| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ARTHUR MCCANN, LIMITED | R0000046 | 12/07/2000 | Dissolved |
| FEDERATION OF BAKERS LIMITED | 11510353 | 05/12/2018 | Gold |
| HOWELL HOUSE LIMITED | NI060589 | 21/08/2006 | Dissolved |
| IRWINS QUALITY AGGREGATES LIMITED | NI612868 | 31/01/2013 | Gold |
| KENNETH IRWIN & SONS LIMITED | NI059203 | 24/07/2006 | Silver |
| MULLACH GLAS ONE LIMITED | NI059205 | 24/07/2006 | Amber |
| MULLACH GLAS THREE LIMITED | NI001415 | 17/09/2000 | Silver |
| MULLACH GLAS TWO LIMITED | NI017249 | 15/02/1984 | Silver |
| PRFC TRUSTEE COMPANY LIMITED | NI603740 | 08/07/2010 | Not Trading |
| TYRONE AGGREGATES LIMITED | NI612861 | 31/01/2013 | Dissolved |
| W.D. IRWIN & SONS (PORTADOWN) LIMITED | NI616671 | 25/02/2013 | Silver |
| W.D. IRWIN & SONS LIMITED | NI059204 | 24/07/2006 | Amber |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AIRGLEN LIMITED | NI022273 | 29/12/1988 | 25/08/2016 | One Red Flag |