| Company | Timeline | Status | |
| Clough (Croydon) Limited Director • Director | 22 Apr 2003←22 Years→Current | Active | |
| Ashroyd Limited Director • Director | 17 Sep 2001←24 Years→Current | Active | |
| Ashton Aerospace & Defence Limited Director • Director | 8 Jun 1999←26 Years→Current | Active | |
| Ashton Berry Limited Director • Company Director | 16 Mar 1998←27 Years→Current | Active | |
| Ashtons Manufacturing Limited Director • Director | 14 Aug 1997←28 Years→Current | Active | |
| Thomas A. Ashton Developments Limited Director • Director | 20 Mar 1997←25 Years→27 Aug 2022 | Dissolved | |
| Ashtons (Sheffield) Limited Director • Director | 1 Jan 1996←30 Years→Current | Active | |
| Ashton Seals Usa Limited Director • Director | 1 Jan 1996←30 Years→Current | Active | |
| Ashton Seals Limited Director • Director | 1 May 1992←33 Years→Current | Active | |
| Thomas A. Ashton Limited Director • Director | 15 May 1991←34 Years→Current | Active | |
