Atyrau Oil Refinery (ANPZ LLP) is one of the three leading oil refineries in Kazakhstan. It was built during the Great Patriotic War and put into operation in 1945. The owner of the refinery is JSC NC KazMunayGas (99%). The design processing capacity is 5.5 million tons per year, the processing depth is up to 86.4%.

The company produces over 20 (including markings) names of commodity petroleum products: liquefied petroleum gases, automotive, diesel fuels, jet engine fuels, vacuum gas oil, heating oil, fuel oil, marine fuel, petroleum cokes, technical sulfur, paraxylene, benzene, etc. Today, the plant is the only manufacturer in Kazakhstan petrochemical products.

The company makes a significant contribution to the economy of Atyrau region, being one of the largest taxpayers in the region.