Audit/Accounting firms - the Big Four - Statistics & Facts

The term „Big Four“, in relation to auditing and accounting, refers to the four major professional services networks specializing in accountancy and professional services. The Big Four companies serve as auditors for the majority of publicly traded companies, and deal with a number of private companies as well. The combined revenue of the Big Four (Ernst & Young, KPMG. Deloitte and PwC) amounted to more than 123 billion U.S. dollars in 2015.

According to revenue figures from 2015, PricewaterhouseCoopers (PwC) was the biggest of the four companies, with around 35.4 billion U.S. dollars in revenue for that year. Deloitte also generated more than 35 billion U.S. dollars in revenue in 2015. Ernst & Young and KPMG, also high rollers in the industry, generated 28.66 and 24.44 billion U.S. dollars in revenue respectively. The Big Four generate the largest share of their revenue through their audit/assurance branches.

Each of these four firms employs more than 150,000 people a piece. Deloitte has the most employees at approximately 225 thousand and KPMG has the fewest with around 178 thousand employees.

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