SAMREF is an equally owned joint venture between Saudi Arabian Oil Company (Saudi Aramco) and Mobil Yanbu Refining Company Inc. (a wholly owned subsidiary of Exxon Mobil Corporation).

Saudi Arabian Oil Company (Saudi Aramco) is the worlds largest oil producing and exporting company and was established by Royal Decree in 1988 to assume the responsibilities of its predecessor, Aramco that has a history dating back more than 70 years.

Exxon Mobil Corporation is a global energy company with a history dating back more than 132 years and which conducts business in 140 countries on every continent throughout the world.

SAMREF is a complex refinery which was formed for the development, construction, ownership and operation of crude oil refining facilities in Yanbu, Saudi Arabia. Following the construction and start-up of the facilities, it commenced operations on November 15, 1984.