Carlyle - Riverstone Partners; Celero Energy; DLB Oil & Gas; Energy Capital Partners; First Reserve Corporation; Kinder Morgan; L.S. Power Equity Advisors; Mariner Energy; Natural Gas Partners NGP Energy; Petroplus Holdings - Valero Energy Corporation (Delaware); Quantum Energy Partners;  Space Energy

Casino Group; Éxito (Colombia); Grupo Pão de Açúcar (Brazil)