47. Stone Group

Key points

Revenue: £73.6m (-13%)

Net profit: 0.9%

Staff: 197

This PC builder's decision to exit a lucrative Apple universities framework - citing a lack of opportunity to add value - fuelled a 13 per cent drop in revenues in its year to 31 December 2017. But a net loss of £1.2m in 2016 was reversed to a £642,000 profit this time. In May, Stone won a deal to supply Public Health England with 6,200 Toshiba and Lenovo devices.