PricewaterhouseCoopers (doing business as PwC) is a multinational professional services network headquartered in London, United Kingdom. PwC ranks as the second largest professional services firm in the world behind Deloitte, and is one of the Big Four auditors, along with Deloitte, EY and KPMG.
The firm was formed in 1998 by a merger between Coopers & Lybrand and Price Waterhouse. Both firms had histories dating back to the 19th century. The trading name was shortened to PwC in September 2010 as part of a rebranding effort.