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Mike Danson
Media
Rank 2017
195
Worth
£655m
Rise/fall
£167m

Market researcher Datamonitor was founded by Danson, 54, from his London flat with a £5,000 investment in 1989 and after it sold in 2007 for £502m his proceeds and share sales came to £193m. In January 2016 his Progressive Digital Media operation acquired the London-based healthcare business information provider GlobalData, whose name it also adopted, for £66.5m. New Statesman owner Danson has a near-70% stake that is now worth £345m – up £167m. Other assets lift him to £655m.