| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| VINYLS ITALIA 2 LIMITED | 05873923 | 20/07/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CHEMICAL INDUSTRIES ASSOCIATION LIMITED | 00860702 | 21/06/2012 | 21/11/2013 | Gold |
| INEOS AUTOMOTIVE LIMITED | 11201576 | 12/02/2018 | 18/02/2021 | One Red Flag |
| INEOS ENTERPRISES GROUP LIMITED | 04687714 | 05/03/2019 | 01/01/2020 | Silver |
| INEOS INDUSTRIAL INVESTMENTS LIMITED | 04588429 | 25/10/2004 | 16/10/2015 | Dissolved |
| INEOS INOVYN LIMITED | 08696245 | 27/05/2015 | 02/07/2015 | Silver |
| INEOS TECHNOLOGIES (HOLDINGS) LIMITED | 06716202 | 16/02/2017 | 01/01/2020 | Bronze |
| INEOS TECHNOLOGIES (VINYLS) LIMITED | 07085219 | 16/02/2017 | 01/01/2020 | Silver |
| INEOS VINYLS (II) LIMITED | 04241416 | 03/02/2006 | 16/10/2015 | Dissolved |
| INEOS VINYLS LIMITED | 05407940 | 13/02/2006 | 01/01/2020 | Gold |
| INOVYN CHLORVINYLS HOLDINGS LIMITED | 07085121 | 24/11/2009 | 01/01/2020 | Amber |
| INOVYN CHLORVINYLS LIMITED | 04068812 | 23/07/2001 | 01/01/2020 | Gold |
| INOVYN ENTERPRISES LIMITED | 04651437 | 02/07/2015 | 01/01/2020 | Amber |
| INOVYN EUROPE LIMITED | 10398354 | 28/09/2016 | 01/01/2020 | Bronze |
| INOVYN GROUP TREASURY LIMITED | 06179953 | 04/06/2008 | 01/01/2020 | One Red Flag |
| INOVYN HOLDINGS LIMITED | 10204869 | 28/05/2016 | 09/01/2020 | Dissolved |
| INOVYN SERVICES LIMITED | 04797474 | 26/03/2013 | 01/01/2020 | Amber |
| KERLING NEWCO 1 LIMITED | 09613152 | 28/05/2015 | 01/01/2020 | Gold |
| KERLING NEWCO 2 LIMITED | 09613220 | 29/05/2015 | 01/01/2020 | Gold |
| KEUPER GAS STORAGE LIMITED | 08850140 | 05/03/2019 | 01/01/2020 | Amber |
| RUNCORN MCP LIMITED | 09117961 | 07/07/2014 | 01/08/2015 | Gold |
| VYNOVA RUNCORN LIMITED | 09117971 | 07/07/2014 | 01/08/2015 | Silver |