Rupert's investment firm, Remgro, owns 44.6 percent of Mediclinic, South Africa's largest hospital operator.
The billionaires have both played an important role in the country's economic growth.
Rautenbach owns a 0.023-percent stake in the banking group, worth $1.94 million.
The billionaire Sawiris family owns 51.8 percent of Orascom Construction.
NCBA Group is a Nairobi-based financial services conglomerate with subsidiaries in Tanzania, Rwanda, Uganda, and Cote d'Ivoire.
Rabiu and his son own 99.8 percent of the newly established food business.
TymeBank is owned in part by African Rainbow Capital Financial Services Holding, a Black-owned and -controlled company.
Abass founded Lami Technologies to democratize insurance products and services for low-income Africans.
The biggest challenges for family businesses in Africa have to do with the family system and not with the business system.
The increase in his net worth follows a $1-billion wealth loss in the first half of 2022.
