| NHS SOUTH, CENTRAL AND WEST COMMISSIONING SUPPORT UNIT | Other | 7 | £31m | 17.6% | 2024-02-07 |
| Whittington Health NHS TrustNew | Other | 2 | £28m | 16.0% | 2025-03-17 |
| University Hospitals of North Midlands NHS Trust | Other | 1 | £23m | 13.1% | 2023-09-27 |
| NHS Supply Chain | Other | 2 | £19m | 11.1% | 2020-12-01 |
| ST HELENS & KNOWSLEY TEACHING HOSPITALS NHS TRUST | Other | 6 | £13m | 7.7% | 2021-03-26 |
| SUPPLY CHAIN COORDINATION LIMITEDNew | Other | 2 | £13m | 7.5% | 2025-06-25 |
| NHS London Procurement Partnership | Other | 2 | £12m | 6.7% | 2023-03-31 |
| GATESHEAD HEALTH N H S FOUNDATION TRUST | Other | 2 | £10m | 6.0% | 2025-03-10 |
| Royal Free London NHS Foundation Trust | Other | 1 | £4m | 2.0% | |
| University Hospitals Bristol and Weston NHS Foundation TrustNew | Other | 3 | £3m | 1.6% | 2025-05-31 |
| Walsall Healthcare NHS Trust | Other | 2 | £3m | 1.6% | 2025-05-16 |
| North Lincolnshire Council | Other | 1 | £3m | 1.5% | 2024-04-18 |
| DERBYSHIRE SUPPORT FACILITIES SERVICES | Other | 2 | £2m | 1.0% | 2020-08-14 |
| NOTTINGHAM UNIVERSITY HOSPITALS NHS TRUST | Other | 2 | £2m | 0.9% | 2022-03-24 |
| Barts Health NHS TrustNew | Other | 1 | £1m | 0.8% | 2025-07-08 |
| Cheshire West and Chester Council | Other | 1 | £1m | 0.7% | 2024-04-01 |
| Barking, Havering And Redbridge University Hospitals Nhs Trust Charity Fund | Other | 1 | £898k | 0.5% | 2020-03-27 |
| CHESHIRE EAST COUNCIL | Other | 3 | £666k | 0.4% | 2026-01-22 |
| Dorset County Hospital NHS Foundation Trust | Other | 2 | £606k | 0.3% | 2026-03-13 |
| East and North Hertfordshire NHS Trust | Other | 4 | £604k | 0.3% | 2025-11-13 |
| NHS EnglandNew | Other | 1 | £600k | 0.3% | 2025-03-28 |
| NORTH WEST AMBULANCE SERVICE NHS TRUSTNew | Other | 1 | £400k | 0.2% | 2025-12-19 |
| Partners Procurement Service (PPS)New | Other | 5 | £337k | 0.2% | 2025-10-23 |
| Barnsley Metropolitan Borough CouncilNew | Other | 1 | £322k | 0.2% | 2026-03-05 |
| Worcestershire Acute Hospitals NHS TrustNew | Other | 1 | £318k | 0.2% | 2025-11-26 |
| ST HELENS & KNOWSLEY TEACHING HOSPITALS NHS TRUST | Other | 1 | £311k | 0.2% | 2022-04-06 |
| County Durham and Darlington NHS Foundation TrustNew | Other | 2 | £309k | 0.2% | 2025-08-05 |
| United Lincolnshire Hospitals NHS TrustNew | Other | 1 | £300k | 0.2% | 2024-07-30 |
| London Ambulance Service NHS TrustNew | Other | 1 | £285k | 0.2% | 2025-03-28 |
| Aneurin Bevan University Health Board | Other | 2 | £271k | 0.2% | |
| East Sussex Healthcare NHS TrustNew | Other | 2 | £228k | 0.1% | 2026-03-18 |
| London Borough of HackneyNew | Other | 1 | £168k | 0.1% | 2024-07-29 |
| SOMERSET NHS FOUNDATION TRUSTNew | Other | 1 | £126k | 0.1% | 2025-11-11 |
| BELFAST HEALTH AND SOCIAL CARE TRUSTNew | Other | 3 | £110k | 0.1% | 2025-10-03 |
| Department for Education | Other | 1 | £89k | 0.1% | 2023-03-31 |
| Bradford Teaching Hospitals NHS Foundation TrustNew | Other | 1 | £73k | 0.0% | 2026-03-19 |
| Sussex Community NHS Foundation TrustNew | Other | 1 | £65k | 0.0% | 2024-09-24 |
| HULL ROYAL INFIRMARYNew | Other | 1 | £56k | 0.0% | 2025-02-21 |
| Hull University Teaching Hospitals NHS Trust | Other | 1 | £53k | 0.0% | 2024-03-22 |
| Devon County Council | Other | 1 | £34k | 0.0% | 2024-03-27 |
| UHSFTNew | Other | 1 | £31k | 0.0% | 2025-03-30 |
| UKHSA | Other | 1 | £16k | 0.0% | 2023-11-29 |
| Birmingham Women's and Children's NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| NHS Commissioning Board (acting through NHS South Central and West Commissioning Support Unit) | Other | 1 | £0k | 0.0% | |
| Business Services Organisation I T S | Other | 2 | £0k | 0.0% | |
| NHS Golden Jubilee | Other | 1 | £0k | 0.0% | |
| Guy's and St Thomas' NHS Foundation Trust | Other | 3 | £0k | 0.0% | |
| Warrington and Halton Teaching Hospitals NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| The Common Services Agency (more commonly known as NHS National Services Scotland) (NSS) | Other | 2 | £0k | 0.0% | |
| YORK AND SCARBOROUGH TEACHING HOSPITALS NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| The Mersey Docks and Harbour Company | Other | 1 | £0k | 0.0% | |