| The Association of North East Councils Limited | Other | 3 | £21m | 26.4% | 2025-02-03 |
| BIP SOLUTIONS LIMITEDNew | Other | 1 | £10m | 12.6% | 2024-07-02 |
| Espo | Other | 9 | £8m | 9.7% | 2022-03-21 |
| Yorkshire Purchasing Organisation | Other | 1 | £8m | 9.3% | 2023-09-12 |
| SEVERN TRENT WATER LIMITEDNew | Other | 1 | £5m | 6.1% | 2026-04-17 |
| Hertfordshire County Council | Other | 2 | £3m | 3.5% | 2023-03-17 |
| Dorset Council | Other | 3 | £3m | 3.3% | 2024-09-04 |
| Nottingham City Council | Other | 3 | £2m | 2.7% | 2024-10-16 |
| East Riding of Yorkshire CouncilNew | Other | 2 | £2m | 2.5% | 2025-12-16 |
| WAKEFIELD COUNCIL | Other | 2 | £2m | 2.3% | 2023-09-04 |
| Commercial Services Kent Limited | Other | 2 | £2m | 2.3% | 2021-06-15 |
| UBICO LIMITED | Other | 6 | £2m | 2.1% | 2025-03-24 |
| London Borough Of Islington | Other | 2 | £1m | 1.4% | 2025-12-12 |
| Neath Port Talbot County Borough Council | Other | 4 | £977k | 1.2% | 2024-01-30 |
| Alliance Environmental Services Ltd | Other | 1 | £608k | 0.7% | 2024-03-14 |
| Somerset County Council | Other | 1 | £594k | 0.7% | 2024-01-16 |
| Flintshire County CouncilNew | Other | 2 | £588k | 0.7% | 2025-06-13 |
| Fylde Borough Council | Other | 2 | £574k | 0.7% | 2025-10-03 |
| South Kesteven District CouncilNew | Other | 1 | £521k | 0.6% | 2026-02-24 |
| Blackburn With Darwen Borough Council | Other | 2 | £497k | 0.6% | 2023-04-06 |
| Kirklees Council | Other | 2 | £489k | 0.6% | 2023-03-17 |
| Newark & Sherwood District Council | Other | 2 | £464k | 0.6% | 2026-05-07 |
| St Helens Council | Other | 1 | £453k | 0.6% | 2024-04-15 |
| North East Lincolnshire Council | Other | 2 | £432k | 0.5% | 2022-10-05 |
| Lancashire County Council | Other | 1 | £422k | 0.5% | 2023-03-09 |
| DfI Transport and Road Asset Management (TRAM)New | Other | 2 | £412k | 0.5% | 2026-01-23 |
| Redcar and Cleveland Borough CouncilNew | Other | 1 | £394k | 0.5% | 2025-02-07 |
| Ceredigion County CouncilNew | Other | 1 | £381k | 0.5% | 2024-09-23 |
| Stafford Borough CouncilNew | Other | 1 | £374k | 0.5% | 2026-03-23 |
| Crawley Borough Council | Other | 1 | £373k | 0.5% | 2022-06-17 |
| Durham County Council | Other | 1 | £368k | 0.5% | 2024-01-16 |
| Chelmsford City CouncilNew | Other | 1 | £356k | 0.4% | 2026-04-14 |
| London Borough of Redbridge | Other | 1 | £300k | 0.4% | 2021-05-07 |
| City of Bradford Metropolitan District Council | Other | 2 | £294k | 0.4% | 2022-08-19 |
| Pembrokeshire County Council | Other | 1 | £288k | 0.4% | 2020-12-01 |
| Leicester City Council | Other | 2 | £286k | 0.4% | 2021-08-10 |
| Huntingdonshire District Council | Other | 2 | £284k | 0.3% | 2022-01-26 |
| Wyre Council | Other | 1 | £279k | 0.3% | 2024-01-22 |
| New Forest District Council | Other | 1 | £247k | 0.3% | 2021-01-06 |
| Cherwell District CouncilNew | Other | 1 | £246k | 0.3% | 2025-08-29 |
| Brighton and Hove City Council | Other | 2 | £226k | 0.3% | 2022-05-16 |
| Wigan CouncilNew | Other | 1 | £191k | 0.2% | 2024-09-06 |
| North East Lincolnshire Borough CouncilNew | Other | 1 | £186k | 0.2% | 2025-04-28 |
| Colchester City Council | Other | 1 | £176k | 0.2% | 2024-03-10 |
| Bath and North East Somerset Council | Other | 1 | £168k | 0.2% | 2022-10-19 |
| Newark And Sherwood District Council | Other | 1 | £147k | 0.2% | 2021-12-22 |
| Newcastle-under-Lyme Borough Council | Other | 1 | £141k | 0.2% | 2020-12-17 |
| Ministry of Defence | Other | 1 | £123k | 0.2% | 2021-12-21 |
| Knowsley Council | Other | 1 | £82k | 0.1% | 2022-05-06 |
| London Borough of Hackney | Other | 1 | £20k | 0.0% | 2021-03-01 |
| Borough Council of Kings Lynn and West NorfolkNew | Other | 3 | £0k | 0.0% | 2025-08-21 |
| Sellafield Limited | Other | 1 | £0k | 0.0% | |
| City & County of Swansea | Other | 1 | £0k | 0.0% | |
| Halton Housing c/o Link Group | Other | 1 | £0k | 0.0% | |
| Antrim and Newtownabbey Borough Council | Other | 2 | £0k | 0.0% | |
| YPO | Other | 9 | £0k | 0.0% | |
| Scotland Excel | Other | 7 | £0k | 0.0% | |
| Kent County Council (t/a KCS Procurement Services) | Other | 2 | £0k | 0.0% | |