| Ministry of Defence | Other | 71 | £34m | 41.1% | 2026-01-28 |
| H M REVENUE & CUSTOMS | Other | 5 | £10m | 12.0% | 2025-10-06 |
| National Highways | Other | 3 | £8m | 10.0% | 2023-08-25 |
| Crown Commercial Service | Other | 14 | £3m | 3.5% | 2026-02-09 |
| Home Office | Other | 12 | £3m | 3.5% | 2025-12-22 |
| NHS England | Other | 10 | £3m | 3.4% | 2026-01-27 |
| UK Health Security Agency | Other | 4 | £2m | 2.6% | 2025-11-26 |
| Department for Education | Other | 17 | £2m | 2.2% | 2025-09-26 |
| United Kingdom Atomic Energy Authority | Other | 2 | £2m | 2.1% | 2024-07-02 |
| Department for Work & Pensions | Other | 6 | £2m | 1.8% | 2024-03-25 |
| Driver and Vehicle Licensing Agency | Other | 14 | £1m | 1.5% | 2025-12-16 |
| Department of Health and Social Care (T&T) | Other | 1 | £1m | 1.2% | 2021-07-06 |
| North Yorkshire County Council | Other | 1 | £986k | 1.2% | 2024-01-29 |
| Met Office | Other | 6 | £796k | 0.9% | 2025-11-25 |
| Competition and Markets Authority | Other | 2 | £727k | 0.9% | 2025-03-19 |
| South West Police Procurement Service | Other | 1 | £700k | 0.8% | 2023-09-08 |
| Foreign Commonwealth and Development Office | Other | 3 | £688k | 0.8% | 2023-11-08 |
| NHS SOUTH, CENTRAL AND WEST COMMISSIONING SUPPORT UNIT | Other | 4 | £514k | 0.6% | 2026-03-19 |
| Southampton City CouncilNew | Other | 2 | £499k | 0.6% | 2024-08-09 |
| ATAMIS LTD | Other | 7 | £488k | 0.6% | 2022-01-31 |
| Defence Digital (ISG) | Other | 3 | £432k | 0.5% | 2021-05-24 |
| NHS Arden and Greater East Midlands Commissioning Support Unit | Other | 7 | £427k | 0.5% | 2026-02-03 |
| Office for National Statistics | Other | 13 | £418k | 0.5% | 2026-03-17 |
| UKHSANew | Other | 1 | £382k | 0.5% | 2025-08-29 |
| Army Home Command | Other | 1 | £378k | 0.5% | 2023-01-27 |
| Manchester University NHS Foundation Trust | Other | 3 | £371k | 0.4% | 2023-03-06 |
| Government Digital ServiceNew | Other | 1 | £370k | 0.4% | 2024-11-14 |
| STUDENT LOANS COMPANY LIMITEDNew | Other | 1 | £351k | 0.4% | 2026-03-13 |
| North East London NHS Foundation Trust | Other | 1 | £349k | 0.4% | 2023-02-10 |
| The Police and Crime Commissioner for NottinghamshireNew | Other | 1 | £344k | 0.4% | 2025-07-25 |
| Joint Procurement Service for Surrey and Sussex Police | Other | 1 | £253k | 0.3% | 2023-09-12 |
| MHRA | Other | 3 | £223k | 0.3% | 2020-12-04 |
| Northumbria PoliceNew | Other | 1 | £207k | 0.2% | 2025-12-23 |
| NHS Property Services Limited | Other | 1 | £199k | 0.2% | 2023-03-01 |
| MCA - Maritime and Coastguard Agency | Other | 4 | £190k | 0.2% | 2026-02-26 |
| Intellectual Property Office | Other | 4 | £156k | 0.2% | 2026-04-20 |
| University Hospitals Dorset NHS Foundation TrustNew | Other | 1 | £137k | 0.2% | 2024-10-18 |
| Defence Science and Technology LaboratoryNew | Other | 3 | £135k | 0.2% | 2026-03-03 |
| COLLEGE OF POLICING LIMITED | Other | 4 | £133k | 0.2% | 2026-01-13 |
| NHS Blood and Transplant (NHSBT)New | Other | 1 | £131k | 0.2% | 2025-10-24 |
| Companies HouseNew | Other | 2 | £131k | 0.2% | 2025-09-29 |
| NHS Digital | Other | 2 | £129k | 0.2% | 2021-08-06 |
| National Institute for Health and Care ExcellenceNew | Other | 1 | £118k | 0.1% | 2025-02-21 |
| Valuation Office Agency | Other | 1 | £103k | 0.1% | 2021-06-23 |
| Norfolk County Council | Other | 1 | £102k | 0.1% | 2022-05-18 |
| Norfolk Constabulary | Other | 1 | £97k | 0.1% | 2020-09-18 |
| DRIVER & VEHICLE LICENSING AGENCY | Other | 1 | £96k | 0.1% | 2021-04-15 |
| Cumberland CouncilNew | Other | 1 | £96k | 0.1% | 2024-09-27 |
| NHS EngalndNew | Other | 1 | £83k | 0.1% | 2024-11-05 |
| Air Command, RAF High Wycombe : Air Command, RAF High Wycombe | Other | 1 | £83k | 0.1% | 2021-03-15 |
| NHS Arden and GEM CSU | Other | 4 | £79k | 0.1% | 2022-09-29 |
| Student Loans Company | Other | 1 | £73k | 0.1% | 2023-06-14 |
| NHS Mid & South Essex ICBNew | Other | 1 | £65k | 0.1% | 2025-03-04 |
| NHS Arden & GEM CSU | Other | 1 | £53k | 0.1% | 2021-06-24 |
| Blood Services South West | Other | 1 | £51k | 0.1% | 2020-09-24 |
| Lincolnshire PoliceNew | Other | 2 | £48k | 0.1% | 2025-03-05 |
| Medicines and Healthcare Products Regulatory AgencyNew | Other | 2 | £42k | 0.0% | 2024-09-26 |
| Food Standards AgencyNew | Other | 1 | £39k | 0.0% | 2024-12-16 |
| Bournemouth and Poole CollegeNew | Other | 1 | £31k | 0.0% | 2025-12-08 |
| Defence Equipment and Support | Other | 1 | £28k | 0.0% | 2018-04-23 |
| Homes England (the name adopted by the Homes and Communities Agency) | Other | 1 | £12k | 0.0% | 2022-01-19 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 1 | £10k | 0.0% | 2024-02-02 |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITEDNew | Other | 2 | £0k | 0.0% | 2024-07-31 |
| ORDNANCE SURVEY LIMITED | Other | 1 | £0k | 0.0% | |
| Tyne and Wear Passenger Transport Executive T/A Nexus | Other | 1 | £0k | 0.0% | |
| Hampshire County Council | Other | 4 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 4 | £0k | 0.0% | |
| National Highways Limited | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a KCS) | Other | 3 | £0k | 0.0% | |