PricewaterhouseCoopers is a multinational professional services network headquartered in London, United Kingdom. It is the largest professional services firm in the world, and is one of the Big Four auditors, along with Deloitte, EY and KPMG. Vault Accounting 50 has ranked PwC as the most prestigious accounting firm in the world for seven consecutive years, as well as the top firm to work for in North America for three consecutive years.PwC is a network of firms in 157 countries, 756 locations, with more than 208,100 people. As of 2015, 22% of the workforce worked in Asia, 26% in North America and Caribbean and 32% in Western Europe. The company's global revenues were $35.4 billion in FY 2015, of which $15.2 billion was generated by its Assurance practice, $8.9 billion by its Tax practice and $11.3 billion by its Advisory practice.The firm was formed in 1998 by a merger between Coopers & Lybrand and Price Waterhouse. The trading name was shortened to PwC in September 2010 as part of a rebranding., PwC is the 5th-largest privately owned company in the United States.NameThe PricewaterhouseCoopers name was formed by the combination of the names of Price Waterhouse and Coopers & Lybrand, following their merger in 1998. On 20 September 2010, PricewaterhouseCoopers rebranded as PwC, although the legal name of the firm remained PricewaterhouseCoopers.HistoryThe firm was created in 1998 when Coopers & Lybrand merged with Price Waterhouse. Both firms had histories dating back to the 19th century.