| Company | Timeline | Status | |
| Cartmel Steeplechases Limited Director • Unreported | 31 Mar 1998←27 Years→Current | Active | |
| Cartmel Steeplechases (Holker) Limited Director • Unreported | 10 Mar 1998←27 Years→Current | Active | |
| Burlington Slate Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Holker Holdings Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Holker Estates Co. Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Holbeck Homes Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Roose & Walney Sand & Gravel Company Limited(The) Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Burlington Slate Production Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Vitagrass Farms (Holker) Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Broughton Moor Green Slate Quarries Limited(The) Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
