| Company | Timeline | Status | |
| Harbour Energy Finance (2) Plc Secretary • Unreported | 21 Jul 2025←5 Months→Current | Active | |
| Harbour Energy Production Limited Secretary • Unreported | 25 Aug 2023←2 Years 4 Months→Current | Active | |
| Harbour Energy Argentina Limited Secretary • Unreported | 1 Jun 2023←2 Years 7 Months→Current | Active | |
| Viking CCS Limited Secretary • Unreported | 10 Oct 2022←3 Years→Current | Active | |
| Harbour Energy Marketing Limited Secretary • Unreported | 10 Oct 2022←3 Years→Current | Active | |
| Harbour Energy Services Limited Secretary • Unreported | 10 Oct 2022←3 Years→Current | Active | |
| Chrysaor E&P Limited Secretary • Unreported | 10 Oct 2022←3 Years→Current | Active | |
| Harbour Energy Finance Limited Secretary • Unreported | 10 Oct 2022←3 Years→Current | Active | |
| Chrysaor (U.K.) Delta Limited Secretary • Unreported | 10 Oct 2022←2 Years 4 Months→27 Feb 2025 | Dissolved | |
| Chrysaor (U.K.) Sigma Limited Secretary • Unreported | 10 Oct 2022←3 Years→Current | Active | |
