| Company | Timeline | Status | |
| Frogson Waste Oils Limited Secretary • Unreported | 24 Feb 2006←8 Years→31 May 2014 | Active | |
| Frogson Waste Management Limited Secretary • Unreported | 16 Nov 1999←14 Years→31 May 2014 | Active | |
| John Brindle Oil & Chemical Limited Secretary • Unreported | 30 Mar 1999←13 Years→25 May 2012 | Dissolved | |
