EY shine sakamakon jerin haɗuwa da ƙungiyoyin magabata. An kafa tsohuwar haɗin gwiwar da aka kafa a 1849 a Ingila a matsayin Harding & Pullein. A wannan shekarar Frederick Whinney ya shiga kamfanin. An sanya shi abokin tarayya a 1859 kuma tare da 'ya'yansa maza a cikin kasuwancin, an sake masa suna Whinney Smith & Whinney a 1894.A 1903, kamfanin Ernst & Ernst ya kafa a Cleveland, Amurka ta Alwin C. Ernst da ɗan'uwansa Theodore kuma a 1906, Arthur Young & Co. an kafa shi ne ta hanyar Scotsman Arthur Young a Chicago. Tun farkon 1924, waɗannan kamfanonin Amurka sun haɗu da manyan kamfanonin Burtaniya, tare da Young Broads & Paterson Co. da Ernst Smith tare da Whinney & Whinney. A cikin 1979, wannan ya haifar da kafa kamfanin Anglo-American Ernst & Whinney, ƙirƙirar kamfanin lissafi na huɗu mafi girma a duniya. Tambaya: Menene babbar asusun lissafi a duniya?
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