| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ANDREWS ASSOCIATES ENGINEERS LIMITED | 13611375 | 06/12/2022 | One Red Flag |
| INTEGRUM POWER ENGINEERING LTD | 10956687 | 08/06/2023 | Bronze |
| OAT BIDCO LIMITED | 14178206 | 13/09/2022 | Bronze |
| OCU (PLANT) LIMITED | 09388526 | 04/08/2022 | One Red Flag |
| OCU (PROPERTY ESTATES) LIMITED | 09397606 | 04/08/2022 | Not Trading |
| OCU (TRENCHLESS) LIMITED | 09388527 | 04/08/2022 | Not Trading |
| OCU ACADEMY LIMITED | 06259041 | 10/07/2023 | Bronze |
| OCU ENERGY SERVICES LIMITED | 14456204 | 01/12/2022 | Amber |
| OCU GROUP LTD | 09307607 | 04/08/2022 | One Red Flag |
| OCU HORNBILL GROUP LIMITED | 13296183 | 10/07/2023 | Silver |
| OCU HORNBILL LIMITED | 02347181 | 10/07/2023 | Silver |
| OCU MODUS LIMITED | 04444970 | 20/06/2023 | Bronze |
| OCU NETTWORX LIMITED | NI612801 | 05/03/2024 | Silver |
| OCU POWER GRID PLANT LIMITED | NI649666 | 05/03/2024 | One Red Flag |
| OCU UTILITY SERVICES LIMITED | 02916906 | 04/08/2022 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| OCU OPALS LIMITED | 08152431 | 09/08/2022 | 16/08/2023 | Amber |
| OCU OPALS SERVICES LIMITED | 10894906 | 09/08/2022 | 16/08/2023 | One Red Flag |