n'afọ 1854 William Cooper guzobere ụlọ ọrụ na-ahụ maka ịkwụ ụgwọ na London, nke ghọrọ Cooper Brothers afọ asaa ka e mesịrị mgbe ụmụnne ya atọ sonyeere.Na 1898, Robert H. Montgomery, William M. Lybrand, Adam A. Ross Jr. na nwanne ya nwoke T. Edward Ross guzobere Lybrand, Ross Brothers na Montgomery na United States.Na 1957 Cooper Brothers; Lybrand, Bros Ross & Montgomery na ụlọ ọrụ Canada McDonald, Currie na Co kwenyere ịnakwere aha Coopers & Lybrand na omume mba ụwa.Na 1973 ụlọ ọrụ ndị otu atọ na UK, US na Canada gbanwere aha ha na Coopers & Lybrand.Mgbe ahụ na 1980 Coopers & Lybrand gbasaa ọkachamara ya na enweghị ike ịkwụ ụgwọ site na inweta Cork Gully, ụlọ ọrụ na-eduga na mpaghara ahụ na UK na 1990.Na mba ụfọdụ, gụnyere UK, Coopers & Lybrand jikọtara ya na Deloitte Haskins & Sells na Lyopers & Coopers.
Coopers & Lybrand Deloitte