13. boxxe

Revenue: £291.3m (+22%) 

Staff: 199

This York-based software licensing specialist has roughly doubled in size since Phil Doye acquired it in 2019, growing revenues by over a fifth in calendar 2021 on the back of strong managed services and consultancy sales. Targeting SMB and enterprise growth under Doye, boxxe bolstered its traditional public sector business in July 2022 when it bagged a £291m, three-year Microsoft deal with the MoD. The industry entrepreneur made a minority investment in 45^th-ranked Total Computers in November 2022.