Dhahran, Saudi Arabia
State-owned Saudi Arabian Oil Co. (Saudi Aramco) is the king of oil. It is the world's #1 oil producer, supplying more than 10% of global oil demand. In 2012 the company had proved oil reserves of 260.2 billion barrels (the world's largest); it also owned 284.8 trillion cu. ft. of natural gas reserves (the fourth largest in the world). It operates refineries, markets oil internationally, and distributes it domestically. Saudi Aramco owns a fleet of oil tankers and invests in refineries, marketing, and distribution ventures in other countries, including China, Japan, South Korea, and the US. The company exports 55% of its crude oil to the Far East.