Soname is a Nigerian gaming tycoon and chairman of Bet9ja.
Nassef Sawiris owns 28.97 percent of the multinational construction group, or 33,825,323 shares.
Motsepe is a member of the WEF Board of Trustees.
Kimani owns a 32.3-percent stake in Kenyan agricultural company.
Its total investment in the country is now $148.4 million.
Since 2000, millions of African children have benefited from better access to education.
Rupert's net worth fell by $896 million as a result of the 14 percent drop in Richemont shares on Friday.
Oppenheimer's net worth is estimated to be $8.55 billion as of press time.
Alakija is the owner of Famfa Oil.
The refinery project is still on track to be completed by 2023.