39. Node4

Revenue: £102.9m* (+84%)

Staff: 622

The contribution of August 2021 acquisition The NAV People helped this Derby-based cloud and co-location provider record an 84 per cent pro-rated revenue uptick in its elongated year to 31 March 2022. The Providence Equity-backed outfit has continued to snap up Microsoft partners since year end as it bets on a hybrid cloud future, gobbling Risual and Tisski in August and November, respectively. The NAV People contributed £27.6m to Node4 holding company Atten Group's £114.2m revenue tally in its fiscal 2022 (which covered 405 days).

*Annualised figure