Mum of five Denise Coates is behind online gambling firm Bet365, one of Britain's biggest bookmakersÂ - and records show she earned a basic wage of Â£200Â million last year with a Â£45M dividend.
Intensely private Miss Coates, aged 50, runs the company with her brother John and owns just over a 50 per cent stake in the firm, reported the Sunday Times.
Her father Peter is chairman of Stoke City Football Club, which is owned by the Bet365 Group.
Bet365 employs around 3,000 people - including her own husband Richard Smith, who serves as group property director. The pair met at Sheffield University, where she earned a first class degree in econometrics in the 1980s.