| Crown Commercial Service | Other | 3 | £23m | 28.0% | 2020-02-11 |
| YPO | Other | 2 | £19m | 23.2% | 2019-06-24 |
| TRINITY HOUSE | Other | 2 | £11m | 13.2% | 2025-01-22 |
| Ministry of Defence | Other | 1 | £7m | 8.6% | 2021-10-28 |
| NUCLEAR DECOMMISSIONING AUTHORITY | Other | 1 | £7m | 8.0% | 2018-03-31 |
| Department for Education | Other | 3 | £4m | 5.3% | 2022-09-29 |
| National Highways | Other | 16 | £2m | 2.8% | 2023-03-30 |
| FCDO Services | Other | 7 | £2m | 2.3% | 2020-08-13 |
| DEFRA | Other | 8 | £781k | 1.0% | 2026-01-27 |
| CALDERDALE AND HUDDERSFIELD SOLUTIONS LTD | Other | 1 | £731k | 0.9% | 2021-06-29 |
| Maritime & Coastguard Agency | Other | 3 | £731k | 0.9% | 2019-06-26 |
| Highways Agency | Other | 9 | £689k | 0.9% | 2018-03-28 |
| NHS Blood and Transplant (NHSBT)New | Other | 1 | £600k | 0.7% | 2025-12-15 |
| NHS EnglandNew | Other | 1 | £503k | 0.6% | 2025-01-28 |
| Home Office | Other | 3 | £430k | 0.5% | 2026-03-16 |
| South of England Procurement Centre | Other | 1 | £334k | 0.4% | 2023-04-01 |
| H M REVENUE & CUSTOMS | Other | 2 | £262k | 0.3% | 2026-04-29 |
| Public Health England | Other | 2 | £200k | 0.2% | 2021-03-31 |
| UK Hydrographic Office | Other | 3 | £175k | 0.2% | 2024-04-30 |
| United Kingdom Hydrographic Office | Other | 1 | £164k | 0.2% | 2017-08-07 |
| Department for Work & Pensions | Other | 1 | £144k | 0.2% | 2018-11-01 |
| BANK OF ENGLAND | Other | 1 | £130k | 0.2% | 2023-06-08 |
| MCA - Maritime and Coastguard Agency | Other | 7 | £130k | 0.2% | 2025-06-25 |
| The Queen Elizabeth Hospital King's Lynn NHS Foundation Trust | Other | 4 | £124k | 0.2% | 2021-10-31 |
| Ministry of Justice | Other | 2 | £111k | 0.1% | 2016-09-28 |
| OfgemNew | Other | 2 | £107k | 0.1% | 2025-08-22 |
| Dorset HealthCare University NHS Foundation Trust | Other | 1 | £103k | 0.1% | 2020-08-14 |
| BBC (British Broadcasting Corporation) | Other | 1 | £100k | 0.1% | 2019-09-24 |
| UK Health Security Agency | Other | 3 | £84k | 0.1% | 2025-03-31 |
| Defence Science and Technology Laboratory | Other | 1 | £84k | 0.1% | 2023-07-24 |
| CENTRE FOR ENVIRONMENT, FISHERIES AND AQUACULTURE SCIENCE | Other | 1 | £40k | 0.0% | 2019-01-14 |
| Department for Transport | Other | 1 | £37k | 0.0% | 2015-12-18 |
| NHS Property Services Limited | Other | 1 | £37k | 0.0% | 2022-04-14 |
| Department of Health and Social Care (DHSC) | Other | 1 | £15k | 0.0% | 2020-11-18 |
| RCDTS | Other | 1 | £15k | 0.0% | 2017-10-30 |
| HM Revenue & Customs | Other | 2 | £15k | 0.0% | 2017-10-09 |
| Office of Rail and Road | Other | 1 | £12k | 0.0% | 2024-04-06 |
| County Durham and Darlington NHS Foundation Trust | Other | 2 | £10k | 0.0% | 2025-12-30 |
| Department for International Trade | Other | 1 | £10k | 0.0% | 2019-09-23 |
| SYNCHRONICITY CARE LTDNew | Other | 1 | £3k | 0.0% | 2025-12-12 |
| Nhs Blood & Transplant | Other | 1 | £0k | 0.0% | 2020-10-21 |
| THAMES WATER UTILITIES LIMITED | Other | 1 | £0k | 0.0% | |
| Northern Lighthouse Board | Other | 1 | £0k | 0.0% | |
| Glasgow City Council | Other | 1 | £0k | 0.0% | |
| EAST CHESHIRE NHS TRUST | Other | 1 | £0k | 0.0% | |