| CRESCENT PURCHASING LIMITEDNew | Other | 1 | £700m | 27.1% | 2026-04-29 |
| Ministry of Defence | Other | 1 | £426m | 16.5% | 2022-03-31 |
| EspoNew | Other | 2 | £400m | 15.5% | 2025-12-18 |
| Ministry of Justice | Other | 4 | £306m | 11.8% | 2025-06-16 |
| Shropshire CouncilNew | Other | 2 | £100m | 3.9% | 2024-10-15 |
| Cumbria, Northumberland, Tyne and Wear NHS Foundation TrustNew | Other | 4 | £99m | 3.8% | 2025-02-28 |
| The Mayor and Commonalty and Citizens of the City of LondonNew | Other | 2 | £82m | 3.2% | 2025-04-15 |
| Lancashire County Council | Other | 3 | £62m | 2.4% | 2023-08-08 |
| Hampshire County Council | Other | 2 | £51m | 2.0% | 2026-03-20 |
| Leicester City Council | Other | 1 | £50m | 1.9% | 2023-06-21 |
| Gwynedd Council | Other | 5 | £50m | 1.9% | 2020-04-01 |
| CIRRUS PURCHASING LTDNew | Other | 5 | £42m | 1.6% | 2024-12-17 |
| University of Essex | Other | 1 | £41m | 1.6% | 2023-03-17 |
| Department for Work & Pensions | Other | 1 | £29m | 1.1% | 2021-12-01 |
| Southampton City Council | Other | 2 | £29m | 1.1% | 2024-09-30 |
| DUDLEY MBC | Other | 2 | £26m | 1.0% | 2023-03-15 |
| Bristol City Council | Other | 2 | £24m | 0.9% | 2023-10-09 |
| DEFRA | Other | 5 | £16m | 0.6% | 2025-05-06 |
| Cirrus Primary Academy Trust | Other | 2 | £10m | 0.4% | 2022-05-17 |
| BANK OF ENGLAND | Other | 1 | £9m | 0.4% | 2024-02-08 |
| Nottinghamshire County Council | Other | 1 | £5m | 0.2% | 2022-03-30 |
| Bracknell Forest Borough CouncilNew | Other | 1 | £4m | 0.1% | 2025-11-25 |
| Department for Environment Food & Rural AffairsNew | Other | 1 | £3m | 0.1% | 2026-03-19 |
| Crawley Borough Council | Other | 1 | £3m | 0.1% | 2023-09-20 |
| South Kesteven District CouncilNew | Other | 1 | £3m | 0.1% | 2024-07-01 |
| HM Land Registry | Other | 2 | £2m | 0.1% | 2025-03-31 |
| Staffordshire County CouncilNew | Other | 1 | £2m | 0.1% | 2024-09-27 |
| Police and Crime Commissioner for LincolnshireNew | Other | 1 | £1m | 0.1% | 2025-09-15 |
| Folkestone and Hythe District Council | Other | 1 | £1m | 0.1% | 2024-03-28 |
| Mole Valley District CouncilNew | Other | 1 | £1m | 0.0% | 2024-09-20 |
| Welland Procurement Unit | Other | 1 | £1m | 0.0% | 2023-11-27 |
| UK Research & Innovation | Other | 1 | £900k | 0.0% | 2022-01-31 |
| Horsham District Council | Other | 1 | £846k | 0.0% | 2023-11-09 |
| Chesterfield Borough Council | Other | 1 | £750k | 0.0% | 2024-03-19 |
| Flagship Housing GroupNew | Other | 2 | £540k | 0.0% | 2024-08-22 |
| Mid Sussex District Council | Other | 1 | £400k | 0.0% | 2023-09-19 |
| Environment Agency | Other | 1 | £352k | 0.0% | 2023-04-13 |
| Fylde Borough Council | Other | 1 | £320k | 0.0% | 2023-02-06 |
| DERBY HOMES LIMITED | Other | 1 | £308k | 0.0% | 2023-03-01 |
| Intellectual Property Office | Other | 1 | £150k | 0.0% | 2022-01-14 |
| Rother District CouncilNew | Other | 1 | £54k | 0.0% | 2025-10-15 |
| Cafcass | Other | 1 | £40k | 0.0% | 2022-04-01 |
| GOVERNMENT PROPERTY AGENCY | Other | 1 | £35k | 0.0% | 2024-02-27 |
| UNIVERSITY OF EAST ANGLIANew | Other | 1 | £0k | 0.0% | 2026-03-18 |
| SOUTH WEST ESSEX COMMUNITY EDUCATION TRUST LIMITEDNew | Other | 4 | £0k | 0.0% | 2025-04-17 |
| Greater Manchester Combined Authority - GMP | Other | 1 | £0k | 0.0% | |
| Dukefield Energy Limited | Other | 2 | £0k | 0.0% | |
| FIRST TRENITALIA WEST COAST RAIL LIMITED | Other | 1 | £0k | 0.0% | |
| Scottish Government | Other | 1 | £0k | 0.0% | |
| North Northamptonshire Council | Other | 1 | £0k | 0.0% | |
| South East Coast Ambulance Service NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| The Police and Crime Commissioner for Surrey | Other | 1 | £0k | 0.0% | |
| Maidstone Grammar School For Girls | Other | 1 | £0k | 0.0% | |
| Outwood Grange Academies Trust | Other | 1 | £0k | 0.0% | |
| Torus62 Limited | Other | 1 | £0k | 0.0% | |
| CLARION HOUSING GROUP LIMITED | Other | 1 | £0k | 0.0% | |
| The Guinness Partnership | Other | 1 | £0k | 0.0% | |
| The Riverside Group | Other | 1 | £0k | 0.0% | |
| Paradigm Housing Group | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a LASER Energy) | Other | 1 | £0k | 0.0% | |
| Isle of Wight Council | Other | 1 | £0k | 0.0% | |