Essential Fact – Renuncia de Director Emilio Pellegrini – March 30, 2011
Essential Fact – Convocatoria a Junta Ordinaria de Accionistas – March 30, 2011
Essential Fact – Comunicado acuerdos Junta Ordinaria de Accionistas – April, 2011
Essential Fact – GasAndes Transaction – December, 2011
Essential Fact – Guarantees Construction Contract Santa Maria 1 – December, 2011
