| Company | Timeline | Status | |
| Kef Audio (UK) Limited Director • Vice Chairman & Managing Director | 20 Oct 1998←27 Years→Current | Active | |
KH Manufacturing (UK) Director • Vice Chairman & Managing Director | 20 Oct 1998←20 Years→26 Mar 2019 | Dissolved | |
| Celestion International Limited Director • Vice Chairman & Managing Director | 20 Oct 1998←27 Years→Current | Active | |
| GP Acoustics (UK) Limited Director • Vice Chairman & Managing Director | 20 Nov 1997←27 Years→Current | Active | |
