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S-
International Oil Company
Downstream
KRX: 010950
S-Oil
Seoul, South Korea · Established 1976 · Profile updated July 1, 2026
Official website ↗Auditor Executive Assessment
Prepared by the Asian Oil Intelligence Desk · Institutional due-diligence memorandum
S-Oil Corporation is a South Korean refiner majority-owned by Saudi Aramco, operating the 669 kbpd Onsan refinery in Ulsan and 2,300+ retail stations. Shaheen project adds 300 kbpd residue upgrading capacity.
FY2024 revenue approximated $35 billion with net income near $1.5 billion. Aramco crude supply provides feedstock advantage. Onsan refinery complexity ranks among the highest in Asia.
Shaheen petrochemical expansion integrates refining with para-xylene and olefin production. Aramco owners...
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