| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| JAVA COFFEE COMPANY LIMITED | 11252985 | 13/03/2018 | Dissolved |
| PROTON CHEMICALS LIMITED | 02561742 | 29/09/2006 | Dissolved |
| PROTON GROUP HOLDINGS LIMITED | 04901229 | 16/09/2003 | Dissolved |
| PROTON HOLDINGS LIMITED | 06546770 | 27/03/2008 | One Red Flag |
| PYE GROUP LTD | 15493340 | 15/02/2024 | Bronze |
| Proton Chemicals (London) Ltd | 01125544 | 31/01/2002 | Dissolved |
| Proton Chemicals (Northern) Ltd | 01504861 | 22/11/1999 | Dissolved |
| SWC HEALTH AND HYGIENE LIMITED | 00822399 | 29/09/2006 | Dissolved |
| THE PROTON GROUP LIMITED | 01000982 | 27/04/1999 | Pre-I |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CHEMBLEND LIMITED | 01950729 | 22/11/1999 | 29/09/2006 | Dissolved |
| CHEMBLEND LIMITED | 01950729 | 26/06/2000 | 10/07/2000 | Dissolved |
| CRAWSHAW MILLS MANAGEMENT LIMITED | 02922189 | 01/05/2015 | 05/03/2024 | Silver |
| INTERCHEM LIMITED | 02637217 | 25/09/2000 | 21/07/2009 | Dissolved |
| INTERCHEM LIMITED | 02637217 | 26/06/2000 | 10/07/2000 | Dissolved |
| PROTON CHEMICALS LIMITED | 02561742 | 22/11/1999 | 29/09/2006 | Dissolved |
| PROTON CHEMICALS LIMITED | 02561742 | 26/06/2000 | 10/07/2000 | Dissolved |
| Proton Chemicals (London) Ltd | 01125544 | 11/01/2000 | 29/03/2000 | Dissolved |
| Proton Chemicals (Northern) Ltd | 01504861 | 26/06/2000 | 10/07/2000 | Dissolved |
| SWC HEALTH AND HYGIENE LIMITED | 00822399 | 08/09/2000 | 29/09/2006 | Dissolved |
| THE PROTON GROUP LIMITED | 01000982 | 22/11/1999 | 29/09/2006 | Pre-I |