21. Jigsaw24

Revenue: £170.5m (+9%)

Staff: 321

The increasing penetration of Macs, iPads and iPhones in the workplace is playing into the hands of this Nottingham-based Apple partner, it said as it unveiled a nine per cent revenue hike for its year to 31 May 2022 (following 19 per cent growth in 2021). The influx of investment into the UK, TV and media industry fuelled "impressive growth" in this vertical in particular, the Alcuin Capitbal-backed outfit noted. Net profits doubled to £2.3m. In September 2022, Jigsaw24 unveiled plans to become net zero before 2040 as part of its inaugural sustainability charter.