Stephen Fitzpatrick
Belfast-born Fitzpatrick founded Ovo Energy in 2009, to take on the Big Six providers, offering an annual average saving of about £150. It has 680,000 customers — 2.5% of the domestic energy market — and employs 1,200 staff in Bristol and London. Fitzpatrick, 39, recently had to end his sponsorship of the Manor Marussia Formula One team.
