Byco Petroleum Pakistan Limited engages in the production, marketing, and sale of petroleum products in Pakistan. The company operates through Oil Refinery Business, Petroleum Marketing Business, and Petroleum Storage Services segments. The Oil Refining Business segment engages in refining crude oil; and selling refined petroleum products to oil marketing companies. This segment provides liquefied petroleum gas, light naphtha, heavy naphtha, high octane blending components, motor gasoline, kerosene, jet fuels, high speed diesel, and furnace oil for use in bunkers and energy generation. The Petroleum Marketing Business segment is involved in the trading of petroleum products.