Banco Itaú Unibanco S.A. is a Brazilian financial services company headquartered in São Paulo, Brazil.

Itaúsa, a large Brazilian conglomerate ranking among Fortune magazine's top 500 corporations in the world, serves as the parent company.

Outside Brazil, Itaú Unibanco has offices in Asunción, Buenos Aires, Cayman Islands, Dubai, Hong Kong, Lisbon, London, Luxembourg, Montevideo, Nassau, New York, Miami, Santiago, Shanghai, Tokyo, and Zürich.

In terms of credit volume, it represented 19% of the Brazilian system and in total deposits, funds and managed portfolios, 21% by 2008.

[4] On August 22, 2009, Banco Itaú Unibanco and insurance company Porto Seguro announced their alliance.