by Doug Woodburn, IT Channel Oxygen

Who are the UK's largest IT resellers, MSPs and niche consultancies by revenue? That was the question we sought to answer late last year when we embarked on Oxygen 250.

After two months spent rifling through Companies House accounts, we are happy to bring you our findings.

IT Channel Oxygen registered members can view the top 100 profiles here or download the entire top 250 report – which was produced in association with Nebula Global Services – here.

Who are the Oxygen 250?

Between them, the Oxygen 250 racked up revenues/invoiced sales of £26.8bn in their latest years on record – a whopping 17.8% hike.

But who are they?

Like breeds of pedigree dogs, they have little in common at first glance – ranging as they do from high-end software consultancies to low-margin, high-volume e-tailers.

All, however, act as channel partners for IT manufacturers in the B2B space, reselling their hardware, software and cloud services and/or providing associated services around their propositions.

A few dedicate themselves to a single brand, while others have a particular focus on a single vertical market.

Most, however, would see themselves as vertical-agnostic, vendor-independent trusted advisors, guiding their SME, enterprise and public sector customers' technology choices and in some cases acting as their 'virtual CIO'.

Any vendor looking to boost their penetration of the UK market must consequently first win over these influential and highly skilled guardians of B2B tech spend, from £2bn-plus juggernauts like Computacenter and Softcat to the niche £16m-revenue outfits that tail the report.

While not exhaustive, Oxygen 250 is a fair reflection of the 250 largest revenue-reporting UK IT front-line channel partners on IT Channel Oxygen's radar. Please contact us at if you know of anyone we have missed off.

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