Revenue: £221m (+19%)
Net profit margin: 7.7% Staff: 1,882
Despite its roots as a schools PC supplier, RM drew less than a third of revenues from its technology division in its year to 30 November 2018. Supplying over 8,000 schools and employing 800 staff, ‘RM Education' saw revenues slide four per cent to £67.6m due primarily to the planned contract completion of several long-term contracts. The wider group's 19 per cent revenue uplift was thanks primarily to its recent purchase of Australian assessment software provider SoNET.