| Company | Timeline | Status | |
| Castle Air Group Limited Secretary • Unreported | 5 Dec 2008←3 Years→6 Jan 2012 | Active | |
| Castle Air Academy Limited Secretary • Unreported | 5 Dec 2008←3 Years→6 Jan 2012 | Active | |
| Bristow Southeast Asia Limited Secretary • Lawyer | 27 Oct 2008←3 Years→6 Jan 2012 | Active | |
| Bristow Aerial Solutions Limited Secretary • Lawyer | 27 Oct 2008←3 Years→6 Jan 2012 | Dissolved | |
| Avia Quest Limited Secretary • Lawyer | 27 Oct 2008←3 Years→6 Jan 2012 | Dissolved | |
| Sakhalin Bristow Air Services Limited Secretary • Lawyer | 27 Oct 2008←3 Years→6 Jan 2012 | Dissolved | |
| Bristow Aviation Holdings Limited Secretary • Lawyer | 27 Oct 2008←3 Years→6 Jan 2012 | Active | |
| Bristow Staff Pension Scheme Trustees Limited Secretary • Lawyer | 27 Oct 2008←3 Years→6 Jan 2012 | Active | |
| Bristow Helicopter Group Limited Secretary • Lawyer | 27 Oct 2008←3 Years→6 Jan 2012 | Active | |
| Caledonian Helicopters Limited Secretary • Lawyer | 27 Oct 2008←3 Years→6 Jan 2012 | Active | |
