Editing Exxon Mobil Corporation (section)

=== Key Players ===
The key players in the oil and industry can be divided into two main types: integrated and national oil companies. The integrated O&G companies which include Exxon, Chevron, BP, and Shell to name a few. Since Mexico nationalised its oil industry in 1938, other nations have either established private state-owned oil businesses or bought sizeable stakes in publicly traded oil firms. Oil nationalisation is becoming more popular as a means of countering historical international oil firms' exploitation of national resources and as a political ploy to control access to and decisions made about such resources. Some notable examples include Saudi Aramco, National Iranian Oil Company, Gazprom, and China National Petroleum Corporation.