| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ANSTEEL HOLDINGS (UK) LIMITED | 07506369 | 26/01/2011 | Dissolved |
| HARLOW & JONES (UK) LIMITED | 02740621 | 03/09/1992 | Not Trading |
| L.W. LAMBOURN & CO. LIMITED | 01984061 | 28/10/2016 | Dissolved |
| Plasmacut Ltd | 02322724 | 02/07/2007 | Dissolved |
| SAMAC STEEL SUPPLIES LIMITED | 02278492 | 22/11/1991 | Dissolved |
| STEEL PLATE AND SECTIONS (SCOTLAND) LIMITED | SC063812 | 02/07/2007 | Dissolved |
| STEMCOR AGENCY SERVICES LIMITED | 07842594 | 10/11/2011 | Dissolved |
| STEMCOR BB LIMITED | 09628933 | 08/06/2015 | Dissolved |
| STEMCOR BELGIUM LIMITED | 09670259 | 03/07/2015 | Dissolved |
| STEMCOR CASH POOLING LIMITED | 07817526 | 31/03/2015 | Dissolved |
| STEMCOR DEUTSCHLAND BB LIMITED | 09743802 | 21/08/2015 | Dissolved |
| STEMCOR DISTRIBUTION LIMITED | 00759991 | 23/06/2005 | Bronze |
| STEMCOR EUROPEAN DISTRIBUTION LIMITED | 02655285 | 04/11/1991 | Dissolved |
| STEMCOR FRANCE LIMITED | 08820259 | 19/12/2013 | Silver |
| STEMCOR HOLDINGS 2 LIMITED | 08812874 | 12/12/2013 | Bronze |
| STEMCOR LIMITED | 00501712 | 10/02/2004 | Silver |
| STEMCOR LONDON LIMITED | 07764918 | 02/10/2013 | One Red Flag |
| STEMCOR LONDON TRADING LIMITED | 09659859 | 26/06/2015 | Bronze |
| STEMCOR MEIP LIMITED | 08839073 | 09/01/2014 | Dissolved |
| STEMCOR RISK MANAGEMENT AG | FC028991 | 28/05/2009 | Dissolved |
| THE IRONMONGERS' TRUST COMPANY | 07469661 | 06/07/2023 | Not Trading |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALPHASTEEL SALES LIMITED | 02481157 | 13/01/2004 | 10/07/2013 | Dissolved |
| BARCLAY & MATHIESON LIMITED | SC030987 | 18/03/2008 | 11/03/2015 | Silver |
| CLYDESIDE STEEL FABRICATIONS LIMITED | SC034675 | 18/03/2008 | 19/03/2015 | Dissolved |
| EUROMETAL LIMITED | 00393180 | 14/10/2015 | 23/04/2016 | Dissolved |
| FERRONERS PLC | 01271649 | 04/07/2019 | 06/07/2023 | Bronze |
| IRON PROPERTY LIMITED | 08137295 | 04/07/2019 | 06/07/2023 | Not Trading |
| IRON RATIONS LIMITED | 06135796 | 04/07/2019 | 06/07/2023 | Bronze |
| IRONMASTER LIMITED | 09728711 | 04/07/2019 | 06/07/2023 | Bronze |
| IRONSTONE MANAGEMENT LIMITED | 06770903 | 04/07/2019 | 06/07/2022 | Silver |
| MOORGATE INDUSTRIES 1 LIMITED | 08164949 | 12/12/2013 | 20/10/2015 | Dissolved |
| MOORGATE INDUSTRIES FINANCE LIMITED | 09744117 | 21/08/2015 | 01/10/2015 | Bronze |
| MOORGATE INDUSTRIES LIMITED | 01038435 | 17/06/1998 | 16/10/2015 | Insolvent |
| MOORGATE INDUSTRIES LOANS LIMITED | 01947996 | 22/06/2015 | 20/10/2015 | Dissolved |
| MOORGATE INDUSTRIES OFFSET SERVICES LIMITED | 07543592 | 02/07/2015 | 20/10/2015 | Dissolved |
| MOORGATE INDUSTRIES UK LIMITED | 00495682 | 09/01/2013 | 20/10/2015 | Amber |
| SSS SUPER ALLOYS LIMITED | 05045017 | 27/07/2009 | 06/04/2017 | Silver |
| STEEL PLATE AND SECTIONS LIMITED | 00853935 | 02/07/2007 | 06/04/2017 | Dissolved |
| STEMCOR CAPITAL LIMITED | 02189096 | 19/07/2011 | 19/03/2013 | Dissolved |
| THE IRONMONGERS' TRUST COMPANY | 07469661 | 04/07/2019 | 07/07/2022 | Not Trading |
| UNITED SLITTING SERVICES LIMITED | 04077951 | 24/06/2016 | 14/03/2018 | Amber |
| USS LIMITED | 04045212 | 24/06/2016 | 14/03/2018 | Silver |