Türkiye Petrol Rafinerileri A.S., commonly known as Tupras, is Turkey's largest oil refining company and one of Europe's leading petroleum processors. Operating four strategically located refineries with combined annual crude oil processing capacity of approximately 30 million tons, Tupras produces a comprehensive range of petroleum products including gasoline, diesel, fuel oils, liquid petroleum gases, base oils, waxes, bitumen, and specialty chemicals. The company serves domestic and international markets across four continents through multiple business segments encompassing refining, electricity generation, petrochemical operations, and energy trading. Beyond core refining activities, Tupras operates subsidiary companies including Ditaş, Turkey's largest maritime tanker fleet operator, and Körfez Ulaştırma, the country's first private rail freight operator. The company also maintains significant stakes in retail fuel distribution through Opet and engages in technology ventures and renewable energy development. Founded in 1983 and headquartered in Istanbul, Tupras operates with modern environmental standards and is advancing sustainability initiatives focused on biofuels, zero-carbon electricity generation, and green hydrogen production as part of its strategic transformation toward becoming a leading carbon-neutral energy company.