| Company | Timeline | Status | |
| Jonathan Kearns Rare Books And Curiosities Limited Director • Book Dealer | 13 Jul 2017←6 Years→19 Mar 2024 | Dissolved | |
| Antiquarian Booksellers Association (International) Director • Bookseller | 23 Mar 2016←4 Years→10 Jun 2020 | Active | |
| York Antiquarian Book Seminar Ltd Director • Bookseller | 23 Mar 2015←7 Years→23 Aug 2022 | Dissolved | |
