| Company | Timeline | Status | |
| Tate Foundation Director • Publisher | 5 Sep 2006←2 Years 2 Months→4 Nov 2008 | Active | |
| Art Commissioners Limited Secretary • University Prof | 3 Feb 2004←11 Months→20 Jan 2005 | Active | |
Ebony Press Limited Director • University Professor | 21 Jan 2002←14 Years→9 Feb 2016 | Dissolved | |
| Ivory Press Limited Director • Professor University | 26 Apr 2001←15 Years→20 Feb 2017 | Dissolved | |
| Ivory Press Limited Secretary • Professor University | 26 Apr 2001←9 Months→5 Feb 2002 | Dissolved | |
| Norman Foster Foundation (UK) Director • Director | 14 Jul 1999←26 Years→Current | Active | |
