| Specialist Computer Centres | Birmingham, West Midlands | 5 | 122 |
| Oliver Wyman | London, Greater London | 4 | 8 |
| Softcat | Marlow | 11 | 176 |
| Deloitte | London | 9 | 122 |
| Phoenix Software | York | 6 | 93 |
| KPMG | The Embankment, London | 5 | 102 |
| Brightive | The Glades, Stoke on Trent | 4 | 4 |
| Accenture | Old Bailey, London | 2 | 30 |
| Carter Jonas | London, Birmingham | 2 | 21 |
| Kainos Software | Belfast, Upper Crescent Belfast | 2 | 16 |
| Leeds Beckett University | Portland Way Leeds, Leeds | 2 | 12 |
| Bytes Software Services | Leatherhead | 6 | 70 |
| Egton Medical Information Systems | Leeds | 4 | 8 |
| Software Box | York | 3 | 89 |
| Bates Office Services | Rochester | 3 | 20 |
| BJSS | Leeds | 2 | 23 |
| Nomensa | Bristol | 2 | 13 |
| Risual | Stafford | 2 | 10 |
| Cognizant Worldwide | London | 2 | 18 |
| BAE Systems Applied Intelligence | Guildford | 2 | 9 |
| National Centre for Social Research | | 2 | 7 |
| Hippo Digital | Leeds | 2 | 7 |
| DWF Law | Manchester | 2 | 4 |
| Professional Record Standards Body | Canterbury | 2 | 3 |
| Axiologik | Leeds | 2 | 2 |
| Converging Data | Leeds | 2 | 2 |
| Wearewiser | Bakers Yard London | 2 | 2 |
| Insight Direct | Uxbridge | 1 | 121 |
| XMA | Nottingham | 1 | 93 |
| Ernst & Young | More London Place London | 1 | 89 |
| PA Consulting Services | Westminster | 1 | 54 |
| British Telecommunications | Bournemouth, Christchurch and Poole | 1 | 26 |
| Total Gas & Power | London | 1 | 42 |
| IBM | Portsmouth | 1 | 34 |
| Capgemini | Forge End | 1 | 36 |
| Bloom Procurement Services | Tyne and Wear | 1 | 30 |
| Mckinsey | Museum St London | 1 | 37 |
| Edenred UK Group | London | 1 | 11 |
| CSC Computer Sciences | Hants | 1 | 22 |
| Mastek | Reading | 1 | 9 |
| Exponential E | London | 1 | 8 |
| Akhter Computers | Harlow | 1 | 15 |
| Fujitsu Services | Greater London | 1 | 12 |
| Boxxe | York | 1 | 7 |
| Teleperformance | Bristol, City of | 1 | 6 |
| Zoom Video Communications | San Jose | 1 | 4 |
| Attain Health Management Services | Gerrards Cross | 1 | 5 |
| NHS Shared Business Services | Wakefield | 1 | 5 |
| Estio Training | Leeds | 1 | 3 |
| Saville Group | York | 1 | 3 |
| Saxton Bampfylde | Savoy Street London | 1 | 3 |
| Answer Digital | Leeds | 1 | 4 |
| Ideagen Gael | East Kilbride | 1 | 3 |
| Integrated Care 24 | Ashford | 1 | 2 |
| Qualtrics LLC | Provo | 1 | 2 |
| SME Hci | Romford | 1 | 2 |
| We are Snook | Glasgow | 1 | 2 |
| Aire Logic | Leeds | 1 | 5 |
| Valiantys | London | 1 | 2 |
| Akamai Technologies | London | 1 | 1 |
| Algolia | Reading | 1 | 1 |
| Auk Supplies | Newton Abbot | 1 | 1 |
| Bearingpoint | London | 1 | 1 |
| Bloomreach | | 1 | 1 |
| Clearview Bis Web | Bicester | 1 | 1 |
| Cognizant Technology | | 1 | 1 |
| Daintta | London | 1 | 1 |
| Digital Health Intelligence | London | 1 | 1 |
| Enterprisedb | Bracknell | 1 | 1 |
| Hippo | Leeds | 1 | 1 |
| Issured | London | 1 | 1 |
| Kaplan Financial | London | 1 | 1 |
| Leaning Pool | Londonderry | 1 | 1 |
| Linked in | County Dublin | 1 | 1 |
| Liverpool University NHS Trust | Merseyside | 1 | 1 |
| Logicmonitor | Santa Barbara | 1 | 1 |
| Manifesto Digital | London | 1 | 1 |
| Matrix Booking | London | 1 | 1 |
| National Licensing Authority | London | 1 | 1 |
| Netacea | | 1 | 1 |
| Normally | London | 1 | 1 |
| Pearn Kandola Digital Solutions | Cherwell | 1 | 1 |
| Pricewaterhousecoopers LLP PWC | London | 1 | 1 |
| Qualitest Group | London | 1 | 1 |
| Redcentric Solutions | Harrogate | 1 | 1 |
| Route 101 | South Gloucestershire | 1 | 1 |
| Saxton Bamfylde | London | 1 | 1 |
| Sitemorse UK Sales | London | 1 | 1 |
| Its Software Systems | Kidderminster | 1 | 1 |
| Symbius Urban Works | High Wycombe | 1 | 1 |
| Thomson Reuters Legal | London | 1 | 1 |
| Woodward Associates | Windsor and Maidenhead | 1 | 1 |
| Workinconfidence | Reading | 1 | 1 |
| X Lab | Leeds | 1 | 1 |
| X Labs | Leeds | 1 | 1 |