| London Borough of Waltham Forest | Other | 7 | £100m | 39.6% | 2026-02-24 |
| Commercial Services Kent LimitedNew | Other | 1 | £90m | 35.6% | 2026-03-30 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 168 | £23m | 9.2% | 2024-12-12 |
| Department of Health and Social Care (DHSC) | Other | 87 | £6m | 2.5% | 2026-03-23 |
| Homes England (the name adopted by the Homes and Communities Agency) | Other | 16 | £4m | 1.5% | 2022-10-31 |
| UK Health Security Agency | Other | 12 | £4m | 1.5% | 2023-12-07 |
| DEFRA | Other | 63 | £3m | 1.4% | 2022-09-20 |
| National Audit Office | Other | 3 | £3m | 1.2% | 2023-11-27 |
| Nottingham City Council | Other | 10 | £2m | 0.7% | 2023-04-13 |
| Foreign Commonwealth and Development Office | Other | 18 | £2m | 0.7% | 2025-05-21 |
| Department of Health and Social Care (T&T) | Other | 6 | £2m | 0.7% | 2021-08-25 |
| Department of Health & Social Care | Other | 21 | £1m | 0.6% | 2025-01-29 |
| Department of Health and Social Care (London) | Other | 17 | £1m | 0.5% | 2021-10-27 |
| Department for Work & Pensions | Other | 3 | £1m | 0.4% | 2024-03-27 |
| NHS England | Other | 2 | £945k | 0.4% | 2021-09-29 |
| Department for Culture, Media and Sport | Other | 12 | £667k | 0.3% | 2022-03-22 |
| The Insolvency Service | Other | 7 | £578k | 0.2% | 2025-05-01 |
| Crown Commercial Service | Other | 7 | £531k | 0.2% | 2020-07-20 |
| Middlesbrough Council | Other | 4 | £520k | 0.2% | 2024-10-04 |
| Department for International Trade | Other | 3 | £496k | 0.2% | 2022-12-01 |
| The National ArchivesNew | Other | 4 | £429k | 0.2% | 2026-01-19 |
| Medicines and Healthcare Products Regulatory Agency | Other | 2 | £415k | 0.2% | 2023-09-18 |
| Folkestone and Hythe District Council | Other | 2 | £375k | 0.1% | 2023-12-01 |
| HM Treasury | Other | 3 | £356k | 0.1% | 2026-03-27 |
| Sport England | Other | 4 | £323k | 0.1% | 2023-11-21 |
| Department for Education | Other | 5 | £317k | 0.1% | 2021-10-01 |
| Department for Business, Energy & Industrial Strategy | Other | 4 | £317k | 0.1% | 2023-05-02 |
| Department of Health and Social Care (T&T) | Other | 2 | £301k | 0.1% | 2021-09-14 |
| Business Energy and Industrial Strategy | Other | 3 | £257k | 0.1% | 2023-11-10 |
| Intellectual Property Office | Other | 2 | £256k | 0.1% | 2022-03-28 |
| Transport for London | Other | 5 | £249k | 0.1% | 2019-05-17 |
| Social Mobility Commission | Other | 7 | £237k | 0.1% | 2024-10-21 |
| Cabinet Office | Other | 2 | £234k | 0.1% | 2024-09-17 |
| Information Commissioner's Office | Other | 2 | £202k | 0.1% | 2025-12-03 |
| Parliamentary and Health Service Ombudsman | Other | 1 | £200k | 0.1% | 2021-10-01 |
| Department for Energy Security & Net Zero | Other | 2 | £152k | 0.1% | 2025-08-15 |
| RESTORATION AND RENEWAL DELIVERY AUTHORITY LTD | Other | 1 | £150k | 0.1% | 2021-03-26 |
| STUDENT LOANS COMPANY LIMITED | Other | 2 | £134k | 0.1% | 2022-03-15 |
| ATAMIS LTD | Other | 1 | £121k | 0.0% | 2021-01-18 |
| Kent Fire & Rescue ServiceNew | Other | 2 | £118k | 0.0% | 2024-10-17 |
| Public Health England | Other | 1 | £102k | 0.0% | 2020-04-17 |
| United Kingdom Atomic Energy AuthorityNew | Other | 1 | £100k | 0.0% | 2024-09-18 |
| London Ambulance Service NHS Trust | Other | 2 | £99k | 0.0% | 2023-06-09 |
| Surrey County Council | Other | 1 | £92k | 0.0% | 2019-02-11 |
| City of London Corporation | Other | 3 | £87k | 0.0% | 2023-01-31 |
| East Sussex County Council | Other | 1 | £75k | 0.0% | 2019-09-03 |
| NHS Arden and Greater East Midlands Commissioning Support Unit | Other | 1 | £63k | 0.0% | 2023-03-09 |
| capitalEsourcing | Other | 1 | £59k | 0.0% | 2020-01-10 |
| Department of Health and Social Care (Yorkshire) | Other | 1 | £51k | 0.0% | 2021-09-28 |
| Home Office | Other | 2 | £48k | 0.0% | 2023-07-26 |
| National Citizen Service | Other | 1 | £40k | 0.0% | 2019-07-01 |
| Ministry of Justice | Other | 1 | £40k | 0.0% | 2014-03-31 |
| Ofgem | Other | 1 | £31k | 0.0% | 2024-01-05 |
| PROACTIS TENDERS LIMITED | Other | 1 | £31k | 0.0% | 2022-12-22 |
| Board of Trustees of the Royal Botanic Gardens Kew | Other | 1 | £26k | 0.0% | 2024-03-13 |
| Equality and Human Rights CommissionNew | Other | 1 | £24k | 0.0% | 2025-01-31 |
| Rotherham MBC | Other | 1 | £20k | 0.0% | 2018-05-24 |
| Government Legal Department | Other | 1 | £19k | 0.0% | 2023-07-31 |
| Security Industry Authority | Other | 1 | £14k | 0.0% | 2024-05-08 |
| Office of Rail and RoadNew | Other | 1 | £13k | 0.0% | 2024-12-31 |
| MHRA | Other | 1 | £13k | 0.0% | 2024-01-08 |
| DfTc - Department for Transport | Other | 1 | £11k | 0.0% | 2020-11-17 |
| Norfolk County Council | Other | 1 | £6k | 0.0% | 2021-07-26 |
| Merseyside Police - Procurement Department | Other | 1 | £2k | 0.0% | 2017-03-23 |
| Ministry of Defence | Other | 1 | £0k | 0.0% | 2019-09-30 |
| Bedford Borough Council | Other | 1 | £0k | 0.0% | |
| UK Research & Innovation | Other | 1 | £0k | 0.0% | |
| Waltham invoice address | Other | 2 | £0k | 0.0% | |
| Southern Universities Purchasing Consortium (SUPC) | Other | 3 | £0k | 0.0% | |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITED | Other | 3 | £0k | 0.0% | |
| Bath and North East Somerset Council | Other | 1 | £0k | 0.0% | |
| Oxfordshire County Council | Other | 1 | £0k | 0.0% | |