Toto and Susie Wolff
Motor sport, Motor racing
Rank 2017
Wolff, 45, runs and owns 30% of Mercedes-AMG Petronas, based in Brackley, Northamptonshire, which is aiming to win the Formula One constructors' championship in 2017 for a fourth successive time. Three-time world champion Lewis Hamilton (qv) is its leading driver. Vienna-born Wolff married Susie Stoddart, 34, from Oban, in 2011. Now retired, she was a test driver for the Williams F1 team. The couple live in Switzerland. Wolff still has stakes in a rally parts dealer and a sports management operation. Mercedes was valued by Forbes magazine at more than £470m in late 2015.