| Company | Timeline | Status | |
| Protherm Engineering (Shenstone) Limited Director • Unreported | 30 Mar 2020←5 Years→Current | Active | |
| Protherm Engineering (Walsall) Limited Director • Unreported | 26 Nov 2015←9 Years→Current | Active | |
| Protherm Engineering Holdings Limited Director • Unreported | 27 Jun 2014←11 Years→Current | Active | |
