| Company | Timeline | Status | |
| Witherby Shipholding International Limited Director • Director | 29 Sep 2025←26 Days→Current | Active | |
| Witherby Estate Management Limited Director • Managing Director | 10 Sep 2013←12 Years→Current | Active | |
| Witherby Digital Limited Director • Managing Director | 12 Jun 2013←12 Years→Current | Active | |
| Witherby Investments Limited Director • Managing Director | 28 Jun 2012←13 Years→Current | Active | |
| Witherby Publishing Group Limited Director • Managing Director | 22 Jan 2008←17 Years→Current | Active | |
| Seamanship International Limited Secretary • Company Director | 15 Jun 2004←12 Years→7 Feb 2017 | Active | |
| Seamanship International Limited Director • Computer Related Activities | 23 Oct 1998←27 Years→Current | Active | |
