| Leicestershire County Council | Other | 9 | £712m | 76.8% | 2023-10-30 |
| London Borough of BromleyNew | Other | 3 | £36m | 3.9% | 2025-09-17 |
| CROYDON COUNCIL | Other | 2 | £26m | 2.8% | 2021-02-11 |
| Ministry of Justice | Other | 7 | £15m | 1.6% | 2024-02-19 |
| Surrey County Council | Other | 1 | £15m | 1.6% | 2023-12-28 |
| Department for Education | Other | 6 | £14m | 1.5% | 2023-01-19 |
| Isle of Wight Council | Other | 6 | £10m | 1.1% | 2025-09-10 |
| Bristol City Council | Other | 3 | £10m | 1.1% | 2024-03-12 |
| Cumbria County Council | Other | 2 | £9m | 0.9% | 2019-10-17 |
| Leeds City Council | Other | 10 | £8m | 0.8% | 2023-12-19 |
| Lincolnshire County Council | Other | 2 | £8m | 0.8% | 2025-03-31 |
| Peterborough City Council | Other | 2 | £7m | 0.7% | 2024-04-16 |
| Bradford Metropolitan District Council | Other | 2 | £5m | 0.6% | 2017-12-18 |
| Manchester City Council | Other | 3 | £5m | 0.5% | 2021-08-27 |
| East of England NHS collaborative Procurement HubNew | Other | 12 | £4m | 0.5% | 2025-11-28 |
| South of England Procurement Centre | Other | 1 | £3m | 0.3% | 2022-12-02 |
| Caerphilly County Borough CouncilNew | Other | 3 | £3m | 0.3% | 2025-12-10 |
| London Borough of Sutton | Other | 4 | £3m | 0.3% | 2022-08-25 |
| Avon & Somerset Constabulary | Other | 1 | £2m | 0.3% | 2017-06-29 |
| NHS England | Other | 8 | £2m | 0.2% | 2023-12-12 |
| Kent County Council | Other | 5 | £2m | 0.2% | 2024-01-03 |
| Liverpool City Council | Other | 1 | £2m | 0.2% | 2022-08-09 |
| North East Lincolnshire Council | Other | 4 | £2m | 0.2% | 2018-09-07 |
| Warwickshire Police & West Mercia Police Procurement & Contracts Department | Other | 1 | £1m | 0.1% | 2018-12-27 |
| East Riding of Yorkshire Council | Other | 8 | £1m | 0.1% | 2024-07-30 |
| Redcar and Cleveland Borough Council | Other | 3 | £1m | 0.1% | 2022-05-03 |
| N E L Commissioning Support Unit NHSE | Other | 1 | £1m | 0.1% | 2023-04-04 |
| NHS SOUTH, CENTRAL AND WEST COMMISSIONING SUPPORT UNIT | Other | 1 | £1m | 0.1% | 2023-03-31 |
| Northamptonshire County Council | Other | 1 | £1m | 0.1% | 2018-04-03 |
| WAKEFIELD COUNCIL | Other | 1 | £1m | 0.1% | 2020-03-10 |
| Wakefield Council Customer Service | Other | 1 | £991k | 0.1% | 2018-03-28 |
| Neath Port Talbot County Borough CouncilNew | Other | 2 | £965k | 0.1% | 2026-01-05 |
| Construction Industry Training Board | Other | 3 | £938k | 0.1% | 2022-08-16 |
| Warwickshire Police | Other | 1 | £831k | 0.1% | 2022-12-20 |
| London Borough of Redbridge | Other | 2 | £824k | 0.1% | 2018-08-24 |
| Darlington Borough Council | Other | 9 | £817k | 0.1% | 2024-04-06 |
| Sandwell Metropolitan Borough Council | Other | 2 | £750k | 0.1% | 2026-03-25 |
| Star Procurement | Other | 1 | £746k | 0.1% | 2016-01-01 |
| Barnsley Metropolitan Borough Council | Other | 5 | £736k | 0.1% | 2023-04-04 |
| Devon County Council | Other | 1 | £680k | 0.1% | 2019-03-01 |
| Halton Borough Council | Other | 2 | £660k | 0.1% | 2020-12-18 |
| Gloucestershire County Council | Other | 6 | £637k | 0.1% | 2022-06-30 |
| Rochdale Metropolitan Borough Council | Other | 1 | £620k | 0.1% | 2019-03-28 |
| NHS North East London Integrated Care BoardNew | Other | 2 | £600k | 0.1% | 2025-07-15 |
| Wiltshire Council | Other | 1 | £570k | 0.1% | 2019-01-01 |
| Wolverhampton City Council | Other | 2 | £539k | 0.1% | 2026-05-14 |
| City of Bradford Metropolitan District CouncilNew | Other | 5 | £508k | 0.1% | 2026-01-20 |
| Torbay Council | Other | 2 | £420k | 0.0% | 2024-11-19 |
| London Borough of Hackney | Other | 1 | £398k | 0.0% | 2024-02-06 |
| DERBY CITY COUNCIL | Other | 1 | £386k | 0.0% | 2017-03-31 |
| Medway CouncilNew | Other | 1 | £353k | 0.0% | 2026-01-29 |
| Somerset County Council | Other | 1 | £339k | 0.0% | 2021-10-29 |
| NORTH TYNESIDE COUNCIL | Other | 4 | £289k | 0.0% | 2021-05-04 |
| Tower Hamlets | Other | 1 | £267k | 0.0% | 2019-04-05 |
| Borough of Telford & WrekinNew | Other | 1 | £240k | 0.0% | 2025-12-11 |
| Durham County Council | Other | 2 | £239k | 0.0% | 2017-11-30 |
| NHS South Yorkshire Integrated Care BoardNew | Other | 1 | £237k | 0.0% | 2026-02-18 |
| London Borough of Hounslow | Other | 1 | £197k | 0.0% | 2023-10-23 |
| Hampshire County CouncilNew | Other | 2 | £164k | 0.0% | 2027-10-05 |
| Attain | Other | 1 | £163k | 0.0% | 2021-03-08 |
| Gateshead Council | Other | 1 | £150k | 0.0% | 2016-07-27 |
| Sefton Council | Other | 1 | £125k | 0.0% | 2023-10-31 |
| CHESHIRE EAST COUNCIL | Other | 1 | £125k | 0.0% | 2018-08-07 |
| South Tyneside Council | Other | 2 | £113k | 0.0% | 2017-10-30 |
| DUDLEY MBCNew | Other | 1 | £48k | 0.0% | 2026-02-19 |
| DONCASTER CHILDREN'S SERVICES TRUST LIMITED | Other | 1 | £46k | 0.0% | 2020-03-31 |
| Dorset county Council | Other | 1 | £43k | 0.0% | 2018-09-06 |
| North Lincolnshire Council | Other | 1 | £41k | 0.0% | 2022-07-26 |
| Cumberland CouncilNew | Other | 3 | £41k | 0.0% | 2025-03-28 |
| Middlesbrough Council | Other | 1 | £36k | 0.0% | 2017-04-28 |
| Sunderland City Council | Other | 1 | £35k | 0.0% | 2019-10-29 |
| North Northamptonshire CouncilNew | Other | 1 | £25k | 0.0% | 2024-08-29 |
| Stockton Borough Council | Other | 1 | £23k | 0.0% | 2020-09-30 |
| Sheffield City Council | Other | 1 | £17k | 0.0% | 2021-01-11 |
| Buckinghamshire Council | Other | 2 | £5k | 0.0% | 2018-03-26 |
| Derbyshire County CouncilNew | Other | 1 | £0k | 0.0% | 2026-01-23 |
| BIRMINGHAM CHILDREN'S TRUST COMMUNITY INTEREST COMPANYNew | Other | 1 | £0k | 0.0% | 2026-01-15 |
| Newcastle City Council | Other | 2 | £0k | 0.0% | 2022-05-24 |
| NOE CPC | Other | 1 | £0k | 0.0% | 2020-04-24 |
| Blackpool Council | Other | 1 | £0k | 0.0% | 2019-07-18 |
| Supply Hertfordshire | Other | 1 | £0k | 0.0% | 2018-03-13 |
| Portsmouth City Council | Other | 1 | £0k | 0.0% | 2017-04-13 |
| Essex County Council | Other | 1 | £0k | 0.0% | |
| Glasgow City Council | Other | 5 | £0k | 0.0% | |
| Dudley Metropolitan Borough Council | Other | 1 | £0k | 0.0% | |
| Clackmannanshire Council | Other | 2 | £0k | 0.0% | |
| NHS GLOUCESTERSHIRE INTEGRATED CARE BOARD | Other | 1 | £0k | 0.0% | |
| The City of Edinburgh Council | Other | 16 | £0k | 0.0% | |
| Falkirk Council | Other | 4 | £0k | 0.0% | |
| East Renfrewshire Council | Other | 1 | £0k | 0.0% | |
| Swansea Council | Other | 3 | £0k | 0.0% | |
| Cumbria, Northumberland, Tyne and Wear NHS Foundation Trust | Other | 3 | £0k | 0.0% | |
| West Lothian Council | Other | 4 | £0k | 0.0% | |
| NHS Leicester, Leicestershire and Rutland ICB | Other | 1 | £0k | 0.0% | |
| NHS HAMPSHIRE AND ISLE OF WIGHT ICB | Other | 1 | £0k | 0.0% | |
| Scottish Prison Service | Other | 1 | £0k | 0.0% | |
| NORFOLK AND SUFFOLK NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| Powys County Council | Other | 1 | £0k | 0.0% | |
| Denbighshire County Council | Other | 5 | £0k | 0.0% | |
| Dumfries and Galloway Council | Other | 3 | £0k | 0.0% | |
| North Lanarkshire Council | Other | 6 | £0k | 0.0% | |
| Rhondda Cynon Taf CBC | Other | 3 | £0k | 0.0% | |
| Pembrokeshire County Council | Other | 1 | £0k | 0.0% | |
| South Ayrshire Council | Other | 2 | £0k | 0.0% | |
| Greater Manchester Combined Authority - GMP | Other | 1 | £0k | 0.0% | |
| Education Scotland | Other | 1 | £0k | 0.0% | |
| Northamptonshire Children's Trust | Other | 2 | £0k | 0.0% | |
| Scottish Government | Other | 2 | £0k | 0.0% | |
| East Lothian Council | Other | 1 | £0k | 0.0% | |
| NHS Lanarkshire | Other | 1 | £0k | 0.0% | |
| Angus Council | Other | 4 | £0k | 0.0% | |
| MERSEY CARE NHS FOUNDATION TRUST | Other | 2 | £0k | 0.0% | |
| Coventry City Council | Other | 1 | £0k | 0.0% | |
| Cyngor Bwrdeistref Sirol Merthyr Tudful Merthyr Tydfil County Borough Council | Other | 1 | £0k | 0.0% | |
| NI Public Health Agency | Other | 2 | £0k | 0.0% | |
| Nottingham City Council | Other | 1 | £0k | 0.0% | |
| North East and North Cumbria Integrated Care Board | Other | 1 | £0k | 0.0% | |
| North Ayrshire Council | Other | 1 | £0k | 0.0% | |
| NHS Frimley ICB | Other | 1 | £0k | 0.0% | |
| Civic Centre | Other | 2 | £0k | 0.0% | |
| NHS SUFFOLK AND NORTH EAST ESSEX INTEGRATED CARE BOARD | Other | 1 | £0k | 0.0% | |
| London Borough of Newham | Other | 1 | £0k | 0.0% | |
| NHS Lancashire and South Cumbria Integrated Care Board | Other | 1 | £0k | 0.0% | |
| NHS South East London Integrated Care Board | Other | 1 | £0k | 0.0% | |
| NHS NORTH CENTRAL LONDON INTEGRATED CARE BOARD | Other | 2 | £0k | 0.0% | |
| COUNTESS OF CHESTER HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| East Ayrshire Council | Other | 1 | £0k | 0.0% | |
| NHS CHESHIRE AND MERSEYSIDE INTEGRATED CARE BOARD | Other | 1 | £0k | 0.0% | |
| Welsh Government | Other | 1 | £0k | 0.0% | |
| Cardiff Council | Other | 1 | £0k | 0.0% | |
| Scotland Excel | Other | 2 | £0k | 0.0% | |
| Skills Development Scotland Co. Limited | Other | 1 | £0k | 0.0% | |
| Stockton on Tees Borough Council | Other | 1 | £0k | 0.0% | |
| Worcestershire County Council | Other | 1 | £0k | 0.0% | |
| The Newcastle Upon Tyne Hospitals NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Western Health and Social Care Trust | Other | 3 | £0k | 0.0% | |
| Education Authority NI | Other | 1 | £0k | 0.0% | |
| The Police & Crime Commissioner for Warwickshire | Other | 1 | £0k | 0.0% | |