Abdoola is the company's largest individual owner, with a 14-percent stake.
Shah owns a beneficial 10.98-percent stake in the company.
Thabet owns a majority stake in the company, worth $194.7 million.
Ibrahim is the chairman of Global Fleet Group, a floundering West African conglomerate.
The Saltzman family owns a beneficial 45.2-percent share in the healthcare company.
With a total private wealth of $651 billion, South Africa has more than twice as many billionaires as any other African country.
Dangote began the year as the 97th richest man in the world.
Access Holdings ranks as one of the most capitalized financial services institutions on the Nigerian Exchange.
Ovia owns a significant 16.2-percent stake in the company.
Calisto owns a majority 75-percent stake in the Singapore-based tech firm, which he founded in 2001.