| Government Commercial AgencyNew | Other | 2 | £10.0bn | 53.8% | 2026-01-12 |
| YPO | Other | 14 | £6.4bn | 34.3% | 2024-02-13 |
| HEART ACADEMIES TRUSTNew | Other | 4 | £723m | 3.9% | 2026-01-15 |
| Espo | Other | 9 | £168m | 0.9% | 2022-07-06 |
| Harris Federation | Other | 14 | £160m | 0.9% | 2025-11-14 |
| Kirklees Council | Other | 3 | £117m | 0.6% | 2025-03-05 |
| London Borough of Waltham ForestNew | Other | 4 | £100m | 0.5% | 2026-02-24 |
| Commercial Services Kent LimitedNew | Other | 1 | £90m | 0.5% | 2026-03-30 |
| Leicester City Council | Other | 2 | £79m | 0.4% | 2022-03-29 |
| Leicestershire County Council | Other | 3 | £76m | 0.4% | 2025-08-19 |
| Leeds City Council | Other | 12 | £67m | 0.4% | 2025-12-16 |
| Lancashire County Council | Other | 1 | £64m | 0.3% | 2018-05-08 |
| Nottinghamshire County Council | Other | 2 | £57m | 0.3% | 2020-05-12 |
| Thames Valley Police | Other | 1 | £55m | 0.3% | 2018-11-02 |
| Hampshire County Council | Other | 3 | £52m | 0.3% | 2023-08-24 |
| Barnsley Metropolitan Borough CouncilNew | Other | 2 | £48m | 0.3% | 2025-03-07 |
| Reading Borough Council | Other | 2 | £46m | 0.2% | 2024-11-25 |
| Financial Ombudsman Service | Other | 4 | £44m | 0.2% | 2023-07-14 |
| Rotherham Metropolitan Borough CouncilNew | Other | 1 | £40m | 0.2% | 2024-09-30 |
| WAKEFIELD COUNCILNew | Other | 1 | £33m | 0.2% | 2025-04-05 |
| Oldham Council | Other | 3 | £22m | 0.1% | 2023-08-06 |
| CLARION HOUSING GROUP LIMITED | Other | 2 | £15m | 0.1% | 2023-09-04 |
| Lancashire Constabulary | Other | 49 | £15m | 0.1% | 2025-12-01 |
| CIRRUS PURCHASING LTD | Other | 2 | £12m | 0.1% | 2025-08-27 |
| Greater Manchester Combined Authority - Greater Manchester Police | Other | 2 | £12m | 0.1% | 2023-05-16 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 221 | £11m | 0.1% | 2026-04-29 |
| National Employment Savings Trust (NEST) CorporationNew | Other | 6 | £8m | 0.0% | 2025-07-18 |
| Thirteen Housing Group Limited | Other | 4 | £8m | 0.0% | 2024-06-21 |
| South Thames College Group | Other | 1 | £8m | 0.0% | 2021-06-08 |
| Cambridgeshire County Council | Other | 4 | £7m | 0.0% | 2025-01-31 |
| Department of Health & Social Care | Other | 2 | £6m | 0.0% | 2021-09-23 |
| Star Procurement | Other | 1 | £6m | 0.0% | 2016-10-14 |
| Health Authority | Other | 1 | £5m | 0.0% | 2023-07-10 |
| London Borough of HillingdonNew | Other | 1 | £4m | 0.0% | 2026-01-06 |
| Derby College GroupNew | Other | 2 | £4m | 0.0% | 2025-07-11 |
| General Medical Council (GMC) | Other | 1 | £3m | 0.0% | 2020-03-18 |
| National Audit Office | Other | 5 | £3m | 0.0% | 2023-12-01 |
| One Housing | Other | 1 | £3m | 0.0% | 2021-11-23 |
| Kingston Upon Hull City Council | Other | 9 | £3m | 0.0% | 2020-08-16 |
| Peterborough City Council | Other | 2 | £3m | 0.0% | 2023-08-17 |
| City of Doncaster Council | Other | 8 | £3m | 0.0% | 2025-07-04 |
| ASTON UNIVERSITYNew | Other | 1 | £2m | 0.0% | 2025-02-12 |
| Crown Commercial Service | Other | 5 | £2m | 0.0% | 2023-06-02 |
| Tyne Coast College | Other | 2 | £2m | 0.0% | 2021-10-21 |
| Procurement for Housing | Other | 1 | £2m | 0.0% | 2019-09-05 |
| Homes England (the name adopted by the Homes and Communities Agency) | Other | 24 | £2m | 0.0% | 2023-01-02 |
| Thirteen Housing Group Ltd | Other | 1 | £2m | 0.0% | 2020-08-03 |
| One Housing Group | Other | 1 | £2m | 0.0% | 2019-03-15 |
| UK Health Security Agency | Other | 14 | £2m | 0.0% | 2022-04-13 |
| NHS Blood and Transplant (NHSBT) | Other | 2 | £2m | 0.0% | 2025-08-19 |
| Department for Education | Other | 1 | £1m | 0.0% | 2017-11-09 |
| Peabody Trust | Other | 1 | £1m | 0.0% | 2023-03-08 |
| York College | Other | 3 | £1m | 0.0% | 2026-04-23 |
| MONEY AND PENSIONS SERVICE | Other | 1 | £1m | 0.0% | 2021-09-16 |
| UK HEALTH AND SECURITY AGENCY | Other | 1 | £1m | 0.0% | 2022-11-10 |
| Wirral Borough CouncilNew | Other | 1 | £926k | 0.0% | 2025-01-30 |
| FCDO Services | Other | 31 | £921k | 0.0% | 2023-01-19 |
| London Borough of Lewisham | Other | 2 | £910k | 0.0% | 2023-10-17 |
| Housing 21New | Other | 2 | £833k | 0.0% | 2024-06-30 |
| THE ACADEMIES FOR CHARACTER AND EXCELLENCENew | Other | 2 | £750k | 0.0% | 2025-09-02 |
| Oxford City Council | Other | 2 | £675k | 0.0% | 2021-06-01 |
| Medicines and Healthcare Products Regulatory Agency | Other | 2 | £635k | 0.0% | 2025-02-18 |
| City of London Corporation | Other | 9 | £610k | 0.0% | 2024-08-05 |
| Transport for London | Other | 5 | £601k | 0.0% | 2025-03-01 |
| NATIONAL WEALTH FUND LIMITEDNew | Other | 1 | £600k | 0.0% | 2025-04-30 |
| the Education Authority | Other | 1 | £500k | 0.0% | 2024-05-24 |
| Great Places Housing Group | Other | 4 | £497k | 0.0% | 2022-11-21 |
| Oxfordshire County Council | Other | 2 | £466k | 0.0% | |
| London Borough of Sutton | Other | 1 | £460k | 0.0% | 2024-03-08 |
| Parliament UK | Other | 1 | £417k | 0.0% | 2017-09-08 |
| Wigan Council | Other | 2 | £402k | 0.0% | 2025-04-24 |
| Department for Business, Energy & Industrial Strategy | Other | 1 | £384k | 0.0% | 2023-04-03 |
| L&Q Construction | Other | 1 | £375k | 0.0% | 2021-05-11 |
| Liverty | Other | 1 | £333k | 0.0% | 2018-05-31 |
| Borough Council of Calderdale | Other | 1 | £308k | 0.0% | 2018-04-10 |
| Department of Health and Social Care (T&T) | Other | 3 | £300k | 0.0% | 2021-08-19 |
| UK RESEARCH & INNOVATION | Other | 1 | £266k | 0.0% | 2023-09-27 |
| ATAMIS LTD | Other | 1 | £257k | 0.0% | 2021-04-15 |
| Cabinet OfficeNew | Other | 1 | £256k | 0.0% | 2025-06-10 |
| Home Office | Other | 1 | £250k | 0.0% | 2022-07-18 |
| East Midlands Housing Group | Other | 1 | £245k | 0.0% | 2023-07-31 |
| Civil Nuclear Police Authority (CNPA) / Civil Nuclear Constabulary (CNC) | Other | 2 | £212k | 0.0% | 2022-01-07 |
| Construction Industry Training BoardNew | Other | 2 | £210k | 0.0% | 2025-07-10 |
| UNIVERSITY OF EAST ANGLIANew | Other | 1 | £200k | 0.0% | 2026-03-29 |
| The Charity Commission For England And WalesNew | Other | 1 | £200k | 0.0% | 2025-10-28 |
| THE FINANCIAL REPORTING COUNCIL LIMITED | Other | 2 | £193k | 0.0% | 2024-10-08 |
| Sport England | Other | 1 | £160k | 0.0% | 2021-06-17 |
| Hull City Council | Other | 2 | £160k | 0.0% | 2018-03-13 |
| Driver and Vehicle Licensing Agency | Other | 1 | £151k | 0.0% | 2021-11-09 |
| oneSource | Other | 1 | £150k | 0.0% | 2020-03-25 |
| Hampshire and Isle of Wight Fire and Rescue Authority New | Other | 1 | £145k | 0.0% | 2025-12-31 |
| Royal Armouries MuseumNew | Other | 1 | £137k | 0.0% | 2026-02-27 |
| NHS Digital | Other | 1 | £124k | 0.0% | 2021-08-18 |
| Tameside College | Other | 1 | £117k | 0.0% | 2019-10-31 |
| LIVEWEST HOMES LIMITED | Other | 22 | £113k | 0.0% | 2020-03-20 |
| DEFRANew | Other | 1 | £100k | 0.0% | 2026-01-14 |
| National Employment Savings Trust (NEST) | Other | 1 | £100k | 0.0% | 2021-06-28 |
| Newcastle University | Other | 1 | £100k | 0.0% | 2016-01-08 |
| Ministry of Defence | Other | 2 | £94k | 0.0% | 2023-12-11 |
| Ordnance Survey Ltd | Other | 1 | £90k | 0.0% | 2020-08-13 |
| Government Actuary Department | Other | 1 | £83k | 0.0% | 2022-09-02 |
| Salford City CouncilNew | Other | 1 | £80k | 0.0% | 2026-03-17 |
| London Ambulance Service NHS Trust | Other | 1 | £80k | 0.0% | 2023-11-02 |
| British Business Bank | Other | 1 | £75k | 0.0% | 2019-11-24 |
| Financial Ombudsman Service Limited | Other | 1 | £71k | 0.0% | 2020-09-14 |
| Public Health England | Other | 1 | £69k | 0.0% | 2021-03-30 |
| BANK OF ENGLAND | Other | 1 | £56k | 0.0% | 2022-09-19 |
| Intellectual Property Office | Other | 1 | £51k | 0.0% | 2024-01-12 |
| Intellectual PropertyOffice | Other | 1 | £50k | 0.0% | 2023-07-10 |
| The Water Services Regulation Authority | Other | 1 | £49k | 0.0% | 2016-09-09 |
| Department for Culture, Media and Sport | Other | 1 | £46k | 0.0% | 2020-05-22 |
| National Citizen Service | Other | 1 | £40k | 0.0% | 2019-07-01 |
| TRINITY HOUSE | Other | 1 | £39k | 0.0% | 2021-07-12 |
| Southampton City Council | Other | 1 | £34k | 0.0% | 2019-09-06 |
| The Insolvency Service | Other | 1 | £34k | 0.0% | 2023-08-20 |
| CENTRE FOR PROCESS INNOVATION LIMITED | Other | 1 | £32k | 0.0% | 2021-05-25 |
| Foreign Commonwealth and Development Office | Other | 2 | £31k | 0.0% | 2022-02-28 |
| UK Debt Management Office | Other | 1 | £30k | 0.0% | 2022-03-07 |
| Valuation Office Agency | Other | 1 | £26k | 0.0% | 2022-06-23 |
| Health and Safety Executive | Other | 1 | £21k | 0.0% | 2020-01-17 |
| Wandle Housing Association | Other | 2 | £18k | 0.0% | 2023-07-31 |
| The National Archives | Other | 1 | £16k | 0.0% | 2023-06-05 |
| Equality and Human Rights Commission | Other | 1 | £15k | 0.0% | 2016-10-10 |
| Health & Safety Executive | Other | 1 | £12k | 0.0% | 2020-11-23 |
| SERIOUS FRAUD OFFICE | Other | 1 | £10k | 0.0% | 2023-09-30 |
| CRESCENT PURCHASING LIMITED | Other | 1 | £9k | 0.0% | 2018-07-19 |
| Barking and Dagenham College | Other | 6 | £6k | 0.0% | 2021-09-17 |
| Colchester Institute | Other | 1 | £4k | 0.0% | 2017-07-19 |
| The Windsor Forest Colleges Group | Other | 1 | £0k | 0.0% | 2019-03-29 |
| Wirral CouncilNew | Other | 1 | £0k | 0.0% | 2026-02-09 |
| ORBIT GROUP LIMITEDNew | Other | 6 | £0k | 0.0% | 2025-11-05 |
| Waltham Forest CollegeNew | Other | 1 | £0k | 0.0% | 2025-04-08 |
| Northern Procurement Group Limited | Other | 1 | £0k | 0.0% | 2017-10-24 |
| Saltwood C Of E Primary School | Other | 1 | £0k | 0.0% | 2016-01-01 |
| Lincolnshire County Council | Other | 1 | £0k | 0.0% | |
| Blackpool Council | Other | 2 | £0k | 0.0% | |
| Somerset Council | Other | 2 | £0k | 0.0% | |
| The University Caterers Organisation Ltd (TUCO Ltd) | Other | 1 | £0k | 0.0% | |
| Cornwall Council | Other | 1 | £0k | 0.0% | |
| University of Glasgow | Other | 2 | £0k | 0.0% | |
| The Mayor and Commonalty and Citizens of the City of London | Other | 1 | £0k | 0.0% | |
| HealthTrust Europe LLP (HTE) acting on behalf of | Other | 1 | £0k | 0.0% | |
| VisitScotland | Other | 1 | £0k | 0.0% | |
| EMH Care and Support Limited | Other | 1 | £0k | 0.0% | |
| UK Research & Innovation | Other | 1 | £0k | 0.0% | |
| Welsh Government - Commercial Delivery | Other | 3 | £0k | 0.0% | |
| London Councils | Other | 2 | £0k | 0.0% | |
| West Mercia Police | Other | 1 | £0k | 0.0% | |
| London South East Colleges | Other | 4 | £0k | 0.0% | |
| The Common Services Agency (more commonly known as NHS National Services Scotland) (NSS) | Other | 1 | £0k | 0.0% | |
| Stonewater Ltd | Other | 5 | £0k | 0.0% | |
| Post Office | Other | 1 | £0k | 0.0% | |
| Historic England | Other | 1 | £0k | 0.0% | |
| Hillcrest | Other | 2 | £0k | 0.0% | |
| Southern Universities Purchasing Consortium (SUPC) | Other | 7 | £0k | 0.0% | |
| TUCO Ltd | Other | 8 | £0k | 0.0% | |
| Scotland Excel | Other | 1 | £0k | 0.0% | |
| NHS National Services Scotland | Other | 1 | £0k | 0.0% | |
| Walsall Council | Other | 1 | £0k | 0.0% | |
| UNITED UTILITIES WATER LIMITED | Other | 2 | £0k | 0.0% | |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITED | Other | 3 | £0k | 0.0% | |
| Cirrus Consortium c/o Halton Housing | Other | 2 | £0k | 0.0% | |
| LEEDS TRINITY UNIVERSITY | Other | 4 | £0k | 0.0% | |
| New Forest District Council | Other | 1 | £0k | 0.0% | |
| Liverpool City Council | Other | 1 | £0k | 0.0% | |
| Office for Students | Other | 1 | £0k | 0.0% | |
| Hyde Housing Association Ltd | Other | 1 | £0k | 0.0% | |
| NORWICH CITY SERVICES LIMITED | Other | 3 | £0k | 0.0% | |
| Leeds City Council - PACS | Other | 1 | £0k | 0.0% | |
| ulster university | Other | 1 | £0k | 0.0% | |
| Education | Other | 2 | £0k | 0.0% | |