| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AMBER ACQUISITION LIMITED | SC656027 | 28/02/2020 | Dissolved |
| CLEARWELL ENERGY HOLDINGS LIMITED | SC562775 | 07/04/2017 | Amber |
| CLEARWELL ENERGY LIMITED | 07430686 | 09/05/2017 | Silver |
| FLUX OILFIELD TECHNOLOGY LTD | SC373887 | 01/03/2010 | Dissolved |
| FRONTROW ENERGY TECHNOLOGY GROUP LIMITED | SC549911 | 17/01/2017 | Amber |
| INTERVENTEK SUBSEA ENGINEERING LIMITED | SC468667 | 28/08/2015 | Bronze |
| PRAGMA WELL TECHNOLOGY LIMITED | SC533348 | 22/12/2017 | Amber |
| UNITY WELL INTEGRITY LIMITED | SC615249 | 22/02/2019 | Silver |
| WELL-SENSE TECHNOLOGY LIMITED | SC502698 | 26/06/2015 | Bronze |
| WELL-SENSE TECHNOLOGY UK LIMITED | SC623755 | 23/06/2020 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ENOVATE SYSTEMS LIMITED | SC223219 | 26/02/2013 | 26/06/2015 | Silver |
| PEAK WELL SYSTEMS LIMITED | SC337516 | 18/02/2014 | 29/12/2016 | One Red Flag |
| RUBISLAW INVESTMENTS UNLIMITED | SC239426 | 18/03/2014 | 29/12/2016 | Dissolved |
| UNITY WELL INTEGRITY UK LIMITED | SC273906 | 23/01/2017 | 22/02/2019 | Gold |
| ZILIFT HOLDINGS LIMITED | SC445696 | 21/03/2013 | 18/06/2020 | Bronze |
| ZILIFT LIMITED | SC360024 | 19/12/2013 | 18/06/2020 | One Red Flag |