| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Acrid Ltd | 02365314 | 30/04/1991 | Dissolved |
| ELVER LIMITED | SC036054 | 06/07/1989 | Dissolved |
| ELVER LIMITED | SC036054 | 17/02/1995 | Dissolved |
| ELVINGSTON SCIENCE CENTRE LIMITED | SC120486 | 02/08/1992 | Dissolved |
| ELVINGSTON SCIENCE CENTRE LIMITED | SC120486 | 02/08/1992 | Dissolved |
| Electronic Book Factory Ltd (The) | SC121460 | 21/11/1991 | Dissolved |
| Electronic Book Factory Ltd (The) | SC121460 | 27/11/1990 | Dissolved |
| Enviroscot North America Ltd | SC255703 | 09/09/2003 | Dissolved |
| Enviroscot North America Ltd | SC255703 | 09/09/2003 | Dissolved |
| Falcon Typographic Art Ltd | SC120246 | 18/09/1990 | Dissolved |
| Light Technology Ltd | SC146174 | 07/09/1994 | Dissolved |
| Light Technology Ltd | SC146174 | 07/09/1994 | Dissolved |
| M-EVOLUTION LIMITED | SC476310 | 28/04/2014 | Dissolved |
| Oceanplease Ltd | SC188009 | 06/08/1998 | Dissolved |
| SIMPSON RESEARCH LIMITED | 00839088 | 30/04/2019 | Not Trading |
| Simpson Research Investment Syndicate Ltd | SC274807 | 15/10/2004 | Dissolved |
| Simpson Research Investment Syndicate Ltd | SC274807 | 15/10/2004 | Dissolved |
| The Electronic Book Factory Ltd | SC166226 | 12/06/1996 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| EDINBURGH COLLEGE DEVELOPMENT TRUST | SC469307 | 13/02/2014 | 26/02/2015 | Silver |
| ELVINGSTON FARM PRODUCE LTD. | SC205000 | 10/05/2000 | 26/06/2008 | Dissolved |
| ELVINGSTON FARM PRODUCE LTD. | SC205000 | 10/05/2000 | 26/06/2008 | Dissolved |
| ENVIRONCOM ENGLAND LIMITED | 04980148 | 01/12/2003 | 31/10/2004 | Bronze |
| ENVIRONCOM LIMITED | SC242647 | 27/01/2003 | 31/10/2004 | Bronze |
| Freelight Systems Ltd | SC191021 | 01/10/2004 | 13/09/2007 | Dissolved |
| I-Dare Innovation Ltd | SC220013 | 10/09/2003 | 20/02/2006 | Dissolved |
| Methode Fibre Optics - Europe Ltd | 02780622 | 26/03/1993 | 30/04/1993 | Dissolved |
| SIMPSON RESEARCH LIMITED | 00839088 | 31/12/1990 | 08/09/2017 | Not Trading |
| SIMPSON RESEARCH LIMITED | 00839088 | 17/02/1995 | 08/09/2017 | Not Trading |
| Splits Technologies Ltd | SC184007 | 08/04/1998 | 23/11/1998 | Dissolved |
| Stanley Laboratories Ltd | 00967796 | 24/12/1991 | 11/01/1995 | Dissolved |
| THE COMPASS SCHOOL | SC139349 | 15/07/1992 | 30/11/1994 | Silver |