10) Gus Attridge – Net Worth: $660 Million

The South African self-made millionaire is the deputy CEO of Aspen Pharmacare, the largest pharmaceutical manufacturer in Africa and world’s fifth largest generic drug maker.

9) Desmond Sacco – Net Worth: $680 Million

Desmond Sacco made huge part of his wealth through Assore Group, a mining company founded by his father Guido Sacco in 1928. The former billionaire and geologist joined the company in 1968 and became the chairman and managing director in 1992 after the retirement of his father.