Each year Istanbul Chamber of Commerce conduct a survey in order to determine Turkey’s largest 500 industrial companies. Turkey's top 500 industrial enterprises’ net sales from production increased by 34.5% in 2018 was determined as 878 billion TL. The increase in net sales was mainly driven by the price increases as well as the rise in foreign exchange rates, which increased export revenues. Share of ISO 500 financial expenses in operating profit; Increased from 49.8% in 2018 to 88.9%; industrial firms devoted almost all of 2018 profit to financial expenses. KOCAER Steel, which continues to climb to the top of the ISO 500 list every year and has the 103rd overall ranking according to 2018 data, took 96th place in the private sector rankings.