Koç Holding A.Ş. is the largest industrial conglomerate in Turkey, and the only company in the country to be listed on the Fortune Global 500 as of 2023. The company, headquartered in Nakkaştepe, Istanbul, is controlled by the Koç family, one of Turkey's wealthiest families. The company was organised into its current form in 1963 when founder Vehbi Koç, who established his first firm in 1926, combined all the companies bearing his name into Koç Holding. Wikipedia