6) Abdullah Al Rajhi and family – Net worth: $2.6 Billion

Along with brothers Sulaiman, Mohammed and the late Saleh, Abdullah Al Rajhi founded Al Rajhi Bank more than half a century ago. With $74 billion in assets, it is one of the largest Islamic banks in the world. The family dominates the board of this publicly traded bank. He also owns a stake in Islamic banking powerhouse Al Baraka Banking Group. SEE ALSO – Official List: Top 10 richest countries in Africa 2015 – See which is #1 (+Photos)