| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| 02065665 LIMITED | 02065665 | 10/03/2021 | Dissolved |
| A.P.E. -ALLEN GEARS LIMITED | 00523604 | 10/03/2021 | Dissolved |
| ALLEN POWER ENGINEERING LIMITED | 01189540 | 10/03/2021 | Dissolved |
| JOHN THOMPSON 00315157 LIMITED | 00315157 | 10/03/2021 | Dissolved |
| NEI COMBUSTION ENGINEERING LIMITED | 02208615 | 10/03/2021 | Dissolved |
| NEI OVERSEAS HOLDINGS LIMITED | 01189545 | 10/03/2021 | Strike Off |
| ROLLS-ROYCE INDUSTRIAL POWER INVESTMENTS LIMITED | 00070210 | 10/03/2021 | Dissolved |
| ROLLS-ROYCE TRANSMISSION & DISTRIBUTION LIMITED | 03182461 | 10/03/2021 | Dissolved |
| SPARE IPG (CEL) LIMITED | 02901133 | 10/03/2021 | Dissolved |
| SPARE IPG 11 LIMITED | 00570155 | 10/03/2021 | Dissolved |
| SPARE IPG 18 LIMITED | 02116731 | 10/03/2021 | Dissolved |
| SPARE IPG 22 LIMITED | 00647226 | 10/03/2021 | Dissolved |
| SPARE IPG 28 LIMITED | 00073104 | 10/03/2021 | Dissolved |
| SPARE IPG 3 LIMITED | 00390588 | 10/03/2021 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ROLLS-ROYCE FUEL CELL SYSTEMS LIMITED | 04433075 | 18/01/2018 | 12/03/2020 | Gold |
| ROLLS-ROYCE POWER ENGINEERING LIMITED | 01305027 | 21/07/2020 | 27/07/2023 | Silver |