| THE GUINNESS PARTNERSHIP LIMITEDNew | Other | 2 | £250m | 42.3% | 2025-09-30 |
| Royal Borough of GreenwichNew | Other | 1 | £200m | 33.8% | 2025-11-26 |
| Catalyst Housing Limited | Other | 3 | £42m | 7.1% | 2022-05-30 |
| The Barnet Group | Other | 3 | £28m | 4.7% | 2024-03-31 |
| Barnet Homes Ltd | Other | 2 | £17m | 2.9% | 2020-12-03 |
| Homerton Healthcare | Other | 1 | £16m | 2.7% | 2023-07-27 |
| The Hillingdon Hospitals NHS Foundation Trust | Other | 6 | £5m | 0.8% | 2022-03-02 |
| London Borough of Hackney | Other | 2 | £5m | 0.8% | 2022-02-08 |
| University of Portsmouth Higher Education CorporationNew | Other | 2 | £4m | 0.7% | 2025-07-11 |
| Islington CouncilNew | Other | 1 | £4m | 0.7% | 2024-07-24 |
| Fusion21 Members Consortium | Other | 6 | £4m | 0.7% | 2023-12-19 |
| London Borough of Camden | Other | 1 | £3m | 0.5% | 2023-01-05 |
| London Borough of Hillingdon | Other | 1 | £3m | 0.5% | 2022-03-21 |
| The Trustees of the British Museum | Other | 2 | £3m | 0.5% | 2024-05-01 |
| Board of Trustees of the Royal Botanic Gardens Kew | Other | 1 | £2m | 0.3% | 2022-11-18 |
| Royal Free London NHS Foundation Trust | Other | 1 | £1m | 0.2% | 2022-03-03 |
| City of London Corporation | Other | 1 | £1m | 0.2% | 2017-07-24 |
| Partners Procurement Service (PPS)New | Other | 1 | £997k | 0.2% | 2024-08-14 |
| East London NHS Foundation TrustNew | Other | 1 | £551k | 0.1% | 2025-01-27 |
| The Guinness Partnership Ltd | Other | 1 | £439k | 0.1% | 2021-05-17 |
| capitalEsourcing | Other | 1 | £379k | 0.1% | 2020-04-08 |
| University of PortsmouthNew | Other | 1 | £271k | 0.0% | 2025-08-01 |
| University College London Hospitals NHS Foundation Trust | Other | 9 | £239k | 0.0% | 2022-10-13 |
| L&Q Construction | Other | 1 | £237k | 0.0% | 2019-10-07 |
| Hightown Housing Association Ltd | Other | 1 | £70k | 0.0% | 2021-11-10 |
| Royal Holloway and Bedford New College, known as Royal Holloway, University of London | Other | 1 | £0k | 0.0% | 2017-12-21 |
| BIRKBECK COLLEGENew | Other | 2 | £0k | 0.0% | 2024-09-03 |
| Communities & Housing Investment Consortium Ltd (CHIC)New | Other | 2 | £0k | 0.0% | 2025-11-26 |
| London Construction Programme on behalf of The Guinness Partnership | Other | 1 | £0k | 0.0% | |
| Islington | Other | 1 | £0k | 0.0% | |
| Homerton University Hospital NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Kingston Upon Hull City Council | Other | 1 | £0k | 0.0% | |
| Great Ormond Street Hospital for Children NHS Foundation Trust | Other | 2 | £0k | 0.0% | |
| Queen Victoria Hospital NHS Foundation Trust | Other | 1 | £0k | 0.0% | |
| Southern Housing Group | Other | 1 | £0k | 0.0% | |
| LONDON SOUTH BANK UNIVERSITY | Other | 1 | £0k | 0.0% | |
| Peabody Trust | Other | 1 | £0k | 0.0% | |
| London Borough of Haringey | Other | 1 | £0k | 0.0% | |
| Notting Hill Genesis | Other | 1 | £0k | 0.0% | |
| BANK OF ENGLAND | Other | 2 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 1 | £0k | 0.0% | |