| Company | Timeline | Status | |
| Antiquarian Booksellers Association (International) Director • Unreported | 25 Mar 2021←4 Years→Current | Active | |
| Art Library Limited Director • Unreported | 19 Feb 2016←9 Years→Current | Active | |
Orange Square Marketing & Publicity Limited Director • Bookseller | 14 Feb 1996←2 Years 7 Months→22 Sep 1998 | Dissolved | |
| The Art Book Survey Limited Director • Unreported | 20 Oct 1992←33 Years→Current | Active | |
| Thomas Heneage & Co. Limited Director • Unreported | 26 Jun 1991←34 Years→Current | Active | |
| Shepherds Bookbinders Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
