| NORTH WESTERN UNIVERSITIES PURCHASING CONSORTIUM LIMITED | Other | 1 | £21m | 45.0% | 2019-07-26 |
| NHS Shared Business Services Ltd (NHS SBS) | Other | 1 | £5m | 10.5% | 2020-11-16 |
| N H S Shared Business ServicesNew | Other | 1 | £5m | 9.6% | 2025-11-19 |
| East of England Collaborative Procurement Hub | Other | 1 | £3m | 7.0% | 2024-01-26 |
| Kent and Medway NHS and Social Care Partnership Trust | Other | 2 | £2m | 4.2% | 2023-06-22 |
| United Lincolnshire Hospitals NHS Trust | Other | 1 | £1m | 2.4% | 2023-03-29 |
| B3 Living | Other | 2 | £1m | 2.1% | 2022-02-22 |
| East Of England NHS Collaborative Hub | Other | 7 | £909k | 1.9% | 2019-11-18 |
| London Borough of Waltham Forest | Other | 1 | £600k | 1.3% | 2023-03-20 |
| Welland Procurement Unit | Other | 1 | £594k | 1.2% | 2023-03-17 |
| University of BedfordshireNew | Other | 2 | £504k | 1.1% | 2024-05-29 |
| Essex County CouncilNew | Other | 8 | £475k | 1.0% | 2025-11-24 |
| Colchester City CouncilNew | Other | 1 | £414k | 0.9% | 2025-03-26 |
| Northampton General Hospital NHS Trust | Other | 1 | £307k | 0.6% | 2024-03-01 |
| KETTERING GENERAL HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £307k | 0.6% | 2024-03-01 |
| Torus62 | Other | 1 | £306k | 0.6% | 2024-02-05 |
| Department for Education | Other | 3 | £275k | 0.6% | 2025-06-27 |
| Equality and Human Rights Commission | Other | 1 | £250k | 0.5% | 2021-11-10 |
| Staffordshire County Council | Other | 1 | £250k | 0.5% | 2017-10-17 |
| Birmingham & Solihull Mental Health Foundation Trust | Other | 1 | £244k | 0.5% | 2017-04-30 |
| University Hospitals Dorset NHS Foundation Trust | Other | 3 | £243k | 0.5% | 2023-01-04 |
| Cleveland Police | Other | 1 | £188k | 0.4% | 2017-04-05 |
| LIVIN HOUSING LIMITED | Other | 2 | £179k | 0.4% | 2023-11-22 |
| LIVESTOCK INFORMATION LIMITEDNew | Other | 1 | £177k | 0.4% | 2025-04-23 |
| Parliamentary and Health Service Ombudsman | Other | 1 | £160k | 0.3% | 2023-03-08 |
| Hertfordshire NHS Procurement | Other | 2 | £140k | 0.3% | 2021-04-01 |
| City of Wolverhampton College | Other | 2 | £139k | 0.3% | 2025-08-05 |
| Sussex Community NHS Foundation TrustNew | Other | 1 | £135k | 0.3% | 2024-08-16 |
| Westward Housing Group | Other | 1 | £123k | 0.3% | 2019-10-07 |
| Weston CollegeNew | Other | 1 | £122k | 0.3% | 2025-06-30 |
| Lewisham Homes | Other | 1 | £120k | 0.3% | 2019-03-04 |
| Southport College | Other | 2 | £105k | 0.2% | 2025-09-17 |
| South Yorkshire Fire & RescueNew | Other | 1 | £100k | 0.2% | 2025-04-28 |
| NPTC Group of Colleges | Other | 1 | £98k | 0.2% | 2023-09-05 |
| HIGHTOWN HOUSING ASSOCIATION LIMITED | Other | 1 | £95k | 0.2% | 2023-03-02 |
| NHS Resolution | Other | 1 | £95k | 0.2% | 2021-12-14 |
| Humberside Fire & Rescue ServiceNew | Other | 1 | £93k | 0.2% | 2024-11-29 |
| Wigan and Leigh College | Other | 1 | £79k | 0.2% | 2022-08-03 |
| Tees Valley Combined Authority | Other | 1 | £75k | 0.2% | 2023-06-06 |
| Cambridgeshire County Council | Other | 1 | £70k | 0.1% | 2023-09-14 |
| Exeter College | Other | 1 | £70k | 0.1% | 2022-11-28 |
| Bradford College | Other | 1 | £69k | 0.1% | 2022-05-05 |
| St Helens College | Other | 1 | £66k | 0.1% | 2023-04-04 |
| NHS Digital | Other | 1 | £62k | 0.1% | 2021-10-21 |
| Coleg y Cymoedd | Other | 1 | £60k | 0.1% | 2020-10-12 |
| Dorset County Hospital NHS Foundation Trust | Other | 1 | £59k | 0.1% | 2023-04-21 |
| The Pioneer Housing and Community Group Limited | Other | 1 | £54k | 0.1% | 2023-11-21 |
| Lichfield District Council | Other | 1 | £51k | 0.1% | 2021-07-27 |
| Architects Registration Board | Other | 1 | £51k | 0.1% | 2021-12-01 |
| South Staffordshire CollegeNew | Other | 1 | £50k | 0.1% | 2025-04-11 |
| Leeds Arts University | Other | 1 | £49k | 0.1% | 2022-07-05 |
| Brooklands Technical College | Other | 1 | £48k | 0.1% | 2021-08-11 |
| West Thames CollegeNew | Other | 1 | £42k | 0.1% | 2025-07-29 |
| ACIS Group Limited | Other | 1 | £42k | 0.1% | 2018-03-19 |
| North Lincolnshire Council | Other | 1 | £41k | 0.1% | 2020-06-24 |
| Milton Keynes College | Other | 1 | £39k | 0.1% | 2018-03-28 |
| NHS Arden and Greater East Midlands Commissioning Support Unit | Other | 1 | £35k | 0.1% | 2020-11-30 |
| Southern Health Nhs Foundation Trust General Fund | Other | 1 | £33k | 0.1% | 2020-04-03 |
| New City College | Other | 1 | £32k | 0.1% | 2022-04-29 |
| The Mercian TrustNew | Other | 1 | £30k | 0.1% | 2024-11-19 |
| Bath and Northeast Somerset, Swindon and Wiltshire STP | Other | 1 | £29k | 0.1% | 2022-03-31 |
| Cumbria Housing Partners | Other | 1 | £24k | 0.0% | 2019-02-21 |
| Laidlaw Schools Trust | Other | 1 | £23k | 0.0% | 2020-04-21 |
| MHRA | Other | 1 | £21k | 0.0% | 2019-10-30 |
| Hartpury College | Other | 1 | £18k | 0.0% | 2020-03-25 |
| Office Of The Children's Commissioner | Other | 1 | £17k | 0.0% | 2024-03-28 |
| Centre for Digital Public Services | Other | 1 | £16k | 0.0% | 2022-04-14 |
| CRESCENT PURCHASING LIMITED | Other | 2 | £0k | 0.0% | 2021-01-27 |
| Choice Housing Ireland LimitedNew | Other | 2 | £0k | 0.0% | 2026-02-18 |
| Procurement for HousingNew | Other | 1 | £0k | 0.0% | 2025-08-22 |
| Cambridge Regional College | Other | 1 | £0k | 0.0% | 2022-07-18 |
| Colchester Institute | Other | 1 | £0k | 0.0% | 2021-06-03 |
| Kirklees College | Other | 1 | £0k | 0.0% | 2019-08-01 |
| NOE CPC | Other | 1 | £0k | 0.0% | 2019-05-21 |
| Coventry - Solihull - Warwickshire | Other | 1 | £0k | 0.0% | 2018-01-22 |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITED | Other | 1 | £0k | 0.0% | |
| London Borough of Newham | Other | 1 | £0k | 0.0% | |
| Mid and South Essex NHS Foundation Trust | Other | 2 | £0k | 0.0% | |
| THE CAMBRIDGE HOUSING SOCIETY LTD | Other | 1 | £0k | 0.0% | |
| Red Kite Learning Trust | Other | 2 | £0k | 0.0% | |
| Eildon Housing Association | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a KCS Procurement Services) | Other | 2 | £0k | 0.0% | |
| Queens Cross Housing Association Ltd | Other | 1 | £0k | 0.0% | |
| ST BASILS | Other | 1 | £0k | 0.0% | |
| Public Sector | Other | 14 | £0k | 0.0% | |
| Langstane Housing Association | Other | 1 | £0k | 0.0% | |
| Police & Crime Commissioner for South Wales | Other | 1 | £0k | 0.0% | |
| Mid and South Essex Integrated Care Board | Other | 2 | £0k | 0.0% | |
| Southern Health NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Newark & Sherwood District Council | Other | 1 | £0k | 0.0% | |
| Arts Council Of Wales | Other | 1 | £0k | 0.0% | |
| Cardiff Metropolitan University | Other | 1 | £0k | 0.0% | |
| London Borough of Bromley | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 5 | £0k | 0.0% | |
| Adullam Homes Housing Association Limited | Other | 1 | £0k | 0.0% | |
| Ongo Homes Limited | Other | 1 | £0k | 0.0% | |
| NHS England | Other | 1 | £0k | 0.0% | |
| Department of Finance | Other | 2 | £0k | 0.0% | |