66. EOS IT Solutions

Revenue: £68.7m (+37.1%)

Staff: N/A

Going by the accounts of its EOS IT Management Solutions (UK) Ltd subsidiary, this family-run collaboration specialist turned over £68.7m in the UK in its year to 30 June 2022 – a sizeable jump from the year prior.

Its global presence is much broader, however, with over 1,000 staff dotted across its Northern Irish HQ, mainland Europe, the Americas and AsiaPac.

Counting Google, Meta and LinkedIn among its clients, the Cisco Gold partner claims to have deployed more than 100,000 VC-UC solutions globally.