| Company | Timeline | Status | |
| Quinoline Foster LLP Non-designated LLP Member • Unreported | 30 Aug 2006←15 Years→20 Oct 2021 | Active | |
| Peter W. Foster Limited Director • Professor | 22 May 2000←21 Years→20 Oct 2021 | Dissolved | |
| Alderley Edge School For Girls Director • Director | 1 Sep 1999←2 Years→31 Aug 2001 | Active | |
| Worthington Group Plc Director • Director | 27 Apr 1999←4 Years→31 Jan 2004 | Liquidation | |
| Woodard Schools (Midland Division) Limited Director • University Professor | 29 Nov 1995←5 Years→1 Sep 2001 | Active | |
| Umist Ventures Limited Director • Professor | 1 Aug 1991←3 Years→5 Oct 1994 | Dissolved | |
