Vodafone Group Plc is a British multinational telecommunications company headquartered in London and with its registered office in Newbury, Berkshire.[2] It is the world's second-largest mobile telecommunications company measured by both subscribers and 2011 revenues (in each case behind China Mobile), and had 439 million subscribers as of December 2011.[3][4][5]

Vodafone owns and operates networks in over 30 countries and has partner networks in over 40 additional countries.[6] Its Vodafone Global Enterprise division provides telecommunications and IT services to corporate clients in over 65 countries. Vodafone also owns 45% of Verizon Wireless, the largest mobile telecommunications company in the United States measured by subscribers.[7][8]

Vodafone has a primary listing on the London Stock Exchange and is a constituent of the FTSE 100 Index. It had a market capitalisation of approximately £89.1 billion as of 6 July 2012, the third-largest of any company listed on the London Stock Exchange. It has a secondary listing on NASDAQ. [Source: Wikipedia]