Ecopetrol S.A.https://pcaobus.org/form-ap-filings/8700/8700Ecopetrol S.A.87006/15/2017 7:08:02 PM2016cad42f89-b2c7-4465-974e-2915136c77c71522Ernst & Young Audit S.A.S.433446Ecopetrol S.A.1444406EC; ECP.0152253010Francisco Jose Gonzalez Rodriguez0152253010True