| Department for Education | Other | 26 | £367m | 46.4% | 2025-04-24 |
| LHC | Other | 1 | £100m | 12.7% | 2017-05-23 |
| Leicestershire County Council, trading as ESPONew | Other | 4 | £83m | 10.6% | 2026-03-31 |
| Home Office | Other | 3 | £62m | 7.9% | 2023-09-01 |
| NHS Shared Business Services Ltd (NHS SBS) | Other | 1 | £53m | 6.8% | 2021-06-14 |
| Espo | Other | 7 | £29m | 3.7% | 2018-01-30 |
| NHS England | Other | 3 | £21m | 2.7% | 2022-03-15 |
| Crown Commercial Service | Other | 1 | £20m | 2.5% | 2020-04-02 |
| West Hertfordshire Teaching Hospitals NHS Trust | Other | 4 | £5m | 0.6% | 2026-03-26 |
| Ministry of Defence | Other | 2 | £4m | 0.5% | 2025-02-26 |
| Basildon and Thurrock University Hospitals NHS Foundation Trust | Other | 1 | £3m | 0.4% | 2019-06-27 |
| Ministry of Justice | Other | 2 | £3m | 0.4% | 2020-07-27 |
| Hampshire County Council | Other | 1 | £3m | 0.4% | 2016-07-15 |
| Leeds City Council | Other | 5 | £2m | 0.3% | 2025-04-30 |
| YPO | Other | 2 | £2m | 0.3% | 2020-03-06 |
| Plymouth City Council | Other | 2 | £2m | 0.3% | 2023-07-17 |
| University Hospitals of North Midlands NHS Trust | Other | 1 | £2m | 0.3% | 2022-08-10 |
| Scape Group Limited (trading as SCAPE) | Other | 6 | £2m | 0.3% | 2024-01-31 |
| LEEDS TRINITY UNIVERSITY | Other | 4 | £2m | 0.2% | 2025-09-01 |
| Sellafield Ltd | Other | 2 | £2m | 0.2% | 2023-01-11 |
| Northumberland County Council | Other | 2 | £2m | 0.2% | 2023-03-10 |
| Stockport Metropolitan Borough Council | Other | 1 | £1m | 0.2% | 2023-06-12 |
| London Borough of Barking and Dagenham | Other | 2 | £1m | 0.1% | 2024-05-14 |
| The Royal Parks LtdNew | Other | 1 | £971k | 0.1% | 2024-09-05 |
| Brighton and Hove City Council | Other | 1 | £821k | 0.1% | 2023-08-01 |
| Leicester City Council | Other | 2 | £801k | 0.1% | 2021-09-10 |
| City of Bradford Metropolitan District CouncilNew | Other | 3 | £800k | 0.1% | 2026-03-09 |
| London Borough Of Barking And Dagenham Careers ServiceNew | Other | 1 | £787k | 0.1% | 2025-01-08 |
| South Yorkshire Fire & Rescue Service | Other | 1 | £773k | 0.1% | 2019-06-28 |
| Kent County Council | Other | 2 | £728k | 0.1% | 2023-07-11 |
| Atomic Weapons Establishment | Other | 1 | £618k | 0.1% | 2024-02-28 |
| Stockton on Tees Borough CouncilNew | Other | 3 | £539k | 0.1% | 2025-08-22 |
| The City of Liverpool College | Other | 2 | £534k | 0.1% | |
| SOMERSET NHS FOUNDATION TRUSTNew | Other | 2 | £530k | 0.1% | 2024-07-09 |
| MCA - Maritime and Coastguard Agency | Other | 5 | £496k | 0.1% | 2021-09-13 |
| Nuclear Restoration Services Ltd | Other | 2 | £481k | 0.1% | |
| North Yorkshire County Council | Other | 1 | £425k | 0.1% | 2023-03-31 |
| London Borough of CamdenNew | Other | 2 | £400k | 0.1% | 2026-04-21 |
| NORTH TYNESIDE COUNCILNew | Other | 1 | £400k | 0.1% | 2025-03-19 |
| Torbay Council | Other | 1 | £400k | 0.1% | 2016-03-21 |
| West Sussex County Council | Other | 1 | £396k | 0.1% | 2021-06-11 |
| London Borough of Waltham Forest | Other | 1 | £392k | 0.0% | 2020-07-31 |
| NHS Property Services Limited | Other | 2 | £366k | 0.0% | 2023-10-01 |
| Wigan CouncilNew | Other | 1 | £365k | 0.0% | 2025-09-08 |
| Bradford Metropolitan District Council | Other | 2 | £335k | 0.0% | 2020-07-31 |
| Calderdale and Huddersfield NHS Foundation Trust | Other | 1 | £318k | 0.0% | 2021-08-16 |
| Prospere Learning Trust | Other | 1 | £305k | 0.0% | 2023-05-30 |
| Coventry City Council | Other | 4 | £285k | 0.0% | 2024-07-31 |
| Tees Valley Combined AuthorityNew | Other | 1 | £280k | 0.0% | 2025-05-07 |
| WAKEFIELD COUNCIL | Other | 1 | £237k | 0.0% | 2022-03-07 |
| WIRRAL UNIVERSITY TEACHING HOSPITAL NHS FOUNDATION TRUST | Other | 4 | £220k | 0.0% | 2021-11-15 |
| Buckinghamshire Council | Other | 5 | £211k | 0.0% | 2020-08-18 |
| UK Health Security AgencyNew | Other | 1 | £191k | 0.0% | 2025-02-06 |
| EAST CHESHIRE NHS TRUST | Other | 1 | £191k | 0.0% | 2022-12-01 |
| Stockton Borough CouncilNew | Other | 1 | £188k | 0.0% | 2024-07-17 |
| Norfolk and Norwich University Hospitals NHS Foundation Trust | Other | 1 | £170k | 0.0% | 2023-03-22 |
| UK RESEARCH & INNOVATION | Other | 2 | £166k | 0.0% | 2023-11-21 |
| Royal Berkshire Fire Authority | Other | 4 | £142k | 0.0% | 2024-03-28 |
| University of Plymouth | Other | 1 | £133k | 0.0% | 2017-06-15 |
| Cumberland Council | Other | 1 | £113k | 0.0% | 2023-06-07 |
| FCDO Services | Other | 5 | £105k | 0.0% | 2025-06-23 |
| Ashford Borough CouncilNew | Other | 1 | £105k | 0.0% | 2025-04-11 |
| West Northamptonshire CouncilNew | Other | 1 | £98k | 0.0% | 2024-07-01 |
| City of London Corporation | Other | 1 | £91k | 0.0% | 2021-03-01 |
| SE Shared Services | Other | 1 | £90k | 0.0% | 2019-09-01 |
| Lincolnshire County Council | Other | 1 | £90k | 0.0% | 2023-01-10 |
| Darlington Borough Council | Other | 1 | £83k | 0.0% | 2023-06-10 |
| Police, Fire & Crime Commissioner for StaffordshireNew | Other | 1 | £82k | 0.0% | 2026-03-31 |
| Thames Valley Police | Other | 1 | £79k | 0.0% | 2017-04-21 |
| United Lincolnshire Hospitals NHS Trust | Other | 1 | £78k | 0.0% | 2023-12-12 |
| Thurrock Council | Other | 1 | £77k | 0.0% | 2023-07-11 |
| Bristol City Council | Other | 1 | £75k | 0.0% | 2021-08-10 |
| Rochford District Council | Other | 1 | £69k | 0.0% | 2022-10-07 |
| London Borough of MertonNew | Other | 1 | £68k | 0.0% | 2025-02-19 |
| Thanet District Council | Other | 1 | £67k | 0.0% | 2021-03-05 |
| Staffordshire Police | Other | 2 | £67k | 0.0% | 2020-12-14 |
| Redcar and Cleveland Borough Council | Other | 1 | £66k | 0.0% | 2022-03-28 |
| Lancaster City Council | Other | 1 | £60k | 0.0% | 2023-06-07 |
| Portsmouth Hospitals University NHS Trust | Other | 1 | £59k | 0.0% | 2024-02-15 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 2 | £55k | 0.0% | 2023-03-28 |
| Civil Nuclear Police Authority (CNPA) / Civil Nuclear Constabulary (CNC)New | Other | 1 | £52k | 0.0% | 2025-12-19 |
| Defence Science and Technology Laboratory | Other | 2 | £30k | 0.0% | 2021-12-13 |
| County Durham and Darlington NHS Foundation Trust | Other | 1 | £29k | 0.0% | 2021-10-25 |
| Liverpool City Council | Other | 1 | £28k | 0.0% | 2022-01-24 |
| Cleveland Fire Authority | Other | 1 | £22k | 0.0% | 2019-07-10 |
| United Lincolnshire Hospital Trust | Other | 1 | £21k | 0.0% | 2023-12-01 |
| Yorkshire Purchasing OrganisationNew | Other | 28 | £0k | 0.0% | 2026-02-23 |
| Surrey County Council | Other | 2 | £0k | 0.0% | 2024-07-08 |
| Central Bedfordshire Council | Other | 2 | £0k | 0.0% | 2022-02-25 |
| LHC Procurement Group | Other | 5 | £0k | 0.0% | |
| LHC Procurement Group for the Welsh Procurement Alliance (WPA) | Other | 4 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 9 | £0k | 0.0% | |
| Kent County Council (t/a KCS) | Other | 2 | £0k | 0.0% | |
| Scottish Borders Council | Other | 1 | £0k | 0.0% | |
| NPL Management Limited | Other | 1 | £0k | 0.0% | |
| Cardiff Council | Other | 2 | £0k | 0.0% | |
| Police and Crime Commissioner for South Wales | Other | 1 | £0k | 0.0% | |
| LHC for the Welsh Procurement Alliance (WPA) | Other | 9 | £0k | 0.0% | |
| LHC for the Scottish Procurement Alliance (SPA) | Other | 11 | £0k | 0.0% | |
| COUNTESS OF CHESTER HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| Adur District Council | Other | 1 | £0k | 0.0% | |
| Hertfordshire County Council | Other | 1 | £0k | 0.0% | |