| Company | Timeline | Status | |
| Pretzkow Limited Director • Auctioneer And Publisher | 22 Apr 1997←20 Years→24 Apr 2017 | Active | |
Plume Press Limited(The) Director • Auctioneer & Publisher | 29 Jan 1993←24 Years→24 Apr 2017 | Dissolved | |
| Plume Porcelain Company Limited Director • Auctioneer & Publisher | 9 Apr 1992←25 Years→24 Apr 2017 | Active | |
