5 out of 10 largest companies are from Koç Group
According to the 2009 results of the annual 500 Largest Industrial Companies survey carried out by the Istanbul Chamber of Industry (ISO), 5 out of the top 10 companies are from the Koç Group: Tüpraş, Aygaz, Ford Otomotiv, Tofaş, Arçelik, Tat, Mogaz, Türk Traktör, Arçelik-LG, Otokar, Entek Elektrik, Demir Export and RMK Marine.