| Company | Timeline | Status | |
| Geo Houlton & Sons (Developments) Limited Director • Chairman | 1 Sep 2018←7 Years→Current | Active | |
| Houlton York Limited Director • Unreported | 20 Mar 2008←17 Years→Current | Active | |
| Drypool Plant Limited Director • Unreported | 8 Aug 1997←28 Years→Current | Active | |
| Geo. Houlton & Sons (Holdings) Limited Director • Director | 19 Aug 1996←29 Years→Current | Active | |
| Geo Houlton & Sons Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
