South African billionaire Johann Rupert’s investment vehicle, Remgro Ltd., is planning to sell its stake in the local unit of energy giant TotalEnergies, according to people familiar with the matter. Remgro’s 25% holding in the arm of the Paris-based company, which owns refining operations and gasoline stations in South Africa, has a book value of R2.5-billion, according to a 2021 results statement.