| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| GARVAGH DEVELOPMENT TRUST | NI031966 | 17/02/1997 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BARR ENVIRONMENTAL LIMITED | SC162876 | 02/07/2007 | 30/09/2017 | Amber |
| BARR LIMITED | SC060291 | 02/07/2007 | 30/09/2017 | Bronze |
| BARR SUBCO 2 LIMITED | SC488563 | 12/11/2014 | 30/09/2017 | Amber |
| BREEDON AGGREGATES SW LIMITED | SC094144 | 09/09/2013 | 30/10/2014 | Silver |
| CARMEAN CHEMICALS LIMITED | NI016288 | 26/11/1982 | 29/06/2007 | Dissolved |
| CARMEAN LIMEWORKS LIMITED | NI001546 | 04/02/1942 | 29/06/2007 | Dissolved |
| HADDEN QUARRIES LIMITED | NI009495 | 25/05/1973 | 29/06/2007 | Dissolved |
| INSTITUTE OF QUARRYING(THE) | 00606601 | 08/02/2005 | 06/02/2007 | One Red Flag |
| J.T. GLOVER, LIMITED | NI001230 | 30/03/1938 | 29/06/2007 | Not Trading |
| JOHN MCLEAN & SONS (QUARRIES) LIMITED | NI013530 | 12/04/1979 | 28/06/2007 | Dissolved |
| MAPLE (237) LIMITED | 05283200 | 01/06/2006 | 04/08/2006 | Not Trading |
| MCLAUGHLIN & HARVEY CONSTRUCTION LIMITED | SC150486 | 02/07/2007 | 30/09/2017 | Gold |
| R.J. MAXWELL & SON LIMITED | NI002826 | 24/05/1950 | 29/06/2007 | Dissolved |
| TRENCH HOLDINGS LIMITED | NI062850 | 02/07/2007 | 30/09/2017 | Silver |