| Scape Group Limited | Other | 7 | £6.1bn | 52.0% | 2021-09-08 |
| CTM Portal for the NDA Shared Services Alliance | Other | 1 | £1.5bn | 12.8% | 2019-05-30 |
| Sellafield LtdNew | Other | 1 | £982m | 8.4% | 2025-10-10 |
| National Highways | Other | 5 | £812m | 6.9% | 2022-05-26 |
| DIO Commercial | Other | 2 | £519m | 4.4% | 2023-06-14 |
| Sheffield City Council | Other | 2 | £275m | 2.3% | 2019-12-13 |
| Devon County Council | Other | 2 | £272m | 2.3% | 2021-12-06 |
| East Riding of Yorkshire | Other | 2 | £201m | 1.7% | 2020-04-29 |
| Transport for London | Other | 4 | £182m | 1.6% | 2023-05-02 |
| Ministry of JusticeNew | Other | 1 | £126m | 1.1% | 2025-08-05 |
| Hampshire County Council | Other | 21 | £77m | 0.7% | 2026-04-30 |
| Oldham Council | Other | 2 | £64m | 0.5% | 2022-01-06 |
| University of GreenwichNew | Other | 2 | £60m | 0.5% | 2024-12-11 |
| Ministry of Defence | Other | 2 | £58m | 0.5% | 2023-11-02 |
| Buckinghamshire Council | Other | 7 | £43m | 0.4% | 2024-08-27 |
| Leicester City Council | Other | 2 | £33m | 0.3% | 2021-06-02 |
| University of Central Lancashire | Other | 1 | £29m | 0.2% | 2023-09-12 |
| Leeds City CouncilNew | Other | 3 | £28m | 0.2% | 2025-02-17 |
| THE UNIVERSITY OF BIRMINGHAM | Other | 2 | £26m | 0.2% | 2021-05-14 |
| Test Valley Borough CouncilNew | Other | 1 | £25m | 0.2% | 2026-05-19 |
| Leeds City Council - PACS | Other | 1 | £25m | 0.2% | 2022-04-08 |
| National Highways Limited | Other | 6 | £24m | 0.2% | 2022-10-06 |
| University of PortsmouthNew | Other | 1 | £23m | 0.2% | 2025-09-03 |
| North East Lincolnshire Council | Other | 1 | £21m | 0.2% | 2023-03-07 |
| Solent University | Other | 1 | £21m | 0.2% | 2019-03-01 |
| Metropolitan Police ServiceNew | Other | 2 | £18m | 0.2% | 2025-03-17 |
| Police, Fire & Crime Commissioner for StaffordshireNew | Other | 1 | £18m | 0.2% | 2025-07-02 |
| East Riding of Yorkshire Council | Other | 1 | £17m | 0.1% | 2022-04-07 |
| Norfolk County Council | Other | 2 | £14m | 0.1% | 2019-10-22 |
| City of Bradford Metropolitan District CouncilNew | Other | 3 | £14m | 0.1% | 2026-01-13 |
| West Yorkshire Combined AuthorityNew | Other | 1 | £12m | 0.1% | 2025-04-09 |
| Defence Science and Technology Laboratory | Other | 11 | £12m | 0.1% | 2026-03-27 |
| Cambridgeshire County Council | Other | 4 | £11m | 0.1% | 2018-07-01 |
| South Gloucestershire CouncilNew | Other | 1 | £11m | 0.1% | 2025-02-03 |
| Dorset county Council | Other | 1 | £10m | 0.1% | 2018-09-30 |
| Somerset CouncilNew | Other | 2 | £7m | 0.1% | 2026-03-12 |
| WAKEFIELD COUNCIL | Other | 1 | £7m | 0.1% | 2022-08-31 |
| Sandwell Metropolitan Borough Council | Other | 1 | £7m | 0.1% | 2022-11-01 |
| Isle of Wight Council | Other | 2 | £5m | 0.0% | 2021-11-18 |
| Herefordshire Council | Other | 1 | £5m | 0.0% | 2018-10-05 |
| London Borough of Hackney | Other | 2 | £5m | 0.0% | 2025-01-23 |
| Procurement for HousingNew | Other | 3 | £3m | 0.0% | 2024-12-10 |
| UNIVERSITY OF GLOUCESTERSHIRE | Other | 2 | £3m | 0.0% | 2022-01-21 |
| Plymouth City Council | Other | 3 | £3m | 0.0% | 2026-04-20 |
| Liverpool City Council | Other | 2 | £3m | 0.0% | 2024-11-04 |
| UNIVERSITY OF DERBY | Other | 7 | £3m | 0.0% | 2022-06-20 |
| Stevenage Borough CouncilNew | Other | 2 | £2m | 0.0% | 2025-06-27 |
| Arts University Bournemouth | Other | 2 | £2m | 0.0% | 2023-03-29 |
| Southampton City Council | Other | 1 | £1m | 0.0% | 2019-12-23 |
| Department for Education | Other | 9 | £1m | 0.0% | 2022-04-14 |
| DERBY CITY COUNCIL | Other | 2 | £1m | 0.0% | 2023-03-21 |
| WESTWORKS PROCUREMENT LIMITED | Other | 2 | £992k | 0.0% | 2023-11-10 |
| Suffolk Coastal District Council and Waveney District CouncilNew | Other | 1 | £777k | 0.0% | 2026-02-17 |
| Mid Devon District Council | Other | 1 | £729k | 0.0% | 2017-03-30 |
| Cornwall Council | Other | 1 | £428k | 0.0% | 2023-09-22 |
| Derbyshire County Council | Other | 2 | £403k | 0.0% | 2019-02-04 |
| Yorkshire and Humber Police Procurement (Y&HPP) | Other | 1 | £400k | 0.0% | 2024-01-09 |
| NHS Blood and Transplant (Filton, Bristol)New | Other | 1 | £250k | 0.0% | 2026-04-30 |
| Borough Council of Kings Lynn and West NorfolkNew | Other | 1 | £187k | 0.0% | 2025-06-16 |
| Kirklees Council | Other | 1 | £90k | 0.0% | 2023-07-27 |
| Peterborough City CouncilNew | Other | 1 | £31k | 0.0% | 2024-06-17 |
| Nottingham City Council | Other | 1 | £20k | 0.0% | 2018-07-18 |
| Wirral CouncilNew | Other | 3 | £0k | 0.0% | 2026-03-19 |
| DEFRA | Other | 2 | £0k | 0.0% | 2022-09-21 |
| Solihull MBC (SOL) | Other | 1 | £0k | 0.0% | 2020-10-22 |
| Essex County Council | Other | 3 | £0k | 0.0% | 2016-03-01 |
| Manchester City Council | Other | 2 | £0k | 0.0% | |
| Scottish Government | Other | 6 | £0k | 0.0% | |
| University of Glasgow | Other | 2 | £0k | 0.0% | |
| WESSEX WATER SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| Network Rail Infrastructure Ltd | Other | 3 | £0k | 0.0% | |
| GREATER MANCHESTER EDUCATION TRUST | Other | 2 | £0k | 0.0% | |
| NATIONAL GRID ELECTRICITY TRANSMISSION PLC | Other | 1 | £0k | 0.0% | |
| Cyngor Gwynedd | Other | 2 | £0k | 0.0% | |
| Kingston Upon Hull City Council | Other | 3 | £0k | 0.0% | |
| Great Ormond Street Hospital for Children NHS Foundation Trust | Other | 3 | £0k | 0.0% | |
| The Association of North East Councils Limited | Other | 1 | £0k | 0.0% | |
| Scottish Hydro Electric Power Distribution Plc | Other | 5 | £0k | 0.0% | |
| Kent County Council | Other | 1 | £0k | 0.0% | |
| The Highland Council | Other | 2 | £0k | 0.0% | |
| SP TRANSMISSION PLC | Other | 7 | £0k | 0.0% | |
| Carmarthenshire County Council | Other | 2 | £0k | 0.0% | |
| East Sussex County Council | Other | 2 | £0k | 0.0% | |
| Cardiff Council | Other | 4 | £0k | 0.0% | |
| North Ayrshire Council | Other | 1 | £0k | 0.0% | |
| The Education Alliance | Other | 2 | £0k | 0.0% | |
| Cumbria County Council | Other | 1 | £0k | 0.0% | |
| Transport for London/Rail for London Limited | Other | 1 | £0k | 0.0% | |
| Central Bedfordshire Council | Other | 2 | £0k | 0.0% | |
| Sunderland City Council | Other | 1 | £0k | 0.0% | |