Petronas, short for Petroliam Nasional Berhad, is Malaysia's oil and gas company that was established on August 17, 1974. It is owned entirely by the Malaysian government, the company gets the rights to the entire oil and gas resources in Malaysia and is entrusted to develop and add value to the resource The. Petronas is among the largest companies in the world by Fortune Global 500 Fortune puts Petronas as the 95th largest company in the world in 2008 and 80th in 2009. The magazine also mentions the most profitable company Petronas as 13th in the world and to-1 in Asia.

Since its inception, Petronas grown into an international oil and gas company with business interests in 35 countries. At the end of March 2005, Petronas Group has 103 full subsidiary, 19 subsidiaries partially, and 57 related companies. These companies form the Petronas Group is involved in various activities based oil and gas. Financial Times called Petronas as one of the "new seven sisters", as well as the national oil and gas company owned by the government of the most influential non-OECD world.

This group is involved in a wide spectrum of petroleum activities, including upstream exploration and production of oil and gas to downstream oil refining; marketing and distribution of petroleum products; trade; gas processing and liquefaction; operation of gas pipelines; marketing of liquefied natural gas; petrochemical manufacturing and marketing; shipping; automotive engineering; and investment properties.

Petronas become a major revenue source for the government of Malaysia. 45% of the government budget relies on dividends Petronas. The company is headquartered in the Petronas Twin Towers were officially opened on National Day of Malaysia to-42 dated August 31, 1998, anniversary of the company in conjunction with the 24th.