| Company | Timeline | Status | |
| Ronald Harwood Limited Director • Literary Agent | 12 Jul 2013←12 Years→Current | Active | |
| Antony Harwood Limited Director • Literary Agent | 26 Sep 2000←25 Years→Current | Active | |
| Aitken Alexander Associates Limited Director • Literary Agent | 13 Mar 1995←5 Years→5 Oct 2000 | Active | |
| Curtis Brown Group Limited Director • Literary Agent | 27 Nov 1991←3 Years→10 Mar 1995 | Active | |
