| Company | Timeline | Status | |
| Kef Audio (UK) Limited Secretary • Unreported | 1 Nov 2006←18 Years→Current | Active | |
| GP Acoustics (UK) Limited Secretary • Unreported | 1 Nov 2006←18 Years→Current | Active | |
KH Manufacturing (UK) Secretary • Unreported | 1 Nov 2006←12 Years→26 Mar 2019 | Dissolved | |
| Celestion International Limited Secretary • Unreported | 1 Nov 2006←18 Years→Current | Active | |
