6) Mustafa Rahmi Koc – Net worth: $2.7 Billion

This 83 year old billionaire is the honorary chairman of Koc Holdings, one of the largest conglomerates in Turkey.

5) Semahat Sevim Arsel – Net worth: $2.8 Billion

This 85 year old billionaire is the richest woman in Turkey. She is a member of the board of directors of Koc Holding. She manages the group’s investments in the tourism sector.