SaudiAramco, a Saudi state-owned oil company (formerly known as "Amoco", referring to Arab-American oil company), is the largest oil company in the world, and it is also the company with the richest proven reserves and the largest oil production in the world.
Headquartered in Dalam, Saudi Arabia, Saudi Aramco also operates the world's largest single oil and gas network-the main natural gas system.
1973, the Saudi Arabian government bought 25% of Amoco's shares, which increased to 60% before 1974, and finally took full control of Amoco at 1980.