| National Highways Limited | Other | 8 | £141m | 35.4% | 2021-04-01 |
| NETWORK RAIL INFRASTRUCTURE LIMITEDNew | Other | 1 | £103m | 26.0% | 2026-04-14 |
| Derbyshire County CouncilNew | Other | 2 | £38m | 9.6% | 2025-09-29 |
| Environment Agency (Defra Group Commercial) | Other | 1 | £22m | 5.6% | 2024-03-01 |
| E E M Ltd | Other | 1 | £19m | 4.8% | 2024-01-19 |
| National Highways | Other | 7 | £9m | 2.2% | 2022-01-17 |
| Fusion21 Members Consortium | Other | 2 | £7m | 1.6% | 2022-06-07 |
| Beyond Housing Limited | Other | 2 | £6m | 1.4% | 2022-12-13 |
| Peabody Trust | Other | 1 | £5m | 1.3% | 2018-07-01 |
| RAND ASSOCIATES CONSULTANCY SERVICES LIMITED | Other | 1 | £5m | 1.3% | 2021-08-25 |
| Environment Agency | Other | 22 | £4m | 1.0% | 2026-04-28 |
| DEFRA | Other | 12 | £3m | 0.8% | 2026-04-30 |
| Nottinghamshire County CouncilNew | Other | 1 | £3m | 0.8% | 2025-02-03 |
| The Royal Parks LtdNew | Other | 4 | £3m | 0.7% | 2024-10-31 |
| English Heritage-Estates | Other | 2 | £3m | 0.7% | 2023-05-05 |
| East Staffordshire Borough Council | Other | 2 | £2m | 0.5% | 2023-07-28 |
| London Borough of HarrowNew | Other | 1 | £2m | 0.5% | 2024-09-05 |
| Espo | Other | 4 | £2m | 0.5% | 2021-01-04 |
| EANew | Other | 1 | £2m | 0.4% | 2024-07-01 |
| Staffordshire County Council | Other | 2 | £2m | 0.4% | 2022-06-14 |
| London Borough of BarnetNew | Other | 1 | £1m | 0.4% | 2024-09-05 |
| Birmingham City Council | Other | 1 | £1m | 0.3% | 2019-11-05 |
| Hertfordshire County Council - Growth and EnvironmentNew | Other | 1 | £1m | 0.3% | 2025-07-29 |
| London Borough of Hounslow | Other | 3 | £1m | 0.3% | 2025-07-15 |
| Stoke-on-Trent City Council | Other | 3 | £1m | 0.3% | 2021-09-21 |
| Buckingham Town CouncilNew | Other | 1 | £990k | 0.2% | 2025-03-05 |
| London Borough of Hackney | Other | 2 | £943k | 0.2% | 2022-01-14 |
| London Borough of CamdenNew | Other | 2 | £666k | 0.2% | 2024-12-31 |
| Department for Transport | Other | 3 | £628k | 0.2% | 2020-04-01 |
| London Borough of Hillingdon | Other | 2 | £583k | 0.1% | 2024-02-05 |
| Leicester City CouncilNew | Other | 2 | £582k | 0.1% | 2025-08-29 |
| Nuneaton and Bedworth BC (NUN) | Other | 2 | £510k | 0.1% | 2025-03-04 |
| Sheffield Teaching Hospitals NHS Foundation Trust | Other | 1 | £500k | 0.1% | 2017-04-24 |
| Islington | Other | 1 | £480k | 0.1% | 2017-08-01 |
| DERBY CITY COUNCIL | Other | 2 | £455k | 0.1% | 2021-09-28 |
| London Borough of WandsworthNew | Other | 1 | £337k | 0.1% | 2025-09-23 |
| City of Doncaster Council | Other | 1 | £325k | 0.1% | 2022-10-31 |
| ENGIE SERVICES LIMITED | Other | 1 | £310k | 0.1% | 2021-03-22 |
| Board of Trustees of the Royal Botanic Gardens Kew | Other | 2 | £300k | 0.1% | 2021-04-09 |
| Knowsley Council | Other | 1 | £278k | 0.1% | 2017-08-31 |
| Knowsley Metropolitan Borough Council | Other | 1 | £278k | 0.1% | 2017-08-31 |
| 7 Forces Commercial Services | Other | 1 | £250k | 0.1% | 2022-02-20 |
| Worthing Borough CouncilNew | Other | 1 | £236k | 0.1% | 2024-06-05 |
| QUADRANT CONSTRUCTION SERVICES LIMITED | Other | 2 | £212k | 0.1% | 2018-08-17 |
| University Hospitals of Leicester NHS Trust | Other | 1 | £200k | 0.1% | 2021-10-26 |
| CHESHIRE EAST COUNCIL | Other | 2 | £180k | 0.0% | 2024-02-26 |
| Keele University | Other | 1 | £169k | 0.0% | 2018-10-05 |
| Forestry Commission | Other | 3 | £155k | 0.0% | 2021-03-29 |
| DgCNew | Other | 1 | £155k | 0.0% | 2025-05-05 |
| GREENSQUAREACCORD LIMITEDNew | Other | 3 | £152k | 0.0% | 2025-05-16 |
| Royal Botanical Gardens, Kew | Other | 2 | £150k | 0.0% | 2022-02-04 |
| Southend City Council | Other | 1 | £149k | 0.0% | 2023-07-26 |
| Lincolnshire Housing Partnership | Other | 1 | £147k | 0.0% | 2022-04-01 |
| Met Office | Other | 3 | £144k | 0.0% | 2025-11-24 |
| UNIVERSITY OF SOUTHAMPTON | Other | 1 | £108k | 0.0% | 2017-07-11 |
| The National Maritime Museum | Other | 1 | £90k | 0.0% | 2019-09-20 |
| Milton Keynes Council | Other | 1 | £87k | 0.0% | 2023-04-01 |
| BANK OF ENGLAND | Other | 1 | £71k | 0.0% | 2019-10-23 |
| Nuneaton & Bedworth Borough CouncilNew | Other | 1 | £70k | 0.0% | 2025-03-04 |
| Nuneaton & Bedworth BC (NUN) | Other | 1 | £50k | 0.0% | 2022-10-27 |
| HOMES & COMMUNITIES AGENCY | Other | 1 | £47k | 0.0% | 2013-06-03 |
| Karbon Homes | Other | 1 | £43k | 0.0% | 2018-04-30 |
| LEEDS TRINITY UNIVERSITYNew | Other | 1 | £40k | 0.0% | 2024-08-14 |
| Office of Rail and Road | Other | 1 | £11k | 0.0% | 2022-09-26 |
| East Suffolk Council | Other | 1 | £7k | 0.0% | 2023-02-10 |
| South Downs National Park Authority | Other | 1 | £0k | 0.0% | 2023-04-24 |
| Avon and Wiltshire Mental Health Partnership NHS trust | Other | 1 | £0k | 0.0% | 2022-12-16 |
| Telford & Wrekin Council | Other | 1 | £0k | 0.0% | 2020-11-04 |
| Lancaster University | Other | 1 | £0k | 0.0% | 2017-06-09 |
| Durham County Council | Other | 1 | £0k | 0.0% | 2017-04-04 |
| Dorset county Council | Other | 1 | £0k | 0.0% | 2016-08-02 |
| NATIONAL GRID ELECTRICITY DISTRIBUTION PLC | Other | 1 | £0k | 0.0% | |
| Network Rail Infrastructure Ltd | Other | 2 | £0k | 0.0% | |
| Forestry Commission, acting through Forestry England (hereinafter referred to as Forestry England) | Other | 8 | £0k | 0.0% | |
| ENVIRONMENT AGENCY (Defra Network eTendering Portal) | Other | 2 | £0k | 0.0% | |
| English Heritage Trust | Other | 1 | £0k | 0.0% | |
| Aster Property Limited | Other | 1 | £0k | 0.0% | |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITED | Other | 1 | £0k | 0.0% | |
| East of England Ambulance Service NHS Trust Headquarters | Other | 1 | £0k | 0.0% | |
| Cardiff Council | Other | 1 | £0k | 0.0% | |
| South Staffordshire Council | Other | 1 | £0k | 0.0% | |
| Natural Resources Wales | Other | 2 | £0k | 0.0% | |
| YPO | Other | 1 | £0k | 0.0% | |
| EFFICIENCY EAST MIDLANDS LIMITED | Other | 1 | £0k | 0.0% | |
| NORTHUMBRIAN WATER LIMITED | Other | 2 | £0k | 0.0% | |
| SCOTIA GAS NETWORKS LIMITED | Other | 5 | £0k | 0.0% | |
| The Police & Crime Commissioner for Sussex | Other | 1 | £0k | 0.0% | |
| Southern Electric Power Distribution plc | Other | 4 | £0k | 0.0% | |
| The Chief Constable for Devon and Cornwall Police | Other | 1 | £0k | 0.0% | |
| University of South Wales | Other | 1 | £0k | 0.0% | |
| Cardiff University | Other | 1 | £0k | 0.0% | |
| Devon County Council | Other | 1 | £0k | 0.0% | |
| South Wales Fire and Rescue Service | Other | 1 | £0k | 0.0% | |
| Medway Council | Other | 1 | £0k | 0.0% | |
| Edinburgh Napier University | Other | 1 | £0k | 0.0% | |
| North Lanarkshire Council | Other | 2 | £0k | 0.0% | |
| Cassiltoun Housing Association Ltd. | Other | 1 | £0k | 0.0% | |
| NUNEATON AND BEDWORTH COMMUNITY ENTERPRISES LIMITED | Other | 2 | £0k | 0.0% | |
| North Lincolnshire Council | Other | 1 | £0k | 0.0% | |