives and index options, convertible bonds, event driven sales and trading, and portfolio and electronic trading. Further, it provides institutional fixed income sales and trading, fixed income research, public finance, and municipal trading services; and proprietary trading and investment activities. Additionally, the company offers underwriting, market-making, trust, and discount services, as well as a cloud-based financial market. It serves high-net-worth individuals and families, corporate executives, public and private businesses, institutions and corporations, governments, financial sponsors, and domestic and international investors. Oppenheimer Holdings Inc. was founded in 1881 and is headquartered in New York, New York.