| YPO | Other | 16 | £42m | 44.8% | 2025-06-26 |
| Crown Commercial Service | Other | 1 | £20m | 21.4% | 2020-03-30 |
| UK Research and InnovationNew | Other | 4 | £10m | 10.7% | 2025-08-18 |
| The Association of North East Councils Limited | Other | 2 | £6m | 6.1% | 2021-08-10 |
| Leicestershire County Council, trading as ESPONew | Other | 4 | £5m | 5.3% | 2026-02-12 |
| N H S Shared Business Services | Other | 1 | £3m | 3.2% | 2024-02-27 |
| Espo | Other | 2 | £1m | 1.2% | 2017-12-05 |
| North of England Commercial Procurement Collaborative (NOE CPC) | Other | 1 | £1m | 1.1% | 2021-01-04 |
| NHS Supply Chain | Other | 2 | £1m | 1.1% | 2024-12-23 |
| STUDENT LOANS COMPANY LIMITEDNew | Other | 1 | £905k | 1.0% | 2025-02-21 |
| Kirklees Council | Other | 3 | £899k | 1.0% | 2026-04-09 |
| MCA - Maritime and Coastguard AgencyNew | Other | 1 | £668k | 0.7% | 2026-02-05 |
| Leicestershire PoliceNew | Other | 1 | £500k | 0.5% | 2025-06-24 |
| South Yorkshire Police Headquarters | Other | 1 | £316k | 0.3% | 2017-03-12 |
| London Borough of Enfield | Other | 1 | £250k | 0.3% | 2018-08-17 |
| Luminate Education GroupNew | Other | 2 | £244k | 0.3% | 2025-12-10 |
| HM Land Registry | Other | 1 | £208k | 0.2% | 2020-09-18 |
| Derbyshire County CouncilNew | Other | 1 | £200k | 0.2% | 2025-04-29 |
| Ministry of DefenceNew | Other | 1 | £119k | 0.1% | 2025-02-03 |
| The Insolvency ServiceNew | Other | 1 | £100k | 0.1% | 2025-01-28 |
| COLLEGE OF POLICING LIMITED | Other | 1 | £90k | 0.1% | 2022-02-02 |
| NHS SOUTH, CENTRAL AND WEST COMMISSIONING SUPPORT UNIT | Other | 1 | £89k | 0.1% | 2022-01-10 |
| Surrey and Borders Partnership NHS Foundation Trust | Other | 1 | £56k | 0.1% | 2024-04-30 |
| The Charity Commission For England And Wales | Other | 1 | £50k | 0.1% | 2024-03-19 |
| TEC PartnershipNew | Other | 1 | £39k | 0.0% | 2026-03-24 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 1 | £31k | 0.0% | 2023-03-29 |
| Leicester City CouncilNew | Other | 1 | £22k | 0.0% | 2025-01-14 |
| SUPPLY CHAIN COORDINATION LIMITEDNew | Other | 8 | £0k | 0.0% | 2025-10-10 |
| Defence Science and Technology LaboratoryNew | Other | 1 | £0k | 0.0% | 2025-02-21 |
| Foreign Commonwealth and Development Office | Other | 1 | £0k | 0.0% | |
| The Police and Crime Commissioner for Leicestershire | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a KCS) | Other | 1 | £0k | 0.0% | |
| NHS Supply Chain operated by North of England Commercial Procurement Collaborative (who are hosted by Leeds and York Partnership NHS Foundation Trust) acting on behalf of Supply Chain Coordination Ltd | Other | 1 | £0k | 0.0% | |
| Leeds Teaching Hospitals NHS Trust | Other | 1 | £0k | 0.0% | |
| Herts Fullstop Ltd | Other | 5 | £0k | 0.0% | |
| Hampshire County Council | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 5 | £0k | 0.0% | |
| NHS Supply Chain Coordination | Other | 1 | £0k | 0.0% | |
| Bradford Teaching Hospitals NHS Foundation Trust | Other | 2 | £0k | 0.0% | |