| Environment Agency | Other | 17 | £215m | 57.8% | 2026-05-05 |
| ANGLIAN WATER SERVICES LIMITEDNew | Other | 1 | £29m | 7.8% | 2025-11-19 |
| Hyde Housing Association Ltd | Other | 2 | £22m | 6.0% | 2024-05-20 |
| N H S Shared Business Services | Other | 1 | £17m | 4.6% | 2023-12-13 |
| DfTc - Department for Transport | Other | 2 | £16m | 4.3% | 2023-07-10 |
| Hull City Council | Other | 7 | £15m | 4.1% | 2026-02-04 |
| Great Places Housing GroupNew | Other | 3 | £15m | 3.9% | 2024-06-15 |
| Homes England (the name adopted by the Homes and Communities Agency) | Other | 11 | £14m | 3.7% | 2025-11-11 |
| Espo | Other | 16 | £10m | 2.8% | 2024-01-31 |
| GREATER MANCHESTER EDUCATION TRUSTNew | Other | 6 | £3m | 0.8% | 2025-04-15 |
| Hampshire County Council | Other | 33 | £3m | 0.8% | 2026-03-24 |
| L&Q Housing TrustNew | Other | 1 | £2m | 0.6% | 2025-02-24 |
| The Association of North East Councils Limited | Other | 2 | £1m | 0.3% | 2022-11-29 |
| National Highways | Other | 1 | £841k | 0.2% | 2023-06-20 |
| Leicestershire County Council | Other | 2 | £700k | 0.2% | 2021-11-18 |
| PROSPER | Other | 3 | £685k | 0.2% | 2024-01-08 |
| Oxford City Council | Other | 4 | £574k | 0.2% | 2025-06-03 |
| BBC (British Broadcasting Corporation) | Other | 2 | £462k | 0.1% | 2023-05-17 |
| Notting Hill Genesis | Other | 2 | £458k | 0.1% | 2022-06-09 |
| HCC - Resources | Other | 1 | £420k | 0.1% | 2021-08-24 |
| Surrey County Council | Other | 3 | £373k | 0.1% | 2025-08-04 |
| Peterborough City Council | Other | 2 | £363k | 0.1% | 2021-07-21 |
| capitalEsourcing | Other | 1 | £323k | 0.1% | 2020-12-04 |
| Somerset West and Taunton Council | Other | 1 | £300k | 0.1% | 2022-01-31 |
| Wyre Council | Other | 1 | £290k | 0.1% | 2022-05-31 |
| Redcar and Cleveland Borough Council | Other | 1 | £268k | 0.1% | 2024-02-28 |
| Cambridgeshire County CouncilNew | Other | 1 | £266k | 0.1% | 2025-04-14 |
| Forestry Commission | Other | 1 | £250k | 0.1% | 2021-06-01 |
| UNIVERSITY OF SUSSEX(THE) | Other | 1 | £228k | 0.1% | 2022-12-31 |
| Plymouth City Council | Other | 2 | £150k | 0.0% | 2022-04-04 |
| Blackburn With Darwen Borough Council | Other | 2 | £145k | 0.0% | 2024-02-20 |
| Wolverhampton City Council | Other | 2 | £140k | 0.0% | 2023-08-10 |
| Staffordshire County Council | Other | 3 | £139k | 0.0% | 2024-10-03 |
| LLW Repository Limited t/a Nuclear Waste Services | Other | 1 | £135k | 0.0% | 2023-10-20 |
| DEFRA | Other | 2 | £132k | 0.0% | 2023-11-29 |
| Epping Forest District Council | Other | 3 | £126k | 0.0% | 2023-04-30 |
| North Somerset Council | Other | 2 | £112k | 0.0% | 2024-03-12 |
| Thurrock Borough Council - Anti Social Behaviour | Other | 1 | £100k | 0.0% | 2024-04-01 |
| Rotherham Metropolitan Borough Council | Other | 1 | £90k | 0.0% | 2023-02-10 |
| Manchester City CouncilNew | Other | 1 | £89k | 0.0% | 2026-01-27 |
| CROYDON COUNCILNew | Other | 1 | £88k | 0.0% | 2024-09-11 |
| Dartford Borough Council | Other | 2 | £80k | 0.0% | 2024-07-10 |
| Brighton and Hove City Council | Other | 1 | £79k | 0.0% | 2020-05-19 |
| Sedgemoor District Council | Other | 1 | £75k | 0.0% | 2022-04-04 |
| Cambridgeshire and Peterborough Combined Authority | Other | 1 | £73k | 0.0% | 2023-11-03 |
| Swindon Borough Council | Other | 1 | £67k | 0.0% | 2023-07-14 |
| London Borough of Enfield | Other | 1 | £65k | 0.0% | 2023-04-14 |
| Office for Environmental Protection | Other | 1 | £62k | 0.0% | 2023-02-02 |
| West Northamptonshire Council | Other | 1 | £50k | 0.0% | 2022-03-10 |
| Department for Environment Food & Rural Affairs | Other | 1 | £49k | 0.0% | 2023-06-20 |
| Tees Valley Combined AuthorityNew | Other | 1 | £48k | 0.0% | 2025-12-11 |
| Ebbsfleet Development Corporation | Other | 1 | £43k | 0.0% | 2021-09-01 |
| Stroud District Council | Other | 1 | £40k | 0.0% | 2022-01-18 |
| Oxfordshire County Council | Other | 2 | £38k | 0.0% | 2022-05-11 |
| Fylde Borough Council | Other | 1 | £37k | 0.0% | 2021-06-28 |
| London Borough of Sutton | Other | 1 | £36k | 0.0% | 2022-07-05 |
| London Borough of Newham | Other | 1 | £35k | 0.0% | 2021-09-24 |
| Wirral Borough CouncilNew | Other | 1 | £34k | 0.0% | 2024-06-30 |
| Peabody Trust | Other | 1 | £32k | 0.0% | 2024-05-01 |
| Sandwell Metropolitan Borough Council | Other | 1 | £29k | 0.0% | 2023-01-05 |
| City of London Corporation | Other | 1 | £29k | 0.0% | 2022-03-03 |
| Stratford-on-Avon District Council | Other | 1 | £27k | 0.0% | 2024-04-23 |
| Wealden District Council | Other | 1 | £25k | 0.0% | 2023-06-21 |
| Stevenage Borough Council | Other | 1 | £25k | 0.0% | 2024-01-01 |
| Stockport Metropolitan Borough Council | Other | 1 | £23k | 0.0% | 2023-07-25 |
| The West of England Combined AuthorityNew | Other | 1 | £18k | 0.0% | 2024-12-02 |
| West Suffolk NHS Foundation TrustNew | Other | 1 | £0k | 0.0% | 2026-04-17 |
| Kingston University Higher Education CorporationNew | Other | 2 | £0k | 0.0% | 2026-04-02 |
| Scottish Hydro Electric Power Distribution PlcNew | Other | 1 | £0k | 0.0% | 2025-12-22 |
| Hampshire and Isle of Wight Fire and Rescue Authority New | Other | 2 | £0k | 0.0% | 2025-11-06 |
| Hertfordshire County Council - Environment | Other | 1 | £0k | 0.0% | 2023-08-17 |
| Blackpool Council | Other | 1 | £0k | 0.0% | 2022-06-08 |
| Board of Trustees of the Royal Botanic Gardens Kew | Other | 1 | £0k | 0.0% | |
| WESSEX WATER SERVICES LIMITED | Other | 3 | £0k | 0.0% | |
| TAMESIDE METROPOLITAN BOROUGH COUNCIL | Other | 1 | £0k | 0.0% | |
| UNITED UTILITIES WATER LIMITED | Other | 1 | £0k | 0.0% | |
| Falkirk Council | Other | 1 | £0k | 0.0% | |
| DWR CYMRU CYFYNGEDIG | Other | 1 | £0k | 0.0% | |
| Communities & Housing Investment Consortium Ltd (CHIC) | Other | 1 | £0k | 0.0% | |
| Canal & River Trust | Other | 1 | £0k | 0.0% | |
| Southern Water Services Ltd. | Other | 2 | £0k | 0.0% | |
| Scottish Government | Other | 2 | £0k | 0.0% | |
| Transport for Wales | Other | 1 | £0k | 0.0% | |
| Hertfordshire County Council | Other | 2 | £0k | 0.0% | |
| THE CHANCELLOR MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE | Other | 1 | £0k | 0.0% | |
| UNIVERSITY OF EAST ANGLIA | Other | 1 | £0k | 0.0% | |
| Department for Transport | Other | 1 | £0k | 0.0% | |
| LONDON & QUADRANT HOUSING TRUST | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| Wessex Water Services Ltd | Other | 1 | £0k | 0.0% | |
| South Ayrshire Council | Other | 1 | £0k | 0.0% | |
| Strathclyde Partnership for Transport | Other | 4 | £0k | 0.0% | |
| Transport Scotland | Other | 2 | £0k | 0.0% | |
| NI Water and its subsidiaries | Other | 2 | £0k | 0.0% | |
| SEVERN TRENT WATER LIMITED | Other | 1 | £0k | 0.0% | |
| Platform4 Rail Regeneration LImited | Other | 1 | £0k | 0.0% | |
| West Midlands Combined Authority | Other | 1 | £0k | 0.0% | |
| Scottish Water | Other | 1 | £0k | 0.0% | |
| THAMES WATER UTILITIES LIMITED | Other | 2 | £0k | 0.0% | |
| ENVIRONMENT AGENCY (Defra Network eTendering Portal) | Other | 1 | £0k | 0.0% | |
| Oxford Direct Services | Other | 1 | £0k | 0.0% | |
| Wirral Council | Other | 1 | £0k | 0.0% | |
| LHC | Other | 4 | £0k | 0.0% | |
| NORTHUMBRIAN WATER LIMITED | Other | 1 | £0k | 0.0% | |
| North Ayrshire Council | Other | 2 | £0k | 0.0% | |
| Portsmouth City Council | Other | 1 | £0k | 0.0% | |
| UNITED KINGDOM NATIONAL NUCLEAR LABORATORY LIMITED | Other | 1 | £0k | 0.0% | |
| Middlesbrough Council | Other | 1 | £0k | 0.0% | |