| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ASCO (DC1) LIMITED | SC052495 | 27/02/2013 | Dissolved |
| ASCO AVIATION LIMITED | SC404605 | 27/02/2013 | Dissolved |
| ASCO DEVELOPMENTS LIMITED | SC137921 | 27/02/2013 | Dissolved |
| BP INV3 HOLDCO LTD | 10705035 | 14/05/2024 | Gold |
| BURGESS & GARRICK OIL SERVICES LIMITED | SC082289 | 31/07/2019 | Dissolved |
| CSM HOLDINGS UK LIMITED | SC297325 | 07/08/2013 | Dissolved |
| KCA DEUTAG DRILLING OFFSHORE SERVICES AS | FC030105 | 11/03/2011 | Bronze |
| KCA DEUTAG INVESTMENTS LIMITED | FC029380 | 13/01/2010 | Bronze |
| KCA DEUTAG PTE LIMITED | FC029957 | 07/01/2011 | Bronze |
| Kca Deutag Drilling Land Support Ltd | SC253225 | 06/02/2006 | Dissolved |
| OILBASE MANAGEMENT LIMITED | SC136843 | 27/02/2013 | Dissolved |
| SCRABSTER PORT SERVICES LIMITED | SC172882 | 27/02/2013 | Dissolved |
| TOTAL WASTE MANAGEMENT ALLIANCE LIMITED | SC203064 | 31/07/2019 | Amber |
| TOTAL WASTE MANAGEMENT INTERNATIONAL LTD. | SC212585 | 31/07/2019 | Amber |
| TWMA GROUP LIMITED | SC205718 | 31/07/2019 | One Red Flag |
| TWMA KUWAIT LIMITED | 11211164 | 31/07/2019 | Dissolved |
| TWMA MIDDLE EAST LIMITED | SC067091 | 31/07/2019 | Silver |
| VENTURE FREIGHT MANAGEMENT LIMITED | SC204814 | 27/02/2013 | Dissolved |
| WOODACON OILS LIMITED | SC045518 | 27/02/2013 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABBOT GROUP LIMITED | 00623285 | 03/05/2011 | 31/01/2013 | Bronze |
| ABBOT INVESTMENTS (NORTH AFRICA) LIMITED | 05246036 | 28/04/2008 | 31/01/2013 | One Red Flag |
| ALBYN DRILLING SERVICES LIMITED | SC118702 | 30/04/2009 | 31/01/2013 | Dissolved |
| ASCO (DC2) LIMITED | 05898050 | 27/02/2013 | 01/05/2019 | One Red Flag |
| ASCO (DC3) LIMITED | 05916071 | 27/02/2013 | 01/05/2019 | One Red Flag |
| ASCO (DC4) LIMITED | 05898058 | 27/02/2013 | 01/05/2019 | One Red Flag |
| ASCO DECOMMISSIONING LIMITED | SC180242 | 27/02/2013 | 01/05/2019 | Amber |
| ASCO FREIGHT MANAGEMENT LIMITED | SC202171 | 27/02/2013 | 01/05/2019 | Amber |
| ASCO HOLDINGS LIMITED | SC300658 | 27/02/2013 | 01/05/2019 | Bronze |
| ASCO JV HOLDINGS LIMITED | SC346041 | 27/02/2013 | 01/05/2019 | Amber |
| ASCO MARINE LIMITED | SC316087 | 27/02/2013 | 01/05/2019 | Amber |
| ASCO PROPERTIES LIMITED | SC300657 | 27/02/2013 | 01/05/2019 | Bronze |
| ASCO UK LIMITED | SC029934 | 27/02/2013 | 01/05/2019 | Gold |
| ASCO VENTURES LIMITED | SC549855 | 10/11/2016 | 01/05/2019 | Amber |
| DEUTAG LIMITED | 02161895 | 30/04/2009 | 31/01/2013 | Dissolved |
| DEUTAG RESOURCE MANAGEMENT LIMITED | SC110503 | 30/04/2009 | 31/01/2013 | Dissolved |
| DEUTAG UK LIMITED | 02279453 | 30/04/2009 | 31/01/2013 | Dissolved |
| ENVIROCO LIMITED | 11226610 | 17/04/2018 | 01/05/2019 | Not Trading |
| KCA DEUTAG (LAND RIG) LIMITED | 05659113 | 24/05/2011 | 31/01/2013 | One Red Flag |
| KCA DEUTAG CASPIAN LIMITED | 01877963 | 30/04/2009 | 31/01/2013 | Amber |
| KCA DEUTAG DRILLING GROUP LIMITED | 01059871 | 19/12/2005 | 31/01/2013 | One Red Flag |
| KCA DEUTAG DRILLING LIMITED | SC031961 | 23/10/2001 | 31/01/2013 | Silver |
| KCA DEUTAG DRILLING RIGS I LIMITED | SC426092 | 13/06/2012 | 31/01/2013 | Dissolved |
| KCA DEUTAG DRILLING SERVICES (UK) LIMITED | SC234542 | 06/02/2006 | 31/01/2013 | Insolvent |
| KCA DEUTAG ENTERPRISES LIMITED | 06715023 | 09/07/2012 | 31/01/2013 | One Red Flag |
| KCA DEUTAG EUROPE B.V. | SF000965 | 25/05/2009 | 31/01/2013 | Bronze |
| KCA DEUTAG FINANCE I LIMITED | SC423214 | 02/05/2012 | 31/01/2013 | Dissolved |
| KCA DEUTAG FINANCE II LIMITED | SC425933 | 11/06/2012 | 31/01/2013 | Dissolved |
| KCA DEUTAG LIMITED | SC349488 | 03/10/2008 | 31/01/2013 | One Red Flag |
| KCA DEUTAG RIG DESIGN SERVICES LIMITED | SC421351 | 05/04/2012 | 31/01/2013 | Amber |
| KCA DEUTAG TECHNICAL SUPPORT LIMITED | SC219425 | 16/11/2001 | 31/01/2013 | Amber |
| KCA DRILLING UK LIMITED | SC125584 | 30/04/2009 | 31/01/2013 | Dissolved |
| KCA EUROPE LIMITED | 01189464 | 30/04/2009 | 31/01/2013 | Dissolved |
| KCA EUROPEAN HOLDINGS LIMITED | 04286946 | 30/04/2009 | 31/01/2013 | Silver |
| NORTH SEA LIFTING LIMITED | SC117356 | 27/02/2013 | 01/05/2019 | Amber |
| OBM LIMITED | SC391970 | 27/02/2013 | 01/05/2019 | Amber |
| ONIQUA EUROPE LIMITED | SC449016 | 01/05/2013 | 11/10/2018 | Not Trading |
| RDS ENERGY SOLUTIONS LIMITED | 02479484 | 31/08/2009 | 31/01/2013 | Amber |
| RIG DESIGN SERVICES HOLDINGS LIMITED | 04286931 | 18/01/2010 | 31/01/2013 | Amber |
| SANDPIPER DRILLING LIMITED | 01345950 | 30/04/2009 | 31/01/2013 | Dissolved |
| SELETAR SHIPPING LIMITED | SC348161 | 27/02/2013 | 01/05/2019 | Amber |
| SET DRILLING COMPANY LIMITED | SC167498 | 30/04/2008 | 31/01/2013 | One Red Flag |