PricewaterhouseCoopers (or PwC) is one of the world's largest professional services firms. It was formed in 1998 from a merger between Price Waterhouse and Coopers & Lybrand, both formed in London. blank">PWC History and milestones

PricewaterhouseCoopers earned aggregated worldwide revenues of $25 billion PWC Global Annual Review 2007 Page 35 for fiscal 2007, and employed over 146,000 people PWC Global Annual Review 2007 Page 39 in 150 countries.

In the _United States, where it is the third largest privately owned organization, it operates as PricewaterhouseCoopers LLP.

PricewaterhouseCoopers is a Big Four auditor, alongside KPMG, Ernst & Young and Deloitte Touche Tohmatsu.