| NHS Shared Business Services Ltd (NHS SBS) | Other | 1 | £18m | 25.4% | 2020-08-10 |
| Scottish Fire and Rescue Service : Scottish Fire and Rescue Service | Other | 2 | £5m | 7.3% | 2019-10-03 |
| Driver and Vehicle Licensing Agency | Other | 6 | £3m | 4.0% | 2026-01-05 |
| Compass - Services to Improve Health and WellbeingNew | Other | 1 | £3m | 4.0% | 2025-08-29 |
| Crown Commercial Service | Other | 7 | £2m | 3.1% | 2020-01-16 |
| NHS Arden and Greater East Midlands Commissioning Support Unit | Other | 16 | £2m | 2.9% | 2026-03-17 |
| East Midlands Strategic Commercial Unit (EMSCU) | Other | 4 | £2m | 2.6% | 2018-01-22 |
| Activate Learning Education Trust | Other | 1 | £2m | 2.4% | 2023-02-22 |
| HM Land Registry | Other | 2 | £1m | 1.7% | 2020-08-28 |
| Merseytravel | Other | 2 | £1m | 1.7% | 2020-12-10 |
| DERBYSHIRE SUPPORT FACILITIES SERVICES | Other | 2 | £1m | 1.6% | 2021-07-01 |
| H M REVENUE & CUSTOMSNew | Other | 1 | £1m | 1.6% | 2024-10-22 |
| College of North West London | Other | 1 | £1m | 1.5% | 2018-10-24 |
| Norfolk and Norwich University Hospitals NHS Foundation Trust | Other | 3 | £1m | 1.5% | 2020-03-20 |
| Oxfordshire County Council | Other | 1 | £947k | 1.3% | 2023-12-01 |
| Stockport Metropolitan Borough CouncilNew | Other | 1 | £900k | 1.3% | 2025-05-01 |
| Walsall Healthcare NHS Trust | Other | 5 | £791k | 1.1% | 2024-10-18 |
| Derbyshire Support & Facilities Services (DSFS) | Other | 1 | £763k | 1.1% | 2021-06-29 |
| FCDO Services | Other | 9 | £720k | 1.0% | 2018-03-06 |
| NHS Arden & GEM CSU | Other | 4 | £718k | 1.0% | 2021-08-20 |
| Suffolk County Council | Other | 1 | £700k | 1.0% | 2016-02-23 |
| South Tyneside Council | Other | 3 | £699k | 1.0% | 2025-12-17 |
| Hampshire County CouncilNew | Other | 1 | £689k | 1.0% | 2025-04-10 |
| Gower College Swansea | Other | 1 | £663k | 0.9% | 2023-05-11 |
| Stockton Borough Council | Other | 2 | £637k | 0.9% | 2024-04-08 |
| Derbyshire Support and Facilities Services | Other | 1 | £610k | 0.9% | 2022-02-01 |
| NHS SOUTH, CENTRAL AND WEST COMMISSIONING SUPPORT UNIT | Other | 6 | £609k | 0.9% | 2023-03-30 |
| Derbyshire County Council | Other | 1 | £513k | 0.7% | 2019-12-11 |
| Milton Keynes Council Electronic Tendering Site | Other | 1 | £506k | 0.7% | |
| Middlesbrough Council | Other | 1 | £463k | 0.7% | 2017-06-16 |
| Redcar and Cleveland Borough Council | Other | 3 | £450k | 0.6% | 2019-07-16 |
| United Kingdom Research and Innovation | Other | 1 | £423k | 0.6% | 2021-03-31 |
| NHS Arden and GEM CSU | Other | 7 | £421k | 0.6% | 2023-01-05 |
| The University Of Kent | Other | 1 | £405k | 0.6% | 2019-01-14 |
| NHS EnglandNew | Other | 1 | £390k | 0.6% | 2026-03-16 |
| UNIVERSITY OF SHEFFIELDNew | Other | 1 | £388k | 0.6% | 2024-10-01 |
| Knowsley Council | Other | 1 | £372k | 0.5% | 2016-02-23 |
| Met Office | Other | 2 | £359k | 0.5% | 2017-08-31 |
| EAST MIDLANDS STRATEGIC COMMERCIAL UNIT | Other | 1 | £353k | 0.5% | 2018-10-10 |
| Canterbury City Council | Other | 1 | £346k | 0.5% | 2021-10-01 |
| Cleveland Police | Other | 1 | £340k | 0.5% | 2017-03-15 |
| Coventry City Council | Other | 1 | £338k | 0.5% | 2022-09-02 |
| Hertfordshire NHS Procurement | Other | 2 | £337k | 0.5% | 2018-12-04 |
| Medicines and Healthcare Products Regulatory Agency | Other | 2 | £322k | 0.5% | 2023-09-04 |
| UKHSA | Other | 1 | £319k | 0.5% | 2024-03-25 |
| UK Health Security Agency | Other | 3 | £317k | 0.5% | 2025-12-18 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 3 | £315k | 0.4% | 2019-07-18 |
| Maritime & Coastguard Agency | Other | 5 | £313k | 0.4% | 2019-01-23 |
| Newcastle University | Other | 3 | £303k | 0.4% | 2018-12-14 |
| University of Bath | Other | 2 | £302k | 0.4% | 2019-10-31 |
| Valuation Office Agency | Other | 5 | £301k | 0.4% | 2019-12-20 |
| whg | Other | 2 | £300k | 0.4% | 2025-04-22 |
| Derbyshire Support and Facilities Services Lts | Other | 1 | £285k | 0.4% | 2022-04-01 |
| UNIVERSITY OF GLOUCESTERSHIRENew | Other | 2 | £285k | 0.4% | 2024-11-25 |
| Lancaster and Morecambe College | Other | 1 | £285k | 0.4% | 2021-08-18 |
| British Transport Police | Other | 3 | £284k | 0.4% | 2025-12-04 |
| Trafford Council | Other | 1 | £276k | 0.4% | 2021-06-21 |
| Sunderland City Council | Other | 3 | £256k | 0.4% | 2024-12-16 |
| University of Central Lancashire | Other | 3 | £250k | 0.4% | 2023-01-13 |
| Coventry - Solihull - Warwickshire | Other | 2 | £242k | 0.3% | 2019-03-15 |
| CALDERDALE AND HUDDERSFIELD SOLUTIONS LTD | Other | 1 | £233k | 0.3% | 2022-06-02 |
| Kent Community Health NHS Foundation TrustNew | Other | 1 | £230k | 0.3% | 2025-03-10 |
| The National ArchivesNew | Other | 1 | £222k | 0.3% | 2025-07-17 |
| Office of Rail and Road | Other | 1 | £216k | 0.3% | 2022-09-15 |
| NORTHERN LINCOLNSHIRE AND GOOLE NHS FOUNDATION TRUST CHARITABLE FUNDS AND OTHER RELATED CHARITIES | Other | 1 | £215k | 0.3% | 2022-03-09 |
| Home Office | Other | 4 | £215k | 0.3% | 2022-08-18 |
| Warrington Borough Council | Other | 2 | £210k | 0.3% | 2022-10-18 |
| University of Worcester | Other | 1 | £204k | 0.3% | 2023-11-30 |
| NUCLEAR DECOMMISSIONING AUTHORITYNew | Other | 1 | £200k | 0.3% | 2025-01-07 |
| Petroc | Other | 1 | £189k | 0.3% | 2021-04-06 |
| Intellectual Property Office | Other | 1 | £182k | 0.3% | 2020-08-21 |
| Wealden District Council | Other | 1 | £178k | 0.3% | 2024-03-01 |
| NCG Corporation | Other | 1 | £170k | 0.2% | 2021-07-21 |
| The House of Lords | Other | 1 | £164k | 0.2% | 2020-01-17 |
| Blackpool Council | Other | 1 | £163k | 0.2% | 2022-01-25 |
| Bassetlaw District Council | Other | 1 | £161k | 0.2% | 2018-01-04 |
| TRINITY HOUSE | Other | 1 | £152k | 0.2% | 2022-07-15 |
| London Borough of Merton | Other | 1 | £150k | 0.2% | 2018-09-18 |
| Board of Trustees of the Royal Botanic Gardens Kew | Other | 1 | £140k | 0.2% | 2018-09-21 |
| University Of The West Of England | Other | 2 | £134k | 0.2% | 2021-03-14 |
| Bristol City Council | Other | 1 | £130k | 0.2% | 2019-02-25 |
| University of Bradford | Other | 1 | £120k | 0.2% | 2020-04-05 |
| Erewash Borough Council | Other | 1 | £120k | 0.2% | 2016-11-04 |
| East Midlands Ambulance Service NHS Trust | Other | 2 | £118k | 0.2% | 2019-10-10 |
| In-Tend e-Tendering | Other | 1 | £117k | 0.2% | 2024-02-01 |
| CRESCENT PURCHASING LIMITED | Other | 7 | £112k | 0.2% | 2021-05-28 |
| The Water Services Regulation Authority | Other | 2 | £107k | 0.2% | 2018-03-02 |
| Calderdale and Huddersfield NHS Foundation Trust | Other | 1 | £102k | 0.1% | 2021-11-15 |
| Leeds Arts University | Other | 2 | £102k | 0.1% | 2023-09-22 |
| Isle of Wight Council | Other | 1 | £100k | 0.1% | 2020-03-05 |
| NHS North of England CSU | Other | 2 | £92k | 0.1% | 2021-03-09 |
| Department for Work & Pensions | Other | 1 | £92k | 0.1% | 2020-03-10 |
| Public Health England | Other | 1 | £91k | 0.1% | 2019-06-01 |
| NHS Shared Business Services (SBS) | Other | 2 | £85k | 0.1% | 2020-03-13 |
| DEFRA | Other | 1 | £84k | 0.1% | 2018-10-01 |
| United Lincolnshire Hospitals NHS Trust | Other | 1 | £82k | 0.1% | 2020-09-11 |
| Tameside College | Other | 1 | £81k | 0.1% | 2019-10-10 |
| Bedfordshire Police | Other | 1 | £79k | 0.1% | 2016-11-07 |
| Weymouth & Portland Borough Council | Other | 1 | £62k | 0.1% | 2016-01-27 |
| NHS Shared Business ServicesNew | Other | 1 | £60k | 0.1% | 2024-08-21 |
| Wyre Council | Other | 1 | £58k | 0.1% | 2023-03-29 |
| Yeovil College | Other | 1 | £57k | 0.1% | 2019-07-18 |
| LEEDS TRINITY UNIVERSITY | Other | 1 | £51k | 0.1% | 2021-10-12 |
| STAR PROCUREMENT LIMITED | Other | 1 | £48k | 0.1% | 2023-06-23 |
| NOTTINGHAMSHIRE POLICE | Other | 1 | £43k | 0.1% | 2023-10-24 |
| Northumberland County CouncilNew | Other | 1 | £39k | 0.1% | 2025-08-08 |
| East Cambridgeshire District Council | Other | 1 | £36k | 0.1% | 2024-02-23 |
| Kent and Medway Mental Health NHS TrustNew | Other | 1 | £36k | 0.1% | 2025-10-15 |
| NHS Business Services Authority | Other | 1 | £35k | 0.0% | 2019-12-10 |
| Equality and Human Rights CommissionNew | Other | 1 | £35k | 0.0% | 2026-01-28 |
| Royal Botanic Gardens | Other | 1 | £32k | 0.0% | 2018-02-20 |
| West Hertfordshire Teaching Hospitals NHS Trust | Other | 1 | £30k | 0.0% | 2022-04-26 |
| West Suffolk NHS Foundation Trust | Other | 1 | £30k | 0.0% | 2024-03-15 |
| Manchester University NHS Foundation Trust | Other | 1 | £29k | 0.0% | 2022-02-28 |
| MHRA | Other | 1 | £29k | 0.0% | 2019-03-13 |
| NHS Arden & GEM CSU | Other | 1 | £26k | 0.0% | 2021-10-11 |
| THE UNIVERSITY OF BIRMINGHAM | Other | 1 | £26k | 0.0% | 2022-02-04 |
| NHS Mid & South Essex Integrated Care Board | Other | 1 | £24k | 0.0% | 2023-11-06 |
| Office for Students | Other | 1 | £12k | 0.0% | 2022-03-09 |
| Worcestershire County Council | Other | 1 | £9k | 0.0% | 2022-03-22 |
| HERTS FOR LEARNING LIMITEDNew | Other | 2 | £0k | 0.0% | 2026-03-18 |
| Hull CollegeNew | Other | 3 | £0k | 0.0% | 2026-03-17 |
| Newcastle City Council | Other | 1 | £0k | 0.0% | 2023-11-08 |
| Sunderland College | Other | 3 | £0k | 0.0% | 2023-04-27 |
| Activate Learning | Other | 2 | £0k | 0.0% | 2020-09-01 |
| The Windsor Forest Colleges Group | Other | 1 | £0k | 0.0% | 2019-09-09 |
| ST HELENS & KNOWSLEY TEACHING HOSPITALS NHS TRUST | Other | 2 | £0k | 0.0% | 2019-05-14 |
| Cherwell District & South Northamptonshire Council | Other | 1 | £0k | 0.0% | 2018-10-30 |
| North of England Commercial Procurement Collaborative (NOE CPC) | Other | 1 | £0k | 0.0% | 2018-08-08 |
| THE GUINNESS PARTNERSHIP LIMITED | Other | 1 | £0k | 0.0% | 2017-10-10 |
| Anglia Ruskin University | Other | 1 | £0k | 0.0% | 2017-06-16 |
| Education | Other | 4 | £0k | 0.0% | |
| Leeds and York Partnership NHS Foundation Trust, trading as North of England NHS Commercial Procurement Collaborative ("NOE CPC") | Other | 3 | £0k | 0.0% | |
| NHS Wales Shared Services Partnership (hosted by Velindre University NHS Trust) | Other | 1 | £0k | 0.0% | |
| NWUPC (North West Universities Purchasing Consortium) | Other | 6 | £0k | 0.0% | |
| JISC | Other | 2 | £0k | 0.0% | |
| Rochdale Borough Council | Other | 2 | £0k | 0.0% | |
| UK Atomic Energy Authority | Other | 1 | £0k | 0.0% | |
| DE MONTFORT UNIVERSITY | Other | 1 | £0k | 0.0% | |
| Public Sector | Other | 4 | £0k | 0.0% | |
| enFrame CIC | Other | 2 | £0k | 0.0% | |
| St Teilos CIW High School | Other | 1 | £0k | 0.0% | |
| Gillotts School | Other | 1 | £0k | 0.0% | |
| University of Portsmouth Higher Education Corporation | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 4 | £0k | 0.0% | |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITED | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a KCS) | Other | 3 | £0k | 0.0% | |