| Crown Commercial Service | Other | 2 | £1.1bn | 44.3% | 2020-09-22 |
| Yorkshire Purchasing Organisation | Other | 2 | £1.0bn | 40.5% | 2023-07-19 |
| The Association of North East Councils Limited | Other | 2 | £300m | 12.2% | 2020-12-01 |
| Together Housing Association LimitedNew | Other | 1 | £16m | 0.6% | 2026-02-02 |
| Manchester City Council | Other | 4 | £10m | 0.4% | 2025-01-28 |
| City of London Corporation | Other | 1 | £8m | 0.3% | 2021-11-25 |
| Rotherham Metropolitan Borough Council | Other | 2 | £6m | 0.2% | 2024-11-29 |
| Halton Borough Council | Other | 2 | £5m | 0.2% | 2026-01-08 |
| Oldham Council | Other | 1 | £4m | 0.2% | 2022-06-17 |
| Brighton and Hove City Council | Other | 1 | £3m | 0.1% | 2022-02-20 |
| East Sussex County CouncilNew | Other | 1 | £3m | 0.1% | 2024-08-01 |
| London Borough of Merton | Other | 2 | £3m | 0.1% | 2024-10-25 |
| Southern HousingNew | Other | 2 | £2m | 0.1% | 2025-01-14 |
| UNIVERSITY OF SOUTHAMPTON | Other | 1 | £2m | 0.1% | 2022-01-26 |
| University of HertfordshireNew | Other | 1 | £2m | 0.1% | 2024-10-11 |
| University of Lincoln | Other | 1 | £2m | 0.1% | 2020-03-17 |
| UK Health Security Agency | Other | 2 | £2m | 0.1% | 2023-03-24 |
| London Borough of Barking and Dagenham | Other | 1 | £2m | 0.1% | 2018-04-26 |
| London Borough of Camden | Other | 1 | £1m | 0.0% | 2022-03-22 |
| London Fire Brigade | Other | 1 | £894k | 0.0% | 2018-04-30 |
| Royal Borough of Kingston Upon ThamesNew | Other | 1 | £771k | 0.0% | 2024-09-01 |
| Westmorland and Furness CouncilNew | Other | 1 | £700k | 0.0% | 2024-10-22 |
| Royal Borough of Kensington and ChelseaNew | Other | 2 | £537k | 0.0% | 2025-08-15 |
| Oxford City Council | Other | 1 | £470k | 0.0% | 2017-12-15 |
| ASTON UNIVERSITY MATHEMATICS SCHOOL | Other | 1 | £466k | 0.0% | 2023-08-04 |
| Runnymede Borough CouncilNew | Other | 1 | £423k | 0.0% | 2024-07-26 |
| UNIVERSITY OF GLOUCESTERSHIRE | Other | 1 | £373k | 0.0% | 2022-04-04 |
| Royal Berkshire Fire & Rescue ServiceNew | Other | 1 | £250k | 0.0% | 2025-05-09 |
| Erewash Borough Council | Other | 1 | £194k | 0.0% | 2022-12-11 |
| EU SUPPLY LIMITED | Other | 1 | £167k | 0.0% | 2023-03-31 |
| London Ambulance Service NHS Trust | Other | 1 | £136k | 0.0% | 2023-07-18 |
| Fylde Borough Council | Other | 1 | £131k | 0.0% | 2021-06-14 |
| Devon and Somerset Fire and Rescue Authority | Other | 2 | £128k | 0.0% | 2024-08-29 |
| North Yorkshire Fire & Rescue Service | Other | 1 | £110k | 0.0% | 2023-04-17 |
| FIDELITY ENERGY LIMITED | Other | 1 | £0k | 0.0% | |
| Wolverhampton City Council | Other | 1 | £0k | 0.0% | |
| DUDLEY MBC | Other | 1 | £0k | 0.0% | |
| London Universities Purchasing Consortium | Other | 1 | £0k | 0.0% | |
| Secretary of State for Health and Social Care acting as part of the Crown through UK Health Security Agency | Other | 1 | £0k | 0.0% | |
| East Suffolk Council | Other | 1 | £0k | 0.0% | |
| North Northamptonshire Council | Other | 1 | £0k | 0.0% | |