77. Trams

Revenue: £56.1m (+39%)

Staff: 38

This London-based Apple and Quantum partner's top line rebounded strongly to £56.1m in calendar 2021, thanks in part to brisk demand for its in-house Apple device management service. Trams was acquired in 2021 by Franco-Belgian reseller giant Econocom, whose existing UK IT financing arm turned over £31.3m in 2021. The two UK subsidiaries were recently brought under the leadership of a new ‘country coordinator' in the shape of Ben Wylie. Globally, Econocom turns over €2.5bn.