Aramco Overseas Company B.V. (AOC) is a subsidiary of the Saudi Arabian Oil Company (Saudi Aramco), based in Leiden, the Netherlands. AOC operates primarily in Europe, Asia, Australia and Africa, providing its affiliates in the Saudi Aramco global oil and gas enterprise with a wide range of services including finance support, supply chain management, technical support services and a variety of administrative support services.
AOC also holds interests in hydrocarbon refining companies in Asia as well as storage and terminal facilities in the Netherlands. AOC operates outside the Netherlands through branch offices in China, Japan, Malaysia and Italy.