31. Storm Technologies

Revenues: £118.2m (+14%)

Staff: 171

Billing itself as one of the UK's "fastest-growing independent IT VARs", Watford-based Storm shook off pandemic-related issues in calendar 2021 as it returned to double digit growth. Net profits inched up from £2.1m to £2.2m. "Repowering" its "already successful" graduate programme was among the priorities cited in its strategic report. The HP, HPE, Dell, Cisco, Microsoft, Lenovo, Citrix and VMware partner recently switched its van fleet to hybrids and rolled out multiple charging points across its sites.