| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CONDUCTOR INSTALLATION SERVICES LIMITED | 05363901 | 15/04/2005 | Dissolved |
| CORE GROUTING SERVICES LIMITED | 08430149 | 05/03/2013 | Dissolved |
| LM HANDLING LTD | 06535466 | 22/08/2008 | Dissolved |
| Stewart Trident Offshore Ltd | SC154869 | 05/07/2006 | Dissolved |
| TRIDENT OFFSHORE CASPIAN LIMITED | SC097902 | 05/07/2006 | Dissolved |
| TRIDENT SUBSEA LIMITED | SC185064 | 05/07/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ACTEON GROUP OPERATIONS (UK) LIMITED | 15426649 | 19/01/2024 | 21/03/2024 | Amber |
| ACTEON INTEGRATED SOLUTIONS LIMITED | 09986214 | 03/02/2016 | 30/05/2024 | One Red Flag |
| AQUATIC ENGINEERING & CONSTRUCTION LIMITED | SC123734 | 04/07/2006 | 30/05/2024 | Bronze |
| BRUCE ANCHOR LIMITED | SC549599 | 03/07/2017 | 01/05/2024 | One Red Flag |
| CHAIN CORPORATION INTERNATIONAL LIMITED | SC193624 | 06/07/2007 | 30/06/2009 | Dissolved |
| CLAXTON ENGINEERING SERVICES LIMITED | 01927530 | 27/02/2008 | 30/05/2024 | Bronze |
| DEEPWATER EU LTD | 03757813 | 23/12/2019 | 05/06/2024 | One Red Flag |
| EURWA SURVEY LIMITED | SC374627 | 22/01/2015 | 01/05/2024 | Amber |
| GEOSCAN GROUP LIMITED | SC167153 | 06/07/2007 | 30/05/2024 | Gold |
| INTERACT ACTIVITY MANAGEMENT LIMITED | 06413641 | 06/05/2008 | 19/06/2014 | Dissolved |
| INTERMOOR LIMITED | SC167870 | 06/07/2007 | 30/05/2024 | Bronze |
| INTERMOOR MARINE SERVICES LIMITED | SC100128 | 05/07/2006 | 14/12/2016 | Dissolved |
| J2 SUBSEA LTD | SC344830 | 10/07/2013 | 01/05/2024 | Gold |
| LARGE DIAMETER DRILLING LIMITED | 06320039 | 23/07/2007 | 30/05/2024 | One Red Flag |
| MIRAGE MACHINES LIMITED | 02788205 | 27/02/2008 | 01/12/2017 | Dissolved |
| PROBE MANUFACTURING AND FABRICATION LIMITED | 01168238 | 05/09/2013 | 29/05/2024 | Bronze |
| RENT I.T. (SCOTLAND) LIMITED | SC188499 | 06/07/2007 | 30/06/2009 | Dissolved |
| SEASCAN LIMITED | SC197038 | 06/07/2007 | 01/05/2024 | Silver |
| SEATRONICS (1999) LIMITED | 02712220 | 06/07/2007 | 30/06/2009 | Dissolved |
| SEATRONICS LIMITED | SC124658 | 06/07/2007 | 01/05/2024 | Gold |
| Trident Surveys Ltd | SC162009 | 05/07/2006 | 30/06/2009 | Dissolved |
| U.W.G. LIMITED | 02369087 | 27/02/2008 | 10/05/2021 | Bronze |
| UTEC INTERNATIONAL LIMITED | SC294581 | 27/03/2017 | 01/05/2024 | Bronze |
| UTEC NCS SURVEY LIMITED | SC282769 | 25/05/2011 | 01/05/2024 | One Red Flag |
| UTEC STAR NET GEOMATICS LIMITED | SC210964 | 22/01/2015 | 30/09/2020 | Dissolved |
| UTEC SURVEY CONSTRUCTION SERVICES LIMITED | SC355518 | 22/01/2015 | 27/03/2017 | Dissolved |
| UTEC SURVEY WEST AFRICA LIMITED | 10174817 | 11/05/2016 | 05/06/2024 | One Red Flag |
| VIKING SEATECH LIMITED | SC150861 | 08/12/2017 | 17/04/2018 | Dissolved |