| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Dmwsl 141 Ltd. | 02898560 | 04/02/1994 | Dissolved |
| GENERAL MINING UNION CORPORATION (UK) LIMITED | 00738594 | 18/11/2004 | Dissolved |
| KENMARE RESOURCES PUBLIC LIMITED COMPANY | FC031738 | 13/10/2016 | Silver |
| MEADOWSIDE TWICKENHAM LIMITED | 05816113 | 15/05/2006 | Gold |
| SABELGRADE LIMITED | 03332919 | 27/03/1997 | Bronze |
| TULLOW ANGOLA BV | FC032875 | 02/11/2015 | Dissolved |
| TULLOW LIBERIA BV | FC032874 | 02/11/2015 | Dissolved |
| TULLOW SIERRA LEONE BV | FC032872 | 02/11/2015 | Dissolved |
| UNITED OIL & GAS PLC | 09624969 | 19/02/2018 | Silver |
| UNITRUST HOLDINGS LIMITED | 02623193 | 18/11/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Coplex Colombia Ltd | 02190907 | 19/09/1995 | 15/10/1996 | Dissolved |
| ENERGY AFRICA UK LIMITED | 02592792 | 01/08/2006 | 18/09/2008 | Dissolved |
| ENERGY AFRICA UK LIMITED | 02592792 | 18/11/2004 | 11/01/2016 | Dissolved |
| ENI HEWETT LIMITED | SC090159 | 01/01/1998 | 29/08/2000 | Silver |
| ENI HEWETT LIMITED | SC090159 | 03/02/1997 | 28/11/2008 | Silver |
| ENQUEST ENERGY LIMITED | 01019698 | 18/11/2004 | 08/06/2005 | Not Trading |
| ENQUEST PRODUCTION LIMITED | 01019831 | 18/11/2004 | 08/06/2005 | Not Trading |
| GENERAL MINING UNION CORPORATION (UK) LIMITED | 00738594 | 01/08/2006 | 18/09/2008 | Dissolved |
| MEADOWSIDE FREEHOLD LIMITED | 05077905 | 19/05/2006 | 08/02/2007 | Not Trading |
| PLANET OIL INTERNATIONAL LIMITED | 03589112 | 10/01/2007 | 18/09/2008 | Dissolved |
| PLANET OIL INTERNATIONAL LIMITED | 03589112 | 10/01/2007 | 11/01/2016 | Dissolved |
| PLANET OIL LIMITED | 03460558 | 10/01/2007 | 18/09/2008 | Strike Off |
| PLANET OIL LIMITED | 03460558 | 10/01/2007 | 11/01/2016 | Strike Off |
| SPIRIT ENERGY NORTH SEA LIMITED | 04594558 | 10/06/2003 | 26/10/2004 | Silver |
| Seagull U K Ltd | 02774728 | 18/12/1995 | 01/02/1997 | Dissolved |
| THIRD ENERGY UK GAS LIMITED | 01421481 | 12/02/1999 | 16/02/2001 | One Red Flag |
| THIRD ENERGY UK GAS LIMITED | 01421481 | 12/02/1999 | 28/11/2003 | One Red Flag |
| TULLOW (EA) HOLDINGS LIMITED | FC032888 | 05/11/2015 | 11/01/2016 | Bronze |
| TULLOW CMS (NORTH SEA) LIMITED | 08593556 | 23/07/2013 | 11/01/2016 | Dissolved |
| TULLOW CONGO LIMITED | FC032827 | 15/10/2015 | 11/01/2016 | Dissolved |
| TULLOW COTE D'IVOIRE EXPLORATION LIMITED | FC032887 | 05/11/2015 | 11/01/2016 | Dissolved |
| TULLOW COTE D'IVOIRE LIMITED | FC032883 | 05/11/2015 | 11/01/2016 | One Red Flag |
| TULLOW DRC BV | FC032870 | 02/11/2015 | 11/01/2016 | Dissolved |
| TULLOW ENERGY LIMITED | 02051739 | 28/04/2000 | 18/09/2008 | Dissolved |
| TULLOW ENERGY LIMITED | 02051739 | 28/04/2000 | 11/01/2016 | Dissolved |
| TULLOW EQUATORIAL GUINEA LIMITED | FC032828 | 15/10/2015 | 11/01/2016 | Dissolved |
| TULLOW ETHIOPIA BV | FC032866 | 02/11/2015 | 11/01/2016 | Dissolved |
| TULLOW EXPLORATION & PRODUCTION UK LIMITED | SC359143 | 30/06/2011 | 11/01/2016 | Dissolved |
| TULLOW GABON HOLDINGS LIMITED | FC032829 | 15/10/2015 | 11/01/2016 | Bronze |
| TULLOW GABON LIMITED | FC032832 | 15/10/2015 | 11/01/2016 | Bronze |
| TULLOW GREENLAND EXPLORATION LIMITED | 07781896 | 01/11/2011 | 11/01/2016 | Dissolved |
| TULLOW GROUP SERVICES LIMITED | 05660209 | 26/01/2006 | 18/09/2008 | Amber |
| TULLOW GROUP SERVICES LIMITED | 05660209 | 26/01/2006 | 11/01/2016 | Amber |
| TULLOW GUINEA LIMITED | 08233451 | 02/11/2012 | 11/01/2016 | Dissolved |
| TULLOW GUYANA BV | FC032873 | 02/11/2015 | 11/01/2016 | Dissolved |
| TULLOW JAMAICA LIMITED | 09162755 | 24/09/2014 | 11/01/2016 | Dissolved |
| TULLOW KENYA BV | FC032867 | 02/11/2015 | 11/01/2016 | Bronze |
| TULLOW MADAGASCAR LIMITED | FC032885 | 05/11/2015 | 11/01/2016 | Dissolved |
| TULLOW MAURITANIA LIMITED | FC032830 | 15/10/2015 | 11/01/2016 | Amber |
| TULLOW MEXICO BV | FC032868 | 02/11/2015 | 11/01/2016 | Dissolved |
| TULLOW MOZAMBIQUE LIMITED | 07672804 | 27/09/2011 | 11/01/2016 | Amber |
| TULLOW NAMIBIA LIMITED | FC032826 | 15/10/2015 | 11/01/2016 | Bronze |
| TULLOW OIL (INTERNATIONAL) NORGE LIMITED | 08029991 | 21/01/2013 | 11/01/2016 | Dissolved |
| TULLOW OIL 100 LIMITED | 07086877 | 08/01/2010 | 11/01/2016 | Dissolved |
| TULLOW OIL 101 LIMITED | 07639401 | 14/06/2011 | 01/01/2016 | Dissolved |
| TULLOW OIL FINANCE LIMITED | 08107505 | 11/10/2012 | 11/01/2016 | Bronze |
| TULLOW OIL PLC | 03919249 | 04/03/2008 | 01/01/2016 | Silver |
| TULLOW OIL PLC | 03919249 | 27/04/2000 | 28/04/2016 | Silver |
| TULLOW OIL SK LIMITED | 05287330 | 13/12/2004 | 18/09/2008 | Amber |
| TULLOW OIL SK LIMITED | 05287330 | 13/12/2004 | 11/01/2016 | Amber |
| TULLOW OIL SNS LIMITED | 05064884 | 31/03/2008 | 18/09/2008 | Dissolved |
| TULLOW OIL SNS LIMITED | 05064884 | 12/03/2004 | 11/01/2016 | Dissolved |
| TULLOW OIL SPE LIMITED | 04609980 | 31/03/2008 | 18/09/2008 | Gold |
| TULLOW OIL SPE LIMITED | 04609980 | 04/03/2003 | 11/01/2016 | Gold |
| TULLOW OIL TS LIMITED | 07117038 | 27/01/2010 | 11/01/2016 | Dissolved |
| TULLOW SENEGAL LIMITED | FC032831 | 15/10/2015 | 11/01/2016 | Dissolved |
| TULLOW TANZANIA BV | FC032871 | 02/11/2015 | 11/01/2016 | Dissolved |
| TULLOW URUGUAY LIMITED | 08107466 | 17/07/2012 | 11/01/2016 | Gold |
| TULLOW ZAMBIA BV | FC032869 | 02/11/2015 | 11/01/2016 | Bronze |
| Turnsector Ltd | 02131346 | 19/09/1995 | 15/10/1996 | Dissolved |
| UNITRUST HOLDINGS LIMITED | 02623193 | 01/08/2006 | 18/09/2008 | Dissolved |