| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CRUMLIN CAPITAL NO. 2 LIMITED | 12543393 | 09/03/2022 | Dissolved |
| KELTBRAY ENERGY LIMITED | 12930461 | 28/10/2020 | Silver |
| KELTBRAY HIGHWAYS LIMITED | 12788652 | 07/10/2021 | Amber |
| KELTBRAY INFRASTRUCTURE MANAGEMENT SERVICES LIMITED | 15576040 | 19/03/2024 | Amber |
| KELTBRAY INFRASTRUCTURE PLANT LIMITED | 14882585 | 19/05/2023 | Bronze |
| KELTBRAY INFRASTRUCTURE SERVICES LIMITED | 14882565 | 19/05/2023 | Bronze |
| KELTBRAY RAIL LIMITED | 06000882 | 11/09/2020 | One Red Flag |
| OSPREY BIDCO LIMITED | 15819536 | 15/08/2024 | Amber |
| OSPREY DEBTCO LIMITED | 15868953 | 15/08/2024 | Amber |
| OSPREY INFRASTRUCTURE SERVICES LIMITED | 15489635 | 14/02/2024 | Strike Off |
| OSPREY MIDCO LIMITED | 15819379 | 15/08/2024 | Amber |
| RAILWAY INDUSTRY ASSOCIATION | 10036044 | 01/03/2016 | Silver |
| RAPIDE A POWERLINES INEO KELTBRAY JOINT VENTURE LTD | 12727835 | 17/09/2021 | Not Trading |
| WENTWORTH HOUSE RAIL SYSTEMS LIMITED | 06696437 | 28/10/2020 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABC ELECTRIFICATION LTD | 08193420 | 29/08/2012 | 19/12/2013 | Gold |
| COSTAIN INTEGRATED TECHNOLOGY SOLUTIONS LIMITED | 01439838 | 05/07/2016 | 31/03/2020 | Gold |
| COSTAIN LIMITED | 00610201 | 10/07/2008 | 31/03/2020 | Silver |
| COSTAIN OIL, GAS & PROCESS LIMITED | 00786418 | 06/01/2016 | 31/03/2020 | One Red Flag |
| HIPER ENERGY LIMITED | 14314057 | 23/08/2022 | 15/08/2024 | Not Trading |
| HIPER PILE LIMITED | 14314100 | 23/08/2022 | 15/08/2024 | Not Trading |
| KELTBRAY (BE) HOLDINGS LIMITED | 14882549 | 19/05/2023 | 15/08/2024 | Bronze |
| KELTBRAY BUILT ENVIRONMENT LIMITED | 12548732 | 28/10/2020 | 15/08/2024 | One Red Flag |
| KELTBRAY CONSULTING & ENGINEERING LIMITED | 12932398 | 27/10/2020 | 15/08/2024 | Bronze |
| KELTBRAY ENVIRONMENTAL LTD | 06564049 | 28/10/2020 | 15/08/2024 | Bronze |
| KELTBRAY ENVIRONMENTAL MATERIALS MANAGEMENT LIMITED | 06872836 | 28/10/2020 | 30/06/2021 | Amber |
| KELTBRAY GROUP (HOLDINGS) LIMITED | 02810840 | 24/06/2020 | 30/06/2021 | Amber |
| KELTBRAY HOLDINGS LIMITED | 12543807 | 28/10/2020 | 15/08/2024 | Bronze |
| KELTBRAY LIMITED | 01274344 | 27/10/2020 | 30/06/2021 | One Red Flag |
| KELTBRAY MANAGEMENT SERVICES LIMITED | 12932693 | 28/10/2020 | 15/08/2024 | Bronze |
| KELTBRAY PLANT LIMITED | 01675402 | 28/10/2020 | 15/08/2024 | Silver |
| KELTBRAY STRUCTURES LIMITED | 10325243 | 28/10/2020 | 30/06/2021 | Bronze |
| KERR PROPERTY HOLDINGS LIMITED | NI644170 | 28/10/2020 | 15/08/2024 | One Red Flag |
| PROMANEX (CIVILS & INDUSTRIAL SERVICES) LIMITED | 02224393 | 20/08/2011 | 31/03/2020 | Not Trading |
| PROMANEX (CONSTRUCTION & MAINTENANCE SERVICES) LIMITED | 03548978 | 20/08/2011 | 31/03/2020 | Not Trading |
| PROMANEX (TOTAL FM & ENVIRONMENTAL SERVICES) LIMITED | 03230494 | 20/08/2011 | 31/03/2020 | Bronze |
| PROMANEX GROUP HOLDINGS LIMITED | 05933523 | 20/08/2011 | 31/03/2020 | Dissolved |
| PROMANEX GROUP LIMITED | 03895753 | 20/08/2011 | 31/03/2020 | Dissolved |
| WENTWORTH HOUSE PARTNERSHIP LIMITED | 03673466 | 27/10/2020 | 15/08/2024 | Gold |