| UK Shared Business Services | Swindon | 27 | 1,344 |
| Newcastle University | Newcastle upon Tyne, Newcastle | 6 | 425 |
| Southern Universities Purchasing Consortium | Reading | 6 | 18 |
| Department for Education | London, Newcastle upon Tyne | 5 | 376 |
| NHS Shared Business Services | Salford | 4 | 294 |
| Department for Work & Pensions | Manchester, London, Blackpool | 4 | 282 |
| Derbyshire County Council | Matlock | 3 | 260 |
| Crown Commercial Service | Liverpool | 3 | 270 |
| Department for International Trade | London | 3 | 146 |
| Student Loans | Glasgow | 3 | 68 |
| Crescent Purchasing Consortium | Salford, Manchester | 3 | 62 |
| Housing 21 | Birmingham | 3 | 18 |
| Hillingdon Hospitals NHS Trust | Uxbridge | 3 | 10 |
| Department of Health & Social Care | Liverpool, London | 2 | 809 |
| MOD MOD | Liverpool, Andover | 2 | 709 |
| Durham County Council | Durham | 2 | 407 |
| Homes England the Name Adopted by the Homes & Communities Agency | Gateshead | 2 | 265 |
| Bournemouth Christchurch & Poole Council | Bournemouth | 2 | 193 |
| Kirklees Council | Huddersfield | 2 | 187 |
| YPO | Wakefield | 2 | 151 |
| Manchester City Council | Manchester | 2 | 141 |
| Ministry of Housing Communities & Local Government | St Leonards on Sea, London | 2 | 128 |
| NHS South Central & West CSU | Bristol, High Wycombe | 2 | 109 |
| MHRA Buyer Organisation | City, London | 2 | 54 |
| Greater Manchester Combined Authority Greater Manchester Police | Manchester | 2 | 33 |
| Lincoln University | Lincoln | 2 | 31 |
| Caerphilly County Borough Council | Hengoed | 2 | 33 |
| Tyne & Wear Fire & Rescue Service | Sunderland | 2 | 14 |
| British Transport Police | London | 2 | 5 |
| Atamis | London, Croydon | 2 | 2 |
| UK Research & Innovation Medical Reseach Council | Swindon | 2 | 2 |
| Bristol City Council | Gateshead | 1 | 563 |
| Ministry of Justice | London | 1 | 534 |
| London Borough of Merton | Morden | 1 | 504 |
| Public Health England | London | 1 | 477 |
| Sandwell Metropolitan Borough Council | Sandwell | 1 | 255 |
| Hampshire County Council | Winchester | 1 | 254 |
| CTM Portal for the Nda Shared Services Alliance | Thurso | 1 | 233 |
| City of London Corporation | London | 1 | 192 |
| Sunderland City Council | Sunderland | 1 | 196 |
| HM Land Registry | Plymouth | 1 | 148 |
| London Borough of Hackney | Hackney | 1 | 138 |
| Cambridgeshire County Council | Cambridge | 1 | 127 |
| Southampton University | Southampton | 1 | 112 |
| Driver & Vehicle Licensing Agency | Swansea | 1 | 111 |
| South Tyneside Council | South Shields | 1 | 114 |
| Southend on Sea Borough Council | Southend on Sea | 1 | 104 |
| Competition & Markets Authority | London | 1 | 99 |
| NHS Digital | Leeds | 1 | 82 |
| Bristol University | Bristol | 1 | 82 |
| Wyre Forest District Council | Kidderminster | 1 | 71 |
| NHS Supply Chain Operated by DHL Supply Chain | London | 1 | 49 |
| New City College | Tower Hamlets | 1 | 49 |
| NHS Supply Chain | London | 1 | 57 |
| NEL CSU | London | 1 | 50 |
| Financial Services Compensation Scheme | London | 1 | 39 |
| Nuclear Decommissioning Authority | Moor Row | 1 | 36 |
| National Procurement Service Welsh Government | Cardiff | 1 | 22 |
| NHS Property Services | London | 1 | 21 |
| Ofcom | London | 1 | 19 |
| Blood Services South West | Bristol | 1 | 19 |
| Calderdale & Huddersfield NHS Trust | Huddersfield | 1 | 17 |
| College of Policing | Coventry | 1 | 17 |
| Milton Keynes College | Milton Keynes | 1 | 17 |
| Dorset Health Care University NHS Trust | Buckinghamshire | 1 | 16 |
| London Universities Purchasing Consortium A | London | 1 | 21 |
| Sovini | Bootle | 1 | 13 |
| Dorset & Wiltshire Fire & Rescue Authority | Wiltshire | 1 | 12 |
| NHS North of England CSU | Durham | 1 | 6 |
| Darlington College | Darlington | 1 | 6 |
| Matravers School | Westbury | 1 | 5 |
| Police Fire & Crime Commissioner for Northamptonshire | Northampton | 1 | 1 |
| Hepcw | Cardiff | 1 | 1 |
| NHS Shared Business Services & North of England Commercial Procurement Collaborative | Salford and Sheffield | 1 | 1 |
| DFTC Department for Transport | London | 1 | 1 |
| Walsall Healthcare NHS Trust | Walsall | 1 | 1 |
| River Learning Trust | Oxford | 1 | 1 |