4. Douw Steyn
Net Worth: £860m
Douw Gerbrand Steyn is a South African billionaire businessman, the founder of BGL Group, a UK-based insurance and financial services company, and the parent of Comparethemarket.com.
Steyn began his career as a quantity surveyor at Eskom Mega Watt Park.
Steyn founded BGL Group (which was founded as Budget Insurance Company in 1992), a UK-based insurance and financial services company, and the parent of Comparethemarket.com.