| Government Commercial AgencyNew | Other | 9 | £500m | 67.3% | 2026-03-20 |
| NHS London Procurement Partnership (Hosted by Guy's and St Thomas' NHS FT) | Other | 2 | £111m | 15.0% | 2021-11-01 |
| Crown Commercial Service | Other | 4 | £32m | 4.3% | 2026-03-20 |
| BBC (British Broadcasting Corporation) | Other | 4 | £23m | 3.0% | 2022-08-15 |
| NHS Shared Business Services Ltd (NHS SBS) | Other | 1 | £12m | 1.6% | 2021-07-07 |
| Espo | Other | 6 | £11m | 1.4% | 2023-01-12 |
| HealthTrust Europe LLP (HTE) acting as agent for the University Hospitals of Coventry and Warwickshire NHS Trust (“UHCW”) | Other | 1 | £7m | 0.9% | 2020-06-15 |
| Department for Work & Pensions | Other | 1 | £6m | 0.8% | 2022-10-10 |
| Foreign Commonwealth and Development Office | Other | 2 | £6m | 0.8% | 2022-06-23 |
| H M REVENUE & CUSTOMS | Other | 1 | £6m | 0.7% | 2022-06-27 |
| Ministry of Defence | Other | 2 | £5m | 0.6% | 2026-03-18 |
| United Lincolnshire Hospitals NHS Trust | Other | 4 | £4m | 0.6% | 2023-06-28 |
| DEPARTMENT FOR LEVELLING UP, HOUSING AND COMMUNITIES | Other | 1 | £2m | 0.3% | 2022-11-02 |
| Hertfordshire NHS Procurement | Other | 1 | £2m | 0.2% | 2021-07-19 |
| Lincolnshire County CouncilNew | Other | 1 | £2m | 0.2% | 2025-03-31 |
| County Durham and Darlington NHS Foundation Trust | Other | 3 | £2m | 0.2% | 2025-07-08 |
| Department for Education | Other | 1 | £2m | 0.2% | 2022-12-16 |
| London Borough of Hackney | Other | 1 | £921k | 0.1% | 2020-06-12 |
| Leeds Teaching Hospitals NHS Trust | Other | 1 | £834k | 0.1% | 2024-04-30 |
| Valuation Office Agency | Other | 1 | £770k | 0.1% | 2022-02-22 |
| SERIOUS FRAUD OFFICENew | Other | 1 | £750k | 0.1% | 2025-08-20 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 3 | £731k | 0.1% | 2020-09-28 |
| Walsall Healthcare NHS TrustNew | Other | 1 | £650k | 0.1% | 2025-08-18 |
| West Hertfordshire Hospitals NHS TrustNew | Other | 3 | £583k | 0.1% | 2025-05-28 |
| Leeds and York Partnership NHS Foundation Trust | Other | 1 | £540k | 0.1% | 2023-09-05 |
| Kent Community Health NHS Foundation Trust | Other | 1 | £515k | 0.1% | 2022-07-29 |
| Health & Safety ExecutiveNew | Other | 1 | £511k | 0.1% | 2025-10-21 |
| NHS Shared Business Services | Other | 1 | £456k | 0.1% | 2023-06-07 |
| Derbyshire County Council | Other | 2 | £430k | 0.1% | 2024-11-22 |
| Cambridgeshire County Council | Other | 1 | £400k | 0.1% | 2022-09-13 |
| Worcestershire Acute Hospital NHS TrustNew | Other | 1 | £358k | 0.0% | 2025-03-21 |
| Lincolnshire Partnership NHS Foundation Trust | Other | 1 | £347k | 0.0% | 2023-07-04 |
| Redcar and Cleveland Borough Council | Other | 4 | £340k | 0.0% | 2024-05-29 |
| Dorset County Hospital NHS Foundation Trust | Other | 1 | £335k | 0.0% | 2021-10-08 |
| Cornwall CouncilNew | Other | 1 | £325k | 0.0% | 2025-06-26 |
| Equality and Human Rights Commission | Other | 2 | £261k | 0.0% | 2025-01-08 |
| Competition and Markets Authority | Other | 2 | £251k | 0.0% | 2025-01-08 |
| MCA - Maritime and Coastguard Agency | Other | 3 | £250k | 0.0% | 2025-04-29 |
| NHS ResolutionNew | Other | 1 | £250k | 0.0% | 2024-11-28 |
| Royal Borough of Kingston Upon Thames | Other | 2 | £245k | 0.0% | 2024-07-31 |
| The Mayor and Commonalty and Citizens of the City of LondonNew | Other | 1 | £240k | 0.0% | 2026-01-31 |
| NHS England | Other | 2 | £232k | 0.0% | 2024-01-31 |
| Dorset HealthCare University NHS Foundation Trust | Other | 1 | £229k | 0.0% | 2019-11-05 |
| DERBY CITY COUNCIL | Other | 1 | £212k | 0.0% | 2019-12-18 |
| Peterborough City Council | Other | 3 | £181k | 0.0% | 2025-03-30 |
| UK Health Security Agency | Other | 2 | £133k | 0.0% | 2024-06-19 |
| DERBYSHIRE COMMUNITY HEALTH SERVICES NHS FOUNDATION TRUST | Other | 1 | £117k | 0.0% | 2023-08-24 |
| Public Health England | Other | 1 | £100k | 0.0% | 2018-01-09 |
| O F W A T | Other | 1 | £97k | 0.0% | 2023-10-28 |
| Pension Protection Fund | Other | 1 | £80k | 0.0% | 2023-02-14 |
| Nursing And Midwifery Council | Other | 1 | £66k | 0.0% | 2024-01-05 |
| The Water Services Regulation Authority | Other | 1 | £66k | 0.0% | 2019-05-08 |
| Leeds City Council | Other | 2 | £57k | 0.0% | 2024-07-19 |
| Sunderland City Council | Other | 1 | £37k | 0.0% | 2020-06-16 |
| Manchester City Council | Other | 2 | £31k | 0.0% | 2019-06-18 |
| General Dental Council | Other | 1 | £31k | 0.0% | 2022-03-31 |
| Cabinet Office | Other | 1 | £22k | 0.0% | 2023-03-21 |
| Office of Qualifications and Examinations Regulation (Ofqual) | Other | 1 | £21k | 0.0% | 2019-06-05 |
| THE PLUSS ORGANISATION CIC | Other | 1 | £21k | 0.0% | 2022-08-01 |
| Security Industry AuthorityNew | Other | 1 | £18k | 0.0% | 2025-11-10 |
| The National Archives | Other | 1 | £14k | 0.0% | 2023-10-03 |
| CENTRE FOR PROCESS INNOVATION LIMITED | Other | 1 | £0k | 0.0% | 2023-07-02 |
| Central London Community Healthcare NHS Trust | Other | 1 | £0k | 0.0% | |
| Leeds and York Partnership NHS Foundation Trust, trading as North of England NHS Commercial Procurement Collaborative ("NOE CPC") | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a KCS Procurement Services) | Other | 4 | £0k | 0.0% | |
| Hampshire and isle of Wight Healthcare NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Guy's and St Thomas' NHS Foundation Trust | Other | 2 | £0k | 0.0% | |
| HealthTrust Europe LLP (HTE) acting on behalf of | Other | 1 | £0k | 0.0% | |
| The Minister for the Cabinet Office acting through Crown Commercial Service | Other | 4 | £0k | 0.0% | |
| NHS London Procurement Partnership | Other | 1 | £0k | 0.0% | |
| Cambridgeshire Community Services NHS Trust | Other | 1 | £0k | 0.0% | |
| UK Research and Innovation | Other | 1 | £0k | 0.0% | |