The net worth of Saudi Arabia's richest person, Prince Alwaleed bin Talal Al Saud, has dropped to $15.2 billion, the lowest since Bloomberg began tracking him in 2012. His fortune had reached a record $36.1 billion in May 2014. Alwaleed’s most valuable asset is a 95% stake in Kingdom Holding, whose shares have dropped 70% since their 2014 peak.