| Company | Bulk supply transactions |
|---|---|
| Affinity Water | AFW bulk supply |
| Anglian Water | ANH bulk supply |
| Bournemouth Water | BWH bulk supply |
| Bristol Water | BRL bulk supply |
| Dee Valley Water | DVW bulk supply |
| Dŵr Cymru | WSH bulk supply |
| Northumbrian Water | NEW bulk supply |
| Peel Water Networks | PWN bulk supply |
| Portsmouth Water | PRT bulk supply |
| Sutton and East Surrey Water | SES bulk supply |
| South East Water | SEW bulk supply |
| Southern Water | SRN bulk supply |
| SSE Water | SSE bulk supply |
| Severn Trent Water | SVT bulk supply |
| South West Water | SWT bulk supply |
| Thames Water | TMS bulk supply |
| South Staffs Water | SSC bulk supply |
| United Utilities Water | NWT bulk supply |
| Wessex Water | WSX bulk supply |
| Yorkshire Water | YKY bulk supply |