| Company | Timeline | Status | |
| Cook Precision Ceramic Castings Limited Director • Chartered Accountant | 15 Oct 2025←1 Month→Current | Active | |
| Cook Rail Systems Limited Director • Accountant | 12 Jul 2024←1 Year 4 Months→Current | Active | |
| Weardale Investments Limited Director • Accountant | 24 Apr 2024←1 Year 7 Months→Current | Active | |
| Chesterfield Metal Technologies Limited Director • Accountant | 24 Apr 2024←1 Year 7 Months→Current | Active | |
| William Cook Rail Limited Director • Accountant | 24 Apr 2024←1 Year 7 Months→Current | Active | |
| William Cook Defence Limited Director • Accountant | 24 Apr 2024←1 Year 7 Months→Current | Active | |
| William Cook Leaseholds Limited Director • Accountant | 24 Apr 2024←1 Year 7 Months→Current | Active | |
| William Cook Publishing Limited Director • Accountant | 24 Apr 2024←1 Year 7 Months→Current | Active | |
| Astrum (UK) Limited Director • Accountant | 24 Apr 2024←1 Year 7 Months→Current | Active | |
| William Cook Aviation Limited Director • Accountant | 24 Apr 2024←1 Year 7 Months→Current | Active | |
