Line 4 (Yellow) is a line of the São Paulo Metro, originally called Southeast-Southwest Line. When finished, it will go from Luz to Vila Sônia. The first stretch, between and Faria Lima and Paulista stations, opened on May 25, 2010. Two other stations, Butantã and Pinheiros, were opened in July 2011.Today, the line goes from Butantã to Luz. It is expected that the line will be fully completed by 2015. It is operated by ViaQuatro, a private company which won the public-private partnership to operate Line 4 for 30 years, which can be renewable for another 30 years. Companhia do Metropolitano de São Paulo monitors the operation.