Ernst & Young is one of the largest professional services firms in the worl and one of the Big Four auditors, along with PricewaterhouseCoopers (PwC), Deloitte Touche Tohmatsu (Deloitte) and KPMG. According to Forbes Magazine, as of year 2007 it is also the 7th largest private company in US. Ernst & Young is a global organization consisting of many member firms. It is based at London, UK and the US firm is headquartered at 5 Times Square, New York, NY.