Research, Citation, & Class Guides: Accounting: The Big Four

The Big Four

The Big Four are the four largest accounting firms that dominate the industry. Explore each firm's website for more information.

Deloitte
Deloitte first opened office in the United States in 1895. The company has over 170 locations around the world. In 2015 the company had revenues of over $35 billion.
Ernst and Young
Ernst & Young came into being in 1989 when Arthur Young & Company and Ernst & Ernst merged. In 2015, the company had revenues of more than $28 billion.
KPMG
In 1987, Peat Marwick International and Klynveld Main Goerdeler combined to form KPMG. The firms revenues for 2015 were over $24 billion.
PricewaterhouseCoopers (PwC)
PwC was formed in 1998 when Price Waterhouse and Coopers & Lybrand merged companies. As of June 30, 2015 PwC had revenues of over $34 billion.