| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| IUPAP UK | 07164880 | 29/01/2015 | Dissolved |
| Ioppw Ltd | 04863665 | 23/01/2004 | Dissolved |
| NORLAND COLLEGE LIMITED | 00193170 | 30/06/2015 | Silver |
| Optics. Org Ltd | 03602847 | 21/01/2000 | Dissolved |
| SAMBEX CONSULTANCY SERVICES LTD | 11221806 | 23/02/2018 | Dissolved |
| THE NORLAND FOUNDATION | 11077904 | 09/09/2019 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| IOP EDUCATIONAL PUBLISHING LIMITED | 04229315 | 03/09/2001 | 05/01/2016 | Not Trading |
| IOP ENTERPRISES LIMITED | 03471563 | 18/04/2013 | 31/12/2017 | Not Trading |
| IOP PUBLISHING LIMITED | 00467514 | 23/11/2001 | 01/01/2016 | Amber |
| TURPION LIMITED | 02463452 | 08/03/2004 | 24/05/2013 | One Red Flag |