| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BELFAST GAS TRANSMISSION LIMITED | NI026420 | 01/01/2019 | Amber |
| MOYLE INTERCONNECTOR LIMITED | NI036562 | 01/01/2019 | Gold |
| MUTUAL ENERGY LIMITED | NI053759 | 01/01/2019 | Silver |
| PREMIER TRANSMISSION LIMITED | NI026421 | 01/01/2019 | Gold |
| TOKAMAK SOLUTIONS EBT LIMITED | 08496735 | 01/10/2019 | Silver |
| WEST TRANSMISSION LIMITED | NI073229 | 01/01/2019 | Amber |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ANGLESEY LNG LIMITED | 05297325 | 01/11/2010 | 15/04/2013 | One Red Flag |
| CENTRAL SCHOOL OF BALLET CHARITABLE TRUST LIMITED(THE) | 01657717 | 13/11/2008 | 20/10/2022 | Bronze |
| Capel,James,Research Ltd | 00953814 | 02/11/1992 | 23/01/1995 | Dissolved |
| HALITE ENERGY GROUP LIMITED | 04145789 | 01/11/2010 | 15/04/2013 | Amber |
| HSBC INVESTMENT RESIDUARY LIMITED | 00976092 | 05/02/1993 | 31/07/1997 | Dissolved |
| JAMES CAPEL HOLDINGS LIMITED | 01838555 | 01/01/1994 | 20/12/1996 | Dissolved |
| PITKIN PETROLEUM LIMITED | 05416227 | 01/12/2009 | 01/01/2015 | Gold |
| REGULATORY POLICY INSTITUTE | 02659216 | 01/02/2019 | 30/09/2024 | Silver |