S-Oil Corporation (hangul:에쓰-오일) is a petroleum and refinery company, headquartered in Seoul, South Korea. It was established in 1976 under its original name Iran-Korea petroleum company (hangul:한이석유). It produces petroleum, petrochemical, and lubricant products. The company was listed as a Fortune Global 500 company in 2009 (Rank 441). S-Oil's Onsan Refinery in Ulsan, South Korea has a capacity of some in 2016. Corporate governance , the CEO and Representative Director is Hussain A. Al-Qahtani. Ownership Saudi Aramco bought a 35% interest in August 1991, and increased it to 65% in 2014. The common stock shares are traded on the Korea Exchange. See also Economy of South Korea References External links (in English) (in Korean) Companies based in Seoul Non-renewable resource companies established in 1977 Oil companies of South Korea Chemical companies of South Korea Automotive fuel retailers South Korean brands Chemical companies established in 1977 South Korean companies established in 1977 Companies listed on the Korea Exchange