| Central Housing Investment Consortium Limited ("CHIC") | Other | 2 | £27m | 35.3% | 2021-03-16 |
| Nuclear Restoration Services Limited (Dounreay) | Other | 2 | £10m | 12.3% | 2024-03-26 |
| Fusion21 Members Consortium | Other | 5 | £8m | 10.9% | 2025-04-15 |
| UNITED UTILITIES WATER LIMITEDNew | Other | 1 | £8m | 10.0% | 2025-12-18 |
| RESTORATION AND RENEWAL DELIVERY AUTHORITY LTD | Other | 2 | £4m | 5.7% | 2021-12-16 |
| South East Consortium | Other | 1 | £3m | 4.3% | 2020-08-26 |
| Environment Agency | Other | 2 | £3m | 3.5% | 2024-07-30 |
| DEFRA | Other | 5 | £2m | 2.6% | 2024-03-08 |
| East Riding of Yorkshire Council | Other | 2 | £1m | 1.6% | 2023-10-06 |
| Leicestershire County Council | Other | 2 | £1m | 1.4% | 2023-12-06 |
| KIER TRANSPORTATION LIMITED | Other | 1 | £1m | 1.3% | 2024-02-09 |
| Wiltshire Council | Other | 2 | £1m | 1.3% | 2021-09-01 |
| Transport for Wales Rail Limited (Utility Buyer)New | Other | 3 | £674k | 0.9% | 2025-07-11 |
| Dorset Council | Other | 2 | £667k | 0.9% | 2021-01-26 |
| Gateshead Council | Other | 1 | £640k | 0.8% | 2022-11-17 |
| The Coal Authority | Other | 3 | £535k | 0.7% | 2023-10-18 |
| BIP SOLUTIONS LIMITED | Other | 1 | £520k | 0.7% | 2022-09-21 |
| UNIVERSITY OF DERBYNew | Other | 1 | £500k | 0.6% | 2025-05-29 |
| Surrey and Borders Partnership NHS Foundation Trust | Other | 1 | £476k | 0.6% | 2023-11-30 |
| NHS Wales Shared Services Partnership (hosted by Velindre University NHS Trust)New | Other | 2 | £381k | 0.5% | 2025-12-19 |
| UK Research and Innovation | Other | 2 | £350k | 0.5% | 2022-06-28 |
| Shropshire CouncilNew | Other | 1 | £349k | 0.5% | 2024-05-30 |
| PROCURE PLUS HOLDINGS LIMITED | Other | 1 | £234k | 0.3% | 2018-10-22 |
| Durham County Council | Other | 2 | £224k | 0.3% | 2023-01-17 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 2 | £202k | 0.3% | 2021-06-17 |
| City of Doncaster CouncilNew | Other | 1 | £200k | 0.3% | 2025-05-23 |
| South Yorkshire Police and Crime Commissioner | Other | 3 | £197k | 0.3% | 2021-07-29 |
| UNIVERSITY OF EAST ANGLIA | Other | 3 | £178k | 0.2% | 2021-12-01 |
| Yorwaste Ltd | Other | 1 | £128k | 0.2% | 2018-05-21 |
| DfTc - Department for TransportNew | Other | 1 | £125k | 0.2% | 2024-10-22 |
| Knowsley Council | Other | 1 | £125k | 0.2% | 2020-02-24 |
| Bournemouth Christchurch and Poole Council | Other | 1 | £119k | 0.2% | 2021-10-22 |
| The Hillingdon Hospitals NHS Foundation Trust | Other | 1 | £105k | 0.1% | 2021-09-05 |
| Home Office | Other | 1 | £90k | 0.1% | 2024-04-17 |
| Department for Environment Food & Rural Affairs | Other | 2 | £61k | 0.1% | |
| Nursing And Midwifery Council | Other | 2 | £57k | 0.1% | 2023-10-05 |
| Kirklees Council | Other | 1 | £55k | 0.1% | 2020-10-11 |
| UK RESEARCH & INNOVATION | Other | 1 | £50k | 0.1% | 2022-12-20 |
| National Highways | Other | 3 | £47k | 0.1% | 2021-11-26 |
| West Northamptonshire Council | Other | 1 | £40k | 0.1% | 2023-02-03 |
| Ferrovial Construction UK LtdNew | Other | 1 | £39k | 0.1% | 2025-04-01 |
| Hampshire County Council | Other | 1 | £35k | 0.0% | 2021-04-13 |
| NHS Property Services Limited | Other | 1 | £29k | 0.0% | 2022-12-05 |
| SocotecNew | Other | 1 | £29k | 0.0% | 2024-12-16 |
| East Hampshire District Council | Other | 2 | £26k | 0.0% | 2021-06-17 |
| Nuclear Waste Services LimitedNew | Other | 2 | £0k | 0.0% | 2026-03-10 |
| Pagabo | Other | 1 | £0k | 0.0% | 2024-04-12 |
| United Kingdom Atomic Energy Authority | Other | 1 | £0k | 0.0% | 2019-04-30 |
| MAG AIRPORT LIMITED | Other | 1 | £0k | 0.0% | |
| Scottish Borders Housing Association Ltd | Other | 2 | £0k | 0.0% | |
| ENVIRONMENT AGENCY (Defra Network eTendering Portal) | Other | 2 | £0k | 0.0% | |
| HS2 | Other | 1 | £0k | 0.0% | |
| LHC Procurement Group | Other | 2 | £0k | 0.0% | |
| The City of Edinburgh Council | Other | 2 | £0k | 0.0% | |
| Police & Crime Commissioner for South Wales | Other | 1 | £0k | 0.0% | |
| Southern Water Services Ltd. | Other | 1 | £0k | 0.0% | |
| WESTERN POWER DISTRIBUTION PLC | Other | 1 | £0k | 0.0% | |
| Govia Thameslink Rail (GTR) | Other | 2 | £0k | 0.0% | |
| Scottish Hydro Electric Power Distribution Plc | Other | 1 | £0k | 0.0% | |
| Herefordshire Council | Other | 1 | £0k | 0.0% | |
| QE Facilities Ltd | Other | 1 | £0k | 0.0% | |
| APUC Limited | Other | 1 | £0k | 0.0% | |