| Crown Commercial Service | Other | 4 | £31m | 28.3% | 2021-03-23 |
| Department for Work & Pensions | Other | 4 | £25m | 23.0% | 2024-07-01 |
| Ministry of Justice | Other | 4 | £15m | 13.5% | 2025-11-06 |
| COUNTESS OF CHESTER HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £7m | 6.5% | 2019-09-23 |
| Espo | Other | 3 | £7m | 6.0% | 2019-06-25 |
| Avon and Wiltshire Mental Health Partnership NHS trust | Other | 2 | £2m | 1.7% | 2024-10-17 |
| BLACK COUNTRY PARTNERSHIP NHS FOUNDATION TRUST | Other | 1 | £2m | 1.7% | 2019-10-18 |
| Leicestershire County CouncilNew | Other | 1 | £2m | 1.4% | 2025-01-27 |
| Southern Health NHS Foundation Trust | Other | 1 | £1m | 1.1% | 2016-10-04 |
| Bristol City CouncilNew | Other | 1 | £1m | 1.0% | 2024-10-21 |
| London Borough of LewishamNew | Other | 1 | £1m | 0.9% | 2024-11-26 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 2 | £960k | 0.9% | 2021-07-23 |
| HS2 | Other | 1 | £937k | 0.8% | 2022-02-21 |
| National Highways Limited | Other | 1 | £893k | 0.8% | 2016-03-31 |
| Home OfficeNew | Other | 1 | £815k | 0.7% | 2024-09-16 |
| Care Quality Commission | Other | 2 | £681k | 0.6% | 2017-09-13 |
| Department for Transport | Other | 1 | £655k | 0.6% | 2016-01-06 |
| Office for National Statistics | Other | 2 | £655k | 0.6% | 2018-02-28 |
| United Kingdom Atomic Energy Authority | Other | 1 | £600k | 0.5% | 2022-02-16 |
| Oldham Council | Other | 2 | £560k | 0.5% | 2024-06-05 |
| NHS Shared Business Services | Other | 2 | £555k | 0.5% | 2024-09-16 |
| Department of Health and Social Care (T&T) | Other | 1 | £525k | 0.5% | 2021-01-26 |
| Sanctuary Housing Association | Other | 1 | £500k | 0.5% | 2020-07-01 |
| University of South WalesNew | Other | 1 | £475k | 0.4% | 2025-08-01 |
| Warwickshire PoliceNew | Other | 2 | £392k | 0.4% | 2026-03-31 |
| ICS on behalf of DSIT and DESNZNew | Other | 1 | £375k | 0.3% | 2025-07-22 |
| Manchester Metropolitan University | Other | 1 | £370k | 0.3% | 2024-02-07 |
| Buckinghamshire Council | Other | 1 | £358k | 0.3% | 2019-06-25 |
| North Lincolnshire Council | Other | 2 | £332k | 0.3% | 2022-01-01 |
| ASTON UNIVERSITY | Other | 2 | £328k | 0.3% | 2023-01-18 |
| East Sussex County CouncilNew | Other | 2 | £317k | 0.3% | 2025-12-19 |
| Government Legal DepartmentNew | Other | 1 | £314k | 0.3% | 2025-12-15 |
| Medicines and Healthcare Products Regulatory Agency | Other | 1 | £310k | 0.3% | 2024-02-12 |
| Halton Borough CouncilNew | Other | 1 | £308k | 0.3% | 2025-07-01 |
| Independent Office for Police Conduct | Other | 2 | £284k | 0.3% | 2022-08-02 |
| British Transport PoliceNew | Other | 1 | £279k | 0.3% | 2025-04-24 |
| Wakefield and District Housing | Other | 1 | £270k | 0.2% | 2020-12-18 |
| University of HertfordshireNew | Other | 1 | £245k | 0.2% | 2024-09-02 |
| London Borough of Merton | Other | 1 | £220k | 0.2% | 2018-03-19 |
| The Police and Crime Commissioner for LeicestershireNew | Other | 2 | £200k | 0.2% | 2026-02-05 |
| Cabinet Office | Other | 1 | £200k | 0.2% | 2018-08-09 |
| London Borough of Newham | Other | 1 | £182k | 0.2% | 2021-02-09 |
| HM Land RegistryNew | Other | 1 | £180k | 0.2% | 2025-10-02 |
| Oxford City Council | Other | 1 | £175k | 0.2% | 2018-01-03 |
| LONDON BOROUGH OF HAVERING | Other | 1 | £170k | 0.2% | 2021-02-09 |
| OfgemNew | Other | 1 | £150k | 0.1% | 2024-07-31 |
| Middlesbrough Council | Other | 1 | £140k | 0.1% | 2021-03-16 |
| SERIOUS FRAUD OFFICE | Other | 1 | £122k | 0.1% | 2021-10-08 |
| The Pensions RegulatorNew | Other | 1 | £120k | 0.1% | 2025-06-18 |
| Department of Health and Social Care (DHSC)New | Other | 4 | £117k | 0.1% | 2025-09-16 |
| COLLEGE OF POLICING LIMITED | Other | 1 | £100k | 0.1% | 2022-02-23 |
| NHS North of England CSU | Other | 1 | £97k | 0.1% | 2021-01-26 |
| Equality and Human Rights Commission | Other | 2 | £96k | 0.1% | 2021-04-13 |
| Bournemouth Christchurch and Poole Council | Other | 1 | £93k | 0.1% | 2018-10-28 |
| General Medical Council (GMC) | Other | 1 | £90k | 0.1% | 2021-11-26 |
| Tameside College | Other | 1 | £77k | 0.1% | 2020-08-13 |
| North Lindsey College | Other | 1 | £75k | 0.1% | 2021-02-22 |
| Homes England : Ministry of Housing, Communities & Local Government | Other | 1 | £75k | 0.1% | 2019-06-14 |
| General Dental Council | Other | 2 | £70k | 0.1% | 2025-03-21 |
| University of Chester | Other | 1 | £70k | 0.1% | 2017-07-25 |
| The Insolvency ServiceNew | Other | 1 | £68k | 0.1% | 2025-07-01 |
| Public Health England | Other | 1 | £60k | 0.1% | 2021-08-16 |
| Durham County Council | Other | 1 | £60k | 0.1% | 2020-06-04 |
| NHS Supply Chain Coordination | Other | 1 | £56k | 0.1% | 2023-10-29 |
| Office for StudentsNew | Other | 1 | £50k | 0.0% | 2024-07-19 |
| Department for International Trade | Other | 1 | £44k | 0.0% | 2021-10-22 |
| MHRA | Other | 1 | £33k | 0.0% | 2023-03-16 |
| Office of Rail and Road | Other | 1 | £26k | 0.0% | 2022-02-18 |
| Department of Health & Social Care | Other | 1 | £22k | 0.0% | 2023-06-13 |
| East Midlands Ambulance Service NHS Trust | Other | 1 | £7k | 0.0% | 2019-06-14 |
| Police and Crime Commissioner for West MidlandsNew | Other | 1 | £0k | 0.0% | 2026-05-08 |
| Sefton Metropolitan Borough CouncilNew | Other | 2 | £0k | 0.0% | 2025-11-07 |
| University of BrightonNew | Other | 1 | £0k | 0.0% | 2025-07-23 |
| STAR ACADEMIES | Other | 1 | £0k | 0.0% | 2019-10-14 |
| Supply Hertfordshire | Other | 1 | £0k | 0.0% | 2018-03-09 |
| Leeds Beckett University | Other | 1 | £0k | 0.0% | 2017-11-10 |
| The Manchester College | Other | 1 | £0k | 0.0% | 2016-07-22 |
| East London NHS Foundation Trust | Other | 3 | £0k | 0.0% | |
| Cambridgeshire & Peterborough Foundation Trust | Other | 1 | £0k | 0.0% | |
| Cambridgeshire Community Services NHS Trust | Other | 1 | £0k | 0.0% | |
| Leeds and York Partnership NHS Foundation Trust | Other | 3 | £0k | 0.0% | |
| Broadland District Council | Other | 1 | £0k | 0.0% | |
| Transport for Wales | Other | 1 | £0k | 0.0% | |
| Scottish Water | Other | 1 | £0k | 0.0% | |
| University Of Edinburgh | Other | 1 | £0k | 0.0% | |
| North Ayrshire Council | Other | 1 | £0k | 0.0% | |
| SOMERSET NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| The Highland Council | Other | 1 | £0k | 0.0% | |
| YPO | Other | 1 | £0k | 0.0% | |
| Moray Council | Other | 1 | £0k | 0.0% | |
| Renfrewshire Council | Other | 1 | £0k | 0.0% | |
| Fife Council | Other | 1 | £0k | 0.0% | |
| University of Glasgow | Other | 1 | £0k | 0.0% | |
| University of Hertfordshire Higher Education Corporation | Other | 1 | £0k | 0.0% | |
| Sanctuary Housing Group | Other | 1 | £0k | 0.0% | |
| NHS North East and North Cumbria Integrated Care Board | Other | 1 | £0k | 0.0% | |
| Greater Manchester Combined Authority - GMP | Other | 1 | £0k | 0.0% | |
| The Minister for the Cabinet Office acting through Crown Commercial Service | Other | 3 | £0k | 0.0% | |
| LEEDS TRINITY UNIVERSITY | Other | 1 | £0k | 0.0% | |
| London Borough of Haringey | Other | 1 | £0k | 0.0% | |