PETROBRAS (Latibex: XBPR/XBPRA), one of the largest energy company in the world, works in the exploration, production, refining, marketing and transportation of oil and petroliferous products. With more than 2 millons barrels a day and 9.300 millons barrels of stocks (91% in Brasil and 9% in oil fields in North America, South America and Western Africa) PETROBRAS ranks as the world's sixth biggest energy company quoted in the Stock Exchange.