| Company | Timeline | Status | |
| Promanex Group Holdings Limited Director • Solicitor | 31 Mar 2020←5 Months→1 Sep 2020 | Dissolved | |
| Promanex Group Limited Director • Solicitor | 31 Mar 2020←5 Months→1 Sep 2020 | Dissolved | |
| Promanex (Construction & Maintenance Services) Limited Director • Solicitor | 31 Mar 2020←5 Months→1 Sep 2020 | Dissolved | |
| Promanex (Total FM & Environmental Services) Limited Director • Solicitor | 31 Mar 2020←5 Months→1 Sep 2020 | Dissolved | |
| Promanex (Civils & Industrial Services) Limited Director • Solicitor | 31 Mar 2020←5 Months→1 Sep 2020 | Dissolved | |
| Costain Oil, Gas & Process Limited Director • Solicitor | 31 Mar 2020←5 Months→1 Sep 2020 | Active | |
| Costain Alcaidesa Limited Director • Solicitor | 28 Nov 2019←9 Months→1 Sep 2020 | Dissolved | |
| Costain Oil, Gas & Process (Overseas) Limited Director • Solicitor | 7 May 2019←1 Year 3 Months→1 Sep 2020 | Active | |
| Costain Construction Limited Director • Unreported | 7 May 2019←1 Year 3 Months→1 Sep 2020 | Dissolved | |
| Westminster Plant Co. Limited Director • Solicitor | 7 May 2019←1 Year 3 Months→1 Sep 2020 | Dissolved | |
