Arthur Andersen

Arthur Andersen LLP, based in Chicago, was once one of the "Big Five" accounting firms among PricewaterhouseCoopers, Deloitte Touche Tohmatsu, Ernst & Young and KPMG, providing auditing, tax, and consulting services to large corporations. In 2002, the firm voluntarily surrendered its licenses to practice as Certified Public Accountants in the United States after being found guilty of criminal charges relating to the firm's handling of the auditing of Enron, an energy corporation based in Texas which later failed. The other national accounting and consulting firms bought most of the practices of Arthur Andersen. Although the verdict was subsequently overturned by the Supreme Court of the United States, it has not returned as a viable business.