| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Astab (Europe) Ltd | 02709215 | 18/04/2000 | Dissolved |
| Astab Ltd | 02695158 | 18/04/2000 | Dissolved |
| Britomya Ltd | 01602339 | 18/04/2000 | Dissolved |
| C + G Ltd | 02709223 | 18/04/2000 | Dissolved |
| CHEVIOT SUSTAINABLE DEVELOPMENT LTD | 07000205 | 25/08/2009 | Dissolved |
| Calmote Ltd | 02575504 | 18/04/2000 | Dissolved |
| Omya C + G Ltd | 01738416 | 18/04/2000 | Dissolved |
| Plastichem Limited | 00965622 | 18/04/2000 | Dissolved |
| Red Square Ltd | 02325512 | 18/04/2000 | Dissolved |
| Snowcal Ltd | 02754555 | 18/04/2000 | Dissolved |
| White Pigments Ltd | 02585773 | 18/04/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AGLIME LIMITED | 02585227 | 18/04/2000 | 19/09/2008 | Dissolved |
| CROXTON + GARRY LIMITED | 02584459 | 18/04/2000 | 19/09/2008 | Dissolved |
| DERBYSHIRE STONE LIMITED | 02584140 | 18/04/2000 | 19/09/2008 | Dissolved |
| EGLINTON LIMESTONE COMPANY LIMITED | SC004460 | 18/04/2000 | 19/09/2008 | Dissolved |
| HUNTERCHEM LIMITED | 01256182 | 18/04/2000 | 19/09/2008 | Dissolved |
| LAMINOX LIMITED | 02263147 | 18/04/2000 | 19/09/2008 | Dissolved |
| NORTALC MILLING LIMITED | 01917830 | 18/04/2000 | 19/09/2008 | Dissolved |
| NORWEGIAN TALC LIMITED | 00830284 | 18/04/2000 | 19/09/2008 | Dissolved |
| OMYA LIMITED | 01602362 | 18/04/2000 | 01/10/2008 | Dissolved |
| OMYA UK LIMITED | 00436591 | 01/01/1995 | 19/09/2008 | Amber |
| PLUSS-STAUFER LIMITED | 03138417 | 13/09/2000 | 19/09/2008 | Bronze |
| PROTEXULATE LIMITED | 00657035 | 18/04/2000 | 19/09/2008 | Dissolved |
| SCOPEFARE LIMITED | 03752643 | 31/03/2004 | 19/09/2008 | Dissolved |