OYAK Mersis Number
0645003428900012OYAK Member Communication Center
+90 312 415 6000OYAK Member Communication Center Fax
+90 312 434 1250Management
Human Resources and Sustainability
Member Services
Follow Us!
OYAK Mersis Number
0645003428900012OYAK Member Communication Center
+90 312 415 6000OYAK Member Communication Center Fax
+90 312 434 1250Management
Human Resources and Sustainability
Member Services
Follow Us!
Fields Of Activity
As of year-end 2025, OYAK operates in 24 countries, including Türkiye, through more than 140 companies across six continents. With over 38,000 employees, OYAK has a strong presence in a wide range of industries, from mining and metallurgy to automotive, logistics, chemicals and agriculture, and from energy and finance to food, cement, concrete and paper.