Revenue: £48.6m (+90%)
Net profit margin: 0.4% Staff: 20
One of only 39 UK Cisco Gold partners, IGX Global UK focuses on cloud computing, virtualisation, managed hosting, software development, mobile, systems, IP networking and billing solutions. Revenues for its year to 31 March 2018 almost doubled as it reversed a net loss of £242,000 the previous year to a net profit of £182,000. NASDAQ-listed parent ePlus Inc, which acquired IGX Global in 2015, has 1,500 staff and revenues of $1.37bn.