Rihanna's success can be attributed to her flourishing cosmetics line, Fenty Beauty, her music career, and Savage X Fenty.
TymeBank is partly owned by Motsepe's African Rainbow Capital (ARC) Financial Services Holding.
Carry1st is a South African mobile gaming startup.
The Steward family has a net worth of $5.7 billion.
Wigwe owns a 4.51-percent stake in Access Holdings.
Dangote is set to become the first Black person in history to lay claim to a $30-billion fortune.
Smith is the founder of one of the biggest U.S. tech-focused private equity firms, Vista Equity Partners.
Dantata is the founder and chairman of MRS Holdings Company Limited.
Saad owns a significant 12.5-percent stake in Aspen Pharmacare Holdings.
Ovia owns a 16.2-percent stake in Zenith Bank.
