5 WWT

Key points

Revenue: £610m (+9%)

Net profit: N/A Staff: N/A

Global revenues of $12bn make this US-headquartered Cisco, Dell and Palo Alto Networks partner the world's second largest reseller, behind only CDW.

Due to a lack of local accounts, we can only take a wild stab at the size of WWT's Canary Wharf-based UK and European operation, which it launched in 2012, but local sources have in the past pegged it at over £500m. The St Louis-based firm claims to be a "go-to technology integrator" for large institutions in verticals including finance, healthcare, manufacturing and retail on this side of the pond.

Glassdoor recently named WWT CEO James Kavanaugh among the top 10 highest-rated CEOs during COVID.