| Company | Timeline | Status | |
| Clarkson Valuations Limited Director • Economist | 20 Feb 2008←4 Years→31 May 2012 | Active | |
| Clarkson Research Services Limited Director • Economist | 30 Mar 2005←7 Years→31 May 2012 | Active | |
| Clarkson Research Holdings Limited Director • Economist | 13 Dec 2004←7 Years→31 May 2012 | Active | |
| Oilfield Publications Limited Director • Economist | 13 Dec 2004←7 Years→31 May 2012 | Dissolved | |
| Clarkson Plc Director • Economist | 1 Sep 2004←7 Years→8 Mar 2012 | Active | |
| Levelseas Limited Director • Economist | 31 Jan 2003←9 Years→31 May 2012 | Active | |
| Clarkson Shipbroking Group Limited Director • Economist | 26 Aug 1998←13 Years→31 May 2012 | Active | |
| H. Clarkson & Company Limited Director • Economist | 26 Aug 1998←13 Years→31 May 2012 | Active | |
| Lloyd's Maritime Information Services Limited Director • Economist | 20 Feb 1998←5 Months→10 Aug 1998 | Active | |
| Marecon Ltd Director • Unreported | 23 Oct 1997←28 Years→Current | Active | |
