| Company | Timeline | Status | |
| Aveling & Porter Limited Secretary • Unreported | 7 May 2003←22 Years→Current | Active | |
| Aveling-Barford Limited Secretary • Unreported | 7 May 2003←22 Years→Current | Active | |
| John Fowler & Co (Leeds) Limited Secretary • Unreported | 7 May 2003←11 Years→4 Jun 2014 | Active | |
| Marshall Sons & Company Limited Secretary • Unreported | 7 May 2003←15 Years→22 Jan 2019 | Active | |
| Richard Garrett & Sons Limited Secretary • Market Research | 10 Sep 1999←26 Years→Current | Active | |
