Revenue: £46.5m (+23%)
Net profit: -6.2% Staff: 224
Having made eight acquisitions under its previous PE backer, Arrow pledged in January 2020 to maintain its status as a "leading buy and build platform in ICT and energy services" as it bagged a £50m war chest from new ally MML. The Godalming-based Vodafone and Mitel partner saw revenues pogo 23 per cent to £46.5m in calendar 2019, with almost a third of the total generated by mobile. It has swallowed two businesses in 2020, namely security specialist Altinet and MSP Click Networks.