| ISS MoD : Ministry of Defence | Other | 3 | £191m | 32.3% | 2019-09-16 |
| HEALTHTRUST EUROPE | Other | 1 | £129m | 21.7% | 2015-11-27 |
| Strategic Command - Headquarters (was JFC -Northwood) : Ministry of Defence | Other | 7 | £76m | 12.9% | 2020-03-13 |
| NHS Shared Business Services Ltd (NHS SBS) | Other | 2 | £56m | 9.5% | 2020-08-10 |
| Crown Commercial Service | Other | 140 | £53m | 8.9% | 2018-10-18 |
| Joint Forces Command - Headquarters (Northwood) : Ministry of Defence | Other | 14 | £13m | 2.2% | 2019-10-28 |
| Valuation Office Agency | Other | 87 | £9m | 1.5% | 2020-08-12 |
| Ministry of Defence | Other | 36 | £8m | 1.3% | 2020-07-23 |
| YPO | Other | 1 | £6m | 1.1% | 2019-09-20 |
| Intellectual Property Office | Other | 2 | £5m | 0.9% | 2019-11-29 |
| Sellafield Limited : Department for Business Energy & Industrial Strategy | Other | 1 | £4m | 0.7% | 2019-06-12 |
| Department for Work & Pensions | Other | 4 | £4m | 0.6% | 2020-03-10 |
| Defence Digital (ISG) | Other | 3 | £4m | 0.6% | 2020-08-25 |
| NHS Digital | Other | 9 | £3m | 0.5% | 2021-03-08 |
| Met Office | Other | 54 | £3m | 0.5% | 2020-03-26 |
| HM Land Registry | Other | 10 | £3m | 0.4% | 2019-11-28 |
| Avon & Somerset Constabulary | Other | 1 | £3m | 0.4% | 2017-06-29 |
| Navy Command - Headquarters (Portsmouth) : Ministry of Defence | Other | 2 | £2m | 0.4% | 2019-07-18 |
| Home Office | Other | 3 | £2m | 0.3% | 2020-06-16 |
| Student Loans Company | Other | 2 | £2m | 0.3% | 2020-03-31 |
| Department for Transport | Other | 8 | £1m | 0.2% | 2020-08-19 |
| UK SHARED BUSINESS SERVICES LIMITED | Other | 7 | £1m | 0.2% | 2019-12-17 |
| HealthTrust Europe LLP (HTE) acting as agent for the University Hospitals of Coventry and Warwickshire NHS Trust (“UHCW”) | Other | 1 | £1m | 0.2% | 2020-02-03 |
| FCDO Services | Other | 16 | £798k | 0.1% | 2020-01-29 |
| London Borough of Merton | Other | 2 | £754k | 0.1% | 2019-06-25 |
| Bernicia Group | Other | 1 | £745k | 0.1% | 2018-12-21 |
| Bath and North East Somerset Council | Other | 2 | £743k | 0.1% | 2019-06-03 |
| HER MAJESTYS LAND REGISTRY | Other | 6 | £699k | 0.1% | 2018-07-17 |
| Wolverhampton City Council | Other | 1 | £689k | 0.1% | 2019-06-06 |
| Yorkshire & Humber Police Procurement | Other | 1 | £671k | 0.1% | 2019-02-28 |
| Thirteen Housing Group Limited | Other | 3 | £594k | 0.1% | 2020-08-31 |
| Ministry of Defence, C&C, Other | Other | 1 | £530k | 0.1% | 2019-01-01 |
| Medicines and Healthcare Products Regulatory Agency | Other | 1 | £487k | 0.1% | 2017-06-18 |
| British Transport Police | Other | 1 | £465k | 0.1% | 2019-01-23 |
| ENERGY SYSTEMS CATAPULT | Other | 1 | £429k | 0.1% | 2019-08-01 |
| Ofsted | Other | 5 | £422k | 0.1% | 2020-02-24 |
| South Yorkshire Police Headquarters | Other | 2 | £393k | 0.1% | 2018-01-30 |
| Transport Systems Catapult | Other | 1 | £375k | 0.1% | 2016-03-23 |
| Health and Social Care Information Centre | Other | 3 | £367k | 0.1% | 2017-10-25 |
| Army HQ (Andover) : Ministry of Defence | Other | 4 | £365k | 0.1% | 2018-12-06 |
| EMSCU Nottinghamshire Police | Other | 3 | £320k | 0.1% | 2019-06-26 |
| The Queen Elizabeth Hospital King's Lynn NHS Foundation Trust | Other | 3 | £287k | 0.0% | 2020-06-08 |
| DEFRA | Other | 1 | £272k | 0.0% | 2016-03-11 |
| NHS Improvements | Other | 1 | £259k | 0.0% | 2017-02-20 |
| East Midlands Ambulance Service NHS Trust | Other | 1 | £249k | 0.0% | 2019-09-19 |
| Department for Environment Food & Rural Affairs | Other | 1 | £249k | 0.0% | 2016-03-11 |
| Norfolk County Council | Other | 1 | £248k | 0.0% | 2017-02-23 |
| Gateshead Council | Other | 2 | £197k | 0.0% | 2018-08-22 |
| Government Legal Service | Other | 1 | £180k | 0.0% | 2020-06-26 |
| Procurement Lincolnshire | Other | 1 | £178k | 0.0% | 2017-01-03 |
| Financial Conduct Authority | Other | 1 | £162k | 0.0% | 2022-11-07 |
| Warrington Borough Council | Other | 1 | £160k | 0.0% | 2016-11-04 |
| NCG Corporation | Other | 1 | £153k | 0.0% | 2019-06-16 |
| Suffolk Constabulary | Other | 1 | £147k | 0.0% | 2019-06-20 |
| Walsall Healthcare NHS Trust | Other | 4 | £130k | 0.0% | 2023-06-07 |
| Durham County Council | Other | 2 | £126k | 0.0% | 2019-10-22 |
| Middlesbrough Council | Other | 3 | £121k | 0.0% | 2017-04-24 |
| The Water Services Regulation Authority | Other | 1 | £108k | 0.0% | 2018-02-27 |
| DRIVER & VEHICLE LICENSING AGENCY | Other | 4 | £107k | 0.0% | 2018-03-16 |
| National Highways Limited | Other | 1 | £100k | 0.0% | 2018-09-13 |
| BCH Procurement (Representing The Police and Crime Commissioners for Bedfordshire, Cambridgeshire and Hertfordshire ) | Other | 1 | £98k | 0.0% | 2018-01-18 |
| H M GOVERNMENT CABINET OFFICE | Other | 2 | £97k | 0.0% | 2016-08-12 |
| Royal Air Force (RAF) - Headquarters : Ministry of Defence | Other | 1 | £91k | 0.0% | 2018-10-17 |
| The National Archives | Other | 2 | £88k | 0.0% | 2019-08-28 |
| D V L A | Other | 2 | £87k | 0.0% | 2018-04-25 |
| Public Health England | Other | 1 | £86k | 0.0% | 2020-03-19 |
| FUTURE CITIES CATAPULT | Other | 1 | £83k | 0.0% | 2019-03-21 |
| United Kingdom Hydrographic Office | Other | 1 | £81k | 0.0% | 2017-08-08 |
| Defence Equipment and Support | Other | 1 | £80k | 0.0% | 2019-01-29 |
| Isle of Wight Council | Other | 1 | £80k | 0.0% | 2018-02-19 |
| Hertfordshire NHS Procurement | Other | 1 | £79k | 0.0% | 2022-01-17 |
| Leicestershire County Council | Other | 1 | £78k | 0.0% | 2017-03-07 |
| Sunderland City Council | Other | 2 | £78k | 0.0% | 2019-12-13 |
| HOMES & COMMUNITIES AGENCY | Other | 3 | £77k | 0.0% | 2017-02-16 |
| Army Command - HQ (Andover) : Ministry of Defence | Other | 1 | £74k | 0.0% | 2018-10-15 |
| Tyne and Wear Passenger Transport Executive T/A Nexus | Other | 1 | £61k | 0.0% | 2019-11-25 |
| Bury Council | Other | 1 | £60k | 0.0% | 2019-11-26 |
| Bradford Metropolitan District Council | Other | 1 | £57k | 0.0% | 2018-04-03 |
| Department for Education | Other | 1 | £51k | 0.0% | 2019-04-02 |
| Maritime & Coastguard Agency | Other | 2 | £45k | 0.0% | 2018-07-14 |
| Milton Keynes Council Electronic Tendering Site | Other | 1 | £43k | 0.0% | 2016-11-29 |
| East Lindsey District Council | Other | 1 | £42k | 0.0% | 2019-08-10 |
| Defence Infrastructure Organisation | Other | 1 | £42k | 0.0% | 2018-12-19 |
| LEEDS TRINITY UNIVERSITY | Other | 2 | £42k | 0.0% | 2019-08-06 |
| Government Digital Service | Other | 2 | £36k | 0.0% | 2017-03-25 |
| NHS Arden and Greater East Midlands Commissioning Support Unit | Other | 1 | £33k | 0.0% | 2018-06-18 |
| South Tyneside Council | Other | 1 | £30k | 0.0% | 2019-12-12 |
| Competition and Markets Authority | Other | 1 | £28k | 0.0% | 2019-03-25 |
| Northern Lighthouse Board | Other | 1 | £24k | 0.0% | 2017-11-10 |
| COLLEGE OF POLICING LIMITED | Other | 1 | £24k | 0.0% | 2019-03-06 |
| Defence Business Service | Other | 1 | £23k | 0.0% | 2018-10-30 |
| NHS Business Services Authority | Other | 1 | £20k | 0.0% | 2021-02-11 |
| Office for Students | Other | 1 | £20k | 0.0% | 2019-12-16 |
| Leeds City Council | Other | 1 | £13k | 0.0% | 2019-03-29 |
| Care Quality Commission | Other | 1 | £11k | 0.0% | 2017-07-13 |
| Redditch Borough & Bromsgrove District Councils | Other | 1 | £6k | 0.0% | 2020-08-04 |
| B F I | Other | 1 | £2k | 0.0% | 2019-07-23 |
| SE Shared Services | Other | 1 | £0k | 0.0% | 2020-06-11 |
| Thirteen Housing Group Ltd | Other | 1 | £0k | 0.0% | 2020-02-10 |
| Office for National Statistics | Other | 1 | £0k | 0.0% | 2019-02-14 |
| North of England Commercial Procurement Collaborative (NOE CPC) | Other | 1 | £0k | 0.0% | 2018-08-08 |
| Offshore Renewable Energy Catapult | Other | 1 | £0k | 0.0% | 2016-05-11 |
| Dorset HealthCare University NHS Foundation Trust | Other | 1 | £0k | 0.0% | 2016-03-17 |
| Procurement Services - Lifecycle on behalf of COMMERCIAL SERVICES KENT LIMITED | Other | 1 | £0k | 0.0% | |