| Department for Energy Security & Net Zero | Other | 14 | £41m | 26.2% | 2025-06-06 |
| DEFRA | Other | 60 | £24m | 15.4% | 2024-11-28 |
| N H S Shared Business Services | Other | 1 | £17m | 10.5% | 2023-11-07 |
| NHS Commercial SolutionsNew | Other | 1 | £14m | 8.8% | 2024-09-01 |
| Department for Environment Food & Rural Affairs | Other | 30 | £13m | 8.2% | 2026-03-03 |
| Environment AgencyNew | Other | 19 | £8m | 4.8% | 2026-01-20 |
| Business Energy and Industrial Strategy | Other | 13 | £7m | 4.2% | 2024-01-18 |
| Espo | Other | 3 | £4m | 2.7% | 2024-01-31 |
| Ofgem | Other | 5 | £4m | 2.7% | 2022-09-01 |
| The Department for Business, Energy and Industrial Strategy (BEIS) | Other | 2 | £4m | 2.5% | 2021-04-30 |
| Health and Safety ExecutiveNew | Other | 2 | £3m | 2.0% | 2025-08-22 |
| DfTc - Department for Transport | Other | 11 | £3m | 1.7% | 2026-04-17 |
| Waste & Resources Action Programme | Other | 15 | £2m | 1.2% | 2025-09-01 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 11 | £2m | 1.2% | 2024-12-11 |
| NE | Other | 5 | £920k | 0.6% | 2023-08-29 |
| Natural England | Other | 19 | £918k | 0.6% | 2025-11-26 |
| MCA - Maritime and Coastguard Agency | Other | 3 | £861k | 0.5% | 2024-10-14 |
| UK RESEARCH & INNOVATION | Other | 3 | £634k | 0.4% | 2025-02-12 |
| CTM Portal for the NDA Shared Services Alliance | Other | 1 | £490k | 0.3% | 2022-03-28 |
| Northern Ireland Fire and Rescue ServiceNew | Other | 3 | £480k | 0.3% | 2025-02-27 |
| PALLADIUM INTERNATIONAL LIMITEDNew | Other | 3 | £435k | 0.3% | 2026-02-01 |
| Department for TransportNew | Other | 3 | £428k | 0.3% | 2025-10-27 |
| RAIL SAFETY AND STANDARDS BOARD LIMITEDNew | Other | 2 | £373k | 0.2% | 2025-03-13 |
| Salford City Council | Other | 2 | £367k | 0.2% | 2021-08-13 |
| Crown Commercial Service | Other | 6 | £362k | 0.2% | 2022-11-18 |
| GREATER MANCHESTER EDUCATION TRUST | Other | 2 | £284k | 0.2% | 2023-09-27 |
| Department of Energy and Climate Change | Other | 2 | £282k | 0.2% | 2016-04-29 |
| London Borough of Hillingdon | Other | 3 | £268k | 0.2% | 2023-12-01 |
| Bradford Metropolitan District Council | Other | 3 | £261k | 0.2% | 2020-06-29 |
| SALIX FINANCE LTDNew | Other | 2 | £233k | 0.1% | 2026-04-16 |
| West Northamptonshire CouncilNew | Other | 1 | £230k | 0.1% | 2024-11-07 |
| JNCC SUPPORT CONew | Other | 2 | £220k | 0.1% | 2024-08-08 |
| Magnox Limited | Other | 2 | £211k | 0.1% | 2023-11-24 |
| Committee on Climate Change | Other | 4 | £200k | 0.1% | 2023-02-02 |
| Surrey County CouncilNew | Other | 1 | £199k | 0.1% | 2026-02-24 |
| Department for Business, Energy & Industrial Strategy | Other | 3 | £186k | 0.1% | 2023-01-24 |
| Mid Sussex District Council | Other | 3 | £182k | 0.1% | 2025-09-25 |
| WRAP (Waste and Resources Action Programme)New | Other | 11 | £181k | 0.1% | 2025-09-01 |
| North Yorkshire County Council | Other | 1 | £168k | 0.1% | 2024-04-09 |
| Ministry of Defence | Other | 3 | £166k | 0.1% | 2024-06-06 |
| Department for Business & TradeNew | Other | 1 | £165k | 0.1% | 2025-01-29 |
| EA | Other | 2 | £164k | 0.1% | 2023-11-28 |
| Royal Borough of Kingston Upon Thames | Other | 1 | £156k | 0.1% | 2024-05-17 |
| City of Bradford Metropolitan District CouncilNew | Other | 1 | £150k | 0.1% | 2024-09-27 |
| BANK OF ENGLAND | Other | 2 | £149k | 0.1% | 2023-01-24 |
| HM TreasuryNew | Other | 1 | £146k | 0.1% | 2024-07-29 |
| Office for Environmental Protection | Other | 2 | £143k | 0.1% | 2023-12-07 |
| Hampshire County CouncilNew | Other | 2 | £135k | 0.1% | 2026-03-24 |
| Luton Council | Other | 2 | £118k | 0.1% | 2021-10-15 |
| Waverley Borough Council | Other | 2 | £110k | 0.1% | 2023-11-15 |
| Oxford City Council | Other | 1 | £108k | 0.1% | 2022-05-24 |
| Wokingham Borough Council | Other | 1 | £104k | 0.1% | 2024-01-16 |
| Ricardo AEA Limited | Other | 1 | £97k | 0.1% | 2023-02-20 |
| BIP SOLUTIONS LIMITEDNew | Other | 1 | £94k | 0.1% | 2025-08-18 |
| Epping Forest District Council | Other | 1 | £92k | 0.1% | 2022-09-15 |
| London Waste And Recycling Board | Other | 1 | £81k | 0.1% | 2021-06-15 |
| ENERGY SYSTEMS CATAPULT | Other | 1 | £80k | 0.1% | 2018-02-19 |
| SE Shared Services | Other | 1 | £72k | 0.0% | 2017-07-17 |
| North Northamptonshire Council | Other | 1 | £63k | 0.0% | 2022-10-14 |
| any of the projects listed on the portal | Other | 1 | £62k | 0.0% | 2016-09-19 |
| British Business Bank | Other | 1 | £60k | 0.0% | 2022-03-11 |
| UK Shared Business Services Ltd | Other | 1 | £58k | 0.0% | 2015-12-07 |
| London Fire CommissionNew | Other | 1 | £55k | 0.0% | 2024-08-20 |
| East Hampshire District Council | Other | 3 | £53k | 0.0% | 2023-08-28 |
| London Borough of Hackney | Other | 2 | £51k | 0.0% | 2024-11-28 |
| Cambridgeshire District Councils | Other | 2 | £50k | 0.0% | 2019-10-18 |
| Suffolk Coastal District Council and Waveney District CouncilNew | Other | 1 | £48k | 0.0% | 2025-02-09 |
| Havant Borough Council | Other | 1 | £46k | 0.0% | 2017-05-04 |
| Brighton and Hove City Council | Other | 1 | £45k | 0.0% | 2022-06-23 |
| Tyne and Wear Passenger Transport Executive T/A NexusNew | Other | 1 | £40k | 0.0% | 2025-01-28 |
| Transport for London | Other | 1 | £40k | 0.0% | 2016-02-01 |
| Ipswich Borough Council | Other | 1 | £38k | 0.0% | 2024-05-23 |
| Staffordshire County Council | Other | 1 | £38k | 0.0% | 2022-05-03 |
| Chorley Council | Other | 1 | £32k | 0.0% | 2017-09-12 |
| Medway Council | Other | 1 | £30k | 0.0% | 2020-02-06 |
| Greater Manchester Combined Authority - GMPNew | Other | 1 | £27k | 0.0% | 2025-02-11 |
| Cambridgeshire and Peterborough Combined AuthorityNew | Other | 1 | £25k | 0.0% | 2024-05-31 |
| Sheffield City Council | Other | 1 | £20k | 0.0% | 2019-07-17 |
| UK Research & Innovation | Other | 4 | £18k | 0.0% | 2018-09-30 |
| Erewash Borough Council | Other | 1 | £18k | 0.0% | 2017-09-15 |
| Milton Keynes Council | Other | 1 | £17k | 0.0% | 2021-05-28 |
| Worthing Borough Council | Other | 1 | £17k | 0.0% | 2023-01-09 |
| Blackpool Council | Other | 1 | £15k | 0.0% | 2022-08-23 |
| Suffolk Sourcing | Other | 1 | £14k | 0.0% | 2019-12-19 |
| South Cambridgeshire District Council | Other | 2 | £13k | 0.0% | 2026-02-13 |
| Public Health England | Other | 1 | £2k | 0.0% | 2020-03-05 |
| Tunbridge Wells Borough CouncilNew | Other | 2 | £0k | 0.0% | 2026-02-05 |
| Hertfordshire County Council - Environment | Other | 1 | £0k | 0.0% | 2023-08-17 |
| Office for National Statistics | Other | 1 | £0k | 0.0% | 2019-01-29 |
| Sandwell Metropolitan Borough Council | Other | 1 | £0k | 0.0% | 2018-09-25 |
| capitalEsourcing | Other | 1 | £0k | 0.0% | 2017-10-06 |
| London Borough of Camden | Other | 1 | £0k | 0.0% | |
| Tameside Council | Other | 1 | £0k | 0.0% | |
| DESNZ & DSIT Group Commercial | Other | 4 | £0k | 0.0% | |
| ENVIRONMENT AGENCY (Defra Network eTendering Portal) | Other | 3 | £0k | 0.0% | |
| Scotland Excel | Other | 3 | £0k | 0.0% | |
| Northern Ireland Fire and Rescure Service | Other | 1 | £0k | 0.0% | |
| Surrey and Borders Partnership NHS Foundation Trust on behalf of NHS Commercial Solutions | Other | 1 | £0k | 0.0% | |
| Scottish Government | Other | 4 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| Zero Waste Scotland Ltd | Other | 3 | £0k | 0.0% | |
| Welsh Government | Other | 3 | £0k | 0.0% | |
| Utility Regulator Northern Ireland (UREGNI) | Other | 1 | £0k | 0.0% | |
| Magnox Ltd | Other | 1 | £0k | 0.0% | |
| Department of Agriculture, Environment and Rural Affairs | Other | 1 | £0k | 0.0% | |
| SEVERN TRENT WATER LIMITED | Other | 1 | £0k | 0.0% | |
| Norfolk County Council | Other | 1 | £0k | 0.0% | |
| Maritime and Coastguard Agency | Other | 2 | £0k | 0.0% | |
| Fife Council | Other | 2 | £0k | 0.0% | |
| London Borough Of Islington | Other | 1 | £0k | 0.0% | |
| Northern Ireland Electricity Networks Limited | Other | 1 | £0k | 0.0% | |
| UNITED UTILITIES WATER LIMITED | Other | 2 | £0k | 0.0% | |
| Energy Saving Trust Ltd | Other | 1 | £0k | 0.0% | |
| London Borough of Hammersmith and Fuham | Other | 1 | £0k | 0.0% | |
| UK Research and Innovation | Other | 1 | £0k | 0.0% | |
| Hertfordshire County Council | Other | 3 | £0k | 0.0% | |
| Perth & Kinross Council | Other | 2 | £0k | 0.0% | |
| Borough Council of Kings Lynn and West Norfolk | Other | 1 | £0k | 0.0% | |
| Maritime & Coastguard Agency | Other | 1 | £0k | 0.0% | |
| London Borough of Ealing | Other | 1 | £0k | 0.0% | |