34 CACI Limited

Part of $5bn-revenue US tech monster CACI International, CACI Limited bills itself as a marketing, technology and data specialist and claims it was BI vendor Qlik's largest UK partner in 2017. An 11 per cent revenue hike in its year to 30 June 2018 was driven primarily by three recent UK acquisitions, Kognitio, Mapmechanics and Spargonet Consulting, the latter of which specialises in app development, mobile technology and BI.