Operating four oil refineries with a total of 30 million tons annual crude oil processing capacity, Tüpraş is the first producer in Turkey’s refining sector and largest industrial enterprise of the country with its subsidiary in sea transportation, Ditaş, its subsidiary in railway transportation, KUAŞ (Körfez Ulaştırma A.Ş.) and affiliate in fuel oil distribution sector, Opet. 49% of its shares are traded in Istanbul Stock Exchange.

Tüpraş, Europe's 7th largest refining company, serves as an integrated oil company with both market share and corporate reliability as well as production complexes and partnerships.

Tüpraş, which supplies 45 types of petroleum products in Turkey, has direct sales to customers including automotive fuel, LPG, bunker fuel and mineral oil distribution firms licensed by EMRA (Energy Market Regulatory Authority), petrochemical industry, paint industry, General Directorate of Highways, Municipalities, and contractor firms authorized by these agencies and the Turkish Armed Forces. As part of Koç Holding, Tüpraş had an investment-oriented growth and realized investments worth of 6.5 billion dollars in the last 13 years, 6.0 billion dollars of which were allocated to refinery projects.