| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BLACK ISLE INDUSTRIAL PROPERTY COMPANY LIMITED | SC086724 | 31/12/1988 | Dissolved |
| BLACK ISLE PROPERTY COMPANY LIMITED | SC060828 | 31/12/1988 | Silver |
| European Leisure Network Plc | SC105719 | 03/02/1989 | Dissolved |
| HIGHCRAG LIMITED | SC141347 | 19/11/1992 | Dissolved |
| MILLBRY 72 LTD. | SC186570 | 16/07/1998 | Bronze |
| The Haser Company Ltd | SC105544 | 21/04/1990 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AQUAMARINE POWER LIMITED | SC327622 | 28/04/2014 | 17/12/2015 | Dissolved |
| Business Information Source Ltd | SC138245 | 05/12/1994 | 09/05/1995 | Dissolved |
| FUSION SCOTLAND | SC235210 | 22/01/2003 | 02/08/2004 | Dissolved |
| GREAT GLEN WATER PARK COMPANY LIMITED | SC109880 | 30/09/1989 | 26/10/1990 | Silver |
| MARINE POWER PROJECTS LIMITED | SC278464 | 14/01/2005 | 24/11/2009 | Dissolved |
| VOITH HYDRO WAVEGEN LIMITED | SC124670 | 01/06/1990 | 19/08/2004 | Dissolved |
| VOITH HYDRO WAVEGEN PROJECTS LIMITED | SC166778 | 13/08/1996 | 29/04/2004 | Dissolved |