Pemex

Petróleos Mexicanos or Pemex (Spanish pronunciation: [ˈpemeks], Mexican Petroleum) is a Mexican state-owned petroleum company. It has a total asset worth of $415.75 billion, it is the second non-publicly listed largest company in the world by total market value, and Latin America's second largest enterprise by annual revenue as of 2009. However, the majority of its shares are non-publicly listed and under control of the Mexican government. The value of its publicly listed shares totalled $102 billion in 2010, representing approximately one quarter of the company's total worth. Asphalt and pitch had been worked in Mexico since the time of the Aztecs. Small quantities of oil were first refined into kerosene around 1876 near Tampico. By...