| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BOOTS AND COOTS UNITED KINGDOM LIMITED | 06936733 | 17/09/2010 | Dissolved |
| DRILL BITS AND SERVICES UNITED KINGDOM LTD | 09928787 | 23/12/2015 | Dissolved |
| GROVE - TK | 01129999 | 09/03/2009 | Strike Off |
| Gearhart (United Kingdom) | SC074679 | 28/04/2008 | Dissolved |
| HML TRUSTEES LIMITED | SC244164 | 02/10/2017 | Not Trading |
| SENSORTRAN (UK) LTD | 05892361 | 31/05/2011 | Dissolved |
| SPERRY DRILLING UNITED KINGDOM LTD | 09928460 | 23/12/2015 | Dissolved |
| TESEL HOLDINGS | 01383195 | 24/10/2007 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BAROID CORPORATION | 01640428 | 24/10/2007 | 18/11/2012 | Dissolved |
| BAROID LIMITED | 00843209 | 01/07/2009 | 31/12/2019 | Dissolved |
| BUE SHIPS LIMITED | 01525618 | 24/10/2007 | 18/11/2012 | Gold |
| DARCY TECHNOLOGIES HOLDINGS LIMITED | SC458727 | 20/12/2016 | 31/12/2019 | Dissolved |
| DARCY TECHNOLOGIES LIMITED | 07148795 | 20/12/2016 | 31/12/2019 | Dissolved |
| GROVE - TK | 01129999 | 24/10/2007 | 14/01/2008 | Strike Off |
| Gearhart (United Kingdom) | SC074679 | 24/10/2007 | 04/03/2008 | Dissolved |
| HALLIBURTON ENERGY SERVICES LIMITED | SC231879 | 24/10/2007 | 31/12/2019 | Dissolved |
| HALLIBURTON GLOBAL HOLDINGS LIMITED | 08794280 | 28/11/2013 | 31/12/2019 | Gold |
| HALLIBURTON HOLDINGS (NO. 3) | SC231927 | 24/10/2007 | 18/11/2012 | Dissolved |
| HALLIBURTON LANDMARK HOLDINGS UK LIMITED | 11436807 | 27/06/2018 | 31/12/2019 | Gold |
| HALLIBURTON LIMITED | 00978424 | 24/10/2007 | 31/12/2019 | Gold |
| HALLIBURTON MANAGEMENT LIMITED | SC232078 | 24/10/2007 | 18/11/2012 | Bronze |
| HALLIBURTON MANUFACTURING AND SERVICES LIMITED | 00611451 | 24/10/2007 | 05/11/2019 | Silver |
| INTELLIGENT WELL CONTROLS LIMITED | SC364115 | 25/10/2013 | 31/12/2019 | Dissolved |
| LANDMARK EAME, LTD. | 01937155 | 01/08/2011 | 31/12/2019 | Silver |
| MEDITERRANEAN ENERGY SERVICES LIMITED | SC232077 | 24/10/2007 | 18/11/2012 | Silver |
| NEFTEX PETROLEUM CONSULTANTS LIMITED | 04220557 | 12/06/2014 | 31/12/2019 | Gold |
| OSCR 60695 LIMITED | 03002262 | 24/10/2007 | 18/11/2012 | Dissolved |
| PETRIS TECHNOLOGY, LTD. | 05453198 | 28/01/2014 | 31/12/2019 | Dissolved |
| PETROLEUM ENGINEERING SERVICES LIMITED | SC050835 | 24/10/2007 | 18/11/2012 | Dissolved |
| PETROLEUM MANUFACTURING SERVICES LIMITED | SC111835 | 05/01/2009 | 31/12/2019 | Dissolved |
| PROTECH CENTREFORM INTERNATIONAL LIMITED | SC252217 | 05/06/2008 | 31/12/2019 | Gold |
| PSL ENERGY SERVICES HOLDINGS LIMITED | SC285264 | 24/10/2007 | 18/11/2012 | Dissolved |
| PSL ENERGY SERVICES LIMITED | SC243706 | 24/10/2007 | 31/12/2019 | Silver |
| RED SPIDER TECHNOLOGY LIMITED | SC249841 | 28/01/2014 | 31/12/2019 | Dissolved |
| ROCKWATER HOLDINGS LIMITED | 01535559 | 24/10/2007 | 18/11/2012 | Dissolved |
| ROCKWATER LIMITED | 01268625 | 24/10/2007 | 18/11/2012 | Dissolved |
| SMART FIBRES LIMITED | 03563533 | 14/12/2018 | 14/07/2021 | Dissolved |
| SUB SEA OFFSHORE (HOLDINGS) LIMITED | 01724943 | 24/10/2007 | 18/11/2012 | Dissolved |
| SUB SEA OFFSHORE LIMITED | 01385206 | 24/10/2007 | 18/11/2012 | Gold |
| TECHSOURCE RECRUITMENT LIMITED | SC276721 | 24/10/2007 | 18/11/2012 | Dissolved |
| WELLDYNAMICS INTERNATIONAL LIMITED | SC145181 | 05/01/2009 | 31/12/2019 | Silver |
| WLTD LIMITED | 00196631 | 24/10/2007 | 18/11/2012 | Dissolved |