| Intellectual Property OfficeNew | Other | 2 | £506m | 59.5% | 2024-11-30 |
| Global Commercial Services Group LtdNew | Other | 2 | £250m | 29.4% | 2025-10-16 |
| YPONew | Other | 3 | £19m | 2.2% | 2025-03-05 |
| Department for Environment Food & Rural AffairsNew | Other | 1 | £15m | 1.7% | 2025-07-09 |
| Restoration & Renewal Delivery Authority LtdNew | Other | 1 | £8m | 0.9% | 2024-09-16 |
| HISTORIC ENGLAND LIMITED | Other | 5 | £7m | 0.9% | 2025-08-01 |
| Nottingham City CouncilNew | Other | 1 | £7m | 0.8% | 2025-05-27 |
| Leicestershire County CouncilNew | Other | 2 | £6m | 0.7% | 2025-05-27 |
| Milton Keynes CouncilNew | Other | 1 | £4m | 0.5% | 2025-04-29 |
| Bath and North East Somerset CouncilNew | Other | 1 | £4m | 0.4% | 2025-04-30 |
| City of Doncaster CouncilNew | Other | 2 | £3m | 0.4% | 2026-02-23 |
| In-Tend e-TenderingNew | Other | 2 | £3m | 0.3% | 2025-01-23 |
| Department for Work & PensionsNew | Other | 1 | £2m | 0.3% | 2024-10-23 |
| Ministry of Defence | Other | 5 | £2m | 0.3% | 2024-09-17 |
| Information Commissioner's OfficeNew | Other | 1 | £2m | 0.3% | 2025-11-17 |
| ICS on behalf of DSIT and DESNZNew | Other | 3 | £2m | 0.2% | 2025-12-22 |
| NHS MIDLANDS AND LANCASHIRE COMMISSIONING SUPPORT UNITNew | Other | 6 | £1m | 0.2% | 2026-03-11 |
| Home Office | Other | 4 | £1m | 0.1% | 2024-11-06 |
| H M REVENUE & CUSTOMSNew | Other | 1 | £980k | 0.1% | 2024-10-26 |
| Hampshire County CouncilNew | Other | 2 | £969k | 0.1% | 2026-01-08 |
| Mid Devon District CouncilNew | Other | 1 | £766k | 0.1% | 2025-06-14 |
| NHS SOUTH, CENTRAL AND WEST COMMISSIONING SUPPORT UNITNew | Other | 10 | £754k | 0.1% | 2026-03-10 |
| North Yorkshire County Council | Other | 1 | £596k | 0.1% | 2019-07-30 |
| MCA - Maritime and Coastguard AgencyNew | Other | 1 | £492k | 0.1% | 2024-11-04 |
| Medicines and Healthcare Products Regulatory AgencyNew | Other | 2 | £435k | 0.1% | 2026-02-02 |
| Companies House | Other | 6 | £426k | 0.0% | 2025-12-22 |
| Business Energy and Industrial Strategy | Other | 1 | £423k | 0.0% | 2023-12-19 |
| Lichfield District CouncilNew | Other | 1 | £419k | 0.0% | 2025-04-25 |
| Driver and Vehicle Licensing AgencyNew | Other | 4 | £404k | 0.0% | 2026-03-11 |
| Birmingham City CouncilNew | Other | 1 | £384k | 0.0% | 2026-03-13 |
| Braintree District Council | Other | 1 | £339k | 0.0% | 2024-05-14 |
| CafcassNew | Other | 1 | £336k | 0.0% | 2024-10-29 |
| Crown Commercial Service | Other | 2 | £278k | 0.0% | 2024-10-22 |
| Warwickshire County CouncilNew | Other | 1 | £260k | 0.0% | 2025-01-10 |
| UK Debt Management Office | Other | 4 | £213k | 0.0% | 2023-01-16 |
| CPS | Other | 3 | £142k | 0.0% | 2025-02-19 |
| ACCENT HOUSING LIMITEDNew | Other | 2 | £137k | 0.0% | 2025-07-01 |
| UK Atomic Energy AuthorityNew | Other | 2 | £120k | 0.0% | 2026-03-09 |
| Cambridgeshire County Council | Other | 2 | £111k | 0.0% | 2025-10-27 |
| Leicestershire Partnership NHS TrustNew | Other | 1 | £100k | 0.0% | 2025-10-09 |
| The National ArchivesNew | Other | 4 | £94k | 0.0% | 2026-01-02 |
| NUCLEAR DECOMMISSIONING AUTHORITYNew | Other | 2 | £90k | 0.0% | 2025-01-17 |
| LONDON & QUADRANT HOUSING TRUST LIMITED | Other | 1 | £73k | 0.0% | 2019-06-06 |
| DfTc - Department for TransportNew | Other | 1 | £66k | 0.0% | 2025-11-11 |
| NHS Arden and GEM CSU | Other | 1 | £63k | 0.0% | 2022-11-03 |
| PROACTIS TENDERS LIMITED | Other | 1 | £60k | 0.0% | 2023-12-15 |
| Brighton and Hove City Council | Other | 1 | £58k | 0.0% | 2020-09-24 |
| Blackburn With Darwen Borough Council | Other | 1 | £57k | 0.0% | 2018-09-12 |
| Partners Procurement Service | Other | 1 | £56k | 0.0% | 2017-09-28 |
| National Institute for Health and Care Excellence | Other | 1 | £45k | 0.0% | 2024-04-05 |
| NHS Arden and Greater East Midlands Commissioning Support Unit | Other | 1 | £42k | 0.0% | 2022-08-03 |
| Office for National StatisticsNew | Other | 2 | £38k | 0.0% | 2025-10-28 |
| Sellafield LimitedNew | Other | 2 | £37k | 0.0% | 2025-06-01 |
| Health & Safety ExecutiveNew | Other | 1 | £33k | 0.0% | 2024-08-13 |
| Leeds City College | Other | 1 | £33k | 0.0% | 2024-03-22 |
| Pool Re Services Limited | Other | 1 | £33k | 0.0% | 2023-11-23 |
| Bournemouth Christchurch and Poole Council | Other | 1 | £31k | 0.0% | 2020-03-05 |
| SellafieldNew | Other | 1 | £30k | 0.0% | 2025-03-14 |
| Police & Crime Commissioner For Staffordshire | Other | 1 | £30k | 0.0% | 2020-07-06 |
| Met OfficeNew | Other | 1 | £30k | 0.0% | 2024-12-13 |
| Isle of Wight CouncilNew | Other | 1 | £28k | 0.0% | 2024-08-01 |
| NHS Mid & South Essex Integrated Care BoardNew | Other | 1 | £28k | 0.0% | 2025-03-19 |
| Hull and East Yorkshire Hospitals NHS Trust | Other | 1 | £25k | 0.0% | 2018-02-13 |
| Portsmouth City Council | Other | 3 | £9k | 0.0% | 2022-06-06 |
| Anglia Ruskin University | Other | 1 | £0k | 0.0% | 2017-02-10 |
| Avon Fire Authority | Other | 1 | £0k | 0.0% | |
| Shetland Islands Council | Other | 1 | £0k | 0.0% | |
| East Sussex County Council | Other | 1 | £0k | 0.0% | |
| Kent County Council (t/a KCS Procurement Services) | Other | 1 | £0k | 0.0% | |
| Fife Council | Other | 1 | £0k | 0.0% | |
| Llywodraeth Cymru / Welsh Government - Commercial Delivery | Other | 4 | £0k | 0.0% | |
| NHS Sussex ICB | Other | 1 | £0k | 0.0% | |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITED | Other | 1 | £0k | 0.0% | |
| HealthTrust Europe LLP (HTE) acting on behalf of | Other | 1 | £0k | 0.0% | |
| Royal Berkshire NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| BELIEVE HOUSING LIMITED | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| London Borough of Harrow | Other | 1 | £0k | 0.0% | |