Quick Answer: Capita plc is an international business process outsourcing and professional services company headquartered in London. It is the largest business process outsourcing and professional services company in the United Kingdom, with an overall market share of 29% in 2016, and has clients in central government, local government and the private sector. It also has a property and infrastructure consultancy division which is the fourth largest multidisciplinary consultancy in the UK. Roughly half of its turnover comes from the private sector and half from the public sector. Whilst UK-focused, Capita also has operations across Europe, Africa and Asia. Established in 1984 and gaining its independence in 1987 management buyout, Capita's early business activities were largely orchestrated by Rod Aldridge, the company's first executive chairman. Since 1991, it has been listed on the London Stock Exchange.