Bekker owns a 0.86-percent stake in Amsterdam-based investment group, Prosus NV.
Rupert's equity stake in Richemont accounts for the majority of his $10.3-billion fortune.
In 2014, Wiese sold Pepkor to Steinhoff International in exchange for 20 percent of Steinhoff's issued shares.
The recent increase reduced his year-to-date wealth loss to $875 million.
Motsepe, who founded ARM in 1997 as South Africa's first Black-owned mining company, owns 39.7 percent of the company.
The majority of Oppenheimer's billion-dollar fortune stems from his private equity investments.
Premier Group operates under the banner of Brait SE.
Wiese owns 11.58 percent of the company, valued at over $860 million.
The group’s financial performance in the first half of 2023 builds on previous results.
Aspen Pharmacare Holdings Limited is a South African multinational pharmaceutical holding company.