Turkish oil refiner Tupras ranked first on the Top 500 Turkish companies list again in 2010.
The ranking was announced by Istanbul's Chamber of Industry on Tuesday.
Tupras, 51 percent owned by Turkish conglomerate Koc Holding, has been ruling the ranking since 2005. Its sales reached 15.49 billion lira in 2009.
Turkish state power company EUAS, the only state company of the top 10 companies of the ranking, was the second on the list this year after total sales of 6.52 billion lira in 2009.
Oyak Renault, a joint venture of Turkey's Oyak and French carmaker Renault, ranked third with 2009 sales of 5.47 billion lira. Oyak Renault was also the top exporter of the country.
Household appliances producer Arcelik was the fourth this year, up from 7th place in 2009 ranking. Tofas, a joint venture of Italy's Fiat and Koc Holding, was on the fifth place.
Last year's third largest company carmaker Ford Otosan, another joint venture of Koc and Ford, dropped to sixth place this year.
Iron & steel producer Eregli Demir Celik, LNG distributor Aygaz, home appliances maker Vestel and Habas, producer of industrial and medical gases, followed in the top 10 part of the list.
According to the list, EUAS was the top industrial company to make biggest profit, 1.42 billion lira, in 2009 and Tupras was the second with a profit of 776.9 million lira.
Cigarette maker Philsa Philip Morris ranked the third with 673.9 million lira.
(1 U.S. dollar is equal to 1.51 lira).