| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| SIPCRETE LIMITED | 04974191 | 24/11/2003 | Dissolved |
| SIPTEC LTD | 04043874 | 31/07/2000 | Dissolved |
| SIPTEC MODULAR BUILDING SYSTEMS LTD | 07452557 | 26/11/2010 | Dissolved |
| SIPTEC-SIPCRETE LIMITED | 09498893 | 19/03/2015 | Dissolved |
| SIPTEC-SIPCRETE ORGANISATION LTD | 04111217 | 20/11/2000 | Dissolved |
| Structural Insulated Panel Technology Ltd | 05115261 | 01/05/2004 | Dissolved |
| Structural Insulated Panels Ltd | 03526891 | 13/03/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| HEMSEC DEVELOPMENTS LIMITED | 05228992 | 17/12/2004 | 31/08/2005 | Dissolved |
| Mantle Engineering Ltd | 03861392 | 19/10/1999 | 22/04/2000 | Dissolved |
| SIPHOUSE LIMITED | 04353468 | 18/02/2010 | 28/09/2010 | Dissolved |
| SIPS.UK LTD | 05254832 | 01/04/2005 | 13/01/2007 | Bronze |
| SIPTEC ANGLIA LTD | 05184981 | 26/07/2004 | 28/08/2009 | Dissolved |
| SIPTEC HOLIDAY HOMES LIMITED | 04070233 | 12/09/2000 | 01/03/2013 | Dissolved |