| Company | Timeline | Status | |
| Key Books Limited Director • Marketing Manager | 7 Apr 2000←1 Year 8 Months→31 Dec 2001 | Dissolved | |
| Key Publishing Limited Director • Marketing Manager | 2 Apr 1993←8 Years→31 Dec 2001 | Active | |
| Klavis Holdings Limited Director • Marketing Manager | 4 Jun 1991←10 Years→31 Dec 2001 | Active | |
| Key Exhibitions Limited Director • Marketing Manager | 2 Jun 1991←10 Years→31 Dec 2001 | Dissolved | |
