| Ministry of Justice | Other | 10 | £596m | 54.1% | 2025-12-15 |
| Care Quality Commission | Other | 17 | £55m | 5.0% | 2025-03-28 |
| Crown Commercial Service | Other | 6 | £35m | 3.2% | 2023-04-06 |
| UKHSA | Other | 2 | £35m | 3.2% | 2026-03-26 |
| NHS Business Services Authority | Other | 6 | £31m | 2.8% | 2026-01-05 |
| CPS | Other | 3 | £30m | 2.8% | 2025-10-01 |
| NHS Shared Business Services Ltd (NHS SBS) | Other | 2 | £28m | 2.5% | 2020-08-10 |
| NHS England (previously NHS Digital)New | Other | 1 | £25m | 2.3% | 2024-07-02 |
| UK Health Security Agency | Other | 12 | £15m | 1.4% | 2025-05-12 |
| National Health Service Commissioning Board (known as NHS England ) | Other | 1 | £11m | 1.0% | 2022-07-07 |
| West Northamptonshire Council | Other | 4 | £11m | 1.0% | 2025-06-17 |
| Leicestershire County Council | Other | 8 | £10m | 1.0% | 2022-11-23 |
| Cabinet Office | Other | 9 | £10m | 0.9% | 2023-08-24 |
| Medicines and Healthcare Products Regulatory Agency | Other | 6 | £10m | 0.9% | 2022-01-24 |
| HS2 | Other | 2 | £9m | 0.9% | 2020-06-26 |
| Blood Services South West | Other | 8 | £9m | 0.8% | 2022-07-29 |
| Crown Prosecution Service | Other | 1 | £9m | 0.8% | 2019-09-04 |
| Department of Health and Social Care (DHSC) | Other | 7 | £8m | 0.8% | 2026-04-01 |
| NHS Blood and Transplant (NHSBT) | Other | 3 | £7m | 0.6% | 2023-03-09 |
| Department of Health and Social Care (T&T) | Other | 2 | £7m | 0.6% | 2021-08-02 |
| NHS England & Improvement | Other | 1 | £7m | 0.6% | 2021-06-16 |
| Department of Health & Social Care | Other | 6 | £6m | 0.6% | 2021-12-01 |
| Manchester City Council | Other | 3 | £6m | 0.6% | 2023-10-31 |
| London Borough of Camden | Other | 2 | £6m | 0.5% | 2024-04-17 |
| Department of Health and Social Care (T&T) | Other | 7 | £6m | 0.5% | 2021-04-26 |
| Public Health England | Other | 3 | £6m | 0.5% | 2021-06-04 |
| Home Office | Other | 3 | £6m | 0.5% | 2019-05-24 |
| capitalEsourcing | Other | 1 | £5m | 0.5% | 2018-05-31 |
| Department for Work & Pensions | Other | 2 | £5m | 0.5% | 2025-12-23 |
| Health Education England | Other | 5 | £5m | 0.4% | 2022-04-01 |
| Gateshead Council | Other | 3 | £5m | 0.4% | 2022-09-05 |
| YPO | Other | 2 | £4m | 0.4% | 2023-12-19 |
| South Tyneside Council | Other | 4 | £4m | 0.4% | 2024-07-01 |
| Frimley Health NHS Foundation Trust | Other | 4 | £3m | 0.3% | 2025-12-28 |
| Hull University Teaching Hospitals NHS Trust | Other | 15 | £3m | 0.3% | 2022-11-09 |
| High Speed Two (HS2) Limited | Other | 1 | £3m | 0.3% | 2017-06-27 |
| South of England Procurement Centre | Other | 2 | £3m | 0.3% | 2024-09-09 |
| Shropshire Council | Other | 1 | £3m | 0.3% | 2019-02-01 |
| Student Loans Company | Other | 4 | £3m | 0.2% | 2020-03-09 |
| Northampton General Hospital NHS Trust | Other | 1 | £3m | 0.2% | 2024-01-31 |
| TEES ESK & WEAR VALLEYS NHS TRUST | Other | 1 | £3m | 0.2% | 2024-01-29 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 19 | £2m | 0.2% | 2025-12-17 |
| Northumbria Healthcare NHS Foundation Trust | Other | 2 | £2m | 0.2% | 2023-12-11 |
| North East Lincolnshire Council | Other | 1 | £2m | 0.2% | 2015-12-15 |
| County Durham and Darlington NHS Foundation Trust | Other | 2 | £2m | 0.2% | 2021-12-14 |
| ASTON UNIVERSITYNew | Other | 2 | £2m | 0.2% | 2024-09-30 |
| NHS Arden and Greater East Midlands Commissioning Support UnitNew | Other | 2 | £2m | 0.2% | 2024-06-28 |
| DIGITAL DEFENCE LIMITEDNew | Other | 1 | £2m | 0.2% | 2025-02-13 |
| West Sussex County Council | Other | 8 | £2m | 0.2% | 2026-05-05 |
| Surrey and Borders Partnership NHS FTNew | Other | 1 | £2m | 0.2% | 2026-01-02 |
| NHS Resolution | Other | 7 | £2m | 0.2% | 2025-03-11 |
| Surrey and Borders Partnership NHS Foundation TrustNew | Other | 1 | £2m | 0.2% | 2026-03-30 |
| Merseytravel | Other | 3 | £2m | 0.1% | 2020-09-30 |
| City of Doncaster Council | Other | 14 | £1m | 0.1% | 2025-07-21 |
| National Institute for Health and Care Excellence | Other | 3 | £1m | 0.1% | 2024-12-16 |
| NHS England | Other | 7 | £1m | 0.1% | 2025-11-27 |
| United Lincolnshire Hospitals NHS Trust | Other | 9 | £1m | 0.1% | 2024-05-03 |
| Royal Air Force (RAF) - Headquarters : Ministry of Defence | Other | 1 | £1m | 0.1% | 2019-03-31 |
| Liverpool University Hospitals NHS Foundation Trust | Other | 1 | £1m | 0.1% | 2022-04-04 |
| The Queen Elizabeth Hospital King's Lynn NHS Foundation Trust | Other | 7 | £1m | 0.1% | 2021-05-27 |
| Knowsley Council | Other | 1 | £1m | 0.1% | 2019-06-18 |
| Nuneaton & Bedworth Borough CouncilNew | Other | 1 | £1m | 0.1% | 2025-08-06 |
| DHSC - PPE | Other | 1 | £1m | 0.1% | 2024-04-08 |
| Crawley Borough Council | Other | 3 | £998k | 0.1% | 2025-02-25 |
| GENOMICS ENGLAND LIMITEDNew | Other | 3 | £989k | 0.1% | 2025-04-22 |
| The Insolvency Service | Other | 4 | £895k | 0.1% | 2024-04-18 |
| Hampshire County Council | Other | 3 | £893k | 0.1% | 2024-06-28 |
| DEPARTMENT FOR INTERNATIONAL DEVELOPMENT | Other | 1 | £883k | 0.1% | 2018-03-30 |
| Department for Education | Other | 2 | £762k | 0.1% | 2017-03-01 |
| London Ambulance Service NHS Trust | Other | 1 | £664k | 0.1% | 2024-05-22 |
| Office of Rail and Road | Other | 1 | £655k | 0.1% | 2023-06-30 |
| SERIOUS FRAUD OFFICE | Other | 2 | £617k | 0.1% | 2026-03-31 |
| Southampton City Council | Other | 4 | £593k | 0.1% | 2025-08-07 |
| Health Research Authority | Other | 2 | £552k | 0.1% | 2022-05-09 |
| East and North Hertfordshire NHS TrustNew | Other | 3 | £522k | 0.0% | 2026-01-28 |
| United Lincolnshire Teaching Hospitals NHS TrustNew | Other | 4 | £520k | 0.0% | 2026-04-05 |
| Doncaster MBC | Other | 3 | £497k | 0.0% | 2021-01-19 |
| N H S Shared Business ServicesNew | Other | 2 | £489k | 0.0% | 2025-03-28 |
| NHS Property Services Limited | Other | 2 | £475k | 0.0% | 2024-10-01 |
| DONCASTER CHILDREN'S SERVICES TRUST LIMITED | Other | 1 | £419k | 0.0% | 2019-03-06 |
| Met Office | Other | 1 | £419k | 0.0% | 2024-04-22 |
| HULL ROYAL INFIRMARY | Other | 3 | £370k | 0.0% | 2024-03-23 |
| Intellectual Property Office | Other | 9 | £351k | 0.0% | 2022-01-31 |
| RESTORATION AND RENEWAL DELIVERY AUTHORITY LTD | Other | 2 | £346k | 0.0% | 2021-01-22 |
| UK HEALTH AND SECURITY AGENCY | Other | 2 | £267k | 0.0% | 2023-04-28 |
| FCDO Services | Other | 13 | £267k | 0.0% | 2025-01-21 |
| Bristol City Council | Other | 3 | £263k | 0.0% | 2022-04-04 |
| University Hospital Southampton NHS Foundation Trust | Other | 1 | £255k | 0.0% | 2020-04-06 |
| WAKEFIELD COUNCIL | Other | 2 | £254k | 0.0% | 2020-03-04 |
| NHS Counter Fraud Authority (NHSCFA) | Other | 1 | £248k | 0.0% | 2022-02-28 |
| Trustmarque Solution Limited | Other | 1 | £244k | 0.0% | 2023-01-04 |
| South Tees Hospitals NHS Foundation TrustNew | Other | 1 | £244k | 0.0% | 2024-10-07 |
| MHRA | Other | 8 | £239k | 0.0% | 2023-01-30 |
| Bournemouth Christchurch and Poole Council | Other | 2 | £217k | 0.0% | 2025-07-16 |
| Bradford Teaching Hospitals NHS Foundation Trust | Other | 2 | £207k | 0.0% | 2025-04-29 |
| Wakefield Council Customer Service | Other | 1 | £200k | 0.0% | 2015-11-30 |
| Wychavon District Council | Other | 1 | £194k | 0.0% | 2019-12-17 |
| COUNTESS OF CHESTER HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £177k | 0.0% | 2019-07-02 |
| Royal Borough of Kingston Upon ThamesNew | Other | 1 | £175k | 0.0% | 2025-12-08 |
| UK RESEARCH & INNOVATION | Other | 2 | £171k | 0.0% | 2024-12-04 |
| UK Research & Innovation - Medical Research Council | Other | 1 | £167k | 0.0% | 2022-02-17 |
| Hull City Council | Other | 2 | £166k | 0.0% | 2022-11-08 |
| NHS Digital | Other | 3 | £162k | 0.0% | 2018-07-30 |
| ATAMIS LTD | Other | 2 | £145k | 0.0% | 2023-03-14 |
| West Midlands Combined Authority | Other | 2 | £143k | 0.0% | 2023-02-28 |
| Department of Health & Social Care | Other | 1 | £137k | 0.0% | 2019-05-30 |
| Walsall Healthcare NHS Trust | Other | 2 | £125k | 0.0% | 2025-01-20 |
| HM Land Registry | Other | 1 | £121k | 0.0% | 2019-01-16 |
| Porton Biopharma Ltd | Other | 2 | £119k | 0.0% | 2023-03-24 |
| Sussex Partnership NHS Foundation TrustNew | Other | 1 | £115k | 0.0% | 2025-03-19 |
| HULL UNIVERSITY TEACHING HOSPITALSNew | Other | 1 | £102k | 0.0% | 2025-03-31 |
| NHS Blood and Transplant (Filton, Bristol)New | Other | 1 | £101k | 0.0% | 2026-03-06 |
| Hertfordshire NHS Procurement | Other | 1 | £100k | 0.0% | 2020-08-01 |
| Partners Procurement Service | Other | 1 | £96k | 0.0% | 2021-07-30 |
| THE PENNINE ACUTE HOSPITAL N H S TRUST | Other | 1 | £94k | 0.0% | 2016-04-01 |
| NHS BSA Supply Chain Management | Other | 2 | £92k | 0.0% | 2022-12-19 |
| Midlands & Lancashire C S U | Other | 1 | £88k | 0.0% | 2023-03-10 |
| Police and Crime Commissioner for Lincolnshire | Other | 1 | £87k | 0.0% | 2024-04-09 |
| THE UNIVERSITY OF BIRMINGHAM | Other | 1 | £87k | 0.0% | 2015-09-29 |
| Hull & East Yorkshire Hospitals Nhs Trust | Other | 1 | £85k | 0.0% | 2016-11-09 |
| N H S Dorset C C G | Other | 1 | £81k | 0.0% | 2021-07-19 |
| HEE | Other | 2 | £80k | 0.0% | 2021-11-17 |
| HM Revenue & Customs | Other | 1 | £80k | 0.0% | 2020-03-30 |
| NHS MIDLANDS AND LANCASHIRE COMMISSIONING SUPPORT UNIT | Other | 1 | £77k | 0.0% | 2021-03-16 |
| West Suffolk NHS Foundation Trust | Other | 3 | £77k | 0.0% | 2025-03-21 |
| CALDERDALE AND HUDDERSFIELD SOLUTIONS LTD | Other | 3 | £72k | 0.0% | 2022-03-10 |
| Nottingham City Council | Other | 1 | £70k | 0.0% | 2024-04-15 |
| Stockton Borough Council | Other | 1 | £68k | 0.0% | 2016-04-14 |
| Procurement | Other | 1 | £65k | 0.0% | 2023-06-24 |
| Merseyside Fire and Rescue Authority | Other | 3 | £62k | 0.0% | 2022-06-25 |
| Cambridgeshire County Council | Other | 1 | £62k | 0.0% | 2024-02-23 |
| Driver & Vehicle Standards Agency | Other | 1 | £55k | 0.0% | 2021-01-17 |
| NHS Improvements | Other | 1 | £54k | 0.0% | 2017-03-03 |
| TRINITY HOUSE | Other | 1 | £51k | 0.0% | 2020-11-30 |
| West Hertfordshire Hospitals NHS Trust | Other | 1 | £50k | 0.0% | 2022-03-07 |
| The Mersey Docks and Harbour CompanyNew | Other | 1 | £47k | 0.0% | 2025-07-01 |
| NOTTINGHAMSHIRE POLICE | Other | 1 | £45k | 0.0% | 2024-05-21 |
| Hull CollegeNew | Other | 2 | £45k | 0.0% | 2025-04-17 |
| British Transport PoliceNew | Other | 1 | £44k | 0.0% | 2025-11-24 |
| University Of The West Of England | Other | 2 | £43k | 0.0% | 2021-10-25 |
| Mid Devon District Council | Other | 2 | £41k | 0.0% | 2024-10-30 |
| East and North Herfordshire NHS Trust | Other | 1 | £40k | 0.0% | 2022-07-29 |
| Office for National StatisticsNew | Other | 1 | £38k | 0.0% | 2025-05-13 |
| NHS SOUTH, CENTRAL AND WEST COMMISSIONING SUPPORT UNIT | Other | 2 | £38k | 0.0% | 2025-07-22 |
| NHS NORTH OF ENGLAND COMMISSIONING SUPPORT UNITNew | Other | 1 | £36k | 0.0% | 2025-03-07 |
| Calderdale and Huddersfield NHS Foundation Trust | Other | 2 | £34k | 0.0% | 2022-05-13 |
| NORTH TYNESIDE COUNCIL | Other | 1 | £32k | 0.0% | 2017-05-31 |
| North Devon District Council | Other | 1 | £32k | 0.0% | 2018-09-18 |
| Royal Mint | Other | 1 | £30k | 0.0% | 2019-12-06 |
| North West Ambulance Service Nhs Trust Charitable Fund And Other Related Charities | Other | 1 | £29k | 0.0% | 2018-04-30 |
| Wolverhampton City Council | Other | 1 | £28k | 0.0% | 2024-03-15 |
| NHS BSA | Other | 1 | £27k | 0.0% | 2024-04-04 |
| Salvation Army Housing Association | Other | 1 | £24k | 0.0% | 2021-02-24 |
| United Kingdom Health Security Agency | Other | 1 | £18k | 0.0% | 2022-04-26 |
| THE HUMAN FERTILISATION & EMBRYOLOGY AUTHORITY | Other | 1 | £18k | 0.0% | 2015-11-20 |
| Trustmarque | Other | 1 | £13k | 0.0% | 2023-03-17 |
| HER MAJESTYS LAND REGISTRY | Other | 1 | £13k | 0.0% | 2017-09-27 |
| GOV FACILITY SERVICES LIMITED | Other | 1 | £12k | 0.0% | 2024-01-17 |
| North West Ambulance Service N H S Trust | Other | 1 | £0k | 0.0% | 2019-10-01 |
| CELL THERAPY CATAPULT LIMITEDNew | Other | 1 | £0k | 0.0% | 2025-06-13 |
| BFI | Other | 1 | £0k | 0.0% | 2016-12-22 |
| Offshore Renewable Energy Catapult | Other | 1 | £0k | 0.0% | 2016-05-11 |
| UK Research and Innovation | Other | 5 | £0k | 0.0% | |
| Norfolk County Council | Other | 1 | £0k | 0.0% | |
| The City of Edinburgh Council | Other | 5 | £0k | 0.0% | |
| Leeds and York Partnership NHS Foundation Trust, trading as North of England NHS Commercial Procurement Collaborative ("NOE CPC") | Other | 1 | £0k | 0.0% | |
| National Procurement, NHS Scotland | Other | 2 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 4 | £0k | 0.0% | |
| Kent County Council (t/a KCS Procurement Services) | Other | 2 | £0k | 0.0% | |
| North of England Commercial Procurement Collaborative (NOE CPC) (hosted by and acting through Leeds and York Partnership NHS Foundation Trust.) | Other | 1 | £0k | 0.0% | |
| Efficiency East Midlands Ltd | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a KCS) | Other | 4 | £0k | 0.0% | |
| The Common Services Agency (more commonly known as NHS National Services Scotland) (NSS) | Other | 2 | £0k | 0.0% | |
| Llywodraeth Cymru / Welsh Government - Commercial Delivery | Other | 3 | £0k | 0.0% | |
| Liverpool Heart and Chest Hospital NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Digital Health & Care Wales | Other | 1 | £0k | 0.0% | |
| Isle of Wight NHS Trust | Other | 1 | £0k | 0.0% | |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITED | Other | 1 | £0k | 0.0% | |
| Skills Development Scotland Co. Limited | Other | 1 | £0k | 0.0% | |
| the Education Authority | Other | 1 | £0k | 0.0% | |
| NHS Highland | Other | 1 | £0k | 0.0% | |
| Gateshead Borough Council | Other | 1 | £0k | 0.0% | |
| Royal Berkshire NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| MEDICINES DISCOVERY CATAPULT LIMITED | Other | 1 | £0k | 0.0% | |
| Somerset Council | Other | 1 | £0k | 0.0% | |