Big Four

Here is the list of Big four companies

1. PricewaterhouseCoopers (Usually referred to as PWC , Pricewaterhouse, Pricewater or PricewaterhouseCoopers)
2. Deloitte Touche Tohmatsu (Usually referred to as Deloitte)
3. Ernst & Young (Usually referred to as Ernst & Young or E&Y)
4. KPMG (Usually referred to as KPMG )

It used to be Big Eight, but after a series of mergers such as Price Waterhouse merging with Coopers & Lybrand it became a big five. However after the Enron scandal and Arthur Anderson (initial part of the big five) shameful conduct it became the big four.