| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Automotive Business College Ltd | 04072497 | 02/08/2004 | Dissolved |
| Automotive Online Ltd | 03137278 | 02/08/2004 | Dissolved |
| Decision Point Ltd | 03078408 | 12/11/1998 | Dissolved |
| Eaglepath Ltd | 03042199 | 20/10/1998 | Dissolved |
| Executive Media Ltd | 03576846 | 02/08/2004 | Dissolved |
| Executive News Ltd | 03536641 | 02/08/2004 | Dissolved |
| Marlborough Software Ltd | 03074017 | 02/08/2004 | Dissolved |
| Polk Leeds Ltd | 02453896 | 12/11/1998 | Dissolved |
| Polk Ms Ltd | 03777750 | 26/05/1999 | Dissolved |
| Polk St Albans Ltd | 02485235 | 20/10/1998 | Dissolved |
| R. L. Polk Marketing Systems Ltd | 04101172 | 26/11/2001 | Dissolved |
| R. L. Polk Mitac Consultants Ltd | 03480967 | 02/08/2004 | Dissolved |
| R. L. Polk Mitac Ltd | 01870970 | 20/02/2004 | Dissolved |
| Roadtodata Publications Ltd | 05518149 | 30/05/2008 | Dissolved |
| T.U.P Services Ltd | 03429325 | 02/08/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AUTOROLA LTD | 03372055 | 02/08/2004 | 31/07/2006 | Gold |
| POLK EUROPE HOLDINGS LIMITED | 03386123 | 07/08/1998 | 05/01/2010 | Dissolved |
| POLKROADTODATA SOFTWARE LTD | 05285338 | 30/05/2008 | 12/11/2009 | Dissolved |
| POLKROADTODATA UK LTD | 05285286 | 05/06/2008 | 12/11/2009 | Dissolved |
| R. L. POLK UK LTD | 03086027 | 20/10/1998 | 05/01/2010 | Dissolved |