| Company | Timeline | Status | |
| Boak Bros. (Insulation) Limited Secretary • Unreported | 31 Mar 1990←35 Years→Current | Active | |
| Lagwell Insulation Company Limited Secretary • Unreported | 31 Dec 1988←5 Years→14 Mar 1994 | Active | |
| Dundee Boiler Covering Company Limited Secretary • Unreported | 21 Dec 1988←34 Years→28 Mar 2023 | Dissolved | |
