Glenboig Union Fireclay Company
Dates
| / /1882 | Cumbernauld Fireclay Works and Mine Taken over by Glenboig Union Fireclay Company. |
| / /1882 | Glenboig Union Fireclay Company Formed by merger of the Glenboig Fireclay Company and James Dunnachies Star Fireclay Works. |
| / /1884 | Palacerigg Mine Opened by Glenboig Union Fireclay Company. |
| / /1890 | Gartcosh Fireclay Works Opened by Glenboig Union Fireclay Company. |
| / /1919 | Castlecary Fireclay Co Ltd Taken over by Glenboig Union Fireclay Company. |
| / /1919 | Faskine and Palacerigg Bricks and Coal Ltd Taken over by Glenboig Union Fireclay Company. |
| / /1919 | Bonnymuir and Dykehead Works Taken over by Glenboig Union Fireclay Company from George Turnball. |
| / /1936 | Glenboig Union Fireclay Company Taken over by General Refractories Ltd, Sheffield. |
