| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Atlas Bookfairs Ltd | 02622137 | 19/06/1991 | Dissolved |
| Atlas Exhibitions International Ltd | 02621985 | 19/06/1991 | Dissolved |
| Book Show Limited | 02528554 | 07/08/1992 | Dissolved |
| INTERNATIONAL SCHOOL PUBLICATIONS LIMITED | 08661512 | 22/08/2013 | One Red Flag |
| ISC CONSULTANCY LTD | 07550986 | 03/03/2011 | Dissolved |
| ISC RESEARCH LTD | 05160590 | 23/06/2004 | Amber |
| ISC WORLDWIDE LTD | 06319844 | 23/07/2007 | Dissolved |
| THE INTERNATIONAL SCHOOL CONSULTANCY GROUP LTD | 08660485 | 22/08/2013 | One Red Flag |
| The At Work Publishing Company Limited | 02431896 | 12/10/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| International Schools' Purchasing Organisation Ltd | 04029282 | 07/07/2000 | 24/11/2003 | Dissolved |
| RISK-AVERSE INVESTING LIMITED | 06402290 | 18/10/2007 | 06/11/2012 | Dissolved |