| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| American Technical Publishers Ltd | 01521874 | 31/03/2005 | Dissolved |
| Construction Research Communications Ltd | 02927016 | 01/06/2006 | Dissolved |
| Ihs (Uk) Ltd | 05887506 | 26/07/2006 | Dissolved |
| Poole Software International Ltd | 02160394 | 30/04/2003 | Dissolved |
| Technical Indexes Ltd | 05887598 | 26/07/2006 | Dissolved |
| Wessex Electronic Publishing Ltd | 01694524 | 17/04/2003 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ESDU HOLDINGS LIMITED | 01004791 | 01/12/1997 | 01/09/1998 | Dissolved |
| ESDU INTERNATIONAL LIMITED | 02244330 | 27/03/2003 | 18/10/2010 | Dissolved |
| Electronic Engineering Index Ltd | 00829632 | 17/09/1998 | 31/03/2002 | Dissolved |
| Engineering Sciences Data Unit Ltd | 01002340 | 01/12/1997 | 01/09/1998 | Dissolved |
| IHS GLOBAL LIMITED | 00788737 | 17/04/2003 | 18/10/2010 | Gold |
| IHS GROUP HOLDINGS LIMITED | 01601208 | 23/05/2006 | 18/10/2010 | Gold |
| Tech Intext Limited | 02158978 | 21/08/1998 | 31/03/2002 | Dissolved |