| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| J. RAY MCDERMOTT UK LTD | 05937406 | 18/09/2006 | Dissolved |
| J. Ray McDermott International Services Ltd | 01432856 | 31/10/2001 | Dissolved |
| MACSHELF LTD | 02652842 | 31/01/2001 | Dissolved |
| MCDERMOTT HOLDINGS (U.K.) LIMITED | 02576807 | 05/05/1998 | Bronze |
| MCDERMOTT MARINE CONSTRUCTION LIMITED | 02869047 | 01/09/1996 | One Red Flag |
| McDermott Marine U K Ltd | 02186518 | 31/10/2001 | Dissolved |
| McDermott Submarine Cable Ltd | 03084277 | 08/03/1996 | Dissolved |
| McDermott Submarine Cable Systems Ltd | 03135382 | 15/04/1996 | Dissolved |
| Mentor Engineering Consultants Ltd | 02151688 | 31/10/2001 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ACERGY SERVICES LIMITED | 01902584 | 01/08/1996 | 03/04/1998 | Dissolved |
| BWXT TECHNICAL SERVICES (U.K.) LIMITED | 06032437 | 18/01/2007 | 02/07/2010 | Dissolved |