What are the big four accounting firms?

Deloitte; Ernst & Young; PwC; Kpmg. The four major accounting firms refer to the world-famous four major accounting firms, namely Deloitte, Ernst & Young, PricewaterhouseCoopers and KPMG. Among them, "PricewaterhouseCoopers" is one of the leading professional service organizations in the world, which was formed by the merger of PricewaterhouseCoopers and PricewaterhouseCoopers; Deloitte is one of the world's leading professional service organizations, established in 1845, one of the top four international accounting firms. KPMG was established in 1897, and it is one of the top accounting professional service organizations in the world. Ernst & Young, founded in 1989, is a multinational professional service company headquartered in London, England. These four accounting firms are the leading professional service companies in the world, providing services such as auditing, taxation and financial transaction consulting, with a history of 100 years.