Saudi Arabian National Oil Company (English. Saudi Aramco, Arabic: الرامكو السعودية), commonly referred to as Saudi Aramco, is headquartered in Dhahran, Saudi Arabia, and the company owns the world's largest oil field, the Ghawar oil field. Saudi Aramco is the world's largest oil company, ranking first in the world in oil production and second only in oil reserves. (Source: "", 2013.11)