Every year, the Istanbul Chamber of Industry lists the biggest 500 industrial companies of the country based on sales of products they manufacture. The latest such list, called the ISO-500, was released at the beginning of June.
In 2009, there were 153 foreign companies on the list, but in 2015 this number dropped to 125. This means that the proportion of foreign companies on the ISO-500 went down from one-third in 2009 to a quarter in 2015.