Sir James Dyson unveiled plans last November to invest £1.5bn over four years in the research and development of 100 products. His decision came just two months after the inventor’s company, famous for its bagless vacuum cleaners, launched its first robotic version. In March this year Dyson took its first stake in an external business, investing $15m (£10m) in American battery technology start-up Sakti3. Max Conze, 45, is the company’s chief executive.

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Company details
Year2015
Rank38
CompanyDyson
ActivityAppliance manufacturer
LocationWiltshire
Sales £m1,276
Profit £m392
Year endDec 13
Principal shareholdersSir James Dyson and family (100%)
Staff4,442
Founded1993
Websitewww.dyson.com

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* Supplied by company † Annualised figure