| Company | Timeline | Status | |
| Markham Automatic Gates Limited Secretary • Unreported | 13 Jan 2000←25 Years→Current | Active | |
| A. Markham & Sons Limited Director • Unreported | 13 Jan 2000←25 Years→Current | Active | |
| Markham Automatic Gates Limited Director • Unreported | 20 Apr 1995←30 Years→Current | Active | |
