| Company | Timeline | Status | |
| Trinity Land Limited Director • Company Director | 23 Nov 1994←7 Months→19 Jul 1995 | Active | |
| John Langdon Limited Director • Company Director | 18 Jun 1993←32 Years→27 Aug 2025 | Dissolved | |
| John Langdon Limited Secretary • Unreported | 5 Apr 1992←33 Years→27 Aug 2025 | Dissolved | |
| John L Cars (Mitcham) Limited Director • Director | 6 Dec 1984←41 Years→Current | Active | |
