| Kent County Council (t/a KCS) | Other | 3 | £36m | 36.1% | 2022-12-13 |
| Central Housing Investment Consortium Limited ("CHIC") | Other | 1 | £16m | 16.0% | 2020-12-04 |
| North of England Commercial Procurement CollaborativeNew | Other | 1 | £11m | 10.5% | 2024-08-02 |
| Espo | Other | 10 | £9m | 8.7% | 2023-07-31 |
| Communities & Housing Investment Consortium Ltd (CHIC)New | Other | 3 | £5m | 4.9% | 2025-01-27 |
| Northern Housing Consortium Ltd | Other | 2 | £4m | 4.0% | 2024-01-04 |
| Procurement for HousingNew | Other | 2 | £3m | 3.4% | 2024-12-10 |
| N H S Shared Business ServicesNew | Other | 1 | £2m | 2.0% | 2025-01-06 |
| Leeds Teaching Hospitals NHS Trust | Other | 3 | £2m | 1.9% | 2026-03-02 |
| National Highways | Other | 2 | £2m | 1.8% | 2024-08-15 |
| Bradford Teaching Hospitals NHS Foundation Trust | Other | 3 | £1m | 1.3% | 2025-05-12 |
| Nuclear Restoration Services LimitedNew | Other | 3 | £1m | 1.0% | 2026-05-06 |
| Leeds City Council | Other | 7 | £854k | 0.8% | 2023-10-24 |
| NHS Property Services | Other | 1 | £804k | 0.8% | 2024-03-25 |
| University Hospitals Sussex NHS FoundatiNew | Other | 1 | £734k | 0.7% | 2025-03-19 |
| Swindon Borough Council | Other | 2 | £663k | 0.7% | 2024-04-10 |
| BABCOCK INTERNATIONAL GROUP PLC | Other | 1 | £657k | 0.7% | 2017-10-04 |
| NHS Property Services Limited | Other | 1 | £581k | 0.6% | 2020-02-25 |
| FCA | Other | 1 | £530k | 0.5% | 2024-05-15 |
| Ministry of Defence | Other | 2 | £515k | 0.5% | 2022-12-06 |
| YPO | Other | 1 | £429k | 0.4% | 2019-12-13 |
| Tyne and Wear Passenger Transport Executive T/A Nexus | Other | 1 | £360k | 0.4% | 2022-03-18 |
| Devon County Council | Other | 1 | £264k | 0.3% | 2019-09-23 |
| UNIVERSITY OF KEELE | Other | 1 | £180k | 0.2% | 2023-02-21 |
| Thrive Homes Limited | Other | 1 | £165k | 0.2% | 2020-08-06 |
| United Lincolnshire Hospitals NHS TrustNew | Other | 1 | £155k | 0.2% | 2024-07-11 |
| Nursing And Midwifery Council | Other | 1 | £150k | 0.1% | 2022-10-24 |
| East and North Hertfordshire NHS Trust | Other | 1 | £136k | 0.1% | 2022-07-05 |
| Herefordshire Council | Other | 1 | £114k | 0.1% | 2023-11-07 |
| North Northamptonshire CouncilNew | Other | 2 | £110k | 0.1% | 2025-08-04 |
| UK Research & Innovation | Other | 1 | £109k | 0.1% | 2023-11-08 |
| Cheshire and Wirral Partnership NHS fOUNDATION tRUST | Other | 1 | £83k | 0.1% | 2022-03-31 |
| Oil and Pipelines Agency | Other | 1 | £71k | 0.1% | 2018-06-15 |
| Lincolnshire Partnership NHS Foundation TrustNew | Other | 1 | £60k | 0.1% | 2025-06-24 |
| London Borough of Hounslow | Other | 1 | £59k | 0.1% | 2017-08-21 |
| West Northamptonshire Council | Other | 1 | £50k | 0.0% | 2022-03-16 |
| Hertfordshire NHS Procurement | Other | 1 | £48k | 0.0% | 2018-02-08 |
| UK Research and Innovation, Science and Technology Facilities Council | Other | 1 | £47k | 0.0% | 2024-05-07 |
| Kirklees Council | Other | 1 | £44k | 0.0% | 2020-08-31 |
| Rutland County Council | Other | 1 | £43k | 0.0% | 2023-09-12 |
| Shepway District Council | Other | 1 | £43k | 0.0% | 2016-04-12 |
| SOUTH TEES SITE COMPANY LIMITED | Other | 1 | £42k | 0.0% | 2021-06-21 |
| DERBYSHIRE COMMUNITY HEALTH SERVICES NHS FOUNDATION TRUSTNew | Other | 1 | £40k | 0.0% | 2025-06-25 |
| United Lincolnshire Teaching Hospitals NHS TrustNew | Other | 1 | £40k | 0.0% | 2025-06-25 |
| CALDERDALE AND HUDDERSFIELD SOLUTIONS LTD | Other | 1 | £40k | 0.0% | 2022-08-17 |
| Stevenage Borough Council | Other | 1 | £39k | 0.0% | 2022-01-11 |
| Ministry of JusticeNew | Other | 1 | £36k | 0.0% | 2024-12-03 |
| Nottinghamshire Fire and Rescue ServiceNew | Other | 1 | £33k | 0.0% | 2025-11-03 |
| TEC PartnershipNew | Other | 1 | £31k | 0.0% | 2025-10-24 |
| Chelmsford City Council | Other | 1 | £24k | 0.0% | 2016-05-09 |
| Milton Keynes CouncilNew | Other | 1 | £23k | 0.0% | 2025-12-11 |
| Redditch Borough & Bromsgrove District Councils | Other | 1 | £18k | 0.0% | 2021-03-21 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 1 | £13k | 0.0% | 2024-05-15 |
| Charnwood Borough Council | Other | 1 | £13k | 0.0% | 2016-09-23 |
| Department of Health and Social Care (DHSC) | Other | 3 | £12k | 0.0% | 2023-04-03 |
| Borough Council of Kings Lynn and West Norfolk | Other | 1 | £10k | 0.0% | 2021-02-02 |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITEDNew | Other | 2 | £0k | 0.0% | 2024-11-24 |
| NOE CPC | Other | 1 | £0k | 0.0% | 2020-06-05 |
| Cumbria Commissioner Fire and Rescue Authority | Other | 1 | £0k | 0.0% | |
| ADVANTAGE SOUTHWEST LLP | Other | 2 | £0k | 0.0% | |
| Scotland Excel | Other | 11 | £0k | 0.0% | |
| Powys County Council | Other | 4 | £0k | 0.0% | |
| South Ayrshire Council | Other | 2 | £0k | 0.0% | |
| Durham County Council | Other | 1 | £0k | 0.0% | |
| NHS Greater Glasgow and Clyde | Other | 1 | £0k | 0.0% | |
| Bournemouth Christchurch and Poole Council | Other | 2 | £0k | 0.0% | |
| Forestry and Land Scotland | Other | 1 | £0k | 0.0% | |
| Dundee City Council | Other | 2 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 2 | £0k | 0.0% | |
| CAMBRIDGE UNIVERSITY HOSPITALS NHS FOUNDATION TRUST | Other | 1 | £0k | 0.0% | |
| KBS MARITIME LIMITED | Other | 1 | £0k | 0.0% | |
| Tyne and Wear Fire and Rescue Authority | Other | 1 | £0k | 0.0% | |
| Cannock Chase District Council | Other | 1 | £0k | 0.0% | |
| Northumberland County Council (Framework Contract Participant) | Other | 1 | £0k | 0.0% | |
| Northumberland County Council | Other | 1 | £0k | 0.0% | |
| Dumfries and Galloway Council | Other | 1 | £0k | 0.0% | |
| Leeds City Council - PACS | Other | 1 | £0k | 0.0% | |
| OPEN UNIVERSITY(THE) | Other | 1 | £0k | 0.0% | |
| St Helens Council | Other | 1 | £0k | 0.0% | |