| Ministry of Housing, Communities & Local GovernmentNew | Other | 3 | £6m | 27.2% | 2025-10-22 |
| NHS EnglandNew | Other | 2 | £3m | 14.7% | 2024-09-06 |
| Department for Work & Pensions | Other | 2 | £2m | 9.1% | 2023-07-18 |
| NHS Shared Business Services Ltd (NHS SBS) | Other | 1 | £2m | 8.9% | 2021-06-23 |
| Nottinghamshire County Council | Other | 1 | £1m | 6.1% | 2021-05-10 |
| Cabinet Office | Other | 1 | £1m | 4.9% | 2018-01-22 |
| Ministry of Justice | Other | 2 | £840k | 4.1% | 2023-06-30 |
| Peterborough City Council | Other | 7 | £491k | 2.4% | 2022-12-18 |
| Pembrokeshire County CouncilNew | Other | 2 | £468k | 2.3% | 2025-11-20 |
| Yorkshire and Humber Police Procurement (Y&HPP) | Other | 1 | £400k | 1.9% | 2023-06-13 |
| Cambridgeshire County Council | Other | 3 | £336k | 1.6% | 2024-05-01 |
| Ministry of Defence | Other | 2 | £316k | 1.5% | 2021-05-19 |
| Birmingham City CouncilNew | Other | 1 | £250k | 1.2% | 2025-10-01 |
| London Borough of Merton | Other | 2 | £230k | 1.1% | 2021-04-13 |
| Merseyside Police - Procurement Department | Other | 1 | £216k | 1.1% | 2017-03-31 |
| City of Bradford Metropolitan District CouncilNew | Other | 6 | £200k | 1.0% | 2026-03-13 |
| Derbyshire County Council | Other | 1 | £150k | 0.7% | 2017-07-20 |
| West Northamptonshire Council | Other | 3 | £147k | 0.7% | 2024-07-09 |
| North Northamptonshire Council | Other | 4 | £133k | 0.6% | 2024-09-16 |
| Crown Commercial Service | Other | 2 | £130k | 0.6% | 2022-06-15 |
| DEFRA | Other | 1 | £126k | 0.6% | 2020-11-09 |
| Warwickshire Police | Other | 3 | £124k | 0.6% | 2025-01-17 |
| London Borough of HackneyNew | Other | 1 | £105k | 0.5% | 2026-02-02 |
| Coventry City Council | Other | 1 | £105k | 0.5% | 2022-11-23 |
| London Borough of Enfield | Other | 1 | £100k | 0.5% | 2023-09-24 |
| South Yorkshire Police Headquarters | Other | 1 | £95k | 0.5% | 2022-05-26 |
| Norwich City Council | Other | 1 | £94k | 0.5% | 2023-07-24 |
| Civil Nuclear Police Authority (CNPA) / Civil Nuclear Constabulary (CNC) | Other | 2 | £88k | 0.4% | 2023-08-04 |
| Middlesbrough Council | Other | 2 | £87k | 0.4% | 2024-08-25 |
| Tower Hamlets | Other | 1 | £84k | 0.4% | 2019-08-09 |
| Rother District Council | Other | 1 | £77k | 0.4% | 2024-01-29 |
| Department for Culture, Media and Sport | Other | 2 | £77k | 0.4% | 2021-03-13 |
| Staffordshire County Council | Other | 1 | £61k | 0.3% | 2016-06-20 |
| Cheshire West and Chester Council | Other | 1 | £60k | 0.3% | 2023-09-12 |
| Lincolnshire County Council | Other | 1 | £52k | 0.3% | 2019-01-18 |
| Colchester City Council | Other | 1 | £50k | 0.2% | 2023-04-04 |
| Luton CouncilNew | Other | 1 | £50k | 0.2% | 2024-10-21 |
| North Lincolnshire Council | Other | 2 | £42k | 0.2% | 2022-07-11 |
| Leicestershire County Council | Other | 1 | £35k | 0.2% | 2022-03-17 |
| Durham County Council | Other | 1 | £31k | 0.2% | 2018-09-10 |
| Torbay CouncilNew | Other | 1 | £26k | 0.1% | 2025-05-16 |
| Home Office | Other | 1 | £24k | 0.1% | 2019-03-31 |
| National Audit Office | Other | 1 | £24k | 0.1% | 2017-03-22 |
| Shropshire Council | Other | 1 | £23k | 0.1% | 2020-10-23 |
| DEPARTMENT FOR LEVELLING UP, HOUSING AND COMMUNITIES | Other | 3 | £22k | 0.1% | 2023-06-16 |
| Department for EducationNew | Other | 1 | £21k | 0.1% | 2024-12-16 |
| Bristol City Council | Other | 2 | £21k | 0.1% | 2018-11-23 |
| Leeds City Council | Other | 1 | £0k | 0.0% | |
| East Sussex County Council | Other | 1 | £0k | 0.0% | |
| YPO | Other | 1 | £0k | 0.0% | |
| West Yorkshire Combined Authority | Other | 1 | £0k | 0.0% | |
| Yorkshire Purchasing Organisation | Other | 1 | £0k | 0.0% | |
| CHESHIRE EAST COUNCIL | Other | 1 | £0k | 0.0% | |
| Charity Commission for Northern Ireland (CCNI) | Other | 1 | £0k | 0.0% | |
| Somerset Council | Other | 1 | £0k | 0.0% | |
| Exeter City Council | Other | 1 | £0k | 0.0% | |