64. Charterhouse

Revenue: £69.2m (+43%)

Staff: N/A

This year's list is characterised by big jumps in the medium tier and August Equity-backed Charterhouse is no exception. Its 43 per cent revenue spike was delivered off the back of the five acquisitions it made in 2021.

Charterhouse's DNA is in public sector contracts and it credits this for its organic growth in 2023.

In 2023, the MSP became Extreme Networks' most accredited UK partner, on course to do £10m in business with the networking vendor