ItaúBBACorporate&InvestmentBank Itaú BBA will show you opportunities in Latin America that almost no one else can. Itaú Unibanco is one of the largest financial conglomerates in Latin America. If you need advice on mergers, acquisitions, divestitures, equity and debt offerings in Latin America, you should speak to Itaú BBA, our Corporate & Investment Bank. You will find a partner with strategic vision and valuable experience to work with you on your most important corporate transactions. Itaú BBA. The Latin American Corporate & Investment Bank. Itaú BBA is the global corporate and investment banking brand of Itaú Unibanco Group.