| Company | Timeline | Status | |
| S P W Group Limited Secretary • Accountant | 18 Sep 2001←21 Years→17 Nov 2022 | Active | |
| Ross Engineers Limited Secretary • Accountants | 7 Sep 2001←21 Years→17 Nov 2022 | Active | |
| Staffordshire Public Works Company,Limited(The) Secretary • Accountant | 26 May 1998←23 Years→19 Apr 2022 | Dissolved | |
| S.H. Johnson And Company Limited Secretary • Accountant | 26 May 1998←24 Years→17 Nov 2022 | Active | |
| NCK Limited Secretary • Unreported | 26 May 1998←13 Years→6 Apr 2012 | Active | |
| Elder Engineering Limited Secretary • Unreported | 26 May 1998←23 Years→17 Mar 2022 | Active | |
| SPW Traffic Control Limited Secretary • Unreported | 26 May 1998←24 Years→17 Nov 2022 | Active | |
