| Leicestershire County Council, trading as ESPONew | Other | 20 | £1.3bn | 52.6% | 2026-04-14 |
| Brent Council | Other | 1 | £273m | 11.5% | 2023-01-26 |
| Royal Borough of Kingston Upon ThamesNew | Other | 2 | £187m | 7.9% | 2024-09-16 |
| Staffordshire County Council | Other | 11 | £170m | 7.2% | 2025-09-01 |
| City of London Corporation | Other | 2 | £111m | 4.7% | 2023-07-31 |
| Isle of Wight CouncilNew | Other | 4 | £100m | 4.2% | 2025-12-18 |
| Watford Borough Council | Other | 1 | £59m | 2.5% | |
| Essex County Council | Other | 2 | £40m | 1.7% | 2017-10-25 |
| NHS Property Services Limited | Other | 2 | £24m | 1.0% | 2026-03-31 |
| N H S Shared Business Services | Other | 1 | £17m | 0.7% | 2023-11-07 |
| Ministry of Defence | Other | 2 | £16m | 0.7% | 2024-03-13 |
| Fusion21 Members Consortium | Other | 1 | £13m | 0.5% | 2021-02-19 |
| Department of Health & Social Care | Other | 1 | £12m | 0.5% | 2022-03-29 |
| London Borough of Tower Hamlets | Other | 1 | £10m | 0.4% | 2017-01-30 |
| LLWR | Other | 2 | £10m | 0.4% | 2023-12-21 |
| UK Health Security Agency | Other | 2 | £9m | 0.4% | 2022-12-30 |
| COUNTESS OF CHESTER HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £8m | 0.3% | 2021-06-15 |
| Warwickshire County Council | Other | 4 | £6m | 0.3% | 2023-03-15 |
| Kent County Council | Other | 4 | £6m | 0.2% | 2023-10-06 |
| Braintree District Council | Other | 1 | £5m | 0.2% | 2018-01-29 |
| NOE CPC | Other | 1 | £5m | 0.2% | 2017-02-20 |
| London Universities Purchasing Consortium | Other | 2 | £4m | 0.2% | 2023-06-13 |
| Worthing Borough CouncilNew | Other | 1 | £4m | 0.1% | 2026-01-06 |
| UNIVERSITY OF SHEFFIELD | Other | 3 | £3m | 0.1% | 2022-07-05 |
| International Nuclear Services LimitedNew | Other | 1 | £3m | 0.1% | 2024-07-05 |
| Yorkshire and Humber Police Procurement (Y&HPP) | Other | 1 | £3m | 0.1% | 2021-03-15 |
| South Yorkshire Police Headquarters | Other | 5 | £3m | 0.1% | 2025-07-31 |
| UNIVERSITY OF MANCHESTER | Other | 1 | £2m | 0.1% | 2018-10-08 |
| UK Atomic Energy AuthorityNew | Other | 2 | £2m | 0.1% | 2026-03-18 |
| Sheffield Teaching Hospitals NHS Foundation Trust | Other | 1 | £1m | 0.1% | 2022-10-10 |
| Transport for Wales Rail Limited (Utility Buyer)New | Other | 1 | £1m | 0.1% | 2025-10-01 |
| Espo | Other | 7 | £1m | 0.1% | 2017-11-28 |
| University of Chester | Other | 3 | £1m | 0.1% | 2023-12-05 |
| London Borough of Lambeth | Other | 1 | £1m | 0.0% | 2021-02-08 |
| Bournemouth Christchurch and Poole CouncilNew | Other | 2 | £1m | 0.0% | 2025-06-23 |
| 7 Forces Commercial ServicesNew | Other | 3 | £1m | 0.0% | 2025-09-22 |
| UNIVERSITY OF DERBY | Other | 2 | £1m | 0.0% | 2019-02-04 |
| Newcastle-under-Lyme Borough Council | Other | 2 | £1m | 0.0% | 2015-12-01 |
| Chesterfield Royal Hospital NHS Foundation Trust | Other | 1 | £1m | 0.0% | 2018-04-27 |
| Sheffield Hallam University | Other | 3 | £840k | 0.0% | 2020-04-14 |
| United Lincolnshire Teaching Hospitals NHS TrustNew | Other | 2 | £802k | 0.0% | 2025-11-04 |
| Greater Manchester Combined Authority - Greater Manchester Police | Other | 1 | £776k | 0.0% | 2023-08-16 |
| The Police and Crime Commissioner for Avon & SomerseNew | Other | 1 | £652k | 0.0% | 2025-10-01 |
| THE UNIVERSITY OF BIRMINGHAM | Other | 9 | £625k | 0.0% | 2025-12-08 |
| MSE Group | Other | 2 | £573k | 0.0% | 2022-03-14 |
| Ministry of Defence, IMOC, Defence Equipment Sales Authority (DESA) | Other | 1 | £565k | 0.0% | 2019-02-05 |
| Harper Adams UniversityNew | Other | 2 | £556k | 0.0% | 2025-05-07 |
| Shropshire Council | Other | 3 | £556k | 0.0% | 2021-10-19 |
| UNIVERSITY OF KEELE | Other | 1 | £554k | 0.0% | 2022-11-01 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 3 | £510k | 0.0% | 2021-12-14 |
| Coventry UniversityNew | Other | 2 | £496k | 0.0% | 2024-05-31 |
| London Ambulance Service NHS Trust | Other | 1 | £429k | 0.0% | 2021-08-25 |
| City University | Other | 1 | £360k | 0.0% | 2016-09-02 |
| SOUTH YORKSHIRE PASSENGER TRANSPORT EXECUTIVE | Other | 2 | £335k | 0.0% | 2021-07-31 |
| West Midlands Combined AuthorityNew | Other | 1 | £240k | 0.0% | 2024-12-24 |
| Sheffield Health & Social Care NHS Foundation Trust | Other | 1 | £210k | 0.0% | 2022-06-01 |
| Royal Berkshire Fire Authority | Other | 1 | £201k | 0.0% | 2021-04-05 |
| ASTON UNIVERSITYNew | Other | 2 | £197k | 0.0% | 2026-04-17 |
| LEEDS TRINITY UNIVERSITYNew | Other | 1 | £172k | 0.0% | 2024-10-08 |
| St Helens College | Other | 2 | £146k | 0.0% | 2022-12-07 |
| EAST MIDLANDS STRATEGIC COMMERCIAL UNIT | Other | 2 | £146k | 0.0% | 2017-04-30 |
| Nottinghamshire Police Force | Other | 2 | £146k | 0.0% | 2017-04-30 |
| National Museums On Merseyside | Other | 1 | £128k | 0.0% | 2017-11-30 |
| Darlington College | Other | 2 | £126k | 0.0% | 2024-06-27 |
| The Education Training Collective | Other | 1 | £121k | 0.0% | 2023-06-12 |
| UNIVERSITY OF EXETERNew | Other | 1 | £120k | 0.0% | 2026-03-13 |
| SWYFTNew | Other | 1 | £100k | 0.0% | 2025-04-01 |
| Construction Industry Training Board | Other | 1 | £85k | 0.0% | 2023-01-25 |
| SWYTNew | Other | 2 | £80k | 0.0% | 2025-04-01 |
| Somerset Council | Other | 2 | £75k | 0.0% | 2024-04-11 |
| Yeovil College | Other | 1 | £72k | 0.0% | 2022-12-20 |
| North Northamptonshire CouncilNew | Other | 1 | £69k | 0.0% | 2025-01-10 |
| rdash nhs foundation trust | Other | 1 | £65k | 0.0% | 2022-06-01 |
| FCDO Services | Other | 5 | £64k | 0.0% | 2021-06-21 |
| City of Wolverhampton College | Other | 2 | £58k | 0.0% | 2023-10-12 |
| United Kingdom Atomic Energy AuthorityNew | Other | 1 | £50k | 0.0% | 2024-12-09 |
| ST BARTHOLOMEW'S CE MULTI ACADEMY TRUST | Other | 1 | £48k | 0.0% | 2023-04-18 |
| New College DurhamNew | Other | 1 | £47k | 0.0% | 2025-11-24 |
| North Lincolnshire CouncilNew | Other | 1 | £46k | 0.0% | 2025-10-23 |
| SOMERSET NHS FOUNDATION TRUSTNew | Other | 2 | £44k | 0.0% | 2026-02-06 |
| Office for Students | Other | 1 | £25k | 0.0% | 2023-02-22 |
| Leeds Teaching Hospitals NHS TrustNew | Other | 1 | £11k | 0.0% | 2025-11-13 |
| Calderdale and Huddersfield NHS Foundation Trust | Other | 1 | £6k | 0.0% | 2021-11-01 |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITEDNew | Other | 8 | £0k | 0.0% | 2025-06-16 |
| SEVERN TRENT WATER LIMITEDNew | Other | 1 | £0k | 0.0% | 2026-03-19 |
| Rotherham Borough CouncilNew | Other | 1 | £0k | 0.0% | 2026-01-27 |
| NHDC - WasteNew | Other | 1 | £0k | 0.0% | 2025-05-02 |
| The College of West Anglia | Other | 1 | £0k | 0.0% | 2022-07-26 |
| Supply Hertfordshire | Other | 1 | £0k | 0.0% | 2019-02-22 |
| HE Portal | Other | 1 | £0k | 0.0% | 2018-07-31 |
| Leeds Beckett University | Other | 1 | £0k | 0.0% | 2016-10-03 |
| Simply Serve Ltd | Other | 2 | £0k | 0.0% | |
| Nottingham City Council | Other | 1 | £0k | 0.0% | |
| Grwp Llandrillo Menai | Other | 1 | £0k | 0.0% | |
| Westminster City Council | Other | 3 | £0k | 0.0% | |
| Northampton General Hospital NHS Trust | Other | 1 | £0k | 0.0% | |
| Nottinghamshire Healthcare NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 7 | £0k | 0.0% | |
| ST BARTHOLOMEW'S CE MULTI ACADEMY TRUST | Other | 1 | £0k | 0.0% | |
| Walsall Metropolitan Borough Council | Other | 1 | £0k | 0.0% | |
| LLW Repository Ltd t/a Nuclear Waste Services | Other | 1 | £0k | 0.0% | |
| British Film Institute | Other | 1 | £0k | 0.0% | |
| Hertfordshire County Council | Other | 2 | £0k | 0.0% | |
| Norfolk County Council | Other | 1 | £0k | 0.0% | |
| University Hospitals of Leicester NHS Trust | Other | 1 | £0k | 0.0% | |
| Dudley Metropolitan Borough Council | Other | 1 | £0k | 0.0% | |
| UNITED UTILITIES WATER LIMITED | Other | 1 | £0k | 0.0% | |
| East Sussex County Council | Other | 1 | £0k | 0.0% | |
| Leicester City Council | Other | 1 | £0k | 0.0% | |
| HORNCHURCH ACADEMY TRUST | Other | 1 | £0k | 0.0% | |
| Birmingham City Council | Other | 2 | £0k | 0.0% | |
| London Borough of Merton | Other | 1 | £0k | 0.0% | |
| London Borough of Brent | Other | 1 | £0k | 0.0% | |
| Bath and North East Somerset Council | Other | 1 | £0k | 0.0% | |
| East Midlands Ambulance Service NHS Trust | Other | 1 | £0k | 0.0% | |
| Salisbury NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| West Yorkshire Fire and Rescue Service | Other | 1 | £0k | 0.0% | |
| Sussex Community NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| The Mersey Docks and Harbour Company | Other | 1 | £0k | 0.0% | |
| Secretary of State for Health and Social Care acting as part of the Crown through UK Health Security Agency | Other | 1 | £0k | 0.0% | |