| NHS Shared Business Services Ltd (NHS SBS) | Other | 1 | £18m | 26.3% | 2020-08-10 |
| CPS | Other | 4 | £15m | 22.5% | 2025-04-24 |
| City of Bradford Metropolitan District Council | Other | 2 | £10m | 14.7% | 2022-09-27 |
| THE FINANCIAL REPORTING COUNCIL LIMITED | Other | 3 | £4m | 5.3% | 2025-06-27 |
| South West Police Procurement Service | Other | 1 | £3m | 4.1% | 2023-12-12 |
| Office for National StatisticsNew | Other | 11 | £2m | 2.5% | 2026-03-10 |
| Bradford Metropolitan District Council | Other | 4 | £1m | 2.2% | 2020-08-14 |
| Essex County Council | Other | 1 | £1m | 1.5% | 2017-12-08 |
| THE PENNINE ACUTE HOSPITAL N H S TRUST | Other | 1 | £887k | 1.3% | 2018-03-20 |
| Offshore Renewable Energy CatapultNew | Other | 3 | £833k | 1.2% | 2026-01-20 |
| The National Archives | Other | 11 | £814k | 1.2% | 2021-11-19 |
| Crown Commercial Service | Other | 8 | £803k | 1.2% | 2018-08-31 |
| LONDON & QUADRANT HOUSING TRUST LIMITED | Other | 2 | £671k | 1.0% | 2019-02-07 |
| NHS Arden and Greater East Midlands Commissioning Support Unit | Other | 7 | £613k | 0.9% | 2025-12-12 |
| Colchester City CouncilNew | Other | 1 | £576k | 0.8% | 2025-03-04 |
| Independent Office for Police Conduct | Other | 3 | £571k | 0.8% | 2021-02-26 |
| National Highways | Other | 1 | £528k | 0.8% | 2018-08-13 |
| NHS Arden and GEM CSU | Other | 7 | £473k | 0.7% | 2023-01-03 |
| Hampshire County CouncilNew | Other | 1 | £450k | 0.7% | 2025-07-08 |
| National Audit Office | Other | 10 | £441k | 0.6% | 2026-02-28 |
| ICS on behalf of DSIT and DESNZNew | Other | 4 | £426k | 0.6% | 2024-12-06 |
| Business Energy and Industrial Strategy | Other | 1 | £395k | 0.6% | 2023-07-31 |
| Transport Systems Catapult | Other | 1 | £375k | 0.6% | 2016-03-23 |
| Teignbridge District Council | Other | 2 | £322k | 0.5% | 2022-03-14 |
| Driver and Vehicle Licensing Agency | Other | 3 | £288k | 0.4% | 2024-05-23 |
| Housing 21 | Other | 2 | £286k | 0.4% | 2021-01-13 |
| Home Office | Other | 3 | £278k | 0.4% | 2025-11-24 |
| NHS Shared Business Services | Other | 1 | £277k | 0.4% | 2023-10-16 |
| NHS SOUTH, CENTRAL AND WEST COMMISSIONING SUPPORT UNIT | Other | 6 | £257k | 0.4% | 2026-03-10 |
| Cumberland CouncilNew | Other | 1 | £241k | 0.4% | 2025-10-02 |
| Epping Forest District CouncilNew | Other | 1 | £213k | 0.3% | 2025-03-10 |
| OFCOM | Other | 2 | £211k | 0.3% | 2022-10-21 |
| Department for Education | Other | 4 | £206k | 0.3% | 2026-03-01 |
| DfTc - Department for Transport | Other | 1 | £200k | 0.3% | 2021-12-17 |
| Department for Business, Energy & Industrial Strategy | Other | 1 | £182k | 0.3% | 2023-03-24 |
| Herefordshire and Worcestershire Health and Care NHS Trust | Other | 1 | £164k | 0.2% | 2023-09-11 |
| NHS NORTH OF ENGLAND COMMISSIONING SUPPORT UNITNew | Other | 1 | £162k | 0.2% | 2025-04-27 |
| Castle Point Borough CouncilNew | Other | 1 | £159k | 0.2% | 2024-08-13 |
| Companies HouseNew | Other | 3 | £157k | 0.2% | 2025-05-19 |
| CRESCENT PURCHASING LIMITED | Other | 2 | £134k | 0.2% | 2020-07-10 |
| Lewisham Homes Ltd | Other | 1 | £130k | 0.2% | 2021-11-10 |
| Pension Protection Fund | Other | 2 | £114k | 0.2% | 2025-08-14 |
| DVLA - Driver & Vehicle Licensing AgencyNew | Other | 1 | £105k | 0.2% | 2026-04-21 |
| Thirteen Housing Group Limited | Other | 1 | £102k | 0.2% | 2018-11-08 |
| MCA - Maritime and Coastguard Agency | Other | 5 | £101k | 0.1% | 2024-03-10 |
| Bournemouth Christchurch and Poole CouncilNew | Other | 2 | £98k | 0.1% | 2025-06-11 |
| Cambridgeshire Constabulary | Other | 1 | £92k | 0.1% | 2016-12-22 |
| NHS Digital | Other | 1 | £92k | 0.1% | 2022-01-27 |
| Wakefield and District Housing limited | Other | 1 | £83k | 0.1% | 2023-10-26 |
| NHS Mid & South Essex Integrated Care BoardNew | Other | 2 | £75k | 0.1% | 2026-03-04 |
| The Pensions RegulatorNew | Other | 2 | £65k | 0.1% | 2026-02-04 |
| NHS Hampshire and Isle of Wight Integrated Care BoardNew | Other | 1 | £60k | 0.1% | 2025-12-04 |
| COLLEGE OF POLICING LIMITED | Other | 1 | £55k | 0.1% | 2019-02-18 |
| Department of Health & Social Care | Other | 1 | £54k | 0.1% | 2019-03-20 |
| Worcestershire County Council | Other | 2 | £51k | 0.1% | 2021-06-02 |
| Hereford & Worcester Fire & Rescue Service | Other | 2 | £38k | 0.1% | 2019-01-30 |
| D V L A | Other | 1 | £33k | 0.0% | 2018-06-20 |
| Barnsley Metropolitan Borough CouncilNew | Other | 2 | £31k | 0.0% | 2025-06-04 |
| FCDO Services | Other | 2 | £31k | 0.0% | 2019-02-26 |
| Thirteen Housing Group Ltd | Other | 1 | £26k | 0.0% | 2019-08-06 |
| Halton Housing Trust | Other | 1 | £26k | 0.0% | 2017-04-07 |
| Ministry of Defence | Other | 1 | £22k | 0.0% | 2019-07-16 |
| Department for Transport | Other | 1 | £17k | 0.0% | 2020-01-22 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 1 | £17k | 0.0% | 2022-03-11 |
| Intellectual Property OfficeNew | Other | 1 | £15k | 0.0% | 2026-04-21 |
| NHS Arden & GEM CSU | Other | 1 | £15k | 0.0% | 2021-08-20 |
| Leeds City Council | Other | 1 | £13k | 0.0% | 2019-03-29 |
| NHS Arden & GEM CSU | Other | 1 | £11k | 0.0% | 2021-10-19 |
| National Archives Public Record Office | Other | 2 | £10k | 0.0% | 2017-03-14 |
| HERTS FOR LEARNING LIMITEDNew | Other | 2 | £0k | 0.0% | 2026-03-18 |
| Newcastle University | Other | 1 | £0k | 0.0% | 2018-07-17 |
| Independent Police Complaints Commission | Other | 1 | £0k | 0.0% | 2017-02-22 |
| Cyngor Sir Ceredigion County Council | Other | 1 | £0k | 0.0% | |
| Crown Prosecution Service | Other | 2 | £0k | 0.0% | |
| Southern Universities Purchasing Consortium (SUPC) | Other | 1 | £0k | 0.0% | |
| ENERGY SYSTEMS CATAPULT | Other | 2 | £0k | 0.0% | |
| Tendring District Council | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| Connected Places Catapult | Other | 1 | £0k | 0.0% | |
| Torbay Council | Other | 1 | £0k | 0.0% | |
| NORTHERN GAS NETWORKS LIMITED | Other | 1 | £0k | 0.0% | |