| London Borough of Bromley | Other | 1 | £128m | 21.7% | 2018-12-20 |
| THE GUINNESS PARTNERSHIP LIMITEDNew | Other | 2 | £90m | 15.3% | 2026-02-10 |
| Telford & Wrekin Council | Other | 4 | £81m | 13.7% | 2019-03-06 |
| Scottish Water | Other | 1 | £68m | 11.5% | 2021-03-31 |
| Metropolitan Police Service | Other | 1 | £62m | 10.6% | 2018-02-06 |
| London Borough of Camden | Other | 6 | £36m | 6.1% | 2025-10-21 |
| Royal Borough of Kingston Upon Thames | Other | 1 | £27m | 4.5% | 2005-11-15 |
| Fusion21 Members Consortium | Other | 2 | £7m | 1.1% | 2022-06-07 |
| Moat Homes Ltd | Other | 1 | £6m | 1.1% | 2018-11-29 |
| Horsham District Council | Other | 2 | £6m | 1.0% | 2021-10-05 |
| SE Shared Services | Other | 2 | £6m | 1.0% | 2020-07-14 |
| Crawley Borough Council | Other | 3 | £5m | 0.9% | 2021-12-15 |
| Buckinghamshire Council | Other | 2 | £5m | 0.8% | 2021-12-10 |
| Bournemouth Christchurch and Poole Council | Other | 2 | £5m | 0.8% | 2021-12-01 |
| Peabody Trust | Other | 1 | £5m | 0.8% | 2018-07-01 |
| Espo | Other | 8 | £5m | 0.8% | 2025-03-17 |
| Central and Cecil Housing Trust | Other | 1 | £4m | 0.7% | 2020-10-30 |
| Magenta LivingNew | Other | 4 | £4m | 0.6% | 2024-10-09 |
| Moat Homes Limited | Other | 2 | £3m | 0.6% | 2023-12-13 |
| Knowsley Council | Other | 3 | £3m | 0.5% | 2020-11-11 |
| RAND ASSOCIATES CONSULTANCY SERVICES LTD | Other | 1 | £3m | 0.4% | 2018-12-14 |
| IN-TEND LIMITEDNew | Other | 1 | £2m | 0.4% | 2025-02-05 |
| WMCOE - Midland Heart | Other | 1 | £2m | 0.4% | 2017-10-11 |
| Coventry City Council | Other | 1 | £2m | 0.3% | 2021-09-23 |
| Echelon Consultancy Ltd | Other | 1 | £2m | 0.3% | 2019-02-28 |
| Birmingham City Council | Other | 1 | £1m | 0.2% | 2019-11-05 |
| Bristol City CouncilNew | Other | 1 | £1m | 0.2% | 2026-04-17 |
| Northern Ireland Housing ExecutiveNew | Other | 3 | £1m | 0.2% | 2026-01-27 |
| Soha Housing Ltd | Other | 1 | £1m | 0.2% | 2019-12-24 |
| Devon County Council | Other | 9 | £1m | 0.2% | 2025-04-04 |
| Borough of Telford & WrekinNew | Other | 12 | £1m | 0.2% | 2025-09-02 |
| Stoke-on-Trent City Council | Other | 3 | £1m | 0.2% | 2021-09-21 |
| University of Portsmouth | Other | 1 | £972k | 0.2% | 2019-11-29 |
| PROCURE PLUS HOLDINGS LIMITED | Other | 1 | £920k | 0.2% | 2019-04-08 |
| Leicestershire County Council | Other | 1 | £850k | 0.1% | 2018-02-20 |
| Seaford Town CouncilNew | Other | 4 | £760k | 0.1% | 2025-12-19 |
| Hampshire County Council | Other | 3 | £707k | 0.1% | 2020-12-03 |
| Sefton Council | Other | 1 | £700k | 0.1% | 2019-04-08 |
| Gloucestershire Health and Care NHS Foundation Trust | Other | 1 | £668k | 0.1% | 2021-05-01 |
| Teignbridge District CouncilNew | Other | 1 | £609k | 0.1% | 2024-09-03 |
| GREATER MANCHESTER EDUCATION TRUST | Other | 1 | £575k | 0.1% | 2023-01-11 |
| STOCKPORT HOMES LIMITEDNew | Other | 2 | £563k | 0.1% | 2026-02-10 |
| Wensum TrustNew | Other | 1 | £512k | 0.1% | 2026-01-15 |
| Arbour Housing LimitedNew | Other | 2 | £510k | 0.1% | 2026-03-10 |
| Charnwood Borough Council | Other | 1 | £450k | 0.1% | 2019-02-14 |
| United Kingdom Atomic Energy Authority | Other | 2 | £425k | 0.1% | 2021-09-01 |
| Coventry - Solihull - Warwickshire | Other | 4 | £419k | 0.1% | 2020-10-06 |
| Weaver Vale Housing Trust e-Tendering | Other | 1 | £392k | 0.1% | 2020-05-04 |
| London Borough of Redbridge | Other | 2 | £360k | 0.1% | 2022-01-10 |
| Norse Eastern Ltd | Other | 2 | £355k | 0.1% | 2024-02-20 |
| Stafford & Rural Homes | Other | 2 | £350k | 0.1% | 2019-10-11 |
| APEX HOUSING ASSOCIATION | Other | 2 | £350k | 0.1% | 2023-03-07 |
| ACCENT HOUSING LIMITED | Other | 1 | £330k | 0.1% | 2020-04-26 |
| Wychavon District Council | Other | 2 | £263k | 0.0% | 2023-03-28 |
| Mosscare St Vincent's Housing Group LimitedNew | Other | 2 | £250k | 0.0% | 2026-04-28 |
| Solent University | Other | 1 | £250k | 0.0% | 2019-07-31 |
| Selwood Housing | Other | 2 | £230k | 0.0% | 2023-01-10 |
| London Borough of Lambeth | Other | 1 | £210k | 0.0% | 2019-09-11 |
| Blackburn With Darwen Borough Council | Other | 3 | £200k | 0.0% | 2024-03-25 |
| South Suffolk Learning Trust | Other | 1 | £190k | 0.0% | 2020-08-06 |
| Merseytravel | Other | 1 | £178k | 0.0% | 2021-07-27 |
| Derbyshire County Council | Other | 1 | £175k | 0.0% | 2021-11-22 |
| Knowsley Housing Trust | Other | 1 | £160k | 0.0% | 2020-12-08 |
| Westward Housing Group | Other | 3 | £148k | 0.0% | 2023-02-24 |
| The Queen Elizabeth Hospital King's Lynn NHS Foundation Trust | Other | 3 | £145k | 0.0% | 2021-12-31 |
| UNIVERSITY OF WOLVERHAMPTON ENTERPRISE LIMITED | Other | 1 | £130k | 0.0% | 2019-09-25 |
| Swindon Borough Council | Other | 1 | £128k | 0.0% | 2019-01-07 |
| Bolton Metropolitan Borough Council | Other | 1 | £113k | 0.0% | 2022-02-18 |
| London Borough of Hackney | Other | 1 | £111k | 0.0% | 2018-08-31 |
| UNIVERSITY OF GLOUCESTERSHIRE | Other | 1 | £103k | 0.0% | 2019-08-15 |
| English Heritage-Estates | Other | 1 | £103k | 0.0% | 2019-03-08 |
| Worcestershire County CouncilNew | Other | 1 | £102k | 0.0% | 2025-02-13 |
| Basingstoke and Deane Borough Council | Other | 3 | £101k | 0.0% | 2022-03-01 |
| Victoria and Albert Museum | Other | 1 | £90k | 0.0% | 2017-03-15 |
| Procurement for Housing | Other | 4 | £70k | 0.0% | 2021-03-02 |
| Wyre Council | Other | 1 | £69k | 0.0% | 2024-01-22 |
| Forestry Commission, acting through Forestry England (hereinafter referred to as Forestry England) | Other | 1 | £60k | 0.0% | 2021-03-26 |
| capitalEsourcing | Other | 1 | £53k | 0.0% | 2023-07-31 |
| Dorset HealthCare University NHS Foundation Trust | Other | 1 | £48k | 0.0% | 2020-01-16 |
| Staffordshire County Council | Other | 1 | £41k | 0.0% | 2018-03-05 |
| Homes England (the name adopted by the Homes and Communities Agency) | Other | 1 | £35k | 0.0% | 2020-01-20 |
| Salisbury NHS FT | Other | 1 | £30k | 0.0% | 2023-12-01 |
| Ryde Town Council | Other | 1 | £26k | 0.0% | 2018-03-05 |
| Police and Crime Commissioner for North Wales Police & North Wales PoliceNew | Other | 1 | £25k | 0.0% | 2025-05-01 |
| London Borough of Hammersmith & Fulham | Other | 1 | £25k | 0.0% | 2018-09-10 |
| Worcester City Council | Other | 1 | £24k | 0.0% | 2023-01-03 |
| Office for Students | Other | 1 | £23k | 0.0% | 2023-12-08 |
| Westbury Town Council | Other | 1 | £20k | 0.0% | 2022-12-19 |
| Corsham Town Council | Other | 1 | £19k | 0.0% | 2017-03-07 |
| Taunton and Somerset NHS Foundation Trust | Other | 1 | £18k | 0.0% | 2019-07-16 |
| LGSS Burwell Village College Primary School | Other | 1 | £15k | 0.0% | 2019-03-22 |
| Crediton Town CouncilNew | Other | 1 | £15k | 0.0% | 2026-02-17 |
| Trowbridge Town CouncilNew | Other | 1 | £12k | 0.0% | 2026-03-09 |
| CRESCENT PURCHASING LIMITED | Other | 1 | £1k | 0.0% | 2020-10-16 |
| Dudley Metropolitan Borough Council | Other | 2 | £0k | 0.0% | 2022-11-17 |
| Derby College | Other | 1 | £0k | 0.0% | 2022-04-05 |
| Havebury Housing Partnership | Other | 1 | £0k | 0.0% | 2018-12-10 |
| Further Education Colleges | Other | 1 | £0k | 0.0% | 2018-03-09 |
| Wiltshire Council | Other | 1 | £0k | 0.0% | |
| Renfrewshire Council | Other | 2 | £0k | 0.0% | |
| Caledonia Housing Association | Other | 1 | £0k | 0.0% | |
| The Guinness Partnership Ltd | Other | 10 | £0k | 0.0% | |
| Rother District Council | Other | 1 | £0k | 0.0% | |
| University of Strathclyde | Other | 1 | £0k | 0.0% | |
| Dalmuir Park Housing Association | Other | 3 | £0k | 0.0% | |
| Community Health Partnerships Limited | Other | 5 | £0k | 0.0% | |
| Cassiltoun Housing Association Ltd. | Other | 1 | £0k | 0.0% | |
| Loreburn Housing Association | Other | 2 | £0k | 0.0% | |
| Scottish Borders Housing Association Ltd | Other | 1 | £0k | 0.0% | |
| Kent County Council (T/a as KCS Procurement Services) | Other | 1 | £0k | 0.0% | |
| Nottingham Community Housing Association | Other | 1 | £0k | 0.0% | |
| Tollcross Housing Association Ltd. | Other | 1 | £0k | 0.0% | |
| Muircroft Housing Association | Other | 1 | £0k | 0.0% | |
| The City of Edinburgh Council | Other | 1 | £0k | 0.0% | |
| Local Authority | Other | 13 | £0k | 0.0% | |
| Eildon Housing Association | Other | 1 | £0k | 0.0% | |
| SCOTIA GAS NETWORKS LIMITED | Other | 2 | £0k | 0.0% | |
| North Western Universities Purchasing Consortium Ltd | Other | 13 | £0k | 0.0% | |
| Falkirk Council | Other | 1 | £0k | 0.0% | |
| BROMFORD HOUSING GROUP LIMITED | Other | 1 | £0k | 0.0% | |
| Livv Housing Group | Other | 1 | £0k | 0.0% | |
| NORTHUMBRIAN WATER LIMITED | Other | 1 | £0k | 0.0% | |
| Norse Commercial Services Limited | Other | 1 | £0k | 0.0% | |