| Company | Timeline | Status | |
| GDM (Ecom) Ltd Director • Director | 30 May 2019←3 Years→11 Jul 2022 | Active | |
| Rudman Hartz Limited Director • Unreported | 19 Oct 2009←16 Years→Current | Active | |
| Hartz Solutions Limited Director • Director | 12 Oct 2006←18 Years→10 Dec 2024 | Dissolved | |
| The Hartz Company Limited Director • Company Director | 24 Sep 1999←26 Years→Current | Active | |
| Gatereps Limited Secretary • Unreported | 15 Sep 1999←26 Years→Current | Active | |
| Gatereps Limited Director • Travel Agent | 30 Apr 1998←1 Year 4 Months→15 Sep 1999 | Active | |
