Döktas Dökümcülük Ticaret ve Sanayi AS manufactures and trades iron and aluminum cast components for automotive, heavy trucks, agricultural machinery, construction machinery, and machine building industries. It operates through the following segments: Pig & Nodular Iron Foundry, Aluminium Foundry, and Wheel. The company was founded by Rahmi Mustafa Koc and Bernar Nahum on August 23, 1973 and is headquartered in Bursa, Turkey.