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50. IGX Global

Revenue: £89.5m (+48.3%)

Staff: N/A

ePlus-owned IGX Global is one of the fastest growing on this year's list, jumping from No. 80 last year with a near-50 per cent revenue hike.

Gross profit grew to £10.3m, while operating profit contracted nearly 55 per cent to £1.6m, due to investments back into the business.

A Cisco Gold partner, IGX Global also counts Arista, AWS, Check Point, Dell, HPE, Juniper and Pure Storage among its vendor allies. Global satellite provider Inmarsat, fintech outfit Worldpay and Booking.com are among the customers singing IGX's praises on its website.