44. ANS

Revenue: £92.1m (+69%)

Staff: 460

This Manchester-based public and private cloud outfit had a busy end to 2022, swapping CEOs in October and acquiring 60-employee Microsoft partner Preact out of administration on 23 December. The holding company that sits above the Inflexion Capital-backed company's two constituent businesses - UKFast and ANS - turned over £92.1m in calendar 2021. That figure includes just six months of trading from ANS (which turned over £54.4m the previous year).