| West Hertfordshire Teaching Hospitals NHS Trust | Other | 1 | £200k | 10.0% | 2022-11-23 |
| United Lincolnshire Hospitals NHS Trust | Other | 1 | £199k | 9.9% | 2023-01-16 |
| Partners Procurement Service (PPS) | Other | 6 | £187k | 9.3% | 2026-02-20 |
| East and North Hertfordshire NHS Trust | Other | 2 | £144k | 7.2% | 2026-04-01 |
| East Suffolk and North Essex NHS FT | Other | 1 | £144k | 7.2% | 2023-03-02 |
| The Princess Alexandra Hospital NHS TrustNew | Other | 1 | £120k | 6.0% | 2026-04-01 |
| Dorset HealthCare University NHS Foundation TrustNew | Other | 1 | £105k | 5.2% | 2026-01-22 |
| Princess Alexandra Hospital NHS Trsut | Other | 1 | £90k | 4.5% | 2023-03-06 |
| County Durham and Darlington NHS Foundation Trust | Other | 2 | £89k | 4.5% | 2024-03-07 |
| Kent Community Health NHS Foundation TrustNew | Other | 1 | £80k | 4.0% | 2025-04-24 |
| Hull University Teaching Hospitals NHS Trust | Other | 2 | £74k | 3.7% | 2022-03-29 |
| West Suffolk NHS Foundation Trust | Other | 2 | £69k | 3.5% | 2026-02-25 |
| Manchester University NHS Foundation Trust | Other | 1 | £61k | 3.0% | 2021-11-29 |
| SOMERSET NHS FOUNDATION TRUSTNew | Other | 5 | £52k | 2.6% | 2025-10-22 |
| University Hospitals Birmingham NHS Foundation TrustNew | Other | 1 | £47k | 2.4% | 2025-06-12 |
| South Tees Hospitals NHS Foundation TrustNew | Other | 1 | £39k | 1.9% | 2025-01-01 |
| Hywel Dda University Health BoardNew | Other | 1 | £37k | 1.9% | 2025-11-26 |
| NHS Wales Shared Services Partnership (hosted by Velindre University NHS Trust) | Other | 1 | £37k | 1.9% | |
| Bradford Teaching Hospitals NHS Foundation Trust | Other | 2 | £37k | 1.8% | 2024-04-23 |
| Hull & East Yorkshire Hospitals Nhs Trust | Other | 2 | £33k | 1.6% | 2020-03-16 |
| DSFS c/o Chesterfield Royal Hospital | Other | 1 | £28k | 1.4% | 2022-06-30 |
| Norfolk and Norwich University Hospitals NHS Foundation Trust | Other | 1 | £26k | 1.3% | 2024-03-30 |
| Chesterfield Royal Hospital NHS Foundation Trust | Other | 1 | £26k | 1.3% | 2023-02-10 |
| Derbyshire Support and Facilities Services | Other | 1 | £24k | 1.2% | 2021-12-29 |
| DSFS | Other | 1 | £23k | 1.1% | 2022-01-14 |
| Partners Procurement ServiceNew | Other | 1 | £18k | 0.9% | 2025-11-20 |
| Bath and Northeast Somerset, Swindon and Wiltshire STP | Other | 1 | £14k | 0.7% | 2021-04-01 |
| COUNTESS OF CHESTER HOSPITAL NHS FOUNDATION TRUST | Other | 3 | £0k | 0.0% | 2021-10-12 |
| Royal Surrey County Hospital NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| WIRRAL UNIVERSITY TEACHING HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| MEDWAY NHS FOUNDATION TRUST | Other | 2 | £0k | 0.0% | |
| The Common Services Agency (more commonly known as NHS National Services Scotland) (NSS) | Other | 5 | £0k | 0.0% | |
| NHS Supply Chain | Other | 1 | £0k | 0.0% | |
| Betsi Cadwaladr University Health Board | Other | 2 | £0k | 0.0% | |
| Mid and South Essex NHS Foundation Trust | Other | 1 | £0k | 0.0% | |