Simon Nixon
Internet, Property
Rank 2017
Nixon, 49, founded the Flintshire-based comparison site in 1999. He sold the last of his shares in the business in March, having netted more than £551m since its 2007 stock market debut. Nixon's property assets are worth more than £330m, his bond and stock market investments stand at £530m and his personal assets and cash add £250m. His Porsche 918 Spyder, one of only 918 built, his risen 35% in value in six months, he says. Based in Jersey, Nixon also has homes in Los Angeles, Mallorca and London.

A Life in the Day: Simon Nixon