Revenue: £81.7m (+11%)
Net profit margin: 1.8% Staff: 208
This Staffordshire-based PC builder and reseller claimed that it entered 2019 "with momentum and confidence" after revenues rose 11 per cent and net profits more than doubled in calendar 2018 to £1.4m. In a move partly to support university customers with courses focused on gaming, public sector specialist Stone acquired gaming rig and custom PC supplier DinoPC this August. DinoPC founder Vladimir Kuzenetsov now heads up Stone's gaming arm.