| Company | Timeline | Status | |
| G.I. Young & Company Limited Director • Co. Director | 31 Jan 1991←34 Years→Current | Active | |
| George Ingram (Glasgow) Limited Director • Director | 31 Dec 1988←36 Years→Current | Active | |
| Mathison, Palmer & Company Limited Director • Director | 31 Dec 1988←36 Years→Current | Active | |
| Ingram Brothers Ltd Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Milroy Chemical Company Limited (The) Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
