| Government Commercial AgencyNew | Other | 63 | £2.5bn | 56.5% | 2025-09-22 |
| Ministry of Justice | Other | 16 | £391m | 8.8% | 2025-12-17 |
| Ministry of Defence | Other | 47 | £328m | 7.4% | 2026-04-25 |
| H M REVENUE & CUSTOMS | Other | 3 | £288m | 6.5% | 2025-10-10 |
| Home Office | Other | 5 | £162m | 3.7% | 2026-01-01 |
| Cabinet Office | Other | 4 | £148m | 3.3% | 2024-02-21 |
| The University of Nottingham | Other | 2 | £80m | 1.8% | 2022-01-05 |
| CPSNew | Other | 2 | £56m | 1.3% | 2024-10-31 |
| Ministry of Defence, Land Equipment, Armoured Vehicles Programmes - Artillery Systems Programme | Other | 4 | £51m | 1.2% | 2019-08-31 |
| NHS England | Other | 2 | £49m | 1.1% | 2025-07-09 |
| Crown Prosecution Service | Other | 3 | £47m | 1.1% | 2018-08-24 |
| NHS Digital | Other | 3 | £42m | 0.9% | 2022-06-01 |
| YPO | Other | 2 | £34m | 0.8% | 2020-09-18 |
| National Highways | Other | 7 | £31m | 0.7% | 2025-07-15 |
| Department for Work & Pensions | Other | 7 | £23m | 0.5% | 2025-04-17 |
| Mining Remediation AuthorityNew | Other | 2 | £20m | 0.4% | 2025-11-28 |
| Department for EducationNew | Other | 1 | £19m | 0.4% | 2025-06-04 |
| Police and Crime Commissioner for North Wales Police & North Wales Police | Other | 6 | £19m | 0.4% | 2022-10-31 |
| N H S Shared Business Services | Other | 2 | £13m | 0.3% | 2024-01-26 |
| Office for National Statistics | Other | 3 | £13m | 0.3% | 2026-02-17 |
| BANK OF ENGLANDNew | Other | 2 | £11m | 0.3% | 2025-10-20 |
| The Office for Standards in Education, Children's Services and SkillsNew | Other | 3 | £11m | 0.2% | 2026-02-04 |
| NHS Shared Business Services Ltd (NHS SBS) | Other | 1 | £10m | 0.2% | 2020-05-11 |
| Department of Health and Social Care (DHSC) | Other | 2 | £8m | 0.2% | 2015-06-30 |
| DIGITAL DEFENCE LIMITED | Other | 2 | £8m | 0.2% | 2023-04-02 |
| Nottinghamshire County Council | Other | 3 | £8m | 0.2% | 2025-08-15 |
| HM Revenue & Customs | Other | 4 | £8m | 0.2% | 2026-05-08 |
| Ofsted | Other | 10 | £7m | 0.2% | 2024-07-05 |
| DEFRA | Other | 4 | £5m | 0.1% | 2022-09-20 |
| SERIOUS FRAUD OFFICE | Other | 5 | £3m | 0.1% | 2023-07-21 |
| Crown Commercial Service | Other | 6 | £3m | 0.1% | 2025-12-05 |
| The Coal Authority | Other | 1 | £3m | 0.1% | 2023-05-18 |
| Business Energy and Industrial Strategy | Other | 3 | £3m | 0.1% | 2023-07-06 |
| HM Land Registry | Other | 1 | £3m | 0.1% | 2018-11-16 |
| Ministry of Defence, Information Systems and Services, Other | Other | 1 | £3m | 0.1% | 2016-04-21 |
| BBC (British Broadcasting Corporation) | Other | 3 | £2m | 0.1% | 2022-04-11 |
| ICS on behalf of DSIT and DESNZNew | Other | 1 | £2m | 0.0% | 2025-08-01 |
| Department of Health & Social Care | Other | 1 | £2m | 0.0% | 2023-06-30 |
| Valuation Office Agency | Other | 1 | £2m | 0.0% | 2021-05-05 |
| Taunton and Somerset NHS Foundation Trust | Other | 1 | £1m | 0.0% | 2018-06-28 |
| DfTc - Department for Transport | Other | 1 | £1m | 0.0% | 2021-02-22 |
| Department for Environment Food & Rural Affairs | Other | 4 | £1m | 0.0% | 2025-10-10 |
| Civil Nuclear Police Authority (CNPA) / Civil Nuclear Constabulary (CNC) | Other | 2 | £1m | 0.0% | 2025-08-13 |
| Office of Qualifications and Examinations Regulation (Ofqual) | Other | 2 | £960k | 0.0% | 2024-05-24 |
| Competition and Markets Authority | Other | 3 | £937k | 0.0% | 2024-03-28 |
| UK Health Security Agency | Other | 1 | £836k | 0.0% | 2023-08-11 |
| UK Hydrographic Office | Other | 3 | £814k | 0.0% | 2024-05-30 |
| Financial Conduct Authority | Other | 1 | £730k | 0.0% | 2022-10-06 |
| HM Treasury | Other | 2 | £700k | 0.0% | 2024-03-27 |
| Department for Business, Energy & Industrial Strategy | Other | 1 | £576k | 0.0% | 2022-05-22 |
| DEPARTMENT FOR LEVELLING UP, HOUSING AND COMMUNITIES | Other | 1 | £570k | 0.0% | 2022-11-24 |
| Met OfficeNew | Other | 1 | £489k | 0.0% | 2026-03-27 |
| West Midlands Combined AuthorityNew | Other | 1 | £375k | 0.0% | 2024-08-13 |
| MHRA | Other | 2 | £354k | 0.0% | 2022-11-27 |
| University of Bristol | Other | 3 | £242k | 0.0% | 2024-06-30 |
| Health Education and Improvement Wales | Other | 2 | £235k | 0.0% | |
| The National Archives | Other | 2 | £230k | 0.0% | 2024-04-30 |
| The Charity Commission For England And Wales | Other | 2 | £229k | 0.0% | 2024-10-30 |
| Parliamentary and Health Service OmbudsmanNew | Other | 1 | £197k | 0.0% | 2025-09-10 |
| University of Leeds | Other | 2 | £195k | 0.0% | 2022-05-11 |
| Regulator of Social HousingNew | Other | 1 | £180k | 0.0% | 2025-11-25 |
| Forestry England | Other | 1 | £175k | 0.0% | 2022-10-21 |
| Office for Environmental ProtectionNew | Other | 1 | £172k | 0.0% | 2024-09-12 |
| CENTRE FOR ENVIRONMENT, FISHERIES AND AQUACULTURE SCIENCE | Other | 2 | £162k | 0.0% | 2023-10-10 |
| Foreign Commonwealth and Development Office | Other | 2 | £154k | 0.0% | 2020-09-25 |
| Ofqual | Other | 1 | £110k | 0.0% | 2024-02-08 |
| MOD DE&S ISS CORSHAM | Other | 1 | £100k | 0.0% | 2017-02-07 |
| Government Digital Service | Other | 2 | £100k | 0.0% | 2017-10-04 |
| Leeds City Council | Other | 1 | £92k | 0.0% | 2022-08-02 |
| Norfolk Constabulary | Other | 1 | £79k | 0.0% | 2020-11-20 |
| Barnsley Metropolitan Borough Council | Other | 1 | £78k | 0.0% | 2018-06-30 |
| GREATER MANCHESTER EDUCATION TRUST | Other | 1 | £74k | 0.0% | 2022-10-08 |
| Department for International Trade | Other | 1 | £70k | 0.0% | 2019-11-04 |
| Artillery Systems Project Team | Other | 1 | £70k | 0.0% | 2019-09-10 |
| The Water Services Regulation Authority | Other | 1 | £63k | 0.0% | 2015-12-01 |
| NUCLEAR DECOMMISSIONING AUTHORITY | Other | 1 | £60k | 0.0% | 2019-10-29 |
| Intellectual Property Office | Other | 1 | £55k | 0.0% | 2022-08-22 |
| Department for Culture, Media and Sport | Other | 1 | £50k | 0.0% | 2015-11-01 |
| University Hospitals Birmingham NHS Foundation TrustNew | Other | 1 | £49k | 0.0% | 2025-07-02 |
| Ofgem | Other | 2 | £40k | 0.0% | 2020-03-27 |
| O F W A T | Other | 1 | £27k | 0.0% | 2022-11-24 |
| HER MAJESTYS LAND REGISTRY | Other | 1 | £23k | 0.0% | 2018-02-19 |
| Defence Science and Technology Laboratory | Other | 1 | £18k | 0.0% | 2022-10-19 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 1 | £16k | 0.0% | 2021-03-19 |
| Liverpool City Region Combined AuthorityNew | Other | 1 | £0k | 0.0% | 2025-01-14 |
| Scottish Hydro Electric Power Distribution PlcNew | Other | 4 | £0k | 0.0% | 2025-12-22 |
| Disclosure and Barring Service | Other | 1 | £0k | 0.0% | 2017-08-30 |
| Birmingham City Council | Other | 1 | £0k | 0.0% | 2017-05-23 |
| The Minister for the Cabinet Office acting through Crown Commercial Service | Other | 1 | £0k | 0.0% | |
| The Police and Crime Commissioner for Norfolk | Other | 1 | £0k | 0.0% | |
| Metropolitan Police Service | Other | 1 | £0k | 0.0% | |
| Northern Ireland Electricity Networks Limited | Other | 3 | £0k | 0.0% | |
| Mayor's Office for Policing And Crime | Other | 2 | £0k | 0.0% | |
| University of Dundee | Other | 1 | £0k | 0.0% | |
| Norfolk County Council | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a KCS Procurement Services) | Other | 1 | £0k | 0.0% | |
| UNITED UTILITIES WATER LIMITED | Other | 2 | £0k | 0.0% | |
| Scottish Government | Other | 1 | £0k | 0.0% | |
| Guy's and St Thomas' NHS Foundation Trust | Other | 3 | £0k | 0.0% | |
| Scotland Gas Networks (SGN) | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 2 | £0k | 0.0% | |
| NHS London Procurement Partnership | Other | 1 | £0k | 0.0% | |
| Forestry Commission | Other | 1 | £0k | 0.0% | |
| National Highways Limited | Other | 1 | £0k | 0.0% | |
| Board of Trustees of the Royal Botanic Gardens Kew | Other | 1 | £0k | 0.0% | |
| Coventry University | Other | 1 | £0k | 0.0% | |
| BLUELIGHT COMMERCIAL LIMITED | Other | 1 | £0k | 0.0% | |
| THAMES WATER UTILITIES LIMITED | Other | 1 | £0k | 0.0% | |
| Procurement for Housing | Other | 1 | £0k | 0.0% | |
| OAK NATIONAL ACADEMY LIMITED | Other | 1 | £0k | 0.0% | |