| ANGLIAN WATER SERVICES LIMITEDNew | Other | 8 | £480m | 81.2% | 2025-12-10 |
| Transport for London | Other | 6 | £74m | 12.6% | 2020-02-27 |
| EFFICIENCY EAST MIDLANDS LIMITED | Other | 1 | £25m | 4.2% | 2019-11-13 |
| Barcud Shared ServicesNew | Other | 1 | £3m | 0.5% | 2026-04-13 |
| Manchester City Council | Other | 1 | £2m | 0.3% | 2018-06-08 |
| Devon County Council | Other | 5 | £1m | 0.2% | 2025-04-04 |
| Newcastle City Council | Other | 2 | £1m | 0.2% | 2021-12-06 |
| Espo | Other | 1 | £625k | 0.1% | 2020-08-17 |
| Swale Borough Council | Other | 1 | £600k | 0.1% | 2021-11-09 |
| WAKEFIELD COUNCIL | Other | 1 | £500k | 0.1% | 2016-03-24 |
| National Highways | Other | 11 | £360k | 0.1% | 2021-09-15 |
| Wigan Council | Other | 1 | £350k | 0.1% | 2017-08-22 |
| East Midlands Housing Group | Other | 2 | £294k | 0.0% | 2021-04-23 |
| EN:PROCURE LIMITED | Other | 2 | £240k | 0.0% | 2019-01-13 |
| Lancashire Constabulary | Other | 1 | £235k | 0.0% | 2022-08-24 |
| Darlington Borough Council | Other | 2 | £190k | 0.0% | 2024-12-03 |
| Karbon Homes | Other | 3 | £182k | 0.0% | 2021-03-25 |
| Middlesbrough Council | Other | 2 | £175k | 0.0% | 2024-01-27 |
| West Lancashire Borough CouncilNew | Other | 2 | £147k | 0.0% | 2025-03-31 |
| Leicestershire County Council | Other | 1 | £143k | 0.0% | 2020-01-28 |
| Corserv Limited | Other | 1 | £118k | 0.0% | 2019-03-22 |
| Borough Council of Kings Lynn and West Norfolk | Other | 2 | £115k | 0.0% | 2024-11-15 |
| Wakefield and District Housing limited | Other | 1 | £100k | 0.0% | 2017-09-22 |
| Nuneaton & Bedworth BC (NUN) | Other | 1 | £89k | 0.0% | 2022-07-20 |
| Richmondshire District Council | Other | 1 | £75k | 0.0% | 2022-10-17 |
| Bolsover District Council | Other | 1 | £71k | 0.0% | 2023-06-05 |
| BIP SOLUTIONS LIMITED | Other | 1 | £68k | 0.0% | 2021-12-03 |
| Bradford Metropolitan District Council | Other | 1 | £62k | 0.0% | 2020-01-02 |
| East Riding of Yorkshire | Other | 1 | £60k | 0.0% | 2020-09-15 |
| GREATER MANCHESTER EDUCATION TRUST | Other | 1 | £50k | 0.0% | 2021-09-13 |
| Sunderland City Council | Other | 1 | £50k | 0.0% | 2019-05-29 |
| Homes England (the name adopted by the Homes and Communities Agency)New | Other | 1 | £44k | 0.0% | 2024-05-31 |
| North Lincolnshire Council | Other | 3 | £40k | 0.0% | 2025-10-20 |
| Rochdale Metropolitan Borough Council | Other | 1 | £20k | 0.0% | 2021-09-30 |
| Halton Borough Council | Other | 1 | £19k | 0.0% | 2018-10-15 |
| Sandwell Metropolitan Borough Council | Other | 1 | £18k | 0.0% | 2021-11-25 |
| Platform Housing Ltd | Other | 1 | £13k | 0.0% | 2023-07-04 |
| London Borough of Enfield | Other | 1 | £9k | 0.0% | 2019-05-30 |
| THAMES WATER UTILITIES LIMITEDNew | Other | 2 | £0k | 0.0% | 2026-05-14 |
| NOE CPC | Other | 1 | £0k | 0.0% | 2019-12-13 |
| Dorset HealthCare University NHS Foundation Trust | Other | 1 | £0k | 0.0% | 2018-03-14 |
| The Council of the Borough of Kirklees | Other | 1 | £0k | 0.0% | |
| Southern Water Services Ltd. | Other | 5 | £0k | 0.0% | |
| Blackpool Council | Other | 1 | £0k | 0.0% | |
| Mosscare St Vincent's Housing Group Limited | Other | 1 | £0k | 0.0% | |
| Nottinghamshire County Council | Other | 1 | £0k | 0.0% | |
| Shettleston Housing Association Ltd | Other | 1 | £0k | 0.0% | |
| YORKSHIRE WATER SERVICES LIMITED | Other | 1 | £0k | 0.0% | |
| Offshore Renewable Energy Catapult | Other | 1 | £0k | 0.0% | |
| Aberdeen City Council | Other | 1 | £0k | 0.0% | |
| Hillcrest | Other | 2 | £0k | 0.0% | |
| Wrexham County Borough Council | Other | 1 | £0k | 0.0% | |
| South Lanarkshire Council | Other | 1 | £0k | 0.0% | |
| Oak Tree Housing Association Ltd | Other | 1 | £0k | 0.0% | |
| South Ayrshire Council | Other | 1 | £0k | 0.0% | |
| Sanctuary Housing Group | Other | 1 | £0k | 0.0% | |
| ONGO HOMES LTD | Other | 2 | £0k | 0.0% | |
| Cyngor Gwynedd | Other | 1 | £0k | 0.0% | |
| The City of Edinburgh Council | Other | 1 | £0k | 0.0% | |
| City of Bradford Metropolitan District Council | Other | 1 | £0k | 0.0% | |
| Edinburgh Napier University | Other | 1 | £0k | 0.0% | |
| NORTHUMBRIAN WATER LIMITED | Other | 1 | £0k | 0.0% | |
| WESSEX WATER SERVICES LIMITED | Other | 2 | £0k | 0.0% | |
| Epping Forest District Council | Other | 1 | £0k | 0.0% | |