| Company | Timeline | Status | |
| Sentinel Offshore Vessels 54 Limited Director • Mathematician | 1 Feb 2016←3 Months→1 May 2016 | Active | |
| Sentinel Marine Falkland Islands Limited Director • Mathematician | 1 Feb 2016←3 Months→1 May 2016 | Active | |
Sentinel Ranger Limited Director • Mathematician | 1 Feb 2016←3 Months→1 May 2016 | Dissolved | |
| Sentinel Offshore Vessels 3 Limited Director • Mathematician | 1 Feb 2016←3 Months→1 May 2016 | Dissolved | |
| Sentinel Offshore Vessels 2 Limited Director • Mathematician | 1 Feb 2016←3 Months→1 May 2016 | Active | |
| Sentinel Offshore Holdings Limited Director • Mathematician | 1 Feb 2016←3 Months→1 May 2016 | Active | |
| Sentinel Crewing Limited Director • Mathematician | 1 Feb 2016←3 Months→1 May 2016 | Active | |
| Sentinel Offshore Vessels Limited Director • Mathematician | 1 Feb 2016←3 Months→1 May 2016 | Active | |
| Cyan Sentinel Limited Director • Unreported | 1 Feb 2016←3 Months→1 May 2016 | Active | |
