| Company | Timeline | Status | |
| Antiquarian Booksellers Association (International) Director • Company Director | 2 Jul 2003←9 Years→18 Apr 2013 | Active | |
| Jonathan Potter Limited Director • Antique Map Dealer | 30 Jul 1992←33 Years→Current | Liquidation | |
| Jonathan Potter Limited Secretary • Unreported | 30 Jul 1992←33 Years→Current | Liquidation | |
