| Company | Timeline | Status | |
| Peter Shaffer Limited Director • Writer | 31 Dec 1992←23 Years→6 Jun 2016 | Active | |
| Shaffer Services Limited Director • Writer | 26 Nov 1992←23 Years→6 Jun 2016 | Active | |
| Peter Shaffer Limited Director • Unreported | 1 Jan 1970←46 Years→6 Jun 2016 | Active | |
