| Company | Timeline | Status | |
| Kef Audio (UK) Limited Director • Vice Chairman | 22 May 2006←3 Years→1 Jul 2009 | Active | |
KH Manufacturing (UK) Director • Vice Chairman | 22 May 2006←2 Years 6 Months→28 Nov 2008 | Dissolved | |
| Celestion International Limited Director • Vice Chairman | 22 May 2006←3 Years→1 Jul 2009 | Active | |
| GP Acoustics (UK) Limited Director • Vice Chairman | 1 Jul 2003←14 Years→18 Dec 2017 | Active | |
