| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BRITISH AGGREGATES ASSOCIATION | SC208363 | 02/05/2024 | Silver |
| BROWN AND POTTER LIMITED | 02236517 | 01/03/2011 | Dissolved |
| MINERAL PRODUCTS ASSOCIATION (SCOTLAND) | SC248358 | 11/11/2024 | Silver |
| NORTHERN QUARRY PRODUCTS LIMITED | SC674828 | 08/08/2023 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BREEDON BOWEN LIMITED | 07745597 | 11/12/2017 | 04/02/2020 | Bronze |
| H. V. BOWEN & SONS (QUARRY) LTD | 07745354 | 11/12/2017 | 04/02/2020 | Gold |
| H. V. BOWEN & SONS (TRANSPORT) LIMITED | 02107727 | 11/12/2017 | 04/02/2020 | Not Trading |
| PSV (UK) LTD | 06768029 | 11/12/2017 | 04/02/2020 | Not Trading |
| SEWELLS RESERVOIR CONSTRUCTION LIMITED | 02349942 | 14/01/2008 | 08/10/2008 | Gold |
| SILICA AND MOULDING SANDS ASSOCIATION | 01407098 | 12/06/2008 | 01/10/2009 | Not Trading |
| TENDLEY QUARRIES LIMITED | 02036966 | 12/01/2011 | 06/09/2016 | Gold |
| WITHERLEY SERVICES LIMITED | 03633454 | 01/02/2012 | 06/09/2016 | Not Trading |