| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ITHACA (NE) E&P LIMITED | 01483021 | 03/10/2024 | Gold |
| ITHACA (NE) UKCS LIMITED | 03386464 | 03/10/2024 | Amber |
| ITHACA ALPHA (N.I.) LIMITED | NI073431 | 27/05/2024 | Silver |
| ITHACA CAUSEWAY LIMITED | 06167799 | 27/05/2024 | Not Trading |
| ITHACA DORSET LIMITED | 01135213 | 27/05/2024 | Not Trading |
| ITHACA EF LIMITED | 03772746 | 03/10/2024 | Silver |
| ITHACA ENERGY (NORTH SEA) PLC | SC595124 | 27/05/2024 | Amber |
| ITHACA ENERGY (UK) LIMITED | SC272009 | 27/05/2024 | Silver |
| ITHACA ENERGY DEVELOPMENTS UK LIMITED | 07105041 | 27/05/2024 | Bronze |
| ITHACA ENERGY HOLDINGS (UK) LIMITED | SC437615 | 27/05/2024 | Silver |
| ITHACA EPSILON LIMITED | 05979869 | 27/05/2024 | Silver |
| ITHACA EXPLORATION LIMITED | 05914627 | 27/05/2024 | Gold |
| ITHACA GAMMA LIMITED | 05929104 | 27/05/2024 | Silver |
| ITHACA MA LIMITED | 03947050 | 27/05/2024 | Silver |
| ITHACA MA(NS) LIMITED | SC238015 | 27/05/2024 | Not Trading |
| ITHACA MINERALS (NORTH SEA) LIMITED | SC274666 | 27/05/2024 | Silver |
| ITHACA OIL AND GAS LIMITED | 01546623 | 27/05/2024 | Amber |
| ITHACA PETROLEUM LIMITED | 05223667 | 27/05/2024 | Silver |
| ITHACA SP (HOLDINGS) LIMITED | 09102478 | 27/05/2024 | Amber |
| ITHACA SP BONDS PLC | 11029537 | 27/05/2024 | Silver |
| ITHACA SP E&P LIMITED | 01504603 | 27/05/2024 | Silver |
| ITHACA SP FINANCE LIMITED | 09102885 | 27/05/2024 | Amber |
| ITHACA SP O&G LIMITED | 09858988 | 27/05/2024 | Amber |
| ITHACA SP UK LIMITED | 02586927 | 27/05/2024 | Not Trading |
| ITHACA SPE LIMITED | 09103084 | 27/05/2024 | Gold |
| ITHACA UKCS LIMITED | 01019748 | 03/10/2024 | Silver |
| ITHACA ZETA LIMITED | 08860426 | 27/05/2024 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ITHACA EF LIMITED | 03772746 | 03/10/2024 | 03/10/2024 | Silver |