| DEPARTMENT FOR LEVELLING UP, HOUSING AND COMMUNITIES | Other | 4 | £51m | 23.8% | 2022-08-04 |
| Crown Commercial Service | Other | 8 | £30m | 13.7% | 2025-04-16 |
| DfTc - Department for Transport | Other | 6 | £28m | 12.8% | 2026-01-20 |
| NHS Digital : Department of Health and Social Care | Other | 2 | £23m | 10.7% | 2020-12-08 |
| Department of Health and Social Care (DHSC) | Other | 2 | £23m | 10.6% | 2023-09-07 |
| DEPARTMENT FOR COMMUNITIES & LOCAL GOVERNMENT | Other | 1 | £16m | 7.4% | 2011-12-01 |
| Gambling Commission | Other | 4 | £8m | 3.6% | 2025-10-01 |
| COLLEGE OF POLICING LIMITEDNew | Other | 4 | £6m | 2.8% | 2026-02-20 |
| Department for Education | Other | 6 | £4m | 2.0% | 2026-01-20 |
| H M REVENUE & CUSTOMS | Other | 6 | £3m | 1.5% | 2023-04-14 |
| Home Office | Other | 8 | £3m | 1.3% | 2025-01-21 |
| DEFRA | Other | 2 | £3m | 1.3% | 2022-04-19 |
| Ministry of Justice | Other | 11 | £2m | 1.0% | 2025-10-13 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 11 | £2m | 0.8% | 2024-11-26 |
| Department for Culture, Media and Sport | Other | 10 | £2m | 0.7% | 2024-12-02 |
| Government Commercial AgencyNew | Other | 1 | £2m | 0.7% | 2026-05-13 |
| SUSTRANS LIMITED | Other | 2 | £1m | 0.6% | 2022-12-12 |
| Department for Transport | Other | 3 | £1m | 0.5% | 2020-10-01 |
| UK Shared Business Services Ltd | Other | 1 | £1m | 0.5% | 2016-01-01 |
| Competition and Markets Authority | Other | 4 | £872k | 0.4% | 2024-11-13 |
| UK SBS | Other | 3 | £851k | 0.4% | 2025-10-13 |
| Department for Work & Pensions | Other | 4 | £623k | 0.3% | 2025-07-07 |
| SustransNew | Other | 3 | £600k | 0.3% | 2024-12-09 |
| OFCOM | Other | 2 | £588k | 0.3% | 2024-02-14 |
| NOE CPC | Other | 1 | £588k | 0.3% | 2018-05-30 |
| HM Revenue & Customs | Other | 1 | £446k | 0.2% | 2014-11-17 |
| CPS | Other | 2 | £346k | 0.2% | 2023-11-10 |
| Department for Business, Energy & Industrial Strategy | Other | 1 | £249k | 0.1% | 2023-01-18 |
| Ministry of Housing, Communities & Local Government | Other | 2 | £247k | 0.1% | 2020-10-07 |
| Department for Business & TradeNew | Other | 1 | £234k | 0.1% | 2025-01-31 |
| Natural England | Other | 5 | £233k | 0.1% | 2025-11-13 |
| Manchester City Council | Other | 1 | £188k | 0.1% | 2016-10-03 |
| Financial Conduct Authority (FCA) | Other | 1 | £172k | 0.1% | 2020-05-01 |
| Department for Environment Food & Rural AffairsNew | Other | 3 | £171k | 0.1% | 2026-01-08 |
| Care Quality CommissionNew | Other | 3 | £152k | 0.1% | 2024-07-12 |
| UK Health Security Agency | Other | 1 | £151k | 0.1% | 2022-01-21 |
| Homes England (the name adopted by the Homes and Communities Agency)New | Other | 2 | £130k | 0.1% | 2025-08-12 |
| Office for National Statistics | Other | 2 | £121k | 0.1% | 2024-06-24 |
| Department for Energy Security & Net ZeroNew | Other | 2 | £120k | 0.1% | 2024-12-10 |
| Equality and Human Rights Commission | Other | 2 | £108k | 0.1% | 2019-03-25 |
| Department of Health and Social Care (T&T) | Other | 1 | £105k | 0.0% | 2021-09-30 |
| Department of Health & Social Care | Other | 4 | £103k | 0.0% | 2022-04-07 |
| Construction Industry Training Board | Other | 1 | £100k | 0.0% | 2024-04-25 |
| Central Bedfordshire Council | Other | 1 | £89k | 0.0% | 2022-01-12 |
| Newcastle University | Other | 2 | £83k | 0.0% | 2021-12-13 |
| University of EssexNew | Other | 1 | £60k | 0.0% | 2026-03-23 |
| Norfolk Constabulary and Suffolk Constabulary Procurement Unit | Other | 1 | £51k | 0.0% | 2018-01-22 |
| Department for International Trade | Other | 1 | £50k | 0.0% | 2019-02-14 |
| NE | Other | 1 | £42k | 0.0% | 2023-11-20 |
| Yorkshire and Humber Police Procurement (Y&HPP) | Other | 1 | £37k | 0.0% | 2018-02-06 |
| London School of Hygiene & Tropical Medicine | Other | 2 | £0k | 0.0% | |
| Llywodraeth Cymru / Welsh Government | Other | 4 | £0k | 0.0% | |
| Scottish Government | Other | 6 | £0k | 0.0% | |
| Natural Resources Wales | Other | 1 | £0k | 0.0% | |