| Company | Timeline | Status | |
| Jo Plowright & Co Ltd Director • Chairman | 18 Mar 2019←6 Years→Current | Active | |
| Jo Plowright & Co (Chartering) Ltd Director • Chairman | 18 Mar 2019←6 Years→Current | Active | |
| Jo Plowright & Co (Tankers) Ltd Director • Chairman | 18 Mar 2019←6 Years→Current | Active | |
| Liquid Commodity Solutions Limited Director • Unreported | 31 Jan 2017←8 Years→Current | Active | |
| Spi Marine (UK) Limited Director • Shipping Agent | 28 Mar 2014←11 Years→Current | Active | |
| H. Clarkson & Company Limited Director • Ship Broker | 1 Aug 2007←6 Years→17 Mar 2014 | Active | |
J.O. Plowright & Co. (Holdings) Ltd Director • Shipbroker | 1 Sep 2001←4 Years→3 Jan 2006 | Dissolved | |
