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Deloitte is one of the "Big Four" accounting organizations and the largest professional services network in the world by revenue and number of professionals.[7] Deloitte provides audit, tax, consulting, enterprise risk and financial advisory services with more than 263,900 professionals globally.[8] In FY 2017, the network earned a record $38.8 billion USD in aggregate revenues.[5] As of 2016, Deloitte is the 6th-largest privately owned organization in the United States.[9]


As per reports in 2012, Deloitte had the largest number of clients amongst FTSE 250 companies in the UK[10] and in 2015, Deloitte currently has the highest market share in auditing among the top 500 companies in India.[11][12] Deloitte has been ranked number one by market share in consulting by Gartner,[13] and for the fourth consecutive year, Kennedy Consulting Research and Advisory ranks Deloitte number one in both global consulting and management consulting based on aggregate revenue.[14]

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