Koç Holding A.Ş. (Turkish pronunciation: [kotʃ]) is a Turkish multinational industrial conglomerate headquartered in Istanbul, Turkey. It operates as the country's largest company, and is listed on Fortune Global 500 as of 2024. Koç Holding's contributions make up to 7% of Turkey's overall exports. The company is controlled by the Koç family, one of Turkey's wealthiest families.
Founded in 1926 by Vehbi Koç, it is regarded as one of the pioneering actors in the industrialization of Turkey. Subsidiaries owned by Koç Holding engage in a variety of sectors, including banking, energy, automotive, household appliances, and defence.