8. Mike Teke
Net Worth: R682 million
While he was a youth, Mike Teke had no parents to cater for his needs. Consequently, his grandmother filled the void left by his parents and brought him up in a motherly manner. Mike Teke received great advice from his grandmother and always makes it known that her words had a hand in his success. Currently, he serves at Optimum Coal Holdings as the CEO with the net worth of R682 million.