Espirito Santo Investment Bank is the banking investment unit of the Portuguese bank Banco Espírito Santo, with branches in Portugal, Spain, England, Ireland, Poland, USA, Brazil and Angola. ES Investment areas of expertise are corporate finance, project finance, acquisition finance and other lending, real estate investment banking, capital markets and market equity.

ES Investment was considered "Best Investment Bank in Portugal" in 2010 and 2009, by World Finance Magazine.