Petrobras is a publicly traded corporation operating in a integrated manner in the following segments of the oil, gas, and energy industry: exploration and production; downstream, marketing,transportation and petrochemicals; distribution; natural gas, energy and biofuels. Established in 1953, it was ranked the fourth largest energy company in the world by PFC Energy (market value criteria). The leader in the Brazilian oil industry, the company is expanding its operations with a view to being among the five largest integrated energy companies in the world.