| The Association of North East Councils LimitedNew | Other | 2 | £925m | 31.0% | 2025-02-04 |
| YPO | Other | 8 | £366m | 12.3% | 2024-02-13 |
| CHESHIRE EAST COUNCIL | Other | 3 | £195m | 6.5% | 2023-12-06 |
| Espo | Other | 6 | £167m | 5.6% | 2022-07-06 |
| HS2 | Other | 3 | £123m | 4.1% | 2023-07-28 |
| Bournemouth Christchurch and Poole Council | Other | 2 | £112m | 3.8% | 2023-04-06 |
| West Sussex County CouncilNew | Other | 1 | £108m | 3.6% | 2026-03-31 |
| BANK OF ENGLANDNew | Other | 1 | £100m | 3.3% | 2025-08-12 |
| London Borough of Merton | Other | 3 | £80m | 2.7% | 2025-12-01 |
| Derbyshire County Council | Other | 2 | £75m | 2.5% | 2022-11-14 |
| Cheshire West and Chester CouncilNew | Other | 2 | £64m | 2.1% | 2024-12-16 |
| London Borough of Southwark | Other | 1 | £60m | 2.0% | 2018-03-20 |
| Lancashire County CouncilNew | Other | 1 | £60m | 2.0% | 2025-01-14 |
| Southampton City Council | Other | 2 | £58m | 1.9% | 2025-03-28 |
| Bracknell Forest Borough CouncilNew | Other | 1 | £48m | 1.6% | 2025-01-10 |
| South Tyneside CouncilNew | Other | 1 | £48m | 1.6% | 2025-04-28 |
| East Riding of Yorkshire Council | Other | 2 | £42m | 1.4% | 2025-03-19 |
| DERBY CITY COUNCIL | Other | 1 | £35m | 1.2% | 2024-02-10 |
| Bristol City Council | Other | 2 | £33m | 1.1% | 2024-03-11 |
| Staffordshire County CouncilNew | Other | 2 | £30m | 1.0% | 2024-05-28 |
| Ordnance SurveyNew | Other | 1 | £28m | 0.9% | 2024-10-25 |
| Norfolk County CouncilNew | Other | 1 | £24m | 0.8% | 2025-08-05 |
| North East Lincolnshire Council | Other | 2 | £24m | 0.8% | 2024-06-20 |
| Darlington Borough CouncilNew | Other | 1 | £18m | 0.6% | 2025-04-01 |
| capitalEsourcingNew | Other | 1 | £18m | 0.6% | 2024-10-31 |
| North Somerset CouncilNew | Other | 2 | £16m | 0.5% | 2025-09-23 |
| Bournemouth Borough Council | Other | 1 | £16m | 0.5% | 2016-12-03 |
| Lincolnshire County Council | Other | 1 | £13m | 0.4% | 2017-07-03 |
| Teignbridge District Council | Other | 2 | £12m | 0.4% | 2017-08-23 |
| Hull City CouncilNew | Other | 2 | £11m | 0.4% | 2024-08-13 |
| Nuneaton & Bedworth Borough Council | Other | 2 | £9m | 0.3% | 2025-10-29 |
| North Lincolnshire Council | Other | 1 | £9m | 0.3% | 2023-10-30 |
| Guildford Borough CouncilNew | Other | 1 | £9m | 0.3% | 2025-04-14 |
| Sunderland City CouncilNew | Other | 1 | £8m | 0.3% | 2025-02-04 |
| Barts Health NHS Trust | Other | 1 | £8m | 0.3% | 2023-02-01 |
| Borough Of Poole | Other | 1 | £6m | 0.2% | 2017-11-30 |
| Yorkshire Purchasing Organisation | Other | 1 | £5m | 0.2% | 2021-02-12 |
| Bath and North East Somerset CouncilNew | Other | 1 | £5m | 0.2% | 2025-08-11 |
| Exeter City Council | Other | 1 | £3m | 0.1% | 2022-12-15 |
| East Riding of Yorkshire | Other | 1 | £3m | 0.1% | 2020-03-19 |
| Aster Group Limited | Other | 1 | £3m | 0.1% | 2024-04-06 |
| Mid Devon District CouncilNew | Other | 1 | £3m | 0.1% | 2025-09-08 |
| North Devon District Council | Other | 2 | £3m | 0.1% | 2024-09-25 |
| RUGBY BOROUGH COUNCIL | Other | 1 | £3m | 0.1% | 2021-01-05 |
| UNIVERSITY OF WOLVERHAMPTON ENTERPRISE LIMITED | Other | 1 | £2m | 0.1% | 2022-07-07 |
| POLICE & CRIME COMMISSIONER FOR CLEVELANDNew | Other | 1 | £600k | 0.0% | 2026-03-25 |
| East Devon District Council | Other | 1 | £400k | 0.0% | 2016-03-14 |
| Milton Keynes CouncilNew | Other | 1 | £321k | 0.0% | 2024-08-14 |
| Tyne and Wear Passenger Transport Executive T/A NexusNew | Other | 1 | £314k | 0.0% | 2025-05-01 |
| Cleveland Fire AuthorityNew | Other | 1 | £140k | 0.0% | 2025-04-30 |
| Wealden District Council | Other | 1 | £121k | 0.0% | 2016-06-13 |
| East Staffordshire Borough Council | Other | 1 | £70k | 0.0% | 2024-01-19 |
| Crown Commercial Service | Other | 1 | £0k | 0.0% | 2015-06-23 |
| Welsh Government - Commercial Delivery | Other | 2 | £0k | 0.0% | |
| Cornwall Council | Other | 1 | £0k | 0.0% | |
| Gloucestershire County Council | Other | 2 | £0k | 0.0% | |
| Bedford Borough Council | Other | 1 | £0k | 0.0% | |