| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BLACKBOURNE ECL LIMITED | NI024607 | 18/06/1990 | Dissolved |
| BLACKBOURNE LIMITED | NI007963 | 29/06/1970 | Insolvent |
| BLACKBOURNE SUSTAINABLE PRODUCTS LIMITED | NI612780 | 17/05/2012 | Dissolved |
| JERAS LIMITED | NI602501 | 16/03/2010 | Silver |
| KARL - NORTHERN LIMITED | NI034758 | 21/12/1998 | Dissolved |
| KARL AIRPORT PARKING LIMITED | NI022047 | 19/10/1988 | Not Trading |
| KARL ASSET MANAGEMENT LTD | NI619013 | 21/06/2013 | Silver |
| KARL CONSTRUCTION (SCOTLAND) LIMITED | SC184501 | 30/03/1998 | Dissolved |
| KARL CONSTRUCTION LIMITED | NI011017 | 19/11/1975 | Not Trading |
| KARL DEVELOPMENTS LTD | NI033590 | 06/02/1998 | Not Trading |
| KARL HOLDINGS LIMITED | NI022050 | 19/10/1988 | Silver |
| KARL PROPERTIES LIMITED | NI026941 | 14/10/1992 | Not Trading |
| KARL PROPERTY INVESTMENTS LIMITED | NI606512 | 16/05/2011 | Bronze |
| Karl Plant Ltd | NI028054 | 30/12/1993 | Dissolved |
| Karl Wells Ltd | 03166772 | 15/03/1996 | Dissolved |
| LAW BUILDING SERVICES LIMITED | NI666081 | 02/12/2019 | Not Trading |
| LUCHS LTD | NI654231 | 05/07/2018 | Dissolved |
| MUSCHKA LTD | NI654204 | 04/07/2018 | Dissolved |
| OBEL 64 LIMITED | NI615686 | 27/11/2012 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BVJV LIMITED | NI619802 | 07/03/2018 | 02/12/2019 | Silver |
| CONSUL SERVICES (NI) LIMITED | NI033040 | 02/10/1997 | 30/09/2022 | Bronze |
| CONSUL SERVICES HOLDINGS LIMITED | NI053084 | 01/01/2005 | 30/09/2022 | One Red Flag |
| DONEGALL QUAY LIMITED | NI043501 | 26/06/2002 | 23/03/2016 | Dissolved |
| DONEGALL QUAY MANAGEMENT COMPANY LIMITED | NI054361 | 03/06/2008 | 01/03/2013 | Bronze |
| KARL GREENFARM PROPERTIES LIMITED | NI047955 | 26/09/2003 | 01/02/2021 | Dissolved |
| OBEL LIMITED | NI054487 | 10/03/2008 | 29/04/2016 | Dissolved |
| OBEL OFFICES LIMITED | NI602941 | 23/04/2010 | 29/04/2016 | Dissolved |