| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| PROFIT PROTECTION PARTNERS LIMITED | NI630819 | 21/04/2015 | Dissolved |
| STH CONSULTANCY LTD | NI630790 | 20/04/2015 | Bronze |
| Sth Management Solutions Ltd | NI059909 | 26/06/2006 | Dissolved |
| WATER REGS UK LIMITED | 06663930 | 03/07/2018 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CITYBUS LIMITED | NI009039 | 01/07/2008 | 24/03/2011 | Silver |
| FLEXIBUS LIMITED | NI006724 | 01/07/2008 | 24/03/2011 | Not Trading |
| NIR NETWORKS LIMITED | NI017638 | 01/07/2008 | 24/03/2011 | Not Trading |
| NIR OPERATIONS LIMITED | NI021091 | 01/07/2008 | 24/03/2011 | Bronze |
| NORTHERN IRELAND RAILWAYS COMPANY LIMITED | NI006929 | 01/07/2008 | 24/03/2011 | Silver |
| NORTHERN IRELAND WATER LIMITED | NI054463 | 24/03/2011 | 31/03/2015 | Silver |
| SENTINUS | NI020310 | 04/06/2008 | 14/01/2010 | Silver |
| TRANSLINK (NI) LIMITED | NI006673 | 01/07/2008 | 24/03/2011 | Not Trading |
| ULSTERBUS LIMITED | NI006725 | 01/07/2008 | 24/03/2011 | Bronze |