| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ENHANCE ACADEMY TRUST | 07904096 | 09/12/2016 | Silver |
| GLANDWR CYFYNGEDIG | 04154570 | 08/10/2018 | Not Trading |
| KELDA ENERGY SERVICES (OLD WHITTINGTON) LTD | 06690788 | 30/04/2019 | Dissolved |
| KELDA ENERGY SERVICES LIMITED | 06690743 | 31/12/2018 | Dissolved |
| KELDA FINANCE (NO.1) LIMITED | 08066326 | 08/10/2018 | Silver |
| KELDA FINANCE (NO.3) PLC | 08270049 | 08/10/2018 | Silver |
| KELDA GROUP LIMITED | 02366627 | 08/10/2018 | Gold |
| KELDA LIMITED | 02179230 | 08/10/2018 | Gold |
| KELDA NON-REG HOLDCO LIMITED | 06433788 | 08/10/2018 | Dissolved |
| KELDA ORGANIC ENERGY (LEEDS) LTD | 09835984 | 30/04/2019 | Dissolved |
| KELDA ORGANIC ENERGY (YORKSHIRE) LTD | 09836091 | 30/04/2019 | Dissolved |
| KELDA WATER SERVICES (PROJECTS) LIMITED | 06690873 | 31/12/2018 | Not Trading |
| OMNETICA HOLDING LIMITED | 04492919 | 30/11/2016 | Dissolved |
| SAFE-MOVE LIMITED | 04868680 | 08/10/2018 | Not Trading |
| SALTAIRE WATER LIMITED | 06433802 | 08/10/2018 | Bronze |
| YORKSHIRE WATER ESTATES LIMITED | 03174657 | 08/10/2018 | Dissolved |
| YORKSHIRE WATER LIMITED | 03778498 | 08/10/2018 | Not Trading |
| YORKSHIRE WATER PROJECTS LIMITED | 03028361 | 08/10/2018 | Dissolved |
| YORKSHIRE WATER SERVICES HOLDINGS LIMITED | 06815156 | 08/10/2018 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| KELDA FINANCE (NO.2) LIMITED | 08072102 | 08/10/2018 | 25/05/2023 | Silver |
| KINGSTON COMMUNICATIONS QUEST TRUSTEES LIMITED | 03942998 | 16/03/2015 | 17/01/2017 | Dissolved |
| YORKSHIRE WATER FINANCE PLC | 11444372 | 08/10/2018 | 19/10/2020 | Amber |
| YORKSHIRE WATER SERVICES FINANCE LIMITED | 04636719 | 08/10/2018 | 19/10/2020 | Bronze |