| Nottinghamshire County Council | Other | 3 | £43m | 48.6% | 2025-09-30 |
| Birmingham City Council | Other | 4 | £10m | 11.5% | 2022-02-03 |
| Gloucestershire County Council | Other | 3 | £7m | 7.3% | 2022-08-10 |
| Norfolk County Council | Other | 3 | £5m | 5.1% | 2024-04-03 |
| East Sussex County Council | Other | 2 | £3m | 3.3% | 2024-04-01 |
| Tower Hamlets | Other | 3 | £2m | 2.0% | 2021-06-14 |
| SE Shared Services | Other | 2 | £2m | 1.9% | 2020-04-16 |
| Wolverhampton City Council | Other | 3 | £2m | 1.8% | 2022-02-14 |
| Islington | Other | 1 | £2m | 1.8% | 2016-04-21 |
| London Borough of Lewisham | Other | 3 | £1m | 1.7% | 2022-03-30 |
| Buckinghamshire Council | Other | 3 | £1m | 1.6% | 2021-06-04 |
| Walsall Council e-Tendering | Other | 1 | £1m | 1.4% | 2022-08-12 |
| Sandwell Metropolitan Borough Council | Other | 7 | £1m | 1.4% | 2024-02-28 |
| London Borough of Barnet | Other | 2 | £1m | 1.3% | 2020-12-07 |
| Haringey Council | Other | 1 | £1m | 1.2% | 2018-10-01 |
| Supply Hertfordshire | Other | 1 | £970k | 1.1% | 2018-05-08 |
| Bath and North East Somerset Council | Other | 1 | £913k | 1.0% | 2020-07-10 |
| London Borough of Brent | Other | 2 | £801k | 0.9% | 2023-06-27 |
| Leicestershire County Council | Other | 3 | £722k | 0.8% | 2025-08-26 |
| London Borough of Southwark | Other | 1 | £530k | 0.6% | 2018-12-07 |
| Borough of Telford & Wrekin | Other | 1 | £525k | 0.6% | 2019-07-16 |
| North Lincolnshire Council | Other | 2 | £512k | 0.6% | 2022-10-24 |
| Department of Health and Social Care (DHSC) | Other | 2 | £502k | 0.6% | 2023-10-26 |
| HS2 | Other | 2 | £421k | 0.5% | 2022-06-30 |
| Royal Borough of Greenwich | Other | 1 | £400k | 0.4% | 2023-03-16 |
| Thurrock Council | Other | 1 | £268k | 0.3% | 2016-06-01 |
| Telford and Wrekin Council | Other | 1 | £198k | 0.2% | 2016-02-01 |
| Nottingham City Council | Other | 2 | £158k | 0.2% | 2025-06-18 |
| Telford & Wrekin Council | Other | 1 | £149k | 0.2% | 2016-09-01 |
| General Medical Council (GMC)New | Other | 1 | £130k | 0.1% | 2025-04-02 |
| Southend-on-sea Borough Council | Other | 1 | £101k | 0.1% | 2016-09-20 |
| London Borough of Waltham Forest | Other | 1 | £100k | 0.1% | 2019-01-17 |
| West Northamptonshire CouncilNew | Other | 3 | £0k | 0.0% | 2025-12-05 |
| North Northamptonshire CouncilNew | Other | 2 | £0k | 0.0% | 2025-07-21 |
| Hertfordshire County Council - Adult Care Services | Other | 1 | £0k | 0.0% | 2024-04-08 |
| Surrey County Council | Other | 1 | £0k | 0.0% | 2024-02-28 |
| Central Bedfordshire Council | Other | 1 | £0k | 0.0% | 2017-04-24 |
| Hertfordshire County Council | Other | 1 | £0k | 0.0% | |
| Department of Health & Social Care | Other | 1 | £0k | 0.0% | |
| Nottinghamshire Healthcare NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| NHS England | Other | 1 | £0k | 0.0% | |
| Nursing And Midwifery Council | Other | 8 | £0k | 0.0% | |
| Peterborough City Council | Other | 2 | £0k | 0.0% | |
| Borough Council of Calderdale | Other | 1 | £0k | 0.0% | |
| Bristol City Council | Other | 1 | £0k | 0.0% | |
| Walsall Metropolitan Borough Council | Other | 1 | £0k | 0.0% | |