| Home Office | Other | 1 | £821m | 17.6% | 2019-01-08 |
| ATAMIS LTD | Other | 2 | £627m | 13.5% | 2019-01-08 |
| Milton Keynes City CouncilNew | Other | 2 | £475m | 10.2% | 2025-06-03 |
| Ministry of Defence | Other | 2 | £470m | 10.1% | 2022-04-01 |
| Moat Homes Limited | Other | 5 | £425m | 9.1% | 2026-03-16 |
| Cornwall Council | Other | 5 | £314m | 6.7% | 2020-12-20 |
| Milton Keynes Council | Other | 3 | £260m | 5.6% | 2020-10-09 |
| Leeds City Council | Other | 16 | £166m | 3.6% | 2026-01-21 |
| PROSPER | Other | 20 | £151m | 3.3% | 2025-06-20 |
| Rotherham MBC | Other | 2 | £137m | 2.9% | 2019-09-17 |
| LIVIN HOUSING LIMITED | Other | 1 | £109m | 2.3% | 2016-04-20 |
| Cross Keys Homes | Other | 7 | £100m | 2.1% | 2025-03-17 |
| Ministry of Justice | Other | 7 | £80m | 1.7% | 2024-05-23 |
| Echelon Consultancy Ltd | Other | 3 | £68m | 1.5% | 2019-04-03 |
| London Borough of Redbridge | Other | 2 | £63m | 1.4% | 2021-01-10 |
| Folkestone and Hythe District CouncilNew | Other | 2 | £60m | 1.3% | 2025-02-27 |
| Catalyst Housing Limited | Other | 1 | £42m | 0.9% | 2018-09-09 |
| SE Shared Services | Other | 2 | £40m | 0.9% | 2019-10-25 |
| Canterbury City Council | Other | 3 | £36m | 0.8% | 2024-04-11 |
| Dover District CouncilNew | Other | 2 | £27m | 0.6% | 2024-10-17 |
| PROCURE PLUS HOLDINGS LIMITED | Other | 5 | £22m | 0.5% | 2019-10-11 |
| Tower Hamlets | Other | 1 | £17m | 0.4% | 2019-03-05 |
| London Borough of Merton | Other | 1 | £15m | 0.3% | 2020-07-13 |
| Fusion21 Members Consortium | Other | 6 | £12m | 0.3% | 2025-04-15 |
| Brighton and Hove City Council | Other | 3 | £11m | 0.2% | 2021-09-22 |
| EFFICIENCY NORTH LIMITED | Other | 1 | £11m | 0.2% | 2017-03-23 |
| Thurrock CouncilNew | Other | 1 | £10m | 0.2% | 2024-11-13 |
| Colchester City Council | Other | 3 | £9m | 0.2% | 2017-11-08 |
| Gentoo Group Limited | Other | 1 | £9m | 0.2% | 2018-04-23 |
| NE Procurement Ltd | Other | 2 | £9m | 0.2% | 2016-12-16 |
| Exeter City Council | Other | 1 | £8m | 0.2% | 2020-07-10 |
| Thirteen Housing Group Limited | Other | 1 | £8m | 0.2% | 2018-12-12 |
| Royal Borough of Greenwich | Other | 1 | £8m | 0.2% | 2020-02-26 |
| Great Places Housing Group | Other | 1 | £7m | 0.1% | 2020-05-29 |
| Octavia Housing (on behalf of The Connected Partnership) | Other | 1 | £7m | 0.1% | 2020-03-03 |
| Warrington Borough Council | Other | 1 | £6m | 0.1% | 2017-02-21 |
| AMICUSHORIZON LIMITED | Other | 1 | £4m | 0.1% | 2017-03-28 |
| Kent County Council T/a LASER | Other | 2 | £3m | 0.1% | 2020-06-15 |
| Eastbourne Borough Council | Other | 1 | £3m | 0.1% | 2018-02-16 |
| City of Bradford Metropolitan District Council | Other | 23 | £1m | 0.0% | 2025-07-10 |
| South East Consortium | Other | 1 | £1m | 0.0% | 2015-11-23 |
| Bradford Metropolitan District Council | Other | 7 | £1m | 0.0% | 2020-03-18 |
| Newcastle City Council | Other | 4 | £1m | 0.0% | 2019-02-07 |
| Barnsley Metropolitan Borough Council | Other | 1 | £879k | 0.0% | 2018-02-05 |
| English Heritage | Other | 1 | £732k | 0.0% | 2017-03-21 |
| Epping Forest District Council | Other | 3 | £549k | 0.0% | 2022-06-30 |
| Gateshead Council | Other | 1 | £500k | 0.0% | 2016-06-30 |
| UK Atomic Energy Authority | Other | 1 | £404k | 0.0% | 2018-05-17 |
| South Western Ambulance Service NHS Foundation Trust | Other | 1 | £400k | 0.0% | 2017-05-19 |
| Northampton Borough Council | Other | 1 | £304k | 0.0% | 2018-06-01 |
| Shepway District Council | Other | 4 | £158k | 0.0% | 2017-09-11 |
| West Yorkshire Fire & Rescue Service | Other | 1 | £82k | 0.0% | 2020-07-10 |
| Aldwyck Housing Group | Other | 1 | £44k | 0.0% | 2017-06-14 |
| Harrogate Borough Council | Other | 2 | £41k | 0.0% | 2018-03-28 |
| WESTWORKS PROCUREMENT LIMITED | Other | 1 | £30k | 0.0% | 2016-11-08 |
| The District Council of Folkestone and HytheNew | Other | 2 | £28k | 0.0% | 2026-01-27 |
| Supply Hertfordshire | Other | 1 | £0k | 0.0% | 2018-09-07 |
| Durham County Council | Other | 3 | £0k | 0.0% | 2018-02-27 |
| Leeds Beckett University | Other | 1 | £0k | 0.0% | 2017-07-24 |
| PROCURE PLUS HOLDINGS LTD | Other | 1 | £0k | 0.0% | 2015-12-14 |
| SEC PROCUREMENT LIMITED T/A SOUTH EAST CONSORTIUM | Other | 1 | £0k | 0.0% | |
| Birmingham City Council | Other | 1 | £0k | 0.0% | |
| Reid Associates | Other | 1 | £0k | 0.0% | |
| NHMF (NPC) LIMITED | Other | 6 | £0k | 0.0% | |
| North Lanarkshire Council | Other | 3 | £0k | 0.0% | |
| Medway Council | Other | 1 | £0k | 0.0% | |
| CROYDON COUNCIL | Other | 1 | £0k | 0.0% | |
| A2Dominion Housing Group Ltd (A2D) | Other | 1 | £0k | 0.0% | |
| Kent Community Health NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| University Hospitals Dorset NHS Foundation Trust | Other | 1 | £0k | 0.0% | |