Sustainable investments are increasingly leaving their niche position to enter financial markets in a remarkable way in recent years. In this scenario, ESG (Enviromental, Social, Governance) practices are emerging alongside the risk-return approaches that for years have exclusively determined the portfolio choices of investors. This paper aims to give a contribution to the flourishing debate on the application of ESG criteria to investments’ selection, using a case study through a benchmarking approach. The empirical investigation focuses on a two-level analysis of GIS Global Bond ESG Fund (EUR Hedged), managed by PIMCO management company. Results highlight that ESG practises should be referred more as a complementary rather than alternative approach for portfolio management.