| Ministry of Defence | Other | 58 | £35m | 18.4% | 2025-10-10 |
| Crown Commercial Service | Other | 8 | £23m | 12.3% | 2024-03-05 |
| National Highways | Other | 6 | £21m | 11.4% | 2023-03-06 |
| Financial Conduct Authority | Other | 1 | £13m | 6.7% | 2019-06-03 |
| National Highways Limited | Other | 3 | £12m | 6.4% | 2025-12-09 |
| BLUELIGHT COMMERCIAL LIMITEDNew | Other | 3 | £12m | 6.4% | 2026-04-28 |
| Home Office | Other | 8 | £11m | 6.0% | 2026-04-27 |
| Department for Education | Other | 3 | £10m | 5.4% | 2025-04-23 |
| DVSA - Driver and Vehicle Standards Agency | Other | 2 | £9m | 4.8% | 2026-03-25 |
| Department for Transport | Other | 4 | £6m | 3.2% | 2026-05-08 |
| Department for Business & TradeNew | Other | 1 | £4m | 2.1% | 2026-01-26 |
| ATAMIS LTD | Other | 3 | £3m | 1.6% | 2021-02-24 |
| NS&I | Other | 2 | £3m | 1.6% | 2024-12-09 |
| Ministry of Justice | Other | 5 | £3m | 1.5% | 2025-04-25 |
| Defence Science and Technology LaboratoryNew | Other | 2 | £3m | 1.5% | 2026-03-31 |
| M O D Corsham | Other | 1 | £2m | 1.3% | 2019-06-24 |
| Department for International Trade | Other | 1 | £2m | 1.1% | 2023-03-02 |
| Army CommercialNew | Other | 1 | £2m | 0.8% | 2024-08-05 |
| Cabinet Office | Other | 5 | £1m | 0.7% | 2026-03-30 |
| capitalEsourcing | Other | 1 | £1m | 0.7% | 2021-05-25 |
| DIGITAL DEFENCE LIMITED | Other | 3 | £1m | 0.6% | 2024-08-01 |
| National Savings & Investments | Other | 2 | £1m | 0.6% | 2021-04-13 |
| DEFRA | Other | 1 | £950k | 0.5% | 2022-05-03 |
| Met Office | Other | 1 | £938k | 0.5% | 2021-08-09 |
| MOD DE&S ISS CORSHAM | Other | 3 | £741k | 0.4% | 2017-08-07 |
| POLICE DIGITAL SERVICE | Other | 2 | £740k | 0.4% | 2025-12-01 |
| Department of Health and Social Care (DHSC) | Other | 2 | £580k | 0.3% | 2017-12-14 |
| Defence Digital (ISG) | Other | 1 | £554k | 0.3% | 2022-04-01 |
| FCDO Services | Other | 3 | £536k | 0.3% | 2019-07-11 |
| Care Quality Commission | Other | 5 | £518k | 0.3% | 2018-01-15 |
| DfTc - Department for Transport | Other | 5 | £518k | 0.3% | 2024-08-19 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 7 | £507k | 0.3% | 2026-02-24 |
| Business Energy and Industrial Strategy | Other | 6 | £475k | 0.3% | 2023-11-07 |
| Government Commercial Agency | Other | 43 | £400k | 0.2% | 2024-02-21 |
| HM Treasury | Other | 1 | £260k | 0.1% | 2018-10-21 |
| Department for Culture, Media and Sport | Other | 2 | £212k | 0.1% | 2024-09-19 |
| Yorkshire and Humber Police Procurement (Y&HPP) | Other | 1 | £168k | 0.1% | 2018-01-22 |
| ICS on behalf of DSIT and DESNZNew | Other | 2 | £137k | 0.1% | 2026-03-13 |
| Government Digital ServiceNew | Other | 1 | £120k | 0.1% | 2026-01-22 |
| United Kingdom Hydrographic Office | Other | 1 | £119k | 0.1% | 2018-06-12 |
| The House of Lords | Other | 1 | £114k | 0.1% | 2020-03-06 |
| Foreign Commonwealth and Development Office | Other | 1 | £95k | 0.1% | 2022-11-11 |
| SERIOUS FRAUD OFFICENew | Other | 1 | £87k | 0.0% | 2024-09-06 |
| The Pensions RegulatorNew | Other | 2 | £60k | 0.0% | 2026-02-23 |
| UK Export FinanceNew | Other | 1 | £58k | 0.0% | 2024-06-04 |
| UK SBSNew | Other | 1 | £55k | 0.0% | 2025-01-03 |
| Department for Science, Innovation & TechnologyNew | Other | 1 | £55k | 0.0% | 2025-12-12 |
| Environment Agency | Other | 1 | £40k | 0.0% | 2023-02-08 |
| Devon County Council | Other | 1 | £40k | 0.0% | 2019-08-27 |
| Cleveland Fire Authority | Other | 1 | £30k | 0.0% | 2022-01-06 |
| London Borough of Hackney | Other | 1 | £30k | 0.0% | 2021-09-07 |
| Star Procurement | Other | 1 | £30k | 0.0% | 2015-04-26 |
| Health and Safety Executive | Other | 1 | £23k | 0.0% | 2018-01-02 |
| Driver and Vehicle Licensing Agency | Other | 1 | £22k | 0.0% | 2023-11-20 |
| Security Industry AuthorityNew | Other | 1 | £21k | 0.0% | 2024-06-03 |
| Office for National StatisticsNew | Other | 1 | £19k | 0.0% | 2025-12-10 |
| DRIVER & VEHICLE LICENSING AGENCYNew | Other | 1 | £16k | 0.0% | 2025-11-03 |
| Maritime & Coastguard Agency | Other | 1 | £16k | 0.0% | 2018-07-17 |
| Competition and Markets Authority | Other | 1 | £0k | 0.0% | 2017-12-21 |
| Llywodraeth Cymru / Welsh Government | Other | 3 | £0k | 0.0% | |
| Skills Development Scotland Co. Limited | Other | 1 | £0k | 0.0% | |
| Armagh Observatory | Other | 3 | £0k | 0.0% | |
| Driver and Vehicle Standards Agency | Other | 1 | £0k | 0.0% | |
| Royal Borough of Kensington and Chelsea | Other | 1 | £0k | 0.0% | |
| Mid and South Essex NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Metropolitan Police Service | Other | 3 | £0k | 0.0% | |
| The Minister for the Cabinet Office acting through Crown Commercial Service | Other | 3 | £0k | 0.0% | |
| The Police, Fire and Crime Commissioner for Northamptonshire | Other | 1 | £0k | 0.0% | |
| SOUTH EASTERN POWER NETWORKS PLC | Other | 1 | £0k | 0.0% | |
| Mayor's Office for Policing And Crime | Other | 1 | £0k | 0.0% | |
| Portsmouth City Council | Other | 1 | £0k | 0.0% | |