| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ALBYN DRILLING SERVICES LIMITED | SC118702 | 15/01/2013 | Dissolved |
| DEUTAG LIMITED | 02161895 | 15/01/2013 | Dissolved |
| DEUTAG RESOURCE MANAGEMENT LIMITED | SC110503 | 15/01/2013 | Dissolved |
| DEUTAG UK LIMITED | 02279453 | 15/01/2013 | Dissolved |
| KCA DEUTAG EUROPE B.V. | SF000965 | 15/01/2013 | Bronze |
| KCA DRILLING UK LIMITED | SC125584 | 15/01/2013 | Dissolved |
| KCA EUROPE LIMITED | 01189464 | 15/01/2013 | Dissolved |
| SANDPIPER DRILLING LIMITED | 01345950 | 15/01/2013 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABBOT GROUP LIMITED | 00623285 | 07/04/2014 | 02/03/2020 | Silver |
| ABBOT HOLDINGS LIMITED | 02682916 | 15/01/2013 | 02/03/2020 | Silver |
| ABBOT INVESTMENTS (NORTH AFRICA) LIMITED | 05246036 | 15/01/2013 | 02/03/2020 | One Red Flag |
| ABBOT KEYSTONE LIMITED | SC476148 | 25/04/2014 | 02/03/2020 | Dissolved |
| ASCO (DC2) LIMITED | 05898050 | 20/03/2020 | 30/06/2023 | Dissolved |
| ASCO (DC3) LIMITED | 05916071 | 20/03/2020 | 30/06/2023 | Dissolved |
| ASCO (DC4) LIMITED | 05898058 | 20/03/2020 | 30/06/2023 | One Red Flag |
| ASCO DECOMMISSIONING LIMITED | SC180242 | 20/03/2020 | 30/06/2023 | Amber |
| ASCO FREIGHT MANAGEMENT LIMITED | SC202171 | 20/03/2020 | 30/06/2023 | Amber |
| ASCO HOLDINGS LIMITED | SC300658 | 20/03/2020 | 30/06/2023 | One Red Flag |
| ASCO JV HOLDINGS LIMITED | SC346041 | 20/03/2020 | 30/06/2023 | One Red Flag |
| ASCO MARINE LIMITED | SC316087 | 20/03/2020 | 30/06/2023 | Amber |
| ASCO PROPERTIES LIMITED | SC300657 | 20/03/2020 | 30/06/2023 | Bronze |
| ASCO UK LIMITED | SC029934 | 20/03/2020 | 30/06/2023 | Gold |
| ASCO VENTURES LIMITED | SC549855 | 20/03/2020 | 30/06/2023 | Amber |
| ENVIROCO LIMITED | 11226610 | 20/03/2020 | 30/06/2023 | Not Trading |
| KCA DEUTAG (LAND RIG) LIMITED | 05659113 | 15/01/2013 | 02/03/2020 | One Red Flag |
| KCA DEUTAG CASPIAN LIMITED | 01877963 | 22/04/2014 | 02/03/2020 | Silver |
| KCA DEUTAG DRILLING GROUP LIMITED | 01059871 | 22/04/2014 | 02/03/2020 | One Red Flag |
| KCA DEUTAG DRILLING LIMITED | SC031961 | 22/04/2014 | 02/03/2020 | Silver |
| KCA DEUTAG DRILLING RIGS I LIMITED | SC426092 | 15/01/2013 | 02/03/2020 | Dissolved |
| KCA DEUTAG DRILLING SERVICES (UK) LIMITED | SC234542 | 15/01/2013 | 02/03/2020 | Insolvent |
| KCA DEUTAG ENTERPRISES LIMITED | 06715023 | 15/01/2013 | 02/03/2020 | One Red Flag |
| KCA DEUTAG FINANCE I LIMITED | SC423214 | 22/04/2014 | 02/03/2020 | Dissolved |
| KCA DEUTAG FINANCE II LIMITED | SC425933 | 22/04/2014 | 02/03/2020 | Dissolved |
| KCA DEUTAG LIMITED | SC349488 | 15/01/2013 | 02/03/2020 | One Red Flag |
| KCA DEUTAG RIG CO. LIMITED | 09923894 | 21/12/2015 | 02/03/2020 | Strike Off |
| KCA DEUTAG RIG DESIGN SERVICES LIMITED | SC421351 | 15/01/2013 | 02/03/2020 | Amber |
| KCA DEUTAG TECHNICAL SUPPORT LIMITED | SC219425 | 22/04/2014 | 02/03/2020 | Amber |
| KCA DEUTAG UK FINANCE PLC | 09015065 | 28/04/2014 | 02/03/2020 | Bronze |
| KCA EUROPEAN HOLDINGS LIMITED | 04286946 | 15/01/2013 | 02/03/2020 | Bronze |
| LAND RIG VENTURES I LIMITED | 10900533 | 04/08/2017 | 02/03/2020 | Dissolved |
| LAND RIG VENTURES II LIMITED | 10901307 | 04/08/2017 | 02/03/2020 | Dissolved |
| NORTH SEA LIFTING LIMITED | SC117356 | 20/03/2020 | 30/06/2023 | Amber |
| OBM LIMITED | SC391970 | 20/03/2020 | 30/06/2023 | Amber |
| RDS ENERGY SOLUTIONS LIMITED | 02479484 | 15/01/2013 | 02/03/2020 | Strike Off |
| RIG DESIGN SERVICES HOLDINGS LIMITED | 04286931 | 15/01/2013 | 02/03/2020 | Silver |
| SELETAR SHIPPING LIMITED | SC348161 | 20/03/2020 | 30/06/2023 | Amber |
| SET DRILLING COMPANY LIMITED | SC167498 | 15/01/2013 | 02/03/2020 | One Red Flag |