| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BRITISH STANDARDS (PUBLISHING) LIMITED | 03909666 | 07/10/2011 | Dissolved |
| BRITISH STANDARDS LIMITED | 05901534 | 07/10/2011 | Dissolved |
| BSI BRITISH STANDARDS LIMITED | 03555090 | 07/10/2011 | Dissolved |
| BSI CORPORATION LIMITED | 06017976 | 07/10/2011 | Dissolved |
| BSI GLOBAL LIMITED | 06017979 | 07/10/2011 | Dissolved |
| BSI GROUP INTERNATIONAL LIMITED | 06017931 | 07/10/2011 | Dissolved |
| BSI LEARNING LIMITED | 06017983 | 07/10/2011 | Dissolved |
| BSI PRODUCT SERVICES HOLDINGS LIMITED | 05901122 | 07/10/2011 | Dissolved |
| BSI PRODUCT SERVICES LIMITED | 05901081 | 07/10/2011 | Dissolved |
| BSI PRODUCT SERVICES UK LIMITED | 01857097 | 07/10/2011 | Dissolved |
| ENTROPY INTERNATIONAL LIMITED | 03219952 | 07/10/2011 | Dissolved |
| ESPION (UK) LIMITED | 04955518 | 31/03/2016 | Dissolved |
| HYPERCAT SERVICES LIMITED | 10611531 | 09/02/2017 | Dissolved |
| Ineum Corporate Finance Ltd | 06650585 | 18/07/2008 | Dissolved |
| Ineum Ltd | 06650600 | 18/07/2008 | Dissolved |
| KITEMARK LIMITED | 03120262 | 07/10/2011 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALEXANDER PROUDFOOT (EUROPE) LIMITED | 02452071 | 01/05/2007 | 31/10/2010 | One Red Flag |
| ALEXANDER PROUDFOOT COMPANY OF EUROPE LIMITED | 01054993 | 01/05/2007 | 31/10/2010 | Dissolved |
| ALEXANDER PROUDFOOT LIMITED | 02475731 | 01/05/2007 | 31/10/2010 | Dissolved |
| BSI ASSURANCE UK LIMITED | 07805321 | 11/10/2011 | 31/07/2021 | Silver |
| BSI GROUP ASSURANCE LIMITED | 05435540 | 07/10/2011 | 31/07/2021 | Bronze |
| BSI LIMITED | 03555107 | 07/10/2011 | 31/07/2021 | Bronze |
| BSI MANAGEMENT SYSTEMS LTD. | 03555812 | 07/10/2011 | 31/07/2021 | One Red Flag |
| BSI PENSION TRUST LIMITED | 01558042 | 07/01/2021 | 31/07/2021 | Dissolved |
| BSI PROFESSIONAL SERVICES (UK) LIMITED | 06736691 | 01/10/2016 | 31/07/2021 | Bronze |
| BSI PROFESSIONAL SERVICES EMEA LIMITED | 07805331 | 11/10/2011 | 31/07/2021 | One Red Flag |
| BSI PROFESSIONAL SERVICES HOLDINGS LIMITED | 05901123 | 07/10/2011 | 31/07/2021 | Amber |
| BSI SERVICES HOLDINGS LIMITED | 02258478 | 07/10/2011 | 31/07/2021 | One Red Flag |
| BSI STANDARDS HOLDINGS LIMITED | 05901209 | 07/10/2011 | 31/07/2021 | Silver |
| BSI STANDARDS LIMITED | 07864997 | 29/11/2011 | 31/07/2021 | One Red Flag |
| HYPERCAT ALLIANCE LIMITED | 09573862 | 28/07/2017 | 31/07/2021 | Dissolved |
| KURT SALMON ASSOCIATES LIMITED | 00641077 | 12/10/2007 | 31/10/2010 | Dissolved |
| KURT SALMON UKI LIMITED | 01299222 | 01/05/2007 | 31/10/2010 | Dissolved |
| MANAGEMENT CONSULTANCY GROUP LIMITED | 01624814 | 01/05/2007 | 31/10/2010 | Dissolved |
| MANAGEMENT CONSULTING GROUP OVERSEAS LIMITED | 02170154 | 01/05/2007 | 31/10/2010 | One Red Flag |
| MANAGEMENT CONSULTING GROUP PLC | 01000608 | 26/04/2007 | 31/10/2010 | One Red Flag |
| MCG COMPANY NO 1 LTD | 04897584 | 01/05/2007 | 31/10/2010 | Amber |
| MCG COMPANY NO 4 LIMITED | 05117093 | 01/05/2007 | 31/10/2010 | Dissolved |
| MCG OVERSEAS HOLDINGS LIMITED | 06690589 | 05/09/2008 | 31/10/2010 | Dissolved |
| NEVILLE-CLARKE INTERNATIONAL LIMITED | 02300908 | 01/12/2017 | 31/07/2021 | Silver |
| THE BRITISH STANDARDS INSTITUTION | ZC000202 | 15/08/2011 | 31/07/2021 | Gold |
| VIADUCT CONSULTING LIMITED | 06313039 | 16/07/2007 | 31/10/2010 | Dissolved |