| Company | Timeline | Status | |
| Opus Publishing Limited Director • Company Director | 3 Nov 1991←29 Years→16 Mar 2021 | Dissolved | |
| Werner Forman Archive Limited Director • Archivist | 2 Nov 1991←29 Years→31 Dec 2020 | Liquidation | |
| Opus Publishing Limited Director • Company Director | 1 Jan 1970←51 Years→16 Mar 2021 | Dissolved | |
