Revenue: £65.5m (+5%)
Net profit margin: 1% Staff: 343
This Cheltenham-based office supplies specialist saw revenues jump five per cent in its year to 31 January 2019 as it celebrated winning "a number of major key accounts". Its managed print and managed IT arms both saw revenues drop slightly, to £5.9m and £10.5m, respectively, however. Commercial employs a zero-waste policy and MD Simone Hindmarch recently said of any tech firm not innovating in sustainability that their "days are numbered".