EY, previously known as Ernst & Young, is a multinational professional services network that provides assurance, tax, information technology services (including managed services in areas like Cybersecurity, Cloud, Digital Transformation and AI), consulting, and transactions advice. Along with Deloitte, KPMG and PwC, it is one of the Big Four professional services firms. The EY network is composed of member firms of Ernst & Young Global Limited, a UK company limited by guarantee headquartered in London, England. EY is one of the largest professional services networks in the world.
