| Ernst & Young | London, Southwark | 4 | 89 |
| Fivium | Charing Cross, Belfast, Westminster | 3 | 3 |
| XMA | Nottingham, Wilford Industrial Estate | 3 | 93 |
| Jigsaw Systems | Nottingham, High Church Street Nottingham | 3 | 3 |
| Deloitte | London | 2 | 122 |
| Ads Group | Farnborough, London | 2 | 2 |
| Commercial Horticulture Association | Brasted, Near Westerham | 2 | 2 |
| Mendel Verlag | Bochum, Northrine Westpahalia | 2 | 2 |
| British Fashion Council | London | 5 | 5 |
| Rethink Events | Brighton | 4 | 4 |
| Pricewaterhousecoopers | London | 3 | 75 |
| Childrens Media Conference | Sheffield | 3 | 3 |
| NHS Confederation | London | 3 | 3 |
| KPMG | London | 2 | 102 |
| Capita Business Services | London | 2 | 121 |
| Boston Consulting Group | London | 2 | 22 |
| Linkedin Ireland Unlimited | Dublin | 2 | 7 |
| Financial Times | London | 2 | 4 |
| Capita Resourcing | London | 2 | 3 |
| British Education Suppliers Association | London | 2 | 2 |
| Purdue University | West Lafayette | 2 | 2 |
| Insight Direct | Uxbridge | 1 | 121 |
| WSP | London | 1 | 132 |
| Specialist Computer Centres | Birmingham | 1 | 122 |
| Ipsos MORI | London | 1 | 55 |
| Vodafone | Newbury | 1 | 32 |
| Gartner | Egham | 1 | 26 |
| Bramble Hub | Albert Embankment | 1 | 18 |
| Market & Opinion Research | Greater London | 1 | 22 |
| Womble Bond Dickinson | Southwark | 1 | 13 |
| PWC | London | 1 | 11 |
| Kantar | London | 1 | 16 |
| Frontier Economics | London | 1 | 18 |
| Korn Ferry | London | 1 | 9 |
| Canon | Uxbridge | 1 | 9 |
| Allied Publicity Services Manchester | Greater Manchester | 1 | 9 |
| UCL Consultants | London | 1 | 8 |
| Flexiform Business Furniture | Bradford | 1 | 9 |
| Green Park Interim & Executive | London | 1 | 8 |
| Made TECH | London | 1 | 7 |
| Cips Corporate Services | Stamford | 1 | 7 |
| Nous Group | London | 1 | 6 |
| Cision Group | Greater London | 1 | 6 |
| Clifford Chance | London | 1 | 5 |
| Harrow Green | London | 1 | 5 |
| Hogan Lovells | Holborn Viaduct | 1 | 6 |
| Saxton Bampfylde Hever | London | 1 | 4 |
| Language Empire | Rochdale | 1 | 4 |
| Gwe Business West | Bristol | 1 | 5 |
| Board Intelligence | Westminster | 1 | 4 |
| ICF Consulting | London | 1 | 4 |
| CGI | London | 1 | 3 |
| Digi2Al | Hove | 1 | 3 |
| Diligent Boardbooks | London | 1 | 3 |
| National Institute of Economic & Social Research | London | 1 | 3 |
| Design 102 | London | 1 | 4 |
| Fieldfisher | London | 1 | 3 |
| Nowcomm | Derby | 1 | 3 |
| Be Applied | London | 1 | 2 |
| Beauhurst | London | 1 | 2 |
| Concentra Consulting | London | 1 | 2 |
| Frost & Sullivan | Oxford | 1 | 2 |
| Mekon | Sutton | 1 | 2 |
| Merkle UK Three | London | 1 | 2 |
| Qualtrics LLC | Provo | 1 | 2 |
| Refinitiv | Tower Hamlets | 1 | 2 |
| Warwick Economics Development | Birmingham | 1 | 2 |
| Zaizi | London | 1 | 2 |
| Prestige Network | Newbury | 1 | 2 |
| Wex Photo Video | Norwich | 1 | 5 |
| Enterprise Growth Solutions | Hatfield | 1 | 2 |
| Exemplas Trade Services | Hatfield | 1 | 2 |
| Moloney Search | London | 1 | 2 |
| North East Worldwide | Gateshead | 1 | 2 |
| London School of Economics | London | 1 | 3 |
| 3Ce Technologies | Quebec | 1 | 1 |
| Accipio | Islington | 1 | 1 |
| Advertising Week | New York County | 1 | 1 |
| Agribriefing | London | 1 | 1 |
| Animation | London | 1 | 1 |
| Audeliss | London | 1 | 1 |
| Avantgarde Gesellschaft FÜR Kommunikation MBH | München | 1 | 1 |
| Avantgarde Marketing | London | 1 | 1 |
| Beamans | Sittingbourne | 1 | 1 |
| Bima | London | 1 | 1 |
| Bluecube | Milton Keynes | 1 | 1 |
| BN Americas | Las Condes | 1 | 1 |
| Brand Finance | London | 1 | 1 |
| British Chambers of Commerce | London | 1 | 1 |
| British Interactive Marketing Association | London | 1 | 1 |
| British Slovenian Chamber of Commerce | Ljubljana Center | 1 | 1 |
| Bureau Van Dik | London | 1 | 1 |
| Business Link Japan | Corby | 1 | 1 |
| Cambridge Spark | Cambridge | 1 | 1 |
| Catalyst Fund | Somerville | 1 | 1 |
| Chamber Link | Manchester | 1 | 1 |
| Cirium | Sutton | 1 | 1 |
| Colt Technology Service | London | 1 | 1 |
| Control Risks | London | 1 | 1 |
| Crest | Brunel Way Slough | 1 | 1 |