Ecopetrol, formerly known as Empresa Colombiana de Petróleos S.A. (lang-en|Colombian Petroleum Company) is the largest and primary petroleum company in Colombia. As a result of its continuous growth, Ecopetrol forms part of the Fortune Global 500 and is ranked 303, it belongs to the group of the 25 largest petroleum companies in the world, and it is one of the four principal petroleum companies in Latin America.  Wikipedia