| NHS Arden and Greater East Midlands Commissioning Support Unit | Other | 1 | £149m | 76.7% | 2020-11-20 |
| NHS SOUTH WEST COMMISSIONING SUPPORT | Other | 1 | £13m | 6.9% | 2019-10-31 |
| NHS Supply Chain | Other | 2 | £12m | 6.3% | 2021-11-30 |
| BANK OF ENGLAND | Other | 2 | £5m | 2.5% | 2024-02-23 |
| Guy's & St Thomas' NHS Foundation Trust | Other | 2 | £5m | 2.4% | 2020-09-08 |
| Ministry of Defence | Other | 3 | £3m | 1.4% | 2024-05-21 |
| Ministry of Defence, DIO, Defence Infrastructure Organisation (DIO) | Other | 2 | £2m | 1.0% | 2018-05-10 |
| Homes England (the name adopted by the Homes and Communities Agency) | Other | 3 | £1m | 0.7% | 2024-06-24 |
| Norfolk Community Health and Care | Other | 1 | £1m | 0.5% | 2020-07-01 |
| Financial Ombudsman Service | Other | 2 | £835k | 0.4% | 2024-08-19 |
| Ofgem | Other | 1 | £450k | 0.2% | 2018-01-08 |
| Regulator of Social Housing | Other | 2 | £370k | 0.2% | 2024-04-30 |
| Health Education England | Other | 2 | £300k | 0.2% | 2023-03-31 |
| Staffordshire Police | Other | 1 | £282k | 0.1% | 2017-10-18 |
| West Suffolk NHS Foundation TrustNew | Other | 1 | £253k | 0.1% | 2024-06-17 |
| Office for StudentsNew | Other | 4 | £224k | 0.1% | 2025-04-15 |
| UNIVERSITY HOSPITALS COVENTRY AND WARWICKSHIRE NHS TRUSTNew | Other | 1 | £200k | 0.1% | 2025-05-31 |
| Whittington Health NHS TrustNew | Other | 1 | £150k | 0.1% | 2026-03-06 |
| Doncaster Metropolitan Borough Council | Other | 1 | £40k | 0.0% | 2016-07-22 |
| YORK TEACHING HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | 2017-08-31 |
| MID CHESHIRE HOSPITALS NHS FOUNDATION TRUST | Other | 3 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| ASHFORD AND ST PETER'S HOSPITALS NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| NHS South West London Integrated Care Board | Other | 1 | £0k | 0.0% | |
| NHS Wales Shared Services Partnership (hosted by Velindre University NHS Trust) | Other | 9 | £0k | 0.0% | |
| NHS North East and North Cumbria Integrated Care Board | Other | 1 | £0k | 0.0% | |
| NORFOLK AND SUFFOLK NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| SOMERSET NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| Swansea bay University Health Board | Other | 1 | £0k | 0.0% | |
| Aneurin Bevan University Health Board | Other | 1 | £0k | 0.0% | |
| NHS Leicester, Leicestershire and Rutland ICB | Other | 1 | £0k | 0.0% | |
| NHS HUMBER AND NORTH YORKSHIRE INTEGRATED CARE BOARD | Other | 1 | £0k | 0.0% | |
| NHS GLOUCESTERSHIRE INTEGRATED CARE BOARD | Other | 2 | £0k | 0.0% | |
| NHS CHESHIRE AND MERSEYSIDE INTEGRATED CARE BOARD | Other | 2 | £0k | 0.0% | |
| NHS Supply Chain Operated by DHL Supply Chain Limited acting as agent of Supply Chain Coordination Ltd (SCCL) | Other | 2 | £0k | 0.0% | |
| The National Health Service Commissioning Board (which uses the operational name“NHSEngland”) | Other | 1 | £0k | 0.0% | |
| University Hospitals of Leicester NHS Trust | Other | 1 | £0k | 0.0% | |
| South Tees Hospitals NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Gloucestershire Hospitals NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Integrated Laboratory Solutions LLP | Other | 1 | £0k | 0.0% | |
| The Newcastle Upon Tyne Hospitals NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| NHS England | Other | 1 | £0k | 0.0% | |