| Company | Timeline | Status | |
| Braehead Property Company Limited Director • Director | 19 May 1989←29 Years→10 May 2019 | Active | |
| Robertson Metals Recycling Limited Director • Director | 6 Mar 1989←20 Years→1 Jul 2009 | Active | |
R.M. Supplies (Inverkeithing) Limited Director • Director | 6 Mar 1989←20 Years→6 Aug 2009 | Dissolved | |
| Muir (Metal And Haulage Holdings) Limited Director • Company Director | 11 May 1988←31 Years→10 May 2019 | Active | |
| Thomas Muir (Haulage) Limited Director • Company Director | 11 May 1988←31 Years→10 May 2019 | Active | |
| Thomas Muir (Metals) Limited Director • Company Director | 11 May 1988←31 Years→10 May 2019 | Active | |
| Thomas Muir (Waste Management) Limited Director • Company Director | 18 Apr 1988←31 Years→10 May 2019 | Active | |
