Sulaiman bin Abdul Aziz Al Rajhi co-founded Al Rajhi Bank in 1957 with his three brothers. The bank has grown into one of largest Islamic banks in the world. The Al Rajhi family is considered to be among Saudi Arabia’s richest non-royal family. In 2011, Sulaiman bin Abdul Aziz Al Rajhi announced that he was donating most of his then $7.7 billion fortune to charity. So far, he has donated $5.7 billion.