| Crown Commercial Service | Other | 6 | £191m | 40.1% | 2022-08-12 |
| Ministry of Defence | Other | 2 | £151m | 31.7% | 2024-07-04 |
| Home Office | Other | 3 | £31m | 6.5% | 2025-06-21 |
| N H S Shared Business Services | Other | 2 | £19m | 4.1% | 2024-09-13 |
| Durham University | Other | 1 | £15m | 3.2% | 2018-03-19 |
| YORK AND SCARBOROUGH TEACHING HOSPITALS NHS FOUNDATION TRUSTNew | Other | 1 | £14m | 2.9% | 2024-10-15 |
| NHS Commercial SolutionsNew | Other | 1 | £14m | 2.9% | 2024-09-01 |
| Nhs Blood & Transplant | Other | 1 | £9m | 1.8% | 2019-06-13 |
| MCA - Maritime and Coastguard Agency | Other | 8 | £7m | 1.4% | 2022-06-22 |
| DEFRA | Other | 27 | £4m | 0.9% | 2024-03-20 |
| Government Commercial AgencyNew | Other | 1 | £4m | 0.9% | 2026-03-16 |
| THE UNIVERSITY OF BIRMINGHAM | Other | 3 | £3m | 0.7% | 2015-12-03 |
| London Borough of Hounslow | Other | 2 | £2m | 0.5% | 2017-11-21 |
| Maritime & Coastguard Agency | Other | 36 | £2m | 0.5% | 2017-10-03 |
| Karbon HomesNew | Other | 2 | £2m | 0.3% | 2025-10-22 |
| Sellafield Ltd | Other | 3 | £1m | 0.3% | 2018-08-22 |
| Nottinghamshire Healthcare NHS Foundation TrustNew | Other | 1 | £787k | 0.2% | 2025-06-16 |
| Cleveland Fire Authority | Other | 1 | £750k | 0.2% | 2019-03-08 |
| BROMFORD FLAGSHIP LIMITEDNew | Other | 1 | £700k | 0.1% | 2025-06-10 |
| Hertfordshire Constabulary | Other | 1 | £679k | 0.1% | 2020-10-21 |
| Driver and Vehicle Licensing AgencyNew | Other | 1 | £446k | 0.1% | 2024-09-11 |
| UK Research and Innovation | Other | 2 | £380k | 0.1% | 2026-02-12 |
| NATIONAL WEALTH FUND LIMITEDNew | Other | 1 | £291k | 0.1% | 2024-06-02 |
| University of SunderlandNew | Other | 1 | £270k | 0.1% | 2024-06-13 |
| CTM Portal for the NDA Shared Services Alliance | Other | 3 | £230k | 0.0% | 2022-04-01 |
| University Hospitals Birmingham NHS Foundation Trust | Other | 1 | £223k | 0.0% | 2023-10-20 |
| Mining Remediation AuthorityNew | Other | 1 | £217k | 0.0% | 2025-12-23 |
| DCH | Other | 1 | £194k | 0.0% | 2017-06-26 |
| Department of Health & Social Care | Other | 1 | £167k | 0.0% | 2024-05-03 |
| NORTH TYNESIDE COUNCIL | Other | 1 | £153k | 0.0% | 2023-02-16 |
| Care Quality Commission | Other | 1 | £150k | 0.0% | 2019-01-23 |
| Leeds City Council | Other | 1 | £100k | 0.0% | 2018-04-06 |
| Mitie (Facilities Management) Ltd | Other | 1 | £85k | 0.0% | 2023-05-23 |
| Department for Transport | Other | 1 | £84k | 0.0% | 2018-05-31 |
| Darlington Borough Council | Other | 2 | £68k | 0.0% | 2019-01-31 |
| Radioactive Waste Management Limited | Other | 1 | £65k | 0.0% | 2021-04-01 |
| EA | Other | 1 | £57k | 0.0% | 2024-01-10 |
| Wychavon District Council | Other | 1 | £47k | 0.0% | 2018-12-28 |
| London Fire BrigadeNew | Other | 2 | £45k | 0.0% | 2024-06-26 |
| Pension Protection FundNew | Other | 1 | £30k | 0.0% | 2025-11-27 |
| NHS South West - Acutes | Other | 1 | £25k | 0.0% | 2020-12-03 |
| DERBY CITY COUNCIL | Other | 1 | £10k | 0.0% | 2016-06-08 |
| Port of DoverNew | Other | 2 | £0k | 0.0% | 2026-05-04 |
| University for the Creative Arts | Other | 2 | £0k | 0.0% | 2024-01-16 |
| LEASEGUARD GROUP LIMITED | Other | 1 | £0k | 0.0% | 2016-11-23 |
| Centro | Other | 1 | £0k | 0.0% | 2016-06-07 |
| Bernicia Group | Other | 1 | £0k | 0.0% | 2016-01-31 |
| Royal Borough of Kingston Upon Thames | Other | 2 | £0k | 0.0% | |
| Disclosure Scotland | Other | 1 | £0k | 0.0% | |
| Surrey and Borders Partnership NHS Foundation Trust on behalf of NHS Commercial Solutions | Other | 1 | £0k | 0.0% | |
| Oasis Community Learning | Other | 2 | £0k | 0.0% | |
| Caerphilly County Borough Council | Other | 1 | £0k | 0.0% | |
| North of England Commercial Procurement Collaborative (NOE CPC) (hosted by and acting through Leeds and York Partnership NHS Foundation Trust.) | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 12 | £0k | 0.0% | |
| NATIONAL GRID UK LIMITED | Other | 2 | £0k | 0.0% | |
| Forestry and Land Scotland | Other | 2 | £0k | 0.0% | |
| London Borough of Bromley | Other | 1 | £0k | 0.0% | |
| NHS Greater Glasgow and Clyde | Other | 2 | £0k | 0.0% | |
| Community Health Partnerships Limited | Other | 1 | £0k | 0.0% | |
| Police, Fire & Crime Commissioner for Staffordshire | Other | 1 | £0k | 0.0% | |
| Edinburgh Napier University | Other | 1 | £0k | 0.0% | |
| Alder Hey | Other | 1 | £0k | 0.0% | |