Vodafone Group plc is a global telecommunications company headquartered in London, United Kingdom. It is the world's largest mobile telecommunications company measured by revenues and the world's second-largest measured by subscribers (behind China Mobile), with around 341 million proportionate subscribers as of November 2010. It operates networks in over 30 countries and has partner networks in over 40 additional countries. It owns 45% of Verizon Wireless, the largest mobile telecommunications company in the United States measured by subscribers.
The name Vodafone comes from voice data fone, chosen by the company to "reflect the provision of voice and data services over mobile phones".
Its primary listing is on the London Stock Exchange and it is a constituent of the FTSE 100 Index. It had a market capitalization of approximately £93 billion as of 9 March 2011, making it the fourth largest company on the London Stock Exchange. It has a secondary listing on NASDAQ.