| Crown Commercial Service | Other | 14 | £93m | 23.4% | 2024-04-19 |
| Post Office Limited | Other | 2 | £81m | 20.4% | 2016-01-21 |
| Espo | Other | 17 | £61m | 15.3% | 2021-08-23 |
| Ministry of Defence | Other | 3 | £46m | 11.6% | 2024-03-07 |
| ANGLIAN WATER SERVICES LIMITEDNew | Other | 1 | £25m | 6.3% | 2025-09-10 |
| London Ambulance Service NHS Trust | Other | 3 | £10m | 2.6% | 2026-05-05 |
| DERBY CITY COUNCIL | Other | 2 | £9m | 2.4% | 2025-07-18 |
| Ministry of Justice | Other | 2 | £8m | 2.0% | 2024-04-09 |
| Environment Agency | Other | 1 | £7m | 1.7% | 2024-02-29 |
| South East Coast Ambulance Service NHS Foundation TrustNew | Other | 1 | £7m | 1.7% | 2026-03-24 |
| Nuclear Restoration Services LimitedNew | Other | 1 | £5m | 1.2% | 2026-04-01 |
| Wolverhampton City Council | Other | 1 | £4m | 1.1% | 2021-09-29 |
| Coventry City Council | Other | 1 | £4m | 1.0% | 2023-02-14 |
| UK RESEARCH & INNOVATION | Other | 3 | £4m | 1.0% | 2024-07-12 |
| Police and Crime Commissioner for Lincolnshire | Other | 2 | £3m | 0.6% | 2024-09-11 |
| Leicester City CouncilNew | Other | 2 | £2m | 0.6% | 2024-12-24 |
| Atomic Weapons EstablishmentNew | Other | 1 | £2m | 0.5% | 2024-07-16 |
| West Sussex County Council | Other | 4 | £2m | 0.5% | 2026-03-25 |
| Leicestershire County CouncilNew | Other | 2 | £2m | 0.4% | 2025-08-11 |
| Suffolk Coastal District Council and Waveney District CouncilNew | Other | 1 | £2m | 0.4% | 2025-04-25 |
| Royal Berkshire Fire Authority | Other | 2 | £2m | 0.4% | 2024-03-28 |
| Oxford Council Direct Services | Other | 1 | £2m | 0.4% | 2022-10-01 |
| Staffordshire County Council | Other | 1 | £2m | 0.4% | 2021-08-12 |
| oneSource | Other | 1 | £2m | 0.4% | 2021-01-13 |
| MOD Logistics Delivery OC Defence Fuels Acquisition Programme | Other | 1 | £1m | 0.3% | 2021-03-04 |
| West Midlands Fire Service | Other | 1 | £1m | 0.3% | 2022-03-30 |
| Chelmsford City CouncilNew | Other | 2 | £1m | 0.3% | 2025-06-12 |
| Horsham District CouncilNew | Other | 1 | £980k | 0.2% | 2025-05-01 |
| Royal Berkshire Fire & Rescue ServiceNew | Other | 1 | £950k | 0.2% | 2026-03-27 |
| North Yorkshire Fire & Rescue Service | Other | 1 | £883k | 0.2% | 2024-02-26 |
| Lancashire County Council | Other | 1 | £800k | 0.2% | 2021-10-15 |
| Nuneaton & Bedworth Borough Council | Other | 1 | £770k | 0.2% | 2021-12-16 |
| Sandwell Metropolitan Borough Council | Other | 1 | £750k | 0.2% | 2021-09-09 |
| Broxtowe Borough Council | Other | 2 | £690k | 0.2% | 2024-11-22 |
| Surrey County CouncilNew | Other | 1 | £600k | 0.2% | 2026-03-05 |
| Ryedale District Council | Other | 1 | £480k | 0.1% | 2021-11-19 |
| City of London Corporation | Other | 1 | £470k | 0.1% | 2022-12-19 |
| Buckinghamshire and Milton Keynes Fire Authority | Other | 1 | £400k | 0.1% | 2022-03-17 |
| Wiltshire Fire And Rescue Service | Other | 3 | £397k | 0.1% | 2024-02-15 |
| Lincolnshire County Council | Other | 1 | £373k | 0.1% | 2022-09-30 |
| North Northamptonshire CouncilNew | Other | 2 | £260k | 0.1% | 2026-04-28 |
| Fylde Borough Council | Other | 1 | £250k | 0.1% | 2021-09-06 |
| Devon and Somerset Fire and Rescue Authority | Other | 1 | £220k | 0.1% | 2023-12-10 |
| TRINITY HOUSE | Other | 4 | £217k | 0.1% | 2022-03-31 |
| Greener Ealing LtdNew | Other | 1 | £210k | 0.1% | 2025-11-07 |
| Crawley Borough CouncilNew | Other | 1 | £205k | 0.1% | 2025-05-01 |
| Gloucestershire Health and Care NHS Foundation TrustNew | Other | 1 | £200k | 0.1% | 2026-02-25 |
| Bath and North East Somerset Council | Other | 1 | £200k | 0.1% | 2024-03-28 |
| Gloucestershire Hospitals NHS Foundation Trust | Other | 1 | £164k | 0.0% | 2024-03-20 |
| East Riding of Yorkshire CouncilNew | Other | 2 | £142k | 0.0% | 2026-03-09 |
| East Sussex Healthcare NHS TrustNew | Other | 1 | £142k | 0.0% | 2024-06-18 |
| Salisbury NHS Foundation TrustNew | Other | 1 | £130k | 0.0% | 2026-03-25 |
| Northern Lighthouse Board | Other | 3 | £125k | 0.0% | 2023-05-19 |
| Royal United Hospitals, Bath NHS Foundation TrustNew | Other | 1 | £120k | 0.0% | 2026-03-31 |
| Northumbria Healthcare NHS Foundation TrustNew | Other | 1 | £108k | 0.0% | 2025-12-03 |
| London Borough of Hillingdon | Other | 1 | £89k | 0.0% | 2024-04-01 |
| West Hertfordshire Teaching Hospitals NHS TrustNew | Other | 1 | £85k | 0.0% | 2026-03-31 |
| London Borough of Barking and Dagenham | Other | 1 | £78k | 0.0% | 2019-09-02 |
| West Hertfordshire Hospitals NHS Trust | Other | 1 | £76k | 0.0% | 2022-04-06 |
| Sussex Community NHS Foundation Trust | Other | 1 | £68k | 0.0% | 2024-05-01 |
| DRIVER & VEHICLE LICENSING AGENCYNew | Other | 1 | £65k | 0.0% | 2024-06-10 |
| Department for Work & Pensions | Other | 1 | £52k | 0.0% | 2024-03-20 |
| Leicestershire Partnership NHS Trust | Other | 1 | £50k | 0.0% | 2022-10-31 |
| Stevenage Borough Council | Other | 1 | £36k | 0.0% | 2023-05-18 |
| UK Health Security Agency | Other | 1 | £35k | 0.0% | 2022-08-11 |
| Cambridgeshire County CouncilNew | Other | 1 | £34k | 0.0% | 2024-07-17 |
| Nuclear Waste Services LimitedNew | Other | 1 | £32k | 0.0% | 2025-05-19 |
| County Durham and Darlington NHS Foundation TrustNew | Other | 1 | £30k | 0.0% | 2026-02-19 |
| Lancashire Constabulary | Other | 1 | £19k | 0.0% | 2021-12-31 |
| Leicestershire County Council, trading as ESPONew | Other | 9 | £0k | 0.0% | 2025-12-12 |
| London Borough Of Islington | Other | 2 | £0k | 0.0% | |
| NHS Wales Shared Services Partnership (hosted by Velindre University NHS Trust) | Other | 4 | £0k | 0.0% | |
| Dorset & Wiltshire Fire and Rescue Authority | Other | 1 | £0k | 0.0% | |
| Portsmouth City Council | Other | 2 | £0k | 0.0% | |
| East Sussex County Council | Other | 1 | £0k | 0.0% | |
| SOUTHERN WATER SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| NHS Sussex ICB | Other | 1 | £0k | 0.0% | |
| The Police and Crime Commissioner for Surrey | Other | 1 | £0k | 0.0% | |
| OXFORD DIRECT SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| UK Research & Innovation | Other | 2 | £0k | 0.0% | |
| YPO | Other | 25 | £0k | 0.0% | |
| Kent County Council T/a LASER | Other | 1 | £0k | 0.0% | |
| NHS Blood and Transplant (NHSBT) | Other | 1 | £0k | 0.0% | |
| The Association of North East Councils Limited | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a LASER Energy) | Other | 1 | £0k | 0.0% | |
| Pembrokeshire County Council | Other | 2 | £0k | 0.0% | |
| South Yorkshire Fire and Rescue Authority | Other | 1 | £0k | 0.0% | |
| Ferguson Marine (Port Glasgow) Ltd | Other | 1 | £0k | 0.0% | |
| Southend-on-Sea City Council | Other | 1 | £0k | 0.0% | |