| Company | Timeline | Status | |
| Iste Limited Secretary • Unreported  | 27 May 2003←1 Year 3 Months→22 Sep 2004  | Active  | |
| Iste Science Publishing Ltd Secretary • Unreported  | 16 May 2003←1 Year 11 Months→9 May 2005  | Active  | |
| Iste Press Limited Director • Publisher  | 15 Mar 2001←1 Year 2 Months→29 May 2002  | Active  | |
| Iste Editions Limited Secretary • Unreported  | 13 Apr 1999←5 Years→11 Oct 2004  | Active  | |
