Barclays is a holding company. Through its subsidiaries, Co. is a financial services provider engaged in retail banking, credit cards, wholesale banking, investment banking, wealth management and investment management services. Co.'s business segments are: Barclays U.K, which provides everyday products and services to retail customers and small to medium sized enterprises; Barclays International, which delivers products and services designed for Co.'s corporate, wholesale and international banking clients; and Head Office, which comprises head office and central support functions (including treasury) and businesses in transition.

HSBC Holdings is a financial services holding company. Through its subsidiaries, Co. operates four businesses: Retail Banking and Wealth Management, which serves customers through four businesses: Retail Banking, Wealth Management, Asset Management, and Insurance; Commercial Banking, which provides working capital, term loans, payment services, and international trade facilitation; Global Banking and Markets, which delivers a range of transaction banking, financing, advisory, capital markets, and risk management services; and Global Private Banking, which provides a range of private banking services. At Dec 31 2017, Co. had total assets of US$2.52 trillion and deposits of US$69.92 trillion.

Lloyds Banking Group is a financial services provider. Co.'s main business activities are retail and commercial banking, general insurance and long-term savings. Co.'s Lending products are mortgages, credit cards, personal and business loans; Deposit products include taking Current accounts and savings accounts; Insurance products are home insurance, motor insurance and protection; Commercial financing products includes term lending, debt capital markets and private equity; and Risk management products includes interest rate hedging, currency and liquidity. As of Dec 31 2017, Co. had total assets of £812.1 million and total deposits of £448.0 million.

Royal Bank of Scotland Group is a banking and financial services company. Co.'s activities are organized in franchise basis; Personal and Business Banking (PBB) comprising UK PBB and Ulster Bank RoI segment, which serve individuals and small businesses in the U.K. and the Republic of Ireland; Commercial & Private Banking comprising, Commercial Banking and Private Banking segment, which serve commercial, corporate and private banking in the U.K. and Western Europe; RBS International, which serves retail, commercial and financial institution in Jersey, Luxembourg and London; and NatWest Markets, which provides risk management and financing solutions through its trading and sales operations.