What is the largest bank in Brazil?|was formed through the merger of Banco Itaú and Unibanco in 2008. It is the largest banking institution in Brazil, as well as the largest in Latin America, and the seventh-third largest bank in the world . The bank is listed on the B3 in São Paulo and in NYSE in New York. Itaú Unibanco S.A.Itaú Unibanco